(function(){

    var DomReady = window.DomReady = {};

	// Everything that has to do with properly supporting our document ready event. Brought over from the most awesome jQuery.

    var userAgent = navigator.userAgent.toLowerCase();

    // Figure out what browser is being used
    var browser = {
    	version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
    	safari: /webkit/.test(userAgent),
    	opera: /opera/.test(userAgent),
    	msie: (/msie/.test(userAgent)) && (!/opera/.test( userAgent )),
    	mozilla: (/mozilla/.test(userAgent)) && (!/(compatible|webkit)/.test(userAgent))
    };

	var readyBound = false;
	var isReady = false;
	var readyList = [];

	// Handle when the DOM is ready
	function domReady() {
		// Make sure that the DOM is not already loaded
		if(!isReady) {
			// Remember that the DOM is ready
			isReady = true;

	        if(readyList) {
	            for(var fn = 0; fn < readyList.length; fn++) {
	                readyList[fn].call(window, []);
	            }

	            readyList = [];
	        }
		}
	};

	// From Simon Willison. A safe way to fire onload w/o screwing up everyone else.
	function addLoadEvent(func) {
	  var oldonload = window.onload;
	  if (typeof window.onload != 'function') {
	    window.onload = func;
	  } else {
	    window.onload = function() {
	      if (oldonload) {
	        oldonload();
	      }
	      func();
	    }
	  }
	};

	// does the heavy work of working through the browsers idiosyncracies (let's call them that) to hook onload.
	function bindReady() {
		if(readyBound) {
		    return;
	    }

		readyBound = true;

		// Mozilla, Opera (see further below for it) and webkit nightlies currently support this event
		if (document.addEventListener && !browser.opera) {
			// Use the handy event callback
			document.addEventListener("DOMContentLoaded", domReady, false);
		}

		// If IE is used and is not in a frame
		// Continually check to see if the document is ready
		if (browser.msie && window == top) (function(){
			if (isReady) return;
			try {
				// If IE is used, use the trick by Diego Perini
				// http://javascript.nwbox.com/IEContentLoaded/
				document.documentElement.doScroll("left");
			} catch(error) {
				setTimeout(arguments.callee, 0);
				return;
			}
			// and execute any waiting functions
		    domReady();
		})();

		if(browser.opera) {
			document.addEventListener( "DOMContentLoaded", function () {
				if (isReady) return;
				for (var i = 0; i < document.styleSheets.length; i++)
					if (document.styleSheets[i].disabled) {
						setTimeout( arguments.callee, 0 );
						return;
					}
				// and execute any waiting functions
	            domReady();
			}, false);
		}

		if(browser.safari) {
		    var numStyles;
			(function(){
				if (isReady) return;
				if (document.readyState != "loaded" && document.readyState != "complete") {
					setTimeout( arguments.callee, 0 );
					return;
				}
				if (numStyles === undefined) {
	                var links = document.getElementsByTagName("link");
	                for (var i=0; i < links.length; i++) {
	                	if(links[i].getAttribute('rel') == 'stylesheet') {
	                	    numStyles++;
	                	}
	                }
	                var styles = document.getElementsByTagName("style");
	                numStyles += styles.length;
				}
				if (document.styleSheets.length != numStyles) {
					setTimeout( arguments.callee, 0 );
					return;
				}

				// and execute any waiting functions
				domReady();
			})();
		}

		// A fallback to window.onload, that will always work
	    addLoadEvent(domReady);
	};

	// This is the public function that people can use to hook up ready.
	DomReady.ready = function(fn, args) {
		// Attach the listeners
		bindReady();

		// If the DOM is already ready
		if (isReady) {
			// Execute the function immediately
			fn.call(window, []);
	    } else {
			// Add the function to the wait list
	        readyList.push( function() { return fn.call(window, []); } );
	    }
	};

	bindReady();

})();// Underscore.js 1.3.3
// (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
// Underscore is freely distributable under the MIT license.
// Portions of Underscore are inspired or borrowed from Prototype,
// Oliver Steele's Functional, and John Resig's Micro-Templating.
// For all details and documentation:
// http://documentcloud.github.com/underscore
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b.chain=function(a){return b(a).chain()};var m=function(a){this._wrapped=a};b.prototype=m.prototype;var x=function(a,c){return c?b(a).chain():a},M=function(a,c){m.prototype[a]=function(){var a=i.call(arguments);J.call(a,this._wrapped);return x(c.apply(b,a),this._chain)}};b.mixin(b);j("pop,push,reverse,shift,sort,splice,unshift".split(","),function(a){var b=k[a];m.prototype[a]=function(){var d=this._wrapped;b.apply(d,arguments);var e=d.length;(a=="shift"||a=="splice")&&e===0&&delete d[0];return x(d,
this._chain)}});j(["concat","join","slice"],function(a){var b=k[a];m.prototype[a]=function(){return x(b.apply(this._wrapped,arguments),this._chain)}});m.prototype.chain=function(){this._chain=true;return this};m.prototype.value=function(){return this._wrapped}}).call(this);// tquery.js - https://github.com/jeromeetienne/tquery - MIT License
// vim: ts=4 sts=4 sw=4 expandtab
// -- kriskowal Kris Kowal Copyright (C) 2009-2011 MIT License
// -- tlrobinson Tom Robinson Copyright (C) 2009-2010 MIT License (Narwhal Project)
// -- dantman Daniel Friesen Copyright (C) 2010 XXX TODO License or CLA
// -- fschaefer Florian Schäfer Copyright (C) 2010 MIT License
// -- Gozala Irakli Gozalishvili Copyright (C) 2010 MIT License
// -- kitcambridge Kit Cambridge Copyright (C) 2011 MIT License
// -- kossnocorp Sasha Koss XXX TODO License or CLA
// -- bryanforbes Bryan Forbes XXX TODO License or CLA
// -- killdream Quildreen Motta Copyright (C) 2011 MIT Licence
// -- michaelficarra Michael Ficarra Copyright (C) 2011 3-clause BSD License
// -- sharkbrainguy Gerard Paapu Copyright (C) 2011 MIT License
// -- bbqsrc Brendan Molloy (C) 2011 Creative Commons Zero (public domain)
// -- iwyg XXX TODO License or CLA
// -- DomenicDenicola Domenic Denicola Copyright (C) 2011 MIT License
// -- xavierm02 Montillet Xavier Copyright (C) 2011 MIT License
// -- Raynos Jake Verbaten Copyright (C) 2011 MIT Licence
// -- samsonjs Sami Samhuri Copyright (C) 2010 MIT License
// -- rwldrn Rick Waldron Copyright (C) 2011 MIT License
// -- lexer Alexey Zakharov XXX TODO License or CLA

/*!
    Copyright (c) 2009, 280 North Inc. http://280north.com/
    MIT License. http://github.com/280north/narwhal/blob/master/README.md
*/

// Module systems magic dance
(function (definition) {
    // RequireJS
    if (typeof define == "function") {
        define(definition);
    // CommonJS and <script>
    } else {
        definition();
    }
})(function () {

/**
 * Brings an environment as close to ECMAScript 5 compliance
 * as is possible with the facilities of erstwhile engines.
 *
 * Annotated ES5: http://es5.github.com/ (specific links below)
 * ES5 Spec: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf
 * Required reading: http://javascriptweblog.wordpress.com/2011/12/05/extending-javascript-natives/
 */

//
// Function
// ========
//

// ES-5 15.3.4.5
// http://es5.github.com/#x15.3.4.5

if (!Function.prototype.bind) {
    Function.prototype.bind = function bind(that) { // .length is 1
        // 1. Let Target be the this value.
        var target = this;
        // 2. If IsCallable(Target) is false, throw a TypeError exception.
        if (typeof target != "function") {
            throw new TypeError("Function.prototype.bind called on incompatible " + target);
        }
        // 3. Let A be a new (possibly empty) internal list of all of the
        //   argument values provided after thisArg (arg1, arg2 etc), in order.
        // XXX slicedArgs will stand in for "A" if used
        var args = slice.call(arguments, 1); // for normal call
        // 4. Let F be a new native ECMAScript object.
        // 11. Set the [[Prototype]] internal property of F to the standard
        //   built-in Function prototype object as specified in 15.3.3.1.
        // 12. Set the [[Call]] internal property of F as described in
        //   15.3.4.5.1.
        // 13. Set the [[Construct]] internal property of F as described in
        //   15.3.4.5.2.
        // 14. Set the [[HasInstance]] internal property of F as described in
        //   15.3.4.5.3.
        var bound = function () {

            if (this instanceof bound) {
                // 15.3.4.5.2 [[Construct]]
                // When the [[Construct]] internal method of a function object,
                // F that was created using the bind function is called with a
                // list of arguments ExtraArgs, the following steps are taken:
                // 1. Let target be the value of F's [[TargetFunction]]
                //   internal property.
                // 2. If target has no [[Construct]] internal method, a
                //   TypeError exception is thrown.
                // 3. Let boundArgs be the value of F's [[BoundArgs]] internal
                //   property.
                // 4. Let args be a new list containing the same values as the
                //   list boundArgs in the same order followed by the same
                //   values as the list ExtraArgs in the same order.
                // 5. Return the result of calling the [[Construct]] internal
                //   method of target providing args as the arguments.

                var F = function(){};
                F.prototype = target.prototype;
                var self = new F;

                var result = target.apply(
                    self,
                    args.concat(slice.call(arguments))
                );
                if (Object(result) === result) {
                    return result;
                }
                return self;

            } else {
                // 15.3.4.5.1 [[Call]]
                // When the [[Call]] internal method of a function object, F,
                // which was created using the bind function is called with a
                // this value and a list of arguments ExtraArgs, the following
                // steps are taken:
                // 1. Let boundArgs be the value of F's [[BoundArgs]] internal
                //   property.
                // 2. Let boundThis be the value of F's [[BoundThis]] internal
                //   property.
                // 3. Let target be the value of F's [[TargetFunction]] internal
                //   property.
                // 4. Let args be a new list containing the same values as the
                //   list boundArgs in the same order followed by the same
                //   values as the list ExtraArgs in the same order.
                // 5. Return the result of calling the [[Call]] internal method
                //   of target providing boundThis as the this value and
                //   providing args as the arguments.

                // equiv: target.call(this, ...boundArgs, ...args)
                return target.apply(
                    that,
                    args.concat(slice.call(arguments))
                );

            }

        };
        // XXX bound.length is never writable, so don't even try
        //
        // 15. If the [[Class]] internal property of Target is "Function", then
        //     a. Let L be the length property of Target minus the length of A.
        //     b. Set the length own property of F to either 0 or L, whichever is
        //       larger.
        // 16. Else set the length own property of F to 0.
        // 17. Set the attributes of the length own property of F to the values
        //   specified in 15.3.5.1.

        // TODO
        // 18. Set the [[Extensible]] internal property of F to true.

        // TODO
        // 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3).
        // 20. Call the [[DefineOwnProperty]] internal method of F with
        //   arguments "caller", PropertyDescriptor {[[Get]]: thrower, [[Set]]:
        //   thrower, [[Enumerable]]: false, [[Configurable]]: false}, and
        //   false.
        // 21. Call the [[DefineOwnProperty]] internal method of F with
        //   arguments "arguments", PropertyDescriptor {[[Get]]: thrower,
        //   [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: false},
        //   and false.

        // TODO
        // NOTE Function objects created using Function.prototype.bind do not
        // have a prototype property or the [[Code]], [[FormalParameters]], and
        // [[Scope]] internal properties.
        // XXX can't delete prototype in pure-js.

        // 22. Return F.
        return bound;
    };
}

// Shortcut to an often accessed properties, in order to avoid multiple
// dereference that costs universally.
// _Please note: Shortcuts are defined after `Function.prototype.bind` as we
// us it in defining shortcuts.
var call = Function.prototype.call;
var prototypeOfArray = Array.prototype;
var prototypeOfObject = Object.prototype;
var slice = prototypeOfArray.slice;
// Having a toString local variable name breaks in Opera so use _toString.
var _toString = call.bind(prototypeOfObject.toString);
var owns = call.bind(prototypeOfObject.hasOwnProperty);

// If JS engine supports accessors creating shortcuts.
var defineGetter;
var defineSetter;
var lookupGetter;
var lookupSetter;
var supportsAccessors;
if ((supportsAccessors = owns(prototypeOfObject, "__defineGetter__"))) {
    defineGetter = call.bind(prototypeOfObject.__defineGetter__);
    defineSetter = call.bind(prototypeOfObject.__defineSetter__);
    lookupGetter = call.bind(prototypeOfObject.__lookupGetter__);
    lookupSetter = call.bind(prototypeOfObject.__lookupSetter__);
}

//
// Array
// =====
//

// ES5 15.4.3.2
// http://es5.github.com/#x15.4.3.2
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/isArray
if (!Array.isArray) {
    Array.isArray = function isArray(obj) {
        return _toString(obj) == "[object Array]";
    };
}

// The IsCallable() check in the Array functions
// has been replaced with a strict check on the
// internal class of the object to trap cases where
// the provided function was actually a regular
// expression literal, which in V8 and
// JavaScriptCore is a typeof "function".  Only in
// V8 are regular expression literals permitted as
// reduce parameters, so it is desirable in the
// general case for the shim to match the more
// strict and common behavior of rejecting regular
// expressions.

// ES5 15.4.4.18
// http://es5.github.com/#x15.4.4.18
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/forEach
if (!Array.prototype.forEach) {
    Array.prototype.forEach = function forEach(fun /*, thisp*/) {
        var self = toObject(this),
            thisp = arguments[1],
            i = -1,
            length = self.length >>> 0;

        // If no callback function or if callback is not a callable function
        if (_toString(fun) != "[object Function]") {
            throw new TypeError(); // TODO message
        }

        while (++i < length) {
            if (i in self) {
                // Invoke the callback function with call, passing arguments:
                // context, property value, property key, thisArg object context
                fun.call(thisp, self[i], i, self);
            }
        }
    };
}

// ES5 15.4.4.19
// http://es5.github.com/#x15.4.4.19
// https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/map
if (!Array.prototype.map) {
    Array.prototype.map = function map(fun /*, thisp*/) {
        var self = toObject(this),
            length = self.length >>> 0,
            result = Array(length),
            thisp = arguments[1];

        // If no callback function or if callback is not a callable function
        if (_toString(fun) != "[object Function]") {
            throw new TypeError(fun + " is not a function");
        }

        for (var i = 0; i < length; i++) {
            if (i in self)
                result[i] = fun.call(thisp, self[i], i, self);
        }
        return result;
    };
}

// ES5 15.4.4.20
// http://es5.github.com/#x15.4.4.20
// https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/filter
if (!Array.prototype.filter) {
    Array.prototype.filter = function filter(fun /*, thisp */) {
        var self = toObject(this),
            length = self.length >>> 0,
            result = [],
            value,
            thisp = arguments[1];

        // If no callback function or if callback is not a callable function
        if (_toString(fun) != "[object Function]") {
            throw new TypeError(fun + " is not a function");
        }

        for (var i = 0; i < length; i++) {
            if (i in self) {
                value = self[i];
                if (fun.call(thisp, value, i, self)) {
                    result.push(value);
                }
            }
        }
        return result;
    };
}

// ES5 15.4.4.16
// http://es5.github.com/#x15.4.4.16
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/every
if (!Array.prototype.every) {
    Array.prototype.every = function every(fun /*, thisp */) {
        var self = toObject(this),
            length = self.length >>> 0,
            thisp = arguments[1];

        // If no callback function or if callback is not a callable function
        if (_toString(fun) != "[object Function]") {
            throw new TypeError(fun + " is not a function");
        }

        for (var i = 0; i < length; i++) {
            if (i in self && !fun.call(thisp, self[i], i, self)) {
                return false;
            }
        }
        return true;
    };
}

// ES5 15.4.4.17
// http://es5.github.com/#x15.4.4.17
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/some
if (!Array.prototype.some) {
    Array.prototype.some = function some(fun /*, thisp */) {
        var self = toObject(this),
            length = self.length >>> 0,
            thisp = arguments[1];

        // If no callback function or if callback is not a callable function
        if (_toString(fun) != "[object Function]") {
            throw new TypeError(fun + " is not a function");
        }

        for (var i = 0; i < length; i++) {
            if (i in self && fun.call(thisp, self[i], i, self)) {
                return true;
            }
        }
        return false;
    };
}

// ES5 15.4.4.21
// http://es5.github.com/#x15.4.4.21
// https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduce
if (!Array.prototype.reduce) {
    Array.prototype.reduce = function reduce(fun /*, initial*/) {
        var self = toObject(this),
            length = self.length >>> 0;

        // If no callback function or if callback is not a callable function
        if (_toString(fun) != "[object Function]") {
            throw new TypeError(fun + " is not a function");
        }

        // no value to return if no initial value and an empty array
        if (!length && arguments.length == 1) {
            throw new TypeError('reduce of empty array with no initial value');
        }

        var i = 0;
        var result;
        if (arguments.length >= 2) {
            result = arguments[1];
        } else {
            do {
                if (i in self) {
                    result = self[i++];
                    break;
                }

                // if array contains no values, no initial value to return
                if (++i >= length) {
                    throw new TypeError('reduce of empty array with no initial value');
                }
            } while (true);
        }

        for (; i < length; i++) {
            if (i in self) {
                result = fun.call(void 0, result, self[i], i, self);
            }
        }

        return result;
    };
}

// ES5 15.4.4.22
// http://es5.github.com/#x15.4.4.22
// https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduceRight
if (!Array.prototype.reduceRight) {
    Array.prototype.reduceRight = function reduceRight(fun /*, initial*/) {
        var self = toObject(this),
            length = self.length >>> 0;

        // If no callback function or if callback is not a callable function
        if (_toString(fun) != "[object Function]") {
            throw new TypeError(fun + " is not a function");
        }

        // no value to return if no initial value, empty array
        if (!length && arguments.length == 1) {
            throw new TypeError('reduceRight of empty array with no initial value');
        }

        var result, i = length - 1;
        if (arguments.length >= 2) {
            result = arguments[1];
        } else {
            do {
                if (i in self) {
                    result = self[i--];
                    break;
                }

                // if array contains no values, no initial value to return
                if (--i < 0) {
                    throw new TypeError('reduceRight of empty array with no initial value');
                }
            } while (true);
        }

        do {
            if (i in this) {
                result = fun.call(void 0, result, self[i], i, self);
            }
        } while (i--);

        return result;
    };
}

// ES5 15.4.4.14
// http://es5.github.com/#x15.4.4.14
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf
if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function indexOf(sought /*, fromIndex */ ) {
        var self = toObject(this),
            length = self.length >>> 0;

        if (!length) {
            return -1;
        }

        var i = 0;
        if (arguments.length > 1) {
            i = toInteger(arguments[1]);
        }

        // handle negative indices
        i = i >= 0 ? i : Math.max(0, length + i);
        for (; i < length; i++) {
            if (i in self && self[i] === sought) {
                return i;
            }
        }
        return -1;
    };
}

// ES5 15.4.4.15
// http://es5.github.com/#x15.4.4.15
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/lastIndexOf
if (!Array.prototype.lastIndexOf) {
    Array.prototype.lastIndexOf = function lastIndexOf(sought /*, fromIndex */) {
        var self = toObject(this),
            length = self.length >>> 0;

        if (!length) {
            return -1;
        }
        var i = length - 1;
        if (arguments.length > 1) {
            i = Math.min(i, toInteger(arguments[1]));
        }
        // handle negative indices
        i = i >= 0 ? i : length - Math.abs(i);
        for (; i >= 0; i--) {
            if (i in self && sought === self[i]) {
                return i;
            }
        }
        return -1;
    };
}

//
// Object
// ======
//

// ES5 15.2.3.2
// http://es5.github.com/#x15.2.3.2
if (!Object.getPrototypeOf) {
    // https://github.com/kriskowal/es5-shim/issues#issue/2
    // http://ejohn.org/blog/objectgetprototypeof/
    // recommended by fschaefer on github
    Object.getPrototypeOf = function getPrototypeOf(object) {
        return object.__proto__ || (
            object.constructor
                ? object.constructor.prototype
                : prototypeOfObject
        );
    };
}

// ES5 15.2.3.3
// http://es5.github.com/#x15.2.3.3
if (!Object.getOwnPropertyDescriptor) {
    var ERR_NON_OBJECT = "Object.getOwnPropertyDescriptor called on a non-object: ";

    Object.getOwnPropertyDescriptor = function getOwnPropertyDescriptor(object, property) {
        if ((typeof object != "object" && typeof object != "function") || object === null) {
            throw new TypeError(ERR_NON_OBJECT + object);
        }
        // If object does not owns property return undefined immediately.
        if (!owns(object, property)) {
            return;
        }

        // If object has a property then it's for sure both `enumerable` and
        // `configurable`.
        var descriptor =  { enumerable: true, configurable: true };

        // If JS engine supports accessor properties then property may be a
        // getter or setter.
        if (supportsAccessors) {
            // Unfortunately `__lookupGetter__` will return a getter even
            // if object has own non getter property along with a same named
            // inherited getter. To avoid misbehavior we temporary remove
            // `__proto__` so that `__lookupGetter__` will return getter only
            // if it's owned by an object.
            var prototype = object.__proto__;
            object.__proto__ = prototypeOfObject;

            var getter = lookupGetter(object, property);
            var setter = lookupSetter(object, property);

            // Once we have getter and setter we can put values back.
            object.__proto__ = prototype;

            if (getter || setter) {
                if (getter) {
                    descriptor.get = getter;
                }
                if (setter) {
                    descriptor.set = setter;
                }
                // If it was accessor property we're done and return here
                // in order to avoid adding `value` to the descriptor.
                return descriptor;
            }
        }

        // If we got this far we know that object has an own property that is
        // not an accessor so we set it as a value and return descriptor.
        descriptor.value = object[property];
        return descriptor;
    };
}

// ES5 15.2.3.4
// http://es5.github.com/#x15.2.3.4
if (!Object.getOwnPropertyNames) {
    Object.getOwnPropertyNames = function getOwnPropertyNames(object) {
        return Object.keys(object);
    };
}

// ES5 15.2.3.5
// http://es5.github.com/#x15.2.3.5
if (!Object.create) {
    Object.create = function create(prototype, properties) {
        var object;
        if (prototype === null) {
            object = { "__proto__": null };
        } else {
            if (typeof prototype != "object") {
                throw new TypeError("typeof prototype["+(typeof prototype)+"] != 'object'");
            }
            var Type = function () {};
            Type.prototype = prototype;
            object = new Type();
            // IE has no built-in implementation of `Object.getPrototypeOf`
            // neither `__proto__`, but this manually setting `__proto__` will
            // guarantee that `Object.getPrototypeOf` will work as expected with
            // objects created using `Object.create`
            object.__proto__ = prototype;
        }
        if (properties !== void 0) {
            Object.defineProperties(object, properties);
        }
        return object;
    };
}

// ES5 15.2.3.6
// http://es5.github.com/#x15.2.3.6

// Patch for WebKit and IE8 standard mode
// Designed by hax <hax.github.com>
// related issue: https://github.com/kriskowal/es5-shim/issues#issue/5
// IE8 Reference:
//     http://msdn.microsoft.com/en-us/library/dd282900.aspx
//     http://msdn.microsoft.com/en-us/library/dd229916.aspx
// WebKit Bugs:
//     https://bugs.webkit.org/show_bug.cgi?id=36423

function doesDefinePropertyWork(object) {
    try {
        Object.defineProperty(object, "sentinel", {});
        return "sentinel" in object;
    } catch (exception) {
        // returns falsy
    }
}

// check whether defineProperty works if it's given. Otherwise,
// shim partially.
if (Object.defineProperty) {
    var definePropertyWorksOnObject = doesDefinePropertyWork({});
    var definePropertyWorksOnDom = typeof document == "undefined" ||
        doesDefinePropertyWork(document.createElement("div"));
    if (!definePropertyWorksOnObject || !definePropertyWorksOnDom) {
        var definePropertyFallback = Object.defineProperty;
    }
}

if (!Object.defineProperty || definePropertyFallback) {
    var ERR_NON_OBJECT_DESCRIPTOR = "Property description must be an object: ";
    var ERR_NON_OBJECT_TARGET = "Object.defineProperty called on non-object: "
    var ERR_ACCESSORS_NOT_SUPPORTED = "getters & setters can not be defined " +
                                      "on this javascript engine";

    Object.defineProperty = function defineProperty(object, property, descriptor) {
        if ((typeof object != "object" && typeof object != "function") || object === null) {
            throw new TypeError(ERR_NON_OBJECT_TARGET + object);
        }
        if ((typeof descriptor != "object" && typeof descriptor != "function") || descriptor === null) {
            throw new TypeError(ERR_NON_OBJECT_DESCRIPTOR + descriptor);
        }
        // make a valiant attempt to use the real defineProperty
        // for I8's DOM elements.
        if (definePropertyFallback) {
            try {
                return definePropertyFallback.call(Object, object, property, descriptor);
            } catch (exception) {
                // try the shim if the real one doesn't work
            }
        }

        // If it's a data property.
        if (owns(descriptor, "value")) {
            // fail silently if "writable", "enumerable", or "configurable"
            // are requested but not supported
            /*
            // alternate approach:
            if ( // can't implement these features; allow false but not true
                !(owns(descriptor, "writable") ? descriptor.writable : true) ||
                !(owns(descriptor, "enumerable") ? descriptor.enumerable : true) ||
                !(owns(descriptor, "configurable") ? descriptor.configurable : true)
            )
                throw new RangeError(
                    "This implementation of Object.defineProperty does not " +
                    "support configurable, enumerable, or writable."
                );
            */

            if (supportsAccessors && (lookupGetter(object, property) ||
                                      lookupSetter(object, property)))
            {
                // As accessors are supported only on engines implementing
                // `__proto__` we can safely override `__proto__` while defining
                // a property to make sure that we don't hit an inherited
                // accessor.
                var prototype = object.__proto__;
                object.__proto__ = prototypeOfObject;
                // Deleting a property anyway since getter / setter may be
                // defined on object itself.
                delete object[property];
                object[property] = descriptor.value;
                // Setting original `__proto__` back now.
                object.__proto__ = prototype;
            } else {
                object[property] = descriptor.value;
            }
        } else {
            if (!supportsAccessors) {
                throw new TypeError(ERR_ACCESSORS_NOT_SUPPORTED);
            }
            // If we got that far then getters and setters can be defined !!
            if (owns(descriptor, "get")) {
                defineGetter(object, property, descriptor.get);
            }
            if (owns(descriptor, "set")) {
                defineSetter(object, property, descriptor.set);
            }
        }
        return object;
    };
}

// ES5 15.2.3.7
// http://es5.github.com/#x15.2.3.7
if (!Object.defineProperties) {
    Object.defineProperties = function defineProperties(object, properties) {
        for (var property in properties) {
            if (owns(properties, property) && property != "__proto__") {
                Object.defineProperty(object, property, properties[property]);
            }
        }
        return object;
    };
}

// ES5 15.2.3.8
// http://es5.github.com/#x15.2.3.8
if (!Object.seal) {
    Object.seal = function seal(object) {
        // this is misleading and breaks feature-detection, but
        // allows "securable" code to "gracefully" degrade to working
        // but insecure code.
        return object;
    };
}

// ES5 15.2.3.9
// http://es5.github.com/#x15.2.3.9
if (!Object.freeze) {
    Object.freeze = function freeze(object) {
        // this is misleading and breaks feature-detection, but
        // allows "securable" code to "gracefully" degrade to working
        // but insecure code.
        return object;
    };
}

// detect a Rhino bug and patch it
try {
    Object.freeze(function () {});
} catch (exception) {
    Object.freeze = (function freeze(freezeObject) {
        return function freeze(object) {
            if (typeof object == "function") {
                return object;
            } else {
                return freezeObject(object);
            }
        };
    })(Object.freeze);
}

// ES5 15.2.3.10
// http://es5.github.com/#x15.2.3.10
if (!Object.preventExtensions) {
    Object.preventExtensions = function preventExtensions(object) {
        // this is misleading and breaks feature-detection, but
        // allows "securable" code to "gracefully" degrade to working
        // but insecure code.
        return object;
    };
}

// ES5 15.2.3.11
// http://es5.github.com/#x15.2.3.11
if (!Object.isSealed) {
    Object.isSealed = function isSealed(object) {
        return false;
    };
}

// ES5 15.2.3.12
// http://es5.github.com/#x15.2.3.12
if (!Object.isFrozen) {
    Object.isFrozen = function isFrozen(object) {
        return false;
    };
}

// ES5 15.2.3.13
// http://es5.github.com/#x15.2.3.13
if (!Object.isExtensible) {
    Object.isExtensible = function isExtensible(object) {
        // 1. If Type(O) is not Object throw a TypeError exception.
        if (Object(object) !== object) {
            throw new TypeError(); // TODO message
        }
        // 2. Return the Boolean value of the [[Extensible]] internal property of O.
        var name = '';
        while (owns(object, name)) {
            name += '?';
        }
        object[name] = true;
        var returnValue = owns(object, name);
        delete object[name];
        return returnValue;
    };
}

// ES5 15.2.3.14
// http://es5.github.com/#x15.2.3.14
if (!Object.keys) {
    // http://whattheheadsaid.com/2010/10/a-safer-object-keys-compatibility-implementation
    var hasDontEnumBug = true,
        dontEnums = [
            "toString",
            "toLocaleString",
            "valueOf",
            "hasOwnProperty",
            "isPrototypeOf",
            "propertyIsEnumerable",
            "constructor"
        ],
        dontEnumsLength = dontEnums.length;

    for (var key in {"toString": null}) {
        hasDontEnumBug = false;
    }

    Object.keys = function keys(object) {

        if ((typeof object != "object" && typeof object != "function") || object === null) {
            throw new TypeError("Object.keys called on a non-object");
        }

        var keys = [];
        for (var name in object) {
            if (owns(object, name)) {
                keys.push(name);
            }
        }

        if (hasDontEnumBug) {
            for (var i = 0, ii = dontEnumsLength; i < ii; i++) {
                var dontEnum = dontEnums[i];
                if (owns(object, dontEnum)) {
                    keys.push(dontEnum);
                }
            }
        }
        return keys;
    };

}

//
// Date
// ====
//

// ES5 15.9.5.43
// http://es5.github.com/#x15.9.5.43
// This function returns a String value represent the instance in time
// represented by this Date object. The format of the String is the Date Time
// string format defined in 15.9.1.15. All fields are present in the String.
// The time zone is always UTC, denoted by the suffix Z. If the time value of
// this object is not a finite Number a RangeError exception is thrown.
if (!Date.prototype.toISOString || (new Date(-62198755200000).toISOString().indexOf('-000001') === -1)) {
    Date.prototype.toISOString = function toISOString() {
        var result, length, value, year;
        if (!isFinite(this)) {
            throw new RangeError("Date.prototype.toISOString called on non-finite value.");
        }

        // the date time string format is specified in 15.9.1.15.
        result = [this.getUTCMonth() + 1, this.getUTCDate(),
            this.getUTCHours(), this.getUTCMinutes(), this.getUTCSeconds()];
        year = this.getUTCFullYear();
        year = (year < 0 ? '-' : (year > 9999 ? '+' : '')) + ('00000' + Math.abs(year)).slice(0 <= year && year <= 9999 ? -4 : -6);

        length = result.length;
        while (length--) {
            value = result[length];
            // pad months, days, hours, minutes, and seconds to have two digits.
            if (value < 10) {
                result[length] = "0" + value;
            }
        }
        // pad milliseconds to have three digits.
        return year + "-" + result.slice(0, 2).join("-") + "T" + result.slice(2).join(":") + "." +
            ("000" + this.getUTCMilliseconds()).slice(-3) + "Z";
    }
}

// ES5 15.9.4.4
// http://es5.github.com/#x15.9.4.4
if (!Date.now) {
    Date.now = function now() {
        return new Date().getTime();
    };
}

// ES5 15.9.5.44
// http://es5.github.com/#x15.9.5.44
// This function provides a String representation of a Date object for use by
// JSON.stringify (15.12.3).
if (!Date.prototype.toJSON) {
    Date.prototype.toJSON = function toJSON(key) {
        // When the toJSON method is called with argument key, the following
        // steps are taken:

        // 1.  Let O be the result of calling ToObject, giving it the this
        // value as its argument.
        // 2. Let tv be ToPrimitive(O, hint Number).
        // 3. If tv is a Number and is not finite, return null.
        // XXX
        // 4. Let toISO be the result of calling the [[Get]] internal method of
        // O with argument "toISOString".
        // 5. If IsCallable(toISO) is false, throw a TypeError exception.
        if (typeof this.toISOString != "function") {
            throw new TypeError('toISOString property is not callable');
        }
        // 6. Return the result of calling the [[Call]] internal method of
        //  toISO with O as the this value and an empty argument list.
        return this.toISOString();

        // NOTE 1 The argument is ignored.

        // NOTE 2 The toJSON function is intentionally generic; it does not
        // require that its this value be a Date object. Therefore, it can be
        // transferred to other kinds of objects for use as a method. However,
        // it does require that any such object have a toISOString method. An
        // object is free to use the argument key to filter its
        // stringification.
    };
}

// ES5 15.9.4.2
// http://es5.github.com/#x15.9.4.2
// based on work shared by Daniel Friesen (dantman)
// http://gist.github.com/303249
if (!Date.parse || Date.parse("+275760-09-13T00:00:00.000Z") !== 8.64e15) {
    // XXX global assignment won't work in embeddings that use
    // an alternate object for the context.
    Date = (function(NativeDate) {

        // Date.length === 7
        var Date = function Date(Y, M, D, h, m, s, ms) {
            var length = arguments.length;
            if (this instanceof NativeDate) {
                var date = length == 1 && String(Y) === Y ? // isString(Y)
                    // We explicitly pass it through parse:
                    new NativeDate(Date.parse(Y)) :
                    // We have to manually make calls depending on argument
                    // length here
                    length >= 7 ? new NativeDate(Y, M, D, h, m, s, ms) :
                    length >= 6 ? new NativeDate(Y, M, D, h, m, s) :
                    length >= 5 ? new NativeDate(Y, M, D, h, m) :
                    length >= 4 ? new NativeDate(Y, M, D, h) :
                    length >= 3 ? new NativeDate(Y, M, D) :
                    length >= 2 ? new NativeDate(Y, M) :
                    length >= 1 ? new NativeDate(Y) :
                                  new NativeDate();
                // Prevent mixups with unfixed Date object
                date.constructor = Date;
                return date;
            }
            return NativeDate.apply(this, arguments);
        };

        // 15.9.1.15 Date Time String Format.
        var isoDateExpression = new RegExp("^" +
            "(\\d{4}|[\+\-]\\d{6})" + // four-digit year capture or sign + 6-digit extended year
            "(?:-(\\d{2})" + // optional month capture
            "(?:-(\\d{2})" + // optional day capture
            "(?:" + // capture hours:minutes:seconds.milliseconds
                "T(\\d{2})" + // hours capture
                ":(\\d{2})" + // minutes capture
                "(?:" + // optional :seconds.milliseconds
                    ":(\\d{2})" + // seconds capture
                    "(?:\\.(\\d{3}))?" + // milliseconds capture
                ")?" +
            "(?:" + // capture UTC offset component
                "Z|" + // UTC capture
                "(?:" + // offset specifier +/-hours:minutes
                    "([-+])" + // sign capture
                    "(\\d{2})" + // hours offset capture
                    ":(\\d{2})" + // minutes offset capture
                ")" +
            ")?)?)?)?" +
        "$");

        // Copy any custom methods a 3rd party library may have added
        for (var key in NativeDate) {
            Date[key] = NativeDate[key];
        }

        // Copy "native" methods explicitly; they may be non-enumerable
        Date.now = NativeDate.now;
        Date.UTC = NativeDate.UTC;
        Date.prototype = NativeDate.prototype;
        Date.prototype.constructor = Date;

        // Upgrade Date.parse to handle simplified ISO 8601 strings
        Date.parse = function parse(string) {
            var match = isoDateExpression.exec(string);
            if (match) {
                match.shift(); // kill match[0], the full match
                // parse months, days, hours, minutes, seconds, and milliseconds
                for (var i = 1; i < 7; i++) {
                    // provide default values if necessary
                    match[i] = +(match[i] || (i < 3 ? 1 : 0));
                    // match[1] is the month. Months are 0-11 in JavaScript
                    // `Date` objects, but 1-12 in ISO notation, so we
                    // decrement.
                    if (i == 1) {
                        match[i]--;
                    }
                }

                // parse the UTC offset component
                var minuteOffset = +match.pop(), hourOffset = +match.pop(), sign = match.pop();

                // compute the explicit time zone offset if specified
                var offset = 0;
                if (sign) {
                    // detect invalid offsets and return early
                    if (hourOffset > 23 || minuteOffset > 59) {
                        return NaN;
                    }

                    // express the provided time zone offset in minutes. The offset is
                    // negative for time zones west of UTC; positive otherwise.
                    offset = (hourOffset * 60 + minuteOffset) * 6e4 * (sign == "+" ? -1 : 1);
                }

                // Date.UTC for years between 0 and 99 converts year to 1900 + year
                // The Gregorian calendar has a 400-year cycle, so
                // to Date.UTC(year + 400, .... ) - 12622780800000 == Date.UTC(year, ...),
                // where 12622780800000 - number of milliseconds in Gregorian calendar 400 years
                var year = +match[0];
                if (0 <= year && year <= 99) {
                    match[0] = year + 400;
                    return NativeDate.UTC.apply(this, match) + offset - 12622780800000;
                }

                // compute a new UTC date value, accounting for the optional offset
                return NativeDate.UTC.apply(this, match) + offset;
            }
            return NativeDate.parse.apply(this, arguments);
        };

        return Date;
    })(Date);
}

//
// String
// ======
//

// ES5 15.5.4.20
// http://es5.github.com/#x15.5.4.20
var ws = "\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003" +
    "\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028" +
    "\u2029\uFEFF";
if (!String.prototype.trim || ws.trim()) {
    // http://blog.stevenlevithan.com/archives/faster-trim-javascript
    // http://perfectionkills.com/whitespace-deviations/
    ws = "[" + ws + "]";
    var trimBeginRegexp = new RegExp("^" + ws + ws + "*"),
        trimEndRegexp = new RegExp(ws + ws + "*$");
    String.prototype.trim = function trim() {
        if (this === undefined || this === null) {
            throw new TypeError("can't convert "+this+" to object");
        }
        return String(this).replace(trimBeginRegexp, "").replace(trimEndRegexp, "");
    };
}

//
// Util
// ======
//

// ES5 9.4
// http://es5.github.com/#x9.4
// http://jsperf.com/to-integer
var toInteger = function (n) {
    n = +n;
    if (n !== n) { // isNaN
        n = 0;
    } else if (n !== 0 && n !== (1/0) && n !== -(1/0)) {
        n = (n > 0 || -1) * Math.floor(Math.abs(n));
    }
    return n;
};

var prepareString = "a"[0] != "a";
    // ES5 9.9
    // http://es5.github.com/#x9.9
var toObject = function (o) {
    if (o == null) { // this matches both null and undefined
        throw new TypeError("can't convert "+o+" to object");
    }
    // If the implementation doesn't support by-index access of
    // string characters (ex. IE < 9), split the string
    if (prepareString && typeof o == "string" && o) {
        return o.split("");
    }
    return Object(o);
};
});
/**
 * @author mrdoob / http://mrdoob.com/
 * @author Larry Battle / http://bateru.com/news
 */

var THREE = THREE || { REVISION: '53' };

self.console = self.console || {

	info: function () {},
	log: function () {},
	debug: function () {},
	warn: function () {},
	error: function () {}

};

self.Int32Array = self.Int32Array || Array;
self.Float32Array = self.Float32Array || Array;

// Shims for "startsWith", "endsWith", and "trim" for browsers where this is not yet implemented
// not sure we should have this, or at least not have it here

// http://stackoverflow.com/questions/646628/javascript-startswith
// http://stackoverflow.com/questions/498970/how-do-i-trim-a-string-in-javascript
// http://wiki.ecmascript.org/doku.php?id=harmony%3astring_extras

String.prototype.startsWith = String.prototype.startsWith || function ( str ) {

	return this.slice( 0, str.length ) === str;

};

String.prototype.endsWith = String.prototype.endsWith || function ( str ) {

	var t = String( str );
	var index = this.lastIndexOf( t );
	return ( -1 < index && index ) === (this.length - t.length);

};

String.prototype.trim = String.prototype.trim || function () {

	return this.replace( /^\s+|\s+$/g, '' );

};


// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller
// fixes from Paul Irish and Tino Zijdel

( function () {

	var lastTime = 0;
	var vendors = [ 'ms', 'moz', 'webkit', 'o' ];

	for ( var x = 0; x < vendors.length && !window.requestAnimationFrame; ++ x ) {

		window.requestAnimationFrame = window[ vendors[ x ] + 'RequestAnimationFrame' ];
		window.cancelAnimationFrame = window[ vendors[ x ] + 'CancelAnimationFrame' ] || window[ vendors[ x ] + 'CancelRequestAnimationFrame' ];

	}

	if ( window.requestAnimationFrame === undefined ) {

		window.requestAnimationFrame = function ( callback, element ) {

			var currTime = Date.now(), timeToCall = Math.max( 0, 16 - ( currTime - lastTime ) );
			var id = window.setTimeout( function() { callback( currTime + timeToCall ); }, timeToCall );
			lastTime = currTime + timeToCall;
			return id;

		};

	}

	window.cancelAnimationFrame = window.cancelAnimationFrame || function ( id ) { window.clearTimeout( id ) };

}() );


// MATERIAL CONSTANTS

// side

THREE.FrontSide = 0;
THREE.BackSide = 1;
THREE.DoubleSide = 2;

// shading

THREE.NoShading = 0;
THREE.FlatShading = 1;
THREE.SmoothShading = 2;

// colors

THREE.NoColors = 0;
THREE.FaceColors = 1;
THREE.VertexColors = 2;

// blending modes

THREE.NoBlending = 0;
THREE.NormalBlending = 1;
THREE.AdditiveBlending = 2;
THREE.SubtractiveBlending = 3;
THREE.MultiplyBlending = 4;
THREE.CustomBlending = 5;

// custom blending equations
// (numbers start from 100 not to clash with other
//  mappings to OpenGL constants defined in Texture.js)

THREE.AddEquation = 100;
THREE.SubtractEquation = 101;
THREE.ReverseSubtractEquation = 102;

// custom blending destination factors

THREE.ZeroFactor = 200;
THREE.OneFactor = 201;
THREE.SrcColorFactor = 202;
THREE.OneMinusSrcColorFactor = 203;
THREE.SrcAlphaFactor = 204;
THREE.OneMinusSrcAlphaFactor = 205;
THREE.DstAlphaFactor = 206;
THREE.OneMinusDstAlphaFactor = 207;

// custom blending source factors

//THREE.ZeroFactor = 200;
//THREE.OneFactor = 201;
//THREE.SrcAlphaFactor = 204;
//THREE.OneMinusSrcAlphaFactor = 205;
//THREE.DstAlphaFactor = 206;
//THREE.OneMinusDstAlphaFactor = 207;
THREE.DstColorFactor = 208;
THREE.OneMinusDstColorFactor = 209;
THREE.SrcAlphaSaturateFactor = 210;


// TEXTURE CONSTANTS

THREE.MultiplyOperation = 0;
THREE.MixOperation = 1;
THREE.AddOperation = 2;

// Mapping modes

THREE.UVMapping = function () {};

THREE.CubeReflectionMapping = function () {};
THREE.CubeRefractionMapping = function () {};

THREE.SphericalReflectionMapping = function () {};
THREE.SphericalRefractionMapping = function () {};

// Wrapping modes

THREE.RepeatWrapping = 1000;
THREE.ClampToEdgeWrapping = 1001;
THREE.MirroredRepeatWrapping = 1002;

// Filters

THREE.NearestFilter = 1003;
THREE.NearestMipMapNearestFilter = 1004;
THREE.NearestMipMapLinearFilter = 1005;
THREE.LinearFilter = 1006;
THREE.LinearMipMapNearestFilter = 1007;
THREE.LinearMipMapLinearFilter = 1008;

// Data types

THREE.UnsignedByteType = 1009;
THREE.ByteType = 1010;
THREE.ShortType = 1011;
THREE.UnsignedShortType = 1012;
THREE.IntType = 1013;
THREE.UnsignedIntType = 1014;
THREE.FloatType = 1015;

// Pixel types

//THREE.UnsignedByteType = 1009;
THREE.UnsignedShort4444Type = 1016;
THREE.UnsignedShort5551Type = 1017;
THREE.UnsignedShort565Type = 1018;

// Pixel formats

THREE.AlphaFormat = 1019;
THREE.RGBFormat = 1020;
THREE.RGBAFormat = 1021;
THREE.LuminanceFormat = 1022;
THREE.LuminanceAlphaFormat = 1023;

// Compressed texture formats

THREE.RGB_S3TC_DXT1_Format = 2001;
THREE.RGBA_S3TC_DXT1_Format = 2002;
THREE.RGBA_S3TC_DXT3_Format = 2003;
THREE.RGBA_S3TC_DXT5_Format = 2004;

/*
// Potential future PVRTC compressed texture formats
THREE.RGB_PVRTC_4BPPV1_Format = 2100;
THREE.RGB_PVRTC_2BPPV1_Format = 2101;
THREE.RGBA_PVRTC_4BPPV1_Format = 2102;
THREE.RGBA_PVRTC_2BPPV1_Format = 2103;
*/
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Clock = function ( autoStart ) {

	this.autoStart = ( autoStart !== undefined ) ? autoStart : true;

	this.startTime = 0;
	this.oldTime = 0;
	this.elapsedTime = 0;

	this.running = false;

};

THREE.Clock.prototype.start = function () {

	this.startTime = Date.now();
	this.oldTime = this.startTime;

	this.running = true;

};

THREE.Clock.prototype.stop = function () {

	this.getElapsedTime();

	this.running = false;

};

THREE.Clock.prototype.getElapsedTime = function () {

	this.elapsedTime += this.getDelta();

	return this.elapsedTime;

};


THREE.Clock.prototype.getDelta = function () {

	var diff = 0;

	if ( this.autoStart && ! this.running ) {

		this.start();

	}

	if ( this.running ) {

		var newTime = Date.now();
		diff = 0.001 * ( newTime - this.oldTime );
		this.oldTime = newTime;

		this.elapsedTime += diff;

	}

	return diff;

};/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.Color = function ( hex ) {

	if ( hex !== undefined ) this.setHex( hex );

	return this;

};

THREE.Color.prototype = {

	constructor: THREE.Color,

	r: 1, g: 1, b: 1,

	copy: function ( color ) {

		this.r = color.r;
		this.g = color.g;
		this.b = color.b;

		return this;

	},

	copyGammaToLinear: function ( color ) {

		this.r = color.r * color.r;
		this.g = color.g * color.g;
		this.b = color.b * color.b;

		return this;

	},

	copyLinearToGamma: function ( color ) {

		this.r = Math.sqrt( color.r );
		this.g = Math.sqrt( color.g );
		this.b = Math.sqrt( color.b );

		return this;

	},

	convertGammaToLinear: function () {

		var r = this.r, g = this.g, b = this.b;

		this.r = r * r;
		this.g = g * g;
		this.b = b * b;

		return this;

	},

	convertLinearToGamma: function () {

		this.r = Math.sqrt( this.r );
		this.g = Math.sqrt( this.g );
		this.b = Math.sqrt( this.b );

		return this;

	},

	setRGB: function ( r, g, b ) {

		this.r = r;
		this.g = g;
		this.b = b;

		return this;

	},

	setHSV: function ( h, s, v ) {

		// based on MochiKit implementation by Bob Ippolito
		// h,s,v ranges are < 0.0 - 1.0 >

		var i, f, p, q, t;

		if ( v === 0 ) {

			this.r = this.g = this.b = 0;

		} else {

			i = Math.floor( h * 6 );
			f = ( h * 6 ) - i;
			p = v * ( 1 - s );
			q = v * ( 1 - ( s * f ) );
			t = v * ( 1 - ( s * ( 1 - f ) ) );

			if ( i === 0 ) {

				this.r = v;
				this.g = t;
				this.b = p;

			} else if ( i === 1 ) {

				this.r = q;
				this.g = v;
				this.b = p;

			} else if ( i === 2 ) {

				this.r = p;
				this.g = v;
				this.b = t;

			} else if ( i === 3 ) {

				this.r = p;
				this.g = q;
				this.b = v;

			} else if ( i === 4 ) {

				this.r = t;
				this.g = p;
				this.b = v;

			} else if ( i === 5 ) {

				this.r = v;
				this.g = p;
				this.b = q;

			}

		}

		return this;

	},

	getHex: function () {

		return ( this.r * 255 ) << 16 ^ ( this.g * 255 ) << 8 ^ ( this.b * 255 ) << 0;

	},

	setHex: function ( hex ) {

		hex = Math.floor( hex );

		this.r = ( hex >> 16 & 255 ) / 255;
		this.g = ( hex >> 8 & 255 ) / 255;
		this.b = ( hex & 255 ) / 255;

		return this;

	},

	getHexString: function () {

		return ( '000000' + this.getHex().toString( 16 ) ).slice( - 6 );

	},

	getContextStyle: function () {

		return 'rgb(' + ( ( this.r * 255 ) | 0 )  + ',' + ( ( this.g * 255 ) | 0 ) + ',' + ( ( this.b * 255 ) | 0 ) + ')';

	},

	setContextStyle: function ( style ) {

		var color = /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/i.exec( style );

		this.r = parseInt( color[ 1 ], 10 ) / 255;
		this.g = parseInt( color[ 2 ], 10 ) / 255;
		this.b = parseInt( color[ 3 ], 10 ) / 255;

		return this;

	},

	getHSV: function ( hsv ) {

		// based on MochiKit implementation by Bob Ippolito
		// h,s,v ranges are < 0.0 - 1.0 >

		var r = this.r;
		var g = this.g;
		var b = this.b;

		var max = Math.max( Math.max( r, g ), b );
		var min = Math.min( Math.min( r, g ), b );

		var hue;
		var saturation;
		var value = max;

		if ( min === max )	{

			hue = 0;
			saturation = 0;

		} else {

			var delta = ( max - min );
			saturation = delta / max;

			if ( r === max ) {

				hue = ( g - b ) / delta;

			} else if ( g === max ) {

				hue = 2 + ( ( b - r ) / delta );

			} else	{

				hue = 4 + ( ( r - g ) / delta );
			}

			hue /= 6;

			if ( hue < 0 ) {

				hue += 1;

			}

			if ( hue > 1 ) {

				hue -= 1;

			}

		}

		if ( hsv === undefined ) {

			hsv = { h: 0, s: 0, v: 0 };

		}

		hsv.h = hue;
		hsv.s = saturation;
		hsv.v = value;

		return hsv;

	},

	lerpSelf: function ( color, alpha ) {

		this.r += ( color.r - this.r ) * alpha;
		this.g += ( color.g - this.g ) * alpha;
		this.b += ( color.b - this.b ) * alpha;

		return this;

	},

	clone: function () {

		return new THREE.Color().setRGB( this.r, this.g, this.b );

	}

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author philogb / http://blog.thejit.org/
 * @author egraether / http://egraether.com/
 * @author zz85 / http://www.lab4games.net/zz85/blog
 */

THREE.Vector2 = function ( x, y ) {

	this.x = x || 0;
	this.y = y || 0;

};

THREE.Vector2.prototype = {

	constructor: THREE.Vector2,

	set: function ( x, y ) {

		this.x = x;
		this.y = y;

		return this;

	},

	copy: function ( v ) {

		this.x = v.x;
		this.y = v.y;

		return this;

	},

	add: function ( a, b ) {

		this.x = a.x + b.x;
		this.y = a.y + b.y;

		return this;

	},

	addSelf: function ( v ) {

		this.x += v.x;
		this.y += v.y;

		return this;

	},

	sub: function ( a, b ) {

		this.x = a.x - b.x;
		this.y = a.y - b.y;

		return this;

	},

	subSelf: function ( v ) {

		this.x -= v.x;
		this.y -= v.y;

		return this;

	},

	multiplyScalar: function ( s ) {

		this.x *= s;
		this.y *= s;

		return this;

	},

	divideScalar: function ( s ) {

		if ( s ) {

			this.x /= s;
			this.y /= s;

		} else {

			this.set( 0, 0 );

		}

		return this;

	},

	negate: function() {

		return this.multiplyScalar( - 1 );

	},

	dot: function ( v ) {

		return this.x * v.x + this.y * v.y;

	},

	lengthSq: function () {

		return this.x * this.x + this.y * this.y;

	},

	length: function () {

		return Math.sqrt( this.lengthSq() );

	},

	normalize: function () {

		return this.divideScalar( this.length() );

	},

	distanceTo: function ( v ) {

		return Math.sqrt( this.distanceToSquared( v ) );

	},

	distanceToSquared: function ( v ) {

		var dx = this.x - v.x, dy = this.y - v.y;
		return dx * dx + dy * dy;

	},

	setLength: function ( l ) {

		return this.normalize().multiplyScalar( l );

	},

	lerpSelf: function ( v, alpha ) {

		this.x += ( v.x - this.x ) * alpha;
		this.y += ( v.y - this.y ) * alpha;

		return this;

	},

	equals: function( v ) {

		return ( ( v.x === this.x ) && ( v.y === this.y ) );

	},

	clone: function () {

		return new THREE.Vector2( this.x, this.y );

	}

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author kile / http://kile.stravaganza.org/
 * @author philogb / http://blog.thejit.org/
 * @author mikael emtinger / http://gomo.se/
 * @author egraether / http://egraether.com/
 * @author WestLangley / http://github.com/WestLangley
 */

THREE.Vector3 = function ( x, y, z ) {

	this.x = x || 0;
	this.y = y || 0;
	this.z = z || 0;

};


THREE.Vector3.prototype = {

	constructor: THREE.Vector3,

	set: function ( x, y, z ) {

		this.x = x;
		this.y = y;
		this.z = z;

		return this;

	},

	setX: function ( x ) {

		this.x = x;

		return this;

	},

	setY: function ( y ) {

		this.y = y;

		return this;

	},

	setZ: function ( z ) {

		this.z = z;

		return this;

	},

	copy: function ( v ) {

		this.x = v.x;
		this.y = v.y;
		this.z = v.z;

		return this;

	},

	add: function ( a, b ) {

		this.x = a.x + b.x;
		this.y = a.y + b.y;
		this.z = a.z + b.z;

		return this;

	},

	addSelf: function ( v ) {

		this.x += v.x;
		this.y += v.y;
		this.z += v.z;

		return this;

	},

	addScalar: function ( s ) {

		this.x += s;
		this.y += s;
		this.z += s;

		return this;

	},

	sub: function ( a, b ) {

		this.x = a.x - b.x;
		this.y = a.y - b.y;
		this.z = a.z - b.z;

		return this;

	},

	subSelf: function ( v ) {

		this.x -= v.x;
		this.y -= v.y;
		this.z -= v.z;

		return this;

	},

	multiply: function ( a, b ) {

		this.x = a.x * b.x;
		this.y = a.y * b.y;
		this.z = a.z * b.z;

		return this;

	},

	multiplySelf: function ( v ) {

		this.x *= v.x;
		this.y *= v.y;
		this.z *= v.z;

		return this;

	},

	multiplyScalar: function ( s ) {

		this.x *= s;
		this.y *= s;
		this.z *= s;

		return this;

	},

	divideSelf: function ( v ) {

		this.x /= v.x;
		this.y /= v.y;
		this.z /= v.z;

		return this;

	},

	divideScalar: function ( s ) {

		if ( s ) {

			this.x /= s;
			this.y /= s;
			this.z /= s;

		} else {

			this.x = 0;
			this.y = 0;
			this.z = 0;

		}

		return this;

	},


	negate: function() {

		return this.multiplyScalar( - 1 );

	},

	dot: function ( v ) {

		return this.x * v.x + this.y * v.y + this.z * v.z;

	},

	lengthSq: function () {

		return this.x * this.x + this.y * this.y + this.z * this.z;

	},

	length: function () {

		return Math.sqrt( this.lengthSq() );

	},

	lengthManhattan: function () {

		return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z );

	},

	normalize: function () {

		return this.divideScalar( this.length() );

	},

	setLength: function ( l ) {

		return this.normalize().multiplyScalar( l );

	},

	lerpSelf: function ( v, alpha ) {

		this.x += ( v.x - this.x ) * alpha;
		this.y += ( v.y - this.y ) * alpha;
		this.z += ( v.z - this.z ) * alpha;

		return this;

	},

	cross: function ( a, b ) {

		this.x = a.y * b.z - a.z * b.y;
		this.y = a.z * b.x - a.x * b.z;
		this.z = a.x * b.y - a.y * b.x;

		return this;

	},

	crossSelf: function ( v ) {

		var x = this.x, y = this.y, z = this.z;

		this.x = y * v.z - z * v.y;
		this.y = z * v.x - x * v.z;
		this.z = x * v.y - y * v.x;

		return this;

	},

	angleTo: function ( v ) {

		return Math.acos( this.dot( v ) / this.length() / v.length() );

	},

	distanceTo: function ( v ) {

		return Math.sqrt( this.distanceToSquared( v ) );

	},

	distanceToSquared: function ( v ) {

		return new THREE.Vector3().sub( this, v ).lengthSq();

	},

	getPositionFromMatrix: function ( m ) {

		this.x = m.elements[12];
		this.y = m.elements[13];
		this.z = m.elements[14];

		return this;

	},

	setEulerFromRotationMatrix: function ( m, order ) {

		// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

		// clamp, to handle numerical problems

		function clamp( x ) {

			return Math.min( Math.max( x, -1 ), 1 );

		}

		var te = m.elements;
		var m11 = te[0], m12 = te[4], m13 = te[8];
		var m21 = te[1], m22 = te[5], m23 = te[9];
		var m31 = te[2], m32 = te[6], m33 = te[10];

		if ( order === undefined || order === 'XYZ' ) {

			this.y = Math.asin( clamp( m13 ) );

			if ( Math.abs( m13 ) < 0.99999 ) {

				this.x = Math.atan2( - m23, m33 );
				this.z = Math.atan2( - m12, m11 );

			} else {

				this.x = Math.atan2( m32, m22 );
				this.z = 0;

			}

		} else if ( order === 'YXZ' ) {

			this.x = Math.asin( - clamp( m23 ) );

			if ( Math.abs( m23 ) < 0.99999 ) {

				this.y = Math.atan2( m13, m33 );
				this.z = Math.atan2( m21, m22 );

			} else {

				this.y = Math.atan2( - m31, m11 );
				this.z = 0;

			}

		} else if ( order === 'ZXY' ) {

			this.x = Math.asin( clamp( m32 ) );

			if ( Math.abs( m32 ) < 0.99999 ) {

				this.y = Math.atan2( - m31, m33 );
				this.z = Math.atan2( - m12, m22 );

			} else {

				this.y = 0;
				this.z = Math.atan2( m21, m11 );

			}

		} else if ( order === 'ZYX' ) {

			this.y = Math.asin( - clamp( m31 ) );

			if ( Math.abs( m31 ) < 0.99999 ) {

				this.x = Math.atan2( m32, m33 );
				this.z = Math.atan2( m21, m11 );

			} else {

				this.x = 0;
				this.z = Math.atan2( - m12, m22 );

			}

		} else if ( order === 'YZX' ) {

			this.z = Math.asin( clamp( m21 ) );

			if ( Math.abs( m21 ) < 0.99999 ) {

				this.x = Math.atan2( - m23, m22 );
				this.y = Math.atan2( - m31, m11 );

			} else {

				this.x = 0;
				this.y = Math.atan2( m13, m33 );

			}

		} else if ( order === 'XZY' ) {

			this.z = Math.asin( - clamp( m12 ) );

			if ( Math.abs( m12 ) < 0.99999 ) {

				this.x = Math.atan2( m32, m22 );
				this.y = Math.atan2( m13, m11 );

			} else {

				this.x = Math.atan2( - m23, m33 );
				this.y = 0;

			}

		}

		return this;

	},

	setEulerFromQuaternion: function ( q, order ) {

		// q is assumed to be normalized

		// clamp, to handle numerical problems

		function clamp( x ) {

			return Math.min( Math.max( x, -1 ), 1 );

		}

		// http://www.mathworks.com/matlabcentral/fileexchange/20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/content/SpinCalc.m

		var sqx = q.x * q.x;
		var sqy = q.y * q.y;
		var sqz = q.z * q.z;
		var sqw = q.w * q.w;

		if ( order === undefined || order === 'XYZ' ) {

			this.x = Math.atan2( 2 * ( q.x * q.w - q.y * q.z ), ( sqw - sqx - sqy + sqz ) );
			this.y = Math.asin(  clamp( 2 * ( q.x * q.z + q.y * q.w ) ) );
			this.z = Math.atan2( 2 * ( q.z * q.w - q.x * q.y ), ( sqw + sqx - sqy - sqz ) );

		} else if ( order ===  'YXZ' ) {

			this.x = Math.asin(  clamp( 2 * ( q.x * q.w - q.y * q.z ) ) );
			this.y = Math.atan2( 2 * ( q.x * q.z + q.y * q.w ), ( sqw - sqx - sqy + sqz ) );
			this.z = Math.atan2( 2 * ( q.x * q.y + q.z * q.w ), ( sqw - sqx + sqy - sqz ) );

		} else if ( order === 'ZXY' ) {

			this.x = Math.asin(  clamp( 2 * ( q.x * q.w + q.y * q.z ) ) );
			this.y = Math.atan2( 2 * ( q.y * q.w - q.z * q.x ), ( sqw - sqx - sqy + sqz ) );
			this.z = Math.atan2( 2 * ( q.z * q.w - q.x * q.y ), ( sqw - sqx + sqy - sqz ) );

		} else if ( order === 'ZYX' ) {

			this.x = Math.atan2( 2 * ( q.x * q.w + q.z * q.y ), ( sqw - sqx - sqy + sqz ) );
			this.y = Math.asin(  clamp( 2 * ( q.y * q.w - q.x * q.z ) ) );
			this.z = Math.atan2( 2 * ( q.x * q.y + q.z * q.w ), ( sqw + sqx - sqy - sqz ) );

		} else if ( order === 'YZX' ) {

			this.x = Math.atan2( 2 * ( q.x * q.w - q.z * q.y ), ( sqw - sqx + sqy - sqz ) );
			this.y = Math.atan2( 2 * ( q.y * q.w - q.x * q.z ), ( sqw + sqx - sqy - sqz ) );
			this.z = Math.asin(  clamp( 2 * ( q.x * q.y + q.z * q.w ) ) );

		} else if ( order === 'XZY' ) {

			this.x = Math.atan2( 2 * ( q.x * q.w + q.y * q.z ), ( sqw - sqx + sqy - sqz ) );
			this.y = Math.atan2( 2 * ( q.x * q.z + q.y * q.w ), ( sqw + sqx - sqy - sqz ) );
			this.z = Math.asin(  clamp( 2 * ( q.z * q.w - q.x * q.y ) ) );

		}

		return this;

	},

	getScaleFromMatrix: function ( m ) {

		var sx = this.set( m.elements[0], m.elements[1], m.elements[2] ).length();
		var sy = this.set( m.elements[4], m.elements[5], m.elements[6] ).length();
		var sz = this.set( m.elements[8], m.elements[9], m.elements[10] ).length();

		this.x = sx;
		this.y = sy;
		this.z = sz;

		return this;
	},

	equals: function ( v ) {

		return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) );

	},

	clone: function () {

		return new THREE.Vector3( this.x, this.y, this.z );

	}

};
/**
 * @author supereggbert / http://www.paulbrunt.co.uk/
 * @author philogb / http://blog.thejit.org/
 * @author mikael emtinger / http://gomo.se/
 * @author egraether / http://egraether.com/
 * @author WestLangley / http://github.com/WestLangley
 */

THREE.Vector4 = function ( x, y, z, w ) {

	this.x = x || 0;
	this.y = y || 0;
	this.z = z || 0;
	this.w = ( w !== undefined ) ? w : 1;

};

THREE.Vector4.prototype = {

	constructor: THREE.Vector4,

	set: function ( x, y, z, w ) {

		this.x = x;
		this.y = y;
		this.z = z;
		this.w = w;

		return this;

	},

	copy: function ( v ) {

		this.x = v.x;
		this.y = v.y;
		this.z = v.z;
		this.w = ( v.w !== undefined ) ? v.w : 1;

		return this;

	},

	add: function ( a, b ) {

		this.x = a.x + b.x;
		this.y = a.y + b.y;
		this.z = a.z + b.z;
		this.w = a.w + b.w;

		return this;

	},

	addSelf: function ( v ) {

		this.x += v.x;
		this.y += v.y;
		this.z += v.z;
		this.w += v.w;

		return this;

	},

	sub: function ( a, b ) {

		this.x = a.x - b.x;
		this.y = a.y - b.y;
		this.z = a.z - b.z;
		this.w = a.w - b.w;

		return this;

	},

	subSelf: function ( v ) {

		this.x -= v.x;
		this.y -= v.y;
		this.z -= v.z;
		this.w -= v.w;

		return this;

	},

	multiplyScalar: function ( s ) {

		this.x *= s;
		this.y *= s;
		this.z *= s;
		this.w *= s;

		return this;

	},

	divideScalar: function ( s ) {

		if ( s ) {

			this.x /= s;
			this.y /= s;
			this.z /= s;
			this.w /= s;

		} else {

			this.x = 0;
			this.y = 0;
			this.z = 0;
			this.w = 1;

		}

		return this;

	},


	negate: function() {

		return this.multiplyScalar( -1 );

	},

	dot: function ( v ) {

		return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;

	},

	lengthSq: function () {

		return this.dot( this );

	},

	length: function () {

		return Math.sqrt( this.lengthSq() );

	},

	lengthManhattan: function () {

		return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z ) + Math.abs( this.w );

	},

	normalize: function () {

		return this.divideScalar( this.length() );

	},

	setLength: function ( l ) {

		return this.normalize().multiplyScalar( l );

	},

	lerpSelf: function ( v, alpha ) {

		this.x += ( v.x - this.x ) * alpha;
		this.y += ( v.y - this.y ) * alpha;
		this.z += ( v.z - this.z ) * alpha;
		this.w += ( v.w - this.w ) * alpha;

		return this;

	},

	clone: function () {

		return new THREE.Vector4( this.x, this.y, this.z, this.w );

	},

	setAxisAngleFromQuaternion: function ( q ) {

		// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm

		// q is assumed to be normalized

		this.w = 2 * Math.acos( q.w );

		var s = Math.sqrt( 1 - q.w * q.w );

		if ( s < 0.0001 ) {

			 this.x = 1;
			 this.y = 0;
			 this.z = 0;

		} else {

			 this.x = q.x / s;
			 this.y = q.y / s;
			 this.z = q.z / s;

		}

		return this;

	},

	setAxisAngleFromRotationMatrix: function ( m ) {

		// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm

		// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

		var angle, x, y, z,		// variables for result
			epsilon = 0.01,		// margin to allow for rounding errors
			epsilon2 = 0.1,		// margin to distinguish between 0 and 180 degrees

			te = m.elements,

			m11 = te[0], m12 = te[4], m13 = te[8],
			m21 = te[1], m22 = te[5], m23 = te[9],
			m31 = te[2], m32 = te[6], m33 = te[10];

		if ( ( Math.abs( m12 - m21 ) < epsilon )
		  && ( Math.abs( m13 - m31 ) < epsilon )
		  && ( Math.abs( m23 - m32 ) < epsilon ) ) {

			// singularity found
			// first check for identity matrix which must have +1 for all terms
			// in leading diagonal and zero in other terms

			if ( ( Math.abs( m12 + m21 ) < epsilon2 )
			  && ( Math.abs( m13 + m31 ) < epsilon2 )
			  && ( Math.abs( m23 + m32 ) < epsilon2 )
			  && ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {

				// this singularity is identity matrix so angle = 0

				this.set( 1, 0, 0, 0 );

				return this; // zero angle, arbitrary axis

			}

			// otherwise this singularity is angle = 180

			angle = Math.PI;

			var xx = ( m11 + 1 ) / 2;
			var yy = ( m22 + 1 ) / 2;
			var zz = ( m33 + 1 ) / 2;
			var xy = ( m12 + m21 ) / 4;
			var xz = ( m13 + m31 ) / 4;
			var yz = ( m23 + m32 ) / 4;

			if ( ( xx > yy ) && ( xx > zz ) ) { // m11 is the largest diagonal term

				if ( xx < epsilon ) {

					x = 0;
					y = 0.707106781;
					z = 0.707106781;

				} else {

					x = Math.sqrt( xx );
					y = xy / x;
					z = xz / x;

				}

			} else if ( yy > zz ) { // m22 is the largest diagonal term

				if ( yy < epsilon ) {

					x = 0.707106781;
					y = 0;
					z = 0.707106781;

				} else {

					y = Math.sqrt( yy );
					x = xy / y;
					z = yz / y;

				}

			} else { // m33 is the largest diagonal term so base result on this

				if ( zz < epsilon ) {

					x = 0.707106781;
					y = 0.707106781;
					z = 0;

				} else {

					z = Math.sqrt( zz );
					x = xz / z;
					y = yz / z;

				}

			}

			this.set( x, y, z, angle );

			return this; // return 180 deg rotation

		}

		// as we have reached here there are no singularities so we can handle normally

		var s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 )
						 + ( m13 - m31 ) * ( m13 - m31 )
						 + ( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize

		if ( Math.abs( s ) < 0.001 ) s = 1;

		// prevent divide by zero, should not happen if matrix is orthogonal and should be
		// caught by singularity test above, but I've left it in just in case

		this.x = ( m32 - m23 ) / s;
		this.y = ( m13 - m31 ) / s;
		this.z = ( m21 - m12 ) / s;
		this.w = Math.acos( ( m11 + m22 + m33 - 1 ) / 2 );

		return this;

	}

};
/**
 * @author alteredq / http://alteredqualia.com/
 * @author WestLangley / http://github.com/WestLangley
 */

THREE.Matrix3 = function () {

	this.elements = new Float32Array(9);

};

THREE.Matrix3.prototype = {

	constructor: THREE.Matrix3,

	multiplyVector3: function ( v ) {

		var te = this.elements;

		var vx = v.x, vy = v.y, vz = v.z;

		v.x = te[0] * vx + te[3] * vy + te[6] * vz;
		v.y = te[1] * vx + te[4] * vy + te[7] * vz;
		v.z = te[2] * vx + te[5] * vy + te[8] * vz;

		return v;

	},

	multiplyVector3Array: function ( a ) {

		var tmp = THREE.Matrix3.__v1;

		for ( var i = 0, il = a.length; i < il; i += 3 ) {

			tmp.x = a[ i ];
			tmp.y = a[ i + 1 ];
			tmp.z = a[ i + 2 ];

			this.multiplyVector3( tmp );

			a[ i ]     = tmp.x;
			a[ i + 1 ] = tmp.y;
			a[ i + 2 ] = tmp.z;

		}

		return a;

	},

	getInverse: function ( matrix ) {

		// input: THREE.Matrix4
		// ( based on http://code.google.com/p/webgl-mjs/ )

		var me = matrix.elements;

		var a11 =   me[10] * me[5] - me[6] * me[9];
		var a21 = - me[10] * me[1] + me[2] * me[9];
		var a31 =   me[6] * me[1] - me[2] * me[5];
		var a12 = - me[10] * me[4] + me[6] * me[8];
		var a22 =   me[10] * me[0] - me[2] * me[8];
		var a32 = - me[6] * me[0] + me[2] * me[4];
		var a13 =   me[9] * me[4] - me[5] * me[8];
		var a23 = - me[9] * me[0] + me[1] * me[8];
		var a33 =   me[5] * me[0] - me[1] * me[4];

		var det = me[0] * a11 + me[1] * a12 + me[2] * a13;

		// no inverse

		if ( det === 0 ) {

			console.warn( "Matrix3.getInverse(): determinant == 0" );

		}

		var idet = 1.0 / det;

		var m = this.elements;

		m[ 0 ] = idet * a11; m[ 1 ] = idet * a21; m[ 2 ] = idet * a31;
		m[ 3 ] = idet * a12; m[ 4 ] = idet * a22; m[ 5 ] = idet * a32;
		m[ 6 ] = idet * a13; m[ 7 ] = idet * a23; m[ 8 ] = idet * a33;

		return this;

	},


	transpose: function () {

		var tmp, m = this.elements;

		tmp = m[1]; m[1] = m[3]; m[3] = tmp;
		tmp = m[2]; m[2] = m[6]; m[6] = tmp;
		tmp = m[5]; m[5] = m[7]; m[7] = tmp;

		return this;

	},


	transposeIntoArray: function ( r ) {

		var m = this.m;

		r[ 0 ] = m[ 0 ];
		r[ 1 ] = m[ 3 ];
		r[ 2 ] = m[ 6 ];
		r[ 3 ] = m[ 1 ];
		r[ 4 ] = m[ 4 ];
		r[ 5 ] = m[ 7 ];
		r[ 6 ] = m[ 2 ];
		r[ 7 ] = m[ 5 ];
		r[ 8 ] = m[ 8 ];

		return this;

	}

};

THREE.Matrix3.__v1 = new THREE.Vector3();/**
 * @author mrdoob / http://mrdoob.com/
 * @author supereggbert / http://www.paulbrunt.co.uk/
 * @author philogb / http://blog.thejit.org/
 * @author jordi_ros / http://plattsoft.com
 * @author D1plo1d / http://github.com/D1plo1d
 * @author alteredq / http://alteredqualia.com/
 * @author mikael emtinger / http://gomo.se/
 * @author timknip / http://www.floorplanner.com/
 */


THREE.Matrix4 = function ( n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44 ) {

	this.elements = new Float32Array( 16 );

	this.set(

		( n11 !== undefined ) ? n11 : 1, n12 || 0, n13 || 0, n14 || 0,
		n21 || 0, ( n22 !== undefined ) ? n22 : 1, n23 || 0, n24 || 0,
		n31 || 0, n32 || 0, ( n33 !== undefined ) ? n33 : 1, n34 || 0,
		n41 || 0, n42 || 0, n43 || 0, ( n44 !== undefined ) ? n44 : 1

	);

};

THREE.Matrix4.prototype = {

	constructor: THREE.Matrix4,

	set: function ( n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44 ) {

		var te = this.elements;

		te[0] = n11; te[4] = n12; te[8] = n13; te[12] = n14;
		te[1] = n21; te[5] = n22; te[9] = n23; te[13] = n24;
		te[2] = n31; te[6] = n32; te[10] = n33; te[14] = n34;
		te[3] = n41; te[7] = n42; te[11] = n43; te[15] = n44;

		return this;

	},

	identity: function () {

		this.set(

			1, 0, 0, 0,
			0, 1, 0, 0,
			0, 0, 1, 0,
			0, 0, 0, 1

		);

		return this;

	},

	copy: function ( m ) {

		var me = m.elements;

		this.set(

			me[0], me[4], me[8], me[12],
			me[1], me[5], me[9], me[13],
			me[2], me[6], me[10], me[14],
			me[3], me[7], me[11], me[15]

		);

		return this;

	},

	lookAt: function ( eye, target, up ) {

		var te = this.elements;

		var x = THREE.Matrix4.__v1;
		var y = THREE.Matrix4.__v2;
		var z = THREE.Matrix4.__v3;

		z.sub( eye, target ).normalize();

		if ( z.length() === 0 ) {

			z.z = 1;

		}

		x.cross( up, z ).normalize();

		if ( x.length() === 0 ) {

			z.x += 0.0001;
			x.cross( up, z ).normalize();

		}

		y.cross( z, x );


		te[0] = x.x; te[4] = y.x; te[8] = z.x;
		te[1] = x.y; te[5] = y.y; te[9] = z.y;
		te[2] = x.z; te[6] = y.z; te[10] = z.z;

		return this;

	},

	multiply: function ( a, b ) {

		var ae = a.elements;
		var be = b.elements;
		var te = this.elements;

		var a11 = ae[0], a12 = ae[4], a13 = ae[8], a14 = ae[12];
		var a21 = ae[1], a22 = ae[5], a23 = ae[9], a24 = ae[13];
		var a31 = ae[2], a32 = ae[6], a33 = ae[10], a34 = ae[14];
		var a41 = ae[3], a42 = ae[7], a43 = ae[11], a44 = ae[15];

		var b11 = be[0], b12 = be[4], b13 = be[8], b14 = be[12];
		var b21 = be[1], b22 = be[5], b23 = be[9], b24 = be[13];
		var b31 = be[2], b32 = be[6], b33 = be[10], b34 = be[14];
		var b41 = be[3], b42 = be[7], b43 = be[11], b44 = be[15];

		te[0] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
		te[4] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
		te[8] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
		te[12] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;

		te[1] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
		te[5] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
		te[9] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
		te[13] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;

		te[2] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
		te[6] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
		te[10] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
		te[14] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;

		te[3] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
		te[7] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
		te[11] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
		te[15] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;

		return this;

	},

	multiplySelf: function ( m ) {

		return this.multiply( this, m );

	},

	multiplyToArray: function ( a, b, r ) {

		var te = this.elements;

		this.multiply( a, b );

		r[ 0 ] = te[0]; r[ 1 ] = te[1]; r[ 2 ] = te[2]; r[ 3 ] = te[3];
		r[ 4 ] = te[4]; r[ 5 ] = te[5]; r[ 6 ] = te[6]; r[ 7 ] = te[7];
		r[ 8 ]  = te[8]; r[ 9 ]  = te[9]; r[ 10 ] = te[10]; r[ 11 ] = te[11];
		r[ 12 ] = te[12]; r[ 13 ] = te[13]; r[ 14 ] = te[14]; r[ 15 ] = te[15];

		return this;

	},

	multiplyScalar: function ( s ) {

		var te = this.elements;

		te[0] *= s; te[4] *= s; te[8] *= s; te[12] *= s;
		te[1] *= s; te[5] *= s; te[9] *= s; te[13] *= s;
		te[2] *= s; te[6] *= s; te[10] *= s; te[14] *= s;
		te[3] *= s; te[7] *= s; te[11] *= s; te[15] *= s;

		return this;

	},

	multiplyVector3: function ( v ) {

		var te = this.elements;

		var vx = v.x, vy = v.y, vz = v.z;
		var d = 1 / ( te[3] * vx + te[7] * vy + te[11] * vz + te[15] );

		v.x = ( te[0] * vx + te[4] * vy + te[8] * vz + te[12] ) * d;
		v.y = ( te[1] * vx + te[5] * vy + te[9] * vz + te[13] ) * d;
		v.z = ( te[2] * vx + te[6] * vy + te[10] * vz + te[14] ) * d;

		return v;

	},

	multiplyVector4: function ( v ) {

		var te = this.elements;
		var vx = v.x, vy = v.y, vz = v.z, vw = v.w;

		v.x = te[0] * vx + te[4] * vy + te[8] * vz + te[12] * vw;
		v.y = te[1] * vx + te[5] * vy + te[9] * vz + te[13] * vw;
		v.z = te[2] * vx + te[6] * vy + te[10] * vz + te[14] * vw;
		v.w = te[3] * vx + te[7] * vy + te[11] * vz + te[15] * vw;

		return v;

	},

	multiplyVector3Array: function ( a ) {

		var tmp = THREE.Matrix4.__v1;

		for ( var i = 0, il = a.length; i < il; i += 3 ) {

			tmp.x = a[ i ];
			tmp.y = a[ i + 1 ];
			tmp.z = a[ i + 2 ];

			this.multiplyVector3( tmp );

			a[ i ]     = tmp.x;
			a[ i + 1 ] = tmp.y;
			a[ i + 2 ] = tmp.z;

		}

		return a;

	},

	rotateAxis: function ( v ) {

		var te = this.elements;
		var vx = v.x, vy = v.y, vz = v.z;

		v.x = vx * te[0] + vy * te[4] + vz * te[8];
		v.y = vx * te[1] + vy * te[5] + vz * te[9];
		v.z = vx * te[2] + vy * te[6] + vz * te[10];

		v.normalize();

		return v;

	},

	crossVector: function ( a ) {

		var te = this.elements;
		var v = new THREE.Vector4();

		v.x = te[0] * a.x + te[4] * a.y + te[8] * a.z + te[12] * a.w;
		v.y = te[1] * a.x + te[5] * a.y + te[9] * a.z + te[13] * a.w;
		v.z = te[2] * a.x + te[6] * a.y + te[10] * a.z + te[14] * a.w;

		v.w = ( a.w ) ? te[3] * a.x + te[7] * a.y + te[11] * a.z + te[15] * a.w : 1;

		return v;

	},

	determinant: function () {

		var te = this.elements;

		var n11 = te[0], n12 = te[4], n13 = te[8], n14 = te[12];
		var n21 = te[1], n22 = te[5], n23 = te[9], n24 = te[13];
		var n31 = te[2], n32 = te[6], n33 = te[10], n34 = te[14];
		var n41 = te[3], n42 = te[7], n43 = te[11], n44 = te[15];

		//TODO: make this more efficient
		//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )

		return (
			n14 * n23 * n32 * n41-
			n13 * n24 * n32 * n41-
			n14 * n22 * n33 * n41+
			n12 * n24 * n33 * n41+

			n13 * n22 * n34 * n41-
			n12 * n23 * n34 * n41-
			n14 * n23 * n31 * n42+
			n13 * n24 * n31 * n42+

			n14 * n21 * n33 * n42-
			n11 * n24 * n33 * n42-
			n13 * n21 * n34 * n42+
			n11 * n23 * n34 * n42+

			n14 * n22 * n31 * n43-
			n12 * n24 * n31 * n43-
			n14 * n21 * n32 * n43+
			n11 * n24 * n32 * n43+

			n12 * n21 * n34 * n43-
			n11 * n22 * n34 * n43-
			n13 * n22 * n31 * n44+
			n12 * n23 * n31 * n44+

			n13 * n21 * n32 * n44-
			n11 * n23 * n32 * n44-
			n12 * n21 * n33 * n44+
			n11 * n22 * n33 * n44
		);

	},

	transpose: function () {

		var te = this.elements;
		var tmp;

		tmp = te[1]; te[1] = te[4]; te[4] = tmp;
		tmp = te[2]; te[2] = te[8]; te[8] = tmp;
		tmp = te[6]; te[6] = te[9]; te[9] = tmp;

		tmp = te[3]; te[3] = te[12]; te[12] = tmp;
		tmp = te[7]; te[7] = te[13]; te[13] = tmp;
		tmp = te[11]; te[11] = te[14]; te[14] = tmp;

		return this;

	},

	flattenToArray: function ( flat ) {

		var te = this.elements;
		flat[ 0 ] = te[0]; flat[ 1 ] = te[1]; flat[ 2 ] = te[2]; flat[ 3 ] = te[3];
		flat[ 4 ] = te[4]; flat[ 5 ] = te[5]; flat[ 6 ] = te[6]; flat[ 7 ] = te[7];
		flat[ 8 ]  = te[8]; flat[ 9 ]  = te[9]; flat[ 10 ] = te[10]; flat[ 11 ] = te[11];
		flat[ 12 ] = te[12]; flat[ 13 ] = te[13]; flat[ 14 ] = te[14]; flat[ 15 ] = te[15];

		return flat;

	},

	flattenToArrayOffset: function( flat, offset ) {

		var te = this.elements;
		flat[ offset ] = te[0];
		flat[ offset + 1 ] = te[1];
		flat[ offset + 2 ] = te[2];
		flat[ offset + 3 ] = te[3];

		flat[ offset + 4 ] = te[4];
		flat[ offset + 5 ] = te[5];
		flat[ offset + 6 ] = te[6];
		flat[ offset + 7 ] = te[7];

		flat[ offset + 8 ]  = te[8];
		flat[ offset + 9 ]  = te[9];
		flat[ offset + 10 ] = te[10];
		flat[ offset + 11 ] = te[11];

		flat[ offset + 12 ] = te[12];
		flat[ offset + 13 ] = te[13];
		flat[ offset + 14 ] = te[14];
		flat[ offset + 15 ] = te[15];

		return flat;

	},

	getPosition: function () {

		var te = this.elements;
		return THREE.Matrix4.__v1.set( te[12], te[13], te[14] );

	},

	setPosition: function ( v ) {

		var te = this.elements;

		te[12] = v.x;
		te[13] = v.y;
		te[14] = v.z;

		return this;

	},

	getColumnX: function () {

		var te = this.elements;
		return THREE.Matrix4.__v1.set( te[0], te[1], te[2] );

	},

	getColumnY: function () {

		var te = this.elements;
		return THREE.Matrix4.__v1.set( te[4], te[5], te[6] );

	},

	getColumnZ: function() {

		var te = this.elements;
		return THREE.Matrix4.__v1.set( te[8], te[9], te[10] );

	},

	getInverse: function ( m ) {

		// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm
		var te = this.elements;
		var me = m.elements;

		var n11 = me[0], n12 = me[4], n13 = me[8], n14 = me[12];
		var n21 = me[1], n22 = me[5], n23 = me[9], n24 = me[13];
		var n31 = me[2], n32 = me[6], n33 = me[10], n34 = me[14];
		var n41 = me[3], n42 = me[7], n43 = me[11], n44 = me[15];

		te[0] = n23*n34*n42 - n24*n33*n42 + n24*n32*n43 - n22*n34*n43 - n23*n32*n44 + n22*n33*n44;
		te[4] = n14*n33*n42 - n13*n34*n42 - n14*n32*n43 + n12*n34*n43 + n13*n32*n44 - n12*n33*n44;
		te[8] = n13*n24*n42 - n14*n23*n42 + n14*n22*n43 - n12*n24*n43 - n13*n22*n44 + n12*n23*n44;
		te[12] = n14*n23*n32 - n13*n24*n32 - n14*n22*n33 + n12*n24*n33 + n13*n22*n34 - n12*n23*n34;
		te[1] = n24*n33*n41 - n23*n34*n41 - n24*n31*n43 + n21*n34*n43 + n23*n31*n44 - n21*n33*n44;
		te[5] = n13*n34*n41 - n14*n33*n41 + n14*n31*n43 - n11*n34*n43 - n13*n31*n44 + n11*n33*n44;
		te[9] = n14*n23*n41 - n13*n24*n41 - n14*n21*n43 + n11*n24*n43 + n13*n21*n44 - n11*n23*n44;
		te[13] = n13*n24*n31 - n14*n23*n31 + n14*n21*n33 - n11*n24*n33 - n13*n21*n34 + n11*n23*n34;
		te[2] = n22*n34*n41 - n24*n32*n41 + n24*n31*n42 - n21*n34*n42 - n22*n31*n44 + n21*n32*n44;
		te[6] = n14*n32*n41 - n12*n34*n41 - n14*n31*n42 + n11*n34*n42 + n12*n31*n44 - n11*n32*n44;
		te[10] = n12*n24*n41 - n14*n22*n41 + n14*n21*n42 - n11*n24*n42 - n12*n21*n44 + n11*n22*n44;
		te[14] = n14*n22*n31 - n12*n24*n31 - n14*n21*n32 + n11*n24*n32 + n12*n21*n34 - n11*n22*n34;
		te[3] = n23*n32*n41 - n22*n33*n41 - n23*n31*n42 + n21*n33*n42 + n22*n31*n43 - n21*n32*n43;
		te[7] = n12*n33*n41 - n13*n32*n41 + n13*n31*n42 - n11*n33*n42 - n12*n31*n43 + n11*n32*n43;
		te[11] = n13*n22*n41 - n12*n23*n41 - n13*n21*n42 + n11*n23*n42 + n12*n21*n43 - n11*n22*n43;
		te[15] = n12*n23*n31 - n13*n22*n31 + n13*n21*n32 - n11*n23*n32 - n12*n21*n33 + n11*n22*n33;
		this.multiplyScalar( 1 / m.determinant() );

		return this;

	},

	setRotationFromEuler: function ( v, order ) {

		var te = this.elements;

		var x = v.x, y = v.y, z = v.z;
		var a = Math.cos( x ), b = Math.sin( x );
		var c = Math.cos( y ), d = Math.sin( y );
		var e = Math.cos( z ), f = Math.sin( z );

		if ( order === undefined || order === 'XYZ' ) {

			var ae = a * e, af = a * f, be = b * e, bf = b * f;

			te[0] = c * e;
			te[4] = - c * f;
			te[8] = d;

			te[1] = af + be * d;
			te[5] = ae - bf * d;
			te[9] = - b * c;

			te[2] = bf - ae * d;
			te[6] = be + af * d;
			te[10] = a * c;

		} else if ( order === 'YXZ' ) {

			var ce = c * e, cf = c * f, de = d * e, df = d * f;

			te[0] = ce + df * b;
			te[4] = de * b - cf;
			te[8] = a * d;

			te[1] = a * f;
			te[5] = a * e;
			te[9] = - b;

			te[2] = cf * b - de;
			te[6] = df + ce * b;
			te[10] = a * c;

		} else if ( order === 'ZXY' ) {

			var ce = c * e, cf = c * f, de = d * e, df = d * f;

			te[0] = ce - df * b;
			te[4] = - a * f;
			te[8] = de + cf * b;

			te[1] = cf + de * b;
			te[5] = a * e;
			te[9] = df - ce * b;

			te[2] = - a * d;
			te[6] = b;
			te[10] = a * c;

		} else if ( order === 'ZYX' ) {

			var ae = a * e, af = a * f, be = b * e, bf = b * f;

			te[0] = c * e;
			te[4] = be * d - af;
			te[8] = ae * d + bf;

			te[1] = c * f;
			te[5] = bf * d + ae;
			te[9] = af * d - be;

			te[2] = - d;
			te[6] = b * c;
			te[10] = a * c;

		} else if ( order === 'YZX' ) {

			var ac = a * c, ad = a * d, bc = b * c, bd = b * d;

			te[0] = c * e;
			te[4] = bd - ac * f;
			te[8] = bc * f + ad;

			te[1] = f;
			te[5] = a * e;
			te[9] = - b * e;

			te[2] = - d * e;
			te[6] = ad * f + bc;
			te[10] = ac - bd * f;

		} else if ( order === 'XZY' ) {

			var ac = a * c, ad = a * d, bc = b * c, bd = b * d;

			te[0] = c * e;
			te[4] = - f;
			te[8] = d * e;

			te[1] = ac * f + bd;
			te[5] = a * e;
			te[9] = ad * f - bc;

			te[2] = bc * f - ad;
			te[6] = b * e;
			te[10] = bd * f + ac;

		}

		return this;

	},


	setRotationFromQuaternion: function ( q ) {

		var te = this.elements;

		var x = q.x, y = q.y, z = q.z, w = q.w;
		var x2 = x + x, y2 = y + y, z2 = z + z;
		var xx = x * x2, xy = x * y2, xz = x * z2;
		var yy = y * y2, yz = y * z2, zz = z * z2;
		var wx = w * x2, wy = w * y2, wz = w * z2;

		te[0] = 1 - ( yy + zz );
		te[4] = xy - wz;
		te[8] = xz + wy;

		te[1] = xy + wz;
		te[5] = 1 - ( xx + zz );
		te[9] = yz - wx;

		te[2] = xz - wy;
		te[6] = yz + wx;
		te[10] = 1 - ( xx + yy );

		return this;

	},

	compose: function ( translation, rotation, scale ) {

		var te = this.elements;
		var mRotation = THREE.Matrix4.__m1;
		var mScale = THREE.Matrix4.__m2;

		mRotation.identity();
		mRotation.setRotationFromQuaternion( rotation );

		mScale.makeScale( scale.x, scale.y, scale.z );

		this.multiply( mRotation, mScale );

		te[12] = translation.x;
		te[13] = translation.y;
		te[14] = translation.z;

		return this;

	},

	decompose: function ( translation, rotation, scale ) {

		var te = this.elements;

		// grab the axis vectors
		var x = THREE.Matrix4.__v1;
		var y = THREE.Matrix4.__v2;
		var z = THREE.Matrix4.__v3;

		x.set( te[0], te[1], te[2] );
		y.set( te[4], te[5], te[6] );
		z.set( te[8], te[9], te[10] );

		translation = ( translation instanceof THREE.Vector3 ) ? translation : new THREE.Vector3();
		rotation = ( rotation instanceof THREE.Quaternion ) ? rotation : new THREE.Quaternion();
		scale = ( scale instanceof THREE.Vector3 ) ? scale : new THREE.Vector3();

		scale.x = x.length();
		scale.y = y.length();
		scale.z = z.length();

		translation.x = te[12];
		translation.y = te[13];
		translation.z = te[14];

		// scale the rotation part

		var matrix = THREE.Matrix4.__m1;

		matrix.copy( this );

		matrix.elements[0] /= scale.x;
		matrix.elements[1] /= scale.x;
		matrix.elements[2] /= scale.x;

		matrix.elements[4] /= scale.y;
		matrix.elements[5] /= scale.y;
		matrix.elements[6] /= scale.y;

		matrix.elements[8] /= scale.z;
		matrix.elements[9] /= scale.z;
		matrix.elements[10] /= scale.z;

		rotation.setFromRotationMatrix( matrix );

		return [ translation, rotation, scale ];

	},

	extractPosition: function ( m ) {

		var te = this.elements;
		var me = m.elements;

		te[12] = me[12];
		te[13] = me[13];
		te[14] = me[14];

		return this;

	},

	extractRotation: function ( m ) {

		var te = this.elements;
		var me = m.elements;

		var vector = THREE.Matrix4.__v1;

		var scaleX = 1 / vector.set( me[0], me[1], me[2] ).length();
		var scaleY = 1 / vector.set( me[4], me[5], me[6] ).length();
		var scaleZ = 1 / vector.set( me[8], me[9], me[10] ).length();

		te[0] = me[0] * scaleX;
		te[1] = me[1] * scaleX;
		te[2] = me[2] * scaleX;

		te[4] = me[4] * scaleY;
		te[5] = me[5] * scaleY;
		te[6] = me[6] * scaleY;

		te[8] = me[8] * scaleZ;
		te[9] = me[9] * scaleZ;
		te[10] = me[10] * scaleZ;

		return this;

	},

	//

	translate: function ( v ) {

		var te = this.elements;
		var x = v.x, y = v.y, z = v.z;

		te[12] = te[0] * x + te[4] * y + te[8] * z + te[12];
		te[13] = te[1] * x + te[5] * y + te[9] * z + te[13];
		te[14] = te[2] * x + te[6] * y + te[10] * z + te[14];
		te[15] = te[3] * x + te[7] * y + te[11] * z + te[15];

		return this;

	},

	rotateX: function ( angle ) {

		var te = this.elements;
		var m12 = te[4];
		var m22 = te[5];
		var m32 = te[6];
		var m42 = te[7];
		var m13 = te[8];
		var m23 = te[9];
		var m33 = te[10];
		var m43 = te[11];
		var c = Math.cos( angle );
		var s = Math.sin( angle );

		te[4] = c * m12 + s * m13;
		te[5] = c * m22 + s * m23;
		te[6] = c * m32 + s * m33;
		te[7] = c * m42 + s * m43;

		te[8] = c * m13 - s * m12;
		te[9] = c * m23 - s * m22;
		te[10] = c * m33 - s * m32;
		te[11] = c * m43 - s * m42;

		return this;

	},

	rotateY: function ( angle ) {

		var te = this.elements;
		var m11 = te[0];
		var m21 = te[1];
		var m31 = te[2];
		var m41 = te[3];
		var m13 = te[8];
		var m23 = te[9];
		var m33 = te[10];
		var m43 = te[11];
		var c = Math.cos( angle );
		var s = Math.sin( angle );

		te[0] = c * m11 - s * m13;
		te[1] = c * m21 - s * m23;
		te[2] = c * m31 - s * m33;
		te[3] = c * m41 - s * m43;

		te[8] = c * m13 + s * m11;
		te[9] = c * m23 + s * m21;
		te[10] = c * m33 + s * m31;
		te[11] = c * m43 + s * m41;

		return this;

	},

	rotateZ: function ( angle ) {

		var te = this.elements;
		var m11 = te[0];
		var m21 = te[1];
		var m31 = te[2];
		var m41 = te[3];
		var m12 = te[4];
		var m22 = te[5];
		var m32 = te[6];
		var m42 = te[7];
		var c = Math.cos( angle );
		var s = Math.sin( angle );

		te[0] = c * m11 + s * m12;
		te[1] = c * m21 + s * m22;
		te[2] = c * m31 + s * m32;
		te[3] = c * m41 + s * m42;

		te[4] = c * m12 - s * m11;
		te[5] = c * m22 - s * m21;
		te[6] = c * m32 - s * m31;
		te[7] = c * m42 - s * m41;

		return this;

	},

	rotateByAxis: function ( axis, angle ) {

		var te = this.elements;

		// optimize by checking axis

		if ( axis.x === 1 && axis.y === 0 && axis.z === 0 ) {

			return this.rotateX( angle );

		} else if ( axis.x === 0 && axis.y === 1 && axis.z === 0 ) {

			return this.rotateY( angle );

		} else if ( axis.x === 0 && axis.y === 0 && axis.z === 1 ) {

			return this.rotateZ( angle );

		}

		var x = axis.x, y = axis.y, z = axis.z;
		var n = Math.sqrt(x * x + y * y + z * z);

		x /= n;
		y /= n;
		z /= n;

		var xx = x * x, yy = y * y, zz = z * z;
		var c = Math.cos( angle );
		var s = Math.sin( angle );
		var oneMinusCosine = 1 - c;
		var xy = x * y * oneMinusCosine;
		var xz = x * z * oneMinusCosine;
		var yz = y * z * oneMinusCosine;
		var xs = x * s;
		var ys = y * s;
		var zs = z * s;

		var r11 = xx + (1 - xx) * c;
		var r21 = xy + zs;
		var r31 = xz - ys;
		var r12 = xy - zs;
		var r22 = yy + (1 - yy) * c;
		var r32 = yz + xs;
		var r13 = xz + ys;
		var r23 = yz - xs;
		var r33 = zz + (1 - zz) * c;

		var m11 = te[0], m21 = te[1], m31 = te[2], m41 = te[3];
		var m12 = te[4], m22 = te[5], m32 = te[6], m42 = te[7];
		var m13 = te[8], m23 = te[9], m33 = te[10], m43 = te[11];
		var m14 = te[12], m24 = te[13], m34 = te[14], m44 = te[15];

		te[0] = r11 * m11 + r21 * m12 + r31 * m13;
		te[1] = r11 * m21 + r21 * m22 + r31 * m23;
		te[2] = r11 * m31 + r21 * m32 + r31 * m33;
		te[3] = r11 * m41 + r21 * m42 + r31 * m43;

		te[4] = r12 * m11 + r22 * m12 + r32 * m13;
		te[5] = r12 * m21 + r22 * m22 + r32 * m23;
		te[6] = r12 * m31 + r22 * m32 + r32 * m33;
		te[7] = r12 * m41 + r22 * m42 + r32 * m43;

		te[8] = r13 * m11 + r23 * m12 + r33 * m13;
		te[9] = r13 * m21 + r23 * m22 + r33 * m23;
		te[10] = r13 * m31 + r23 * m32 + r33 * m33;
		te[11] = r13 * m41 + r23 * m42 + r33 * m43;

		return this;

	},

	scale: function ( v ) {

		var te = this.elements;
		var x = v.x, y = v.y, z = v.z;

		te[0] *= x; te[4] *= y; te[8] *= z;
		te[1] *= x; te[5] *= y; te[9] *= z;
		te[2] *= x; te[6] *= y; te[10] *= z;
		te[3] *= x; te[7] *= y; te[11] *= z;

		return this;

	},

	getMaxScaleOnAxis: function () {

		var te = this.elements;

		var scaleXSq =  te[0] * te[0] + te[1] * te[1] + te[2] * te[2];
		var scaleYSq =  te[4] * te[4] + te[5] * te[5] + te[6] * te[6];
		var scaleZSq =  te[8] * te[8] + te[9] * te[9] + te[10] * te[10];

		return Math.sqrt( Math.max( scaleXSq, Math.max( scaleYSq, scaleZSq ) ) );

	},

	//

	makeTranslation: function ( x, y, z ) {

		this.set(

			1, 0, 0, x,
			0, 1, 0, y,
			0, 0, 1, z,
			0, 0, 0, 1

		);

		return this;

	},

	makeRotationX: function ( theta ) {

		var c = Math.cos( theta ), s = Math.sin( theta );

		this.set(

			1, 0,  0, 0,
			0, c, -s, 0,
			0, s,  c, 0,
			0, 0,  0, 1

		);

		return this;

	},

	makeRotationY: function ( theta ) {

		var c = Math.cos( theta ), s = Math.sin( theta );

		this.set(

			 c, 0, s, 0,
			 0, 1, 0, 0,
			-s, 0, c, 0,
			 0, 0, 0, 1

		);

		return this;

	},

	makeRotationZ: function ( theta ) {

		var c = Math.cos( theta ), s = Math.sin( theta );

		this.set(

			c, -s, 0, 0,
			s,  c, 0, 0,
			0,  0, 1, 0,
			0,  0, 0, 1

		);

		return this;

	},

	makeRotationAxis: function ( axis, angle ) {

		// Based on http://www.gamedev.net/reference/articles/article1199.asp

		var c = Math.cos( angle );
		var s = Math.sin( angle );
		var t = 1 - c;
		var x = axis.x, y = axis.y, z = axis.z;
		var tx = t * x, ty = t * y;

		this.set(

			tx * x + c, tx * y - s * z, tx * z + s * y, 0,
			tx * y + s * z, ty * y + c, ty * z - s * x, 0,
			tx * z - s * y, ty * z + s * x, t * z * z + c, 0,
			0, 0, 0, 1

		);

		 return this;

	},

	makeScale: function ( x, y, z ) {

		this.set(

			x, 0, 0, 0,
			0, y, 0, 0,
			0, 0, z, 0,
			0, 0, 0, 1

		);

		return this;

	},

	makeFrustum: function ( left, right, bottom, top, near, far ) {

		var te = this.elements;
		var x = 2 * near / ( right - left );
		var y = 2 * near / ( top - bottom );

		var a = ( right + left ) / ( right - left );
		var b = ( top + bottom ) / ( top - bottom );
		var c = - ( far + near ) / ( far - near );
		var d = - 2 * far * near / ( far - near );

		te[0] = x;  te[4] = 0;  te[8] = a;   te[12] = 0;
		te[1] = 0;  te[5] = y;  te[9] = b;   te[13] = 0;
		te[2] = 0;  te[6] = 0;  te[10] = c;   te[14] = d;
		te[3] = 0;  te[7] = 0;  te[11] = - 1; te[15] = 0;

		return this;

	},

	makePerspective: function ( fov, aspect, near, far ) {

		var ymax = near * Math.tan( fov * Math.PI / 360 );
		var ymin = - ymax;
		var xmin = ymin * aspect;
		var xmax = ymax * aspect;

		return this.makeFrustum( xmin, xmax, ymin, ymax, near, far );

	},

	makeOrthographic: function ( left, right, top, bottom, near, far ) {

		var te = this.elements;
		var w = right - left;
		var h = top - bottom;
		var p = far - near;

		var x = ( right + left ) / w;
		var y = ( top + bottom ) / h;
		var z = ( far + near ) / p;

		te[0] = 2 / w; te[4] = 0;     te[8] = 0;      te[12] = -x;
		te[1] = 0;     te[5] = 2 / h; te[9] = 0;      te[13] = -y;
		te[2] = 0;     te[6] = 0;     te[10] = -2 / p; te[14] = -z;
		te[3] = 0;     te[7] = 0;     te[11] = 0;      te[15] = 1;

		return this;

	},


	clone: function () {

		var te = this.elements;

		return new THREE.Matrix4(

			te[0], te[4], te[8], te[12],
			te[1], te[5], te[9], te[13],
			te[2], te[6], te[10], te[14],
			te[3], te[7], te[11], te[15]

		);

	}

};

THREE.Matrix4.__v1 = new THREE.Vector3();
THREE.Matrix4.__v2 = new THREE.Vector3();
THREE.Matrix4.__v3 = new THREE.Vector3();

THREE.Matrix4.__m1 = new THREE.Matrix4();
THREE.Matrix4.__m2 = new THREE.Matrix4();
/**
 * https://github.com/mrdoob/eventtarget.js/
 */

THREE.EventTarget = function () {

	var listeners = {};

	this.addEventListener = function ( type, listener ) {

		if ( listeners[ type ] === undefined ) {

			listeners[ type ] = [];

		}

		if ( listeners[ type ].indexOf( listener ) === - 1 ) {

			listeners[ type ].push( listener );

		}

	};

	this.dispatchEvent = function ( event ) {

		for ( var listener in listeners[ event.type ] ) {

			listeners[ event.type ][ listener ]( event );

		}

	};

	this.removeEventListener = function ( type, listener ) {

		var index = listeners[ type ].indexOf( listener );

		if ( index !== - 1 ) {

			listeners[ type ].splice( index, 1 );

		}

	};

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Frustum = function ( ) {

	this.planes = [

		new THREE.Vector4(),
		new THREE.Vector4(),
		new THREE.Vector4(),
		new THREE.Vector4(),
		new THREE.Vector4(),
		new THREE.Vector4()

	];

};

THREE.Frustum.prototype.setFromMatrix = function ( m ) {

	var plane;
	var planes = this.planes;

	var me = m.elements;
	var me0 = me[0], me1 = me[1], me2 = me[2], me3 = me[3];
	var me4 = me[4], me5 = me[5], me6 = me[6], me7 = me[7];
	var me8 = me[8], me9 = me[9], me10 = me[10], me11 = me[11];
	var me12 = me[12], me13 = me[13], me14 = me[14], me15 = me[15];

	planes[ 0 ].set( me3 - me0, me7 - me4, me11 - me8, me15 - me12 );
	planes[ 1 ].set( me3 + me0, me7 + me4, me11 + me8, me15 + me12 );
	planes[ 2 ].set( me3 + me1, me7 + me5, me11 + me9, me15 + me13 );
	planes[ 3 ].set( me3 - me1, me7 - me5, me11 - me9, me15 - me13 );
	planes[ 4 ].set( me3 - me2, me7 - me6, me11 - me10, me15 - me14 );
	planes[ 5 ].set( me3 + me2, me7 + me6, me11 + me10, me15 + me14 );

	for ( var i = 0; i < 6; i ++ ) {

		plane = planes[ i ];
		plane.divideScalar( Math.sqrt( plane.x * plane.x + plane.y * plane.y + plane.z * plane.z ) );

	}

};

THREE.Frustum.prototype.contains = function ( object ) {

	var distance = 0.0;
	var planes = this.planes;
	var matrix = object.matrixWorld;
	var me = matrix.elements;
	var radius = - object.geometry.boundingSphere.radius * matrix.getMaxScaleOnAxis();

	for ( var i = 0; i < 6; i ++ ) {

		distance = planes[ i ].x * me[12] + planes[ i ].y * me[13] + planes[ i ].z * me[14] + planes[ i ].w;
		if ( distance <= radius ) return false;

	}

	return true;

};

THREE.Frustum.__v1 = new THREE.Vector3();
/**
 * @author mrdoob / http://mrdoob.com/
 */

( function ( THREE ) {

	THREE.Ray = function ( origin, direction, near, far ) {

		this.origin = origin || new THREE.Vector3();
		this.direction = direction || new THREE.Vector3();
		this.near = near || 0;
		this.far = far || Infinity;

	};

	var originCopy = new THREE.Vector3();

	var localOriginCopy = new THREE.Vector3();
	var localDirectionCopy = new THREE.Vector3();

	var vector = new THREE.Vector3();
	var normal = new THREE.Vector3();
	var intersectPoint = new THREE.Vector3();

	var inverseMatrix = new THREE.Matrix4();

	var descSort = function ( a, b ) {

		return a.distance - b.distance;

	};

	var v0 = new THREE.Vector3(), v1 = new THREE.Vector3(), v2 = new THREE.Vector3();

	var distanceFromIntersection = function ( origin, direction, position ) {

		v0.sub( position, origin );

		var dot = v0.dot( direction );

		var intersect = v1.add( origin, v2.copy( direction ).multiplyScalar( dot ) );
		var distance = position.distanceTo( intersect );

		return distance;

	};

	// http://www.blackpawn.com/texts/pointinpoly/default.html

	var pointInFace3 = function ( p, a, b, c ) {

		v0.sub( c, a );
		v1.sub( b, a );
		v2.sub( p, a );

		var dot00 = v0.dot( v0 );
		var dot01 = v0.dot( v1 );
		var dot02 = v0.dot( v2 );
		var dot11 = v1.dot( v1 );
		var dot12 = v1.dot( v2 );

		var invDenom = 1 / ( dot00 * dot11 - dot01 * dot01 );
		var u = ( dot11 * dot02 - dot01 * dot12 ) * invDenom;
		var v = ( dot00 * dot12 - dot01 * dot02 ) * invDenom;

		return ( u >= 0 ) && ( v >= 0 ) && ( u + v < 1 );

	};

	var intersectObject = function ( object, ray, intersects ) {

		if ( object instanceof THREE.Particle ) {

			var distance = distanceFromIntersection( ray.origin, ray.direction, object.matrixWorld.getPosition() );

			if ( distance > object.scale.x ) {

				return intersects;

			}

			intersects.push( {

				distance: distance,
				point: object.position,
				face: null,
				object: object

			} );

		} else if ( object instanceof THREE.Mesh ) {

			// Checking boundingSphere

			var scaledRadius = object.geometry.boundingSphere.radius * object.matrixWorld.getMaxScaleOnAxis();

			// Checking distance to ray

			var distance = distanceFromIntersection( ray.origin, ray.direction, object.matrixWorld.getPosition() );

			if ( distance > scaledRadius) {

				return intersects;

			}

			// Checking faces

			var geometry = object.geometry;
			var vertices = geometry.vertices;

			var isFaceMaterial = object.material instanceof THREE.MeshFaceMaterial;
			var objectMaterials = isFaceMaterial === true ? object.material.materials : null;

			var side = object.material.side;

			var a, b, c, d;
			var precision = ray.precision;

			object.matrixRotationWorld.extractRotation( object.matrixWorld );

			originCopy.copy( ray.origin );

			inverseMatrix.getInverse( object.matrixWorld );

			localOriginCopy.copy( originCopy );
			inverseMatrix.multiplyVector3( localOriginCopy );

			localDirectionCopy.copy( ray.direction );
			inverseMatrix.rotateAxis( localDirectionCopy ).normalize();

			for ( var f = 0, fl = geometry.faces.length; f < fl; f ++ ) {

				var face = geometry.faces[ f ];

				var material = isFaceMaterial === true ? objectMaterials[ face.materialIndex ] : object.material;

				if ( material === undefined ) continue;

				side = material.side;

				vector.sub( face.centroid, localOriginCopy );

				var normal = face.normal;
				var dot = localDirectionCopy.dot( normal );

				// bail if ray and plane are parallel

				if ( Math.abs( dot ) < precision ) continue;

				// calc distance to plane

				var scalar = normal.dot( vector ) / dot;

				// if negative distance, then plane is behind ray

				if ( scalar < 0 ) continue;

				if ( side === THREE.DoubleSide || ( side === THREE.FrontSide ? dot < 0 : dot > 0 ) ) {

					intersectPoint.add( localOriginCopy, localDirectionCopy.multiplyScalar( scalar ) );

					if ( face instanceof THREE.Face3 ) {

						a = vertices[ face.a ];
						b = vertices[ face.b ];
						c = vertices[ face.c ];

						if ( pointInFace3( intersectPoint, a, b, c ) ) {

							var point = object.matrixWorld.multiplyVector3( intersectPoint.clone() );
							distance = originCopy.distanceTo( point );

							if ( distance < ray.near || distance > ray.far ) continue;

							intersects.push( {

								distance: distance,
								point: point,
								face: face,
								faceIndex: f,
								object: object

							} );

						}

					} else if ( face instanceof THREE.Face4 ) {

						a = vertices[ face.a ];
						b = vertices[ face.b ];
						c = vertices[ face.c ];
						d = vertices[ face.d ];

						if ( pointInFace3( intersectPoint, a, b, d ) || pointInFace3( intersectPoint, b, c, d ) ) {

							var point = object.matrixWorld.multiplyVector3( intersectPoint.clone() );
							distance = originCopy.distanceTo( point );

							if ( distance < ray.near || distance > ray.far ) continue;

							intersects.push( {

								distance: distance,
								point: point,
								face: face,
								faceIndex: f,
								object: object

							} );

						}

					}

				}

			}

		}

	};

	var intersectDescendants = function ( object, ray, intersects ) {

		var descendants = object.getDescendants();

		for ( var i = 0, l = descendants.length; i < l; i ++ ) {

			intersectObject( descendants[ i ], ray, intersects );

		}
	};

	//

	THREE.Ray.prototype.precision = 0.0001;

	THREE.Ray.prototype.set = function ( origin, direction ) {

		this.origin = origin;
		this.direction = direction;

	};

	THREE.Ray.prototype.intersectObject = function ( object, recursive ) {

		var intersects = [];

		if ( recursive === true ) {

			intersectDescendants( object, this, intersects );

		}

		intersectObject( object, this, intersects );

		intersects.sort( descSort );

		return intersects;

	};

	THREE.Ray.prototype.intersectObjects = function ( objects, recursive ) {

		var intersects = [];

		for ( var i = 0, l = objects.length; i < l; i ++ ) {

			intersectObject( objects[ i ], this, intersects );

			if ( recursive === true ) {

				intersectDescendants( objects[ i ], this, intersects );

			}
		}

		intersects.sort( descSort );

		return intersects;

	};

}( THREE ) );
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.Rectangle = function () {

	var _left = 0;
	var _top = 0;
	var _right = 0;
	var _bottom = 0;
	var _width = 0;
	var _height = 0;
	var _isEmpty = true;

	function resize() {

		_width = _right - _left;
		_height = _bottom - _top;

	}

	this.getX = function () {

		return _left;

	};

	this.getY = function () {

		return _top;

	};

	this.getWidth = function () {

		return _width;

	};

	this.getHeight = function () {

		return _height;

	};

	this.getLeft = function() {

		return _left;

	};

	this.getTop = function() {

		return _top;

	};

	this.getRight = function() {

		return _right;

	};

	this.getBottom = function() {

		return _bottom;

	};

	this.set = function ( left, top, right, bottom ) {

		_isEmpty = false;

		_left = left; _top = top;
		_right = right; _bottom = bottom;

		resize();

	};

	this.addPoint = function ( x, y ) {

		if ( _isEmpty === true ) {

			_isEmpty = false;
			_left = x; _top = y;
			_right = x; _bottom = y;

			resize();

		} else {

			_left = _left < x ? _left : x; // Math.min( _left, x );
			_top = _top < y ? _top : y; // Math.min( _top, y );
			_right = _right > x ? _right : x; // Math.max( _right, x );
			_bottom = _bottom > y ? _bottom : y; // Math.max( _bottom, y );

			resize();
		}

	};

	this.add3Points = function ( x1, y1, x2, y2, x3, y3 ) {

		if ( _isEmpty === true ) {

			_isEmpty = false;
			_left = x1 < x2 ? ( x1 < x3 ? x1 : x3 ) : ( x2 < x3 ? x2 : x3 );
			_top = y1 < y2 ? ( y1 < y3 ? y1 : y3 ) : ( y2 < y3 ? y2 : y3 );
			_right = x1 > x2 ? ( x1 > x3 ? x1 : x3 ) : ( x2 > x3 ? x2 : x3 );
			_bottom = y1 > y2 ? ( y1 > y3 ? y1 : y3 ) : ( y2 > y3 ? y2 : y3 );

			resize();

		} else {

			_left = x1 < x2 ? ( x1 < x3 ? ( x1 < _left ? x1 : _left ) : ( x3 < _left ? x3 : _left ) ) : ( x2 < x3 ? ( x2 < _left ? x2 : _left ) : ( x3 < _left ? x3 : _left ) );
			_top = y1 < y2 ? ( y1 < y3 ? ( y1 < _top ? y1 : _top ) : ( y3 < _top ? y3 : _top ) ) : ( y2 < y3 ? ( y2 < _top ? y2 : _top ) : ( y3 < _top ? y3 : _top ) );
			_right = x1 > x2 ? ( x1 > x3 ? ( x1 > _right ? x1 : _right ) : ( x3 > _right ? x3 : _right ) ) : ( x2 > x3 ? ( x2 > _right ? x2 : _right ) : ( x3 > _right ? x3 : _right ) );
			_bottom = y1 > y2 ? ( y1 > y3 ? ( y1 > _bottom ? y1 : _bottom ) : ( y3 > _bottom ? y3 : _bottom ) ) : ( y2 > y3 ? ( y2 > _bottom ? y2 : _bottom ) : ( y3 > _bottom ? y3 : _bottom ) );

			resize();

		};

	};

	this.addRectangle = function ( r ) {

		if ( _isEmpty === true ) {

			_isEmpty = false;
			_left = r.getLeft(); _top = r.getTop();
			_right = r.getRight(); _bottom = r.getBottom();

			resize();

		} else {

			_left = _left < r.getLeft() ? _left : r.getLeft(); // Math.min(_left, r.getLeft() );
			_top = _top < r.getTop() ? _top : r.getTop(); // Math.min(_top, r.getTop() );
			_right = _right > r.getRight() ? _right : r.getRight(); // Math.max(_right, r.getRight() );
			_bottom = _bottom > r.getBottom() ? _bottom : r.getBottom(); // Math.max(_bottom, r.getBottom() );

			resize();

		}

	};

	this.inflate = function ( v ) {

		_left -= v; _top -= v;
		_right += v; _bottom += v;

		resize();

	};

	this.minSelf = function ( r ) {

		_left = _left > r.getLeft() ? _left : r.getLeft(); // Math.max( _left, r.getLeft() );
		_top = _top > r.getTop() ? _top : r.getTop(); // Math.max( _top, r.getTop() );
		_right = _right < r.getRight() ? _right : r.getRight(); // Math.min( _right, r.getRight() );
		_bottom = _bottom < r.getBottom() ? _bottom : r.getBottom(); // Math.min( _bottom, r.getBottom() );

		resize();

	};

	this.intersects = function ( r ) {

		// http://gamemath.com/2011/09/detecting-whether-two-boxes-overlap/

		if ( _right < r.getLeft() ) return false;
		if ( _left > r.getRight() ) return false;
		if ( _bottom < r.getTop() ) return false;
		if ( _top > r.getBottom() ) return false;

		return true;

	};

	this.empty = function () {

		_isEmpty = true;

		_left = 0; _top = 0;
		_right = 0; _bottom = 0;

		resize();

	};

	this.isEmpty = function () {

		return _isEmpty;

	};

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Math = {

	// Clamp value to range <a, b>

	clamp: function ( x, a, b ) {

		return ( x < a ) ? a : ( ( x > b ) ? b : x );

	},

	// Clamp value to range <a, inf)

	clampBottom: function ( x, a ) {

		return x < a ? a : x;

	},

	// Linear mapping from range <a1, a2> to range <b1, b2>

	mapLinear: function ( x, a1, a2, b1, b2 ) {

		return b1 + ( x - a1 ) * ( b2 - b1 ) / ( a2 - a1 );

	},

	// Random float from <0, 1> with 16 bits of randomness
	// (standard Math.random() creates repetitive patterns when applied over larger space)

	random16: function () {

		return ( 65280 * Math.random() + 255 * Math.random() ) / 65535;

	},

	// Random integer from <low, high> interval

	randInt: function ( low, high ) {

		return low + Math.floor( Math.random() * ( high - low + 1 ) );

	},

	// Random float from <low, high> interval

	randFloat: function ( low, high ) {

		return low + Math.random() * ( high - low );

	},

	// Random float from <-range/2, range/2> interval

	randFloatSpread: function ( range ) {

		return range * ( 0.5 - Math.random() );

	},

	sign: function ( x ) {

		return ( x < 0 ) ? -1 : ( ( x > 0 ) ? 1 : 0 );

	}

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Object3D = function () {

	THREE.Object3DLibrary.push( this );

	this.id = THREE.Object3DIdCount ++;

	this.name = '';
	this.properties = {};

	this.parent = undefined;
	this.children = [];

	this.up = new THREE.Vector3( 0, 1, 0 );

	this.position = new THREE.Vector3();
	this.rotation = new THREE.Vector3();
	this.eulerOrder = THREE.Object3D.defaultEulerOrder;
	this.scale = new THREE.Vector3( 1, 1, 1 );

	this.renderDepth = null;

	this.rotationAutoUpdate = true;

	this.matrix = new THREE.Matrix4();
	this.matrixWorld = new THREE.Matrix4();
	this.matrixRotationWorld = new THREE.Matrix4();

	this.matrixAutoUpdate = true;
	this.matrixWorldNeedsUpdate = true;

	this.quaternion = new THREE.Quaternion();
	this.useQuaternion = false;

	this.boundRadius = 0.0;
	this.boundRadiusScale = 1.0;

	this.visible = true;

	this.castShadow = false;
	this.receiveShadow = false;

	this.frustumCulled = true;

	this._vector = new THREE.Vector3();

};


THREE.Object3D.prototype = {

	constructor: THREE.Object3D,

	applyMatrix: function ( matrix ) {

		this.matrix.multiply( matrix, this.matrix );

		this.scale.getScaleFromMatrix( this.matrix );

		var mat = new THREE.Matrix4().extractRotation( this.matrix );
		this.rotation.setEulerFromRotationMatrix( mat, this.eulerOrder );

		this.position.getPositionFromMatrix( this.matrix );

	},

	translate: function ( distance, axis ) {

		this.matrix.rotateAxis( axis );
		this.position.addSelf( axis.multiplyScalar( distance ) );

	},

	translateX: function ( distance ) {

		this.translate( distance, this._vector.set( 1, 0, 0 ) );

	},

	translateY: function ( distance ) {

		this.translate( distance, this._vector.set( 0, 1, 0 ) );

	},

	translateZ: function ( distance ) {

		this.translate( distance, this._vector.set( 0, 0, 1 ) );

	},

	localToWorld: function ( vector ) {

		return this.matrixWorld.multiplyVector3( vector );

	},

	worldToLocal: function ( vector ) {

		return THREE.Object3D.__m1.getInverse( this.matrixWorld ).multiplyVector3( vector );

	},

	lookAt: function ( vector ) {

		// TODO: Add hierarchy support.

		this.matrix.lookAt( vector, this.position, this.up );

		if ( this.rotationAutoUpdate ) {

			if ( this.useQuaternion === false )  {

				this.rotation.setEulerFromRotationMatrix( this.matrix, this.eulerOrder );

			} else {

				this.quaternion.copy( this.matrix.decompose()[ 1 ] );

			}

		}

	},

	add: function ( object ) {

		if ( object === this ) {

			console.warn( 'THREE.Object3D.add: An object can\'t be added as a child of itself.' );
			return;

		}

		if ( object instanceof THREE.Object3D ) {

			if ( object.parent !== undefined ) {

				object.parent.remove( object );

			}

			object.parent = this;
			this.children.push( object );

			// add to scene

			var scene = this;

			while ( scene.parent !== undefined ) {

				scene = scene.parent;

			}

			if ( scene !== undefined && scene instanceof THREE.Scene )  {

				scene.__addObject( object );

			}

		}

	},

	remove: function ( object ) {

		var index = this.children.indexOf( object );

		if ( index !== - 1 ) {

			object.parent = undefined;
			this.children.splice( index, 1 );

			// remove from scene

			var scene = this;

			while ( scene.parent !== undefined ) {

				scene = scene.parent;

			}

			if ( scene !== undefined && scene instanceof THREE.Scene ) {

				scene.__removeObject( object );

			}

		}

	},

	traverse: function ( callback ) {

		callback( this );

		for ( var i = 0, l = this.children.length; i < l; i ++ ) {

			this.children[ i ].traverse( callback );

		}

	},

	getChildByName: function ( name, recursive ) {

		for ( var i = 0, l = this.children.length; i < l; i ++ ) {

			var child = this.children[ i ];

			if ( child.name === name ) {

				return child;

			}

			if ( recursive === true ) {

				child = child.getChildByName( name, recursive );

				if ( child !== undefined ) {

					return child;

				}

			}

		}

		return undefined;

	},

	getDescendants: function ( array ) {

		if ( array === undefined ) array = [];

		Array.prototype.push.apply( array, this.children );

		for ( var i = 0, l = this.children.length; i < l; i ++ ) {

			this.children[ i ].getDescendants( array );

		}

		return array;

	},

	updateMatrix: function () {

		this.matrix.setPosition( this.position );

		if ( this.useQuaternion === false )  {

			this.matrix.setRotationFromEuler( this.rotation, this.eulerOrder );

		} else {

			this.matrix.setRotationFromQuaternion( this.quaternion );

		}

		if ( this.scale.x !== 1 || this.scale.y !== 1 || this.scale.z !== 1 ) {

			this.matrix.scale( this.scale );
			this.boundRadiusScale = Math.max( this.scale.x, Math.max( this.scale.y, this.scale.z ) );

		}

		this.matrixWorldNeedsUpdate = true;

	},

	updateMatrixWorld: function ( force ) {

		if ( this.matrixAutoUpdate === true ) this.updateMatrix();

		if ( this.matrixWorldNeedsUpdate === true || force === true ) {

			if ( this.parent === undefined ) {

				this.matrixWorld.copy( this.matrix );

			} else {

				this.matrixWorld.multiply( this.parent.matrixWorld, this.matrix );

			}

			this.matrixWorldNeedsUpdate = false;

			force = true;

		}

		// update children

		for ( var i = 0, l = this.children.length; i < l; i ++ ) {

			this.children[ i ].updateMatrixWorld( force );

		}

	},

	clone: function ( object ) {

		if ( object === undefined ) object = new THREE.Object3D();

		object.name = this.name;

		object.up.copy( this.up );

		object.position.copy( this.position );
		if ( object.rotation instanceof THREE.Vector3 ) object.rotation.copy( this.rotation ); // because of Sprite madness
		object.eulerOrder = this.eulerOrder;
		object.scale.copy( this.scale );

		object.renderDepth = this.renderDepth;

		object.rotationAutoUpdate = this.rotationAutoUpdate;

		object.matrix.copy( this.matrix );
		object.matrixWorld.copy( this.matrixWorld );
		object.matrixRotationWorld.copy( this.matrixRotationWorld );

		object.matrixAutoUpdate = this.matrixAutoUpdate;
		object.matrixWorldNeedsUpdate = this.matrixWorldNeedsUpdate;

		object.quaternion.copy( this.quaternion );
		object.useQuaternion = this.useQuaternion;

		object.boundRadius = this.boundRadius;
		object.boundRadiusScale = this.boundRadiusScale;

		object.visible = this.visible;

		object.castShadow = this.castShadow;
		object.receiveShadow = this.receiveShadow;

		object.frustumCulled = this.frustumCulled;

		for ( var i = 0; i < this.children.length; i ++ ) {

			var child = this.children[ i ];
			object.add( child.clone() );

		}

		return object;

	},

	deallocate: function () {

		var index = THREE.Object3DLibrary.indexOf( this );
		if ( index !== -1 ) THREE.Object3DLibrary.splice( index, 1 );

	}

};

THREE.Object3D.__m1 = new THREE.Matrix4();
THREE.Object3D.defaultEulerOrder = 'XYZ',

THREE.Object3DIdCount = 0;
THREE.Object3DLibrary = [];
/**
 * @author mrdoob / http://mrdoob.com/
 * @author supereggbert / http://www.paulbrunt.co.uk/
 * @author julianwa / https://github.com/julianwa
 */

THREE.Projector = function() {

	var _object, _objectCount, _objectPool = [], _objectPoolLength = 0,
	_vertex, _vertexCount, _vertexPool = [], _vertexPoolLength = 0,
	_face, _face3Count, _face3Pool = [], _face3PoolLength = 0,
	_face4Count, _face4Pool = [], _face4PoolLength = 0,
	_line, _lineCount, _linePool = [], _linePoolLength = 0,
	_particle, _particleCount, _particlePool = [], _particlePoolLength = 0,

	_renderData = { objects: [], sprites: [], lights: [], elements: [] },

	_vector3 = new THREE.Vector3(),
	_vector4 = new THREE.Vector4(),

	_viewProjectionMatrix = new THREE.Matrix4(),
	_modelViewProjectionMatrix = new THREE.Matrix4(),
	_normalMatrix = new THREE.Matrix3(),

	_frustum = new THREE.Frustum(),

	_clippedVertex1PositionScreen = new THREE.Vector4(),
	_clippedVertex2PositionScreen = new THREE.Vector4(),

	_face3VertexNormals;

	this.projectVector = function ( vector, camera ) {

		camera.matrixWorldInverse.getInverse( camera.matrixWorld );

		_viewProjectionMatrix.multiply( camera.projectionMatrix, camera.matrixWorldInverse );
		_viewProjectionMatrix.multiplyVector3( vector );

		return vector;

	};

	this.unprojectVector = function ( vector, camera ) {

		camera.projectionMatrixInverse.getInverse( camera.projectionMatrix );

		_viewProjectionMatrix.multiply( camera.matrixWorld, camera.projectionMatrixInverse );
		_viewProjectionMatrix.multiplyVector3( vector );

		return vector;

	};

	this.pickingRay = function ( vector, camera ) {

		var end, ray, t;

		// set two vectors with opposing z values
		vector.z = -1.0;
		end = new THREE.Vector3( vector.x, vector.y, 1.0 );

		this.unprojectVector( vector, camera );
		this.unprojectVector( end, camera );

		// find direction from vector to end
		end.subSelf( vector ).normalize();

		return new THREE.Ray( vector, end );

	};

	var projectGraph = function ( root, sortObjects ) {

		_objectCount = 0;

		_renderData.objects.length = 0;
		_renderData.sprites.length = 0;
		_renderData.lights.length = 0;

		var projectObject = function ( parent ) {

			for ( var c = 0, cl = parent.children.length; c < cl; c ++ ) {

				var object = parent.children[ c ];

				if ( object.visible === false ) continue;

				if ( object instanceof THREE.Light ) {

					_renderData.lights.push( object );

				} else if ( object instanceof THREE.Mesh || object instanceof THREE.Line ) {

					if ( object.frustumCulled === false || _frustum.contains( object ) === true ) {

						_object = getNextObjectInPool();
						_object.object = object;

						if ( object.renderDepth !== null ) {

							_object.z = object.renderDepth;

						} else {

							_vector3.copy( object.matrixWorld.getPosition() );
							_viewProjectionMatrix.multiplyVector3( _vector3 );
							_object.z = _vector3.z;

						}

						_renderData.objects.push( _object );

					}

				} else if ( object instanceof THREE.Sprite || object instanceof THREE.Particle ) {

					_object = getNextObjectInPool();
					_object.object = object;

					// TODO: Find an elegant and performant solution and remove this dupe code.

					if ( object.renderDepth !== null ) {

						_object.z = object.renderDepth;

					} else {

						_vector3.copy( object.matrixWorld.getPosition() );
						_viewProjectionMatrix.multiplyVector3( _vector3 );
						_object.z = _vector3.z;

					}

					_renderData.sprites.push( _object );

				} else {

					_object = getNextObjectInPool();
					_object.object = object;

					if ( object.renderDepth !== null ) {

						_object.z = object.renderDepth;

					} else {

						_vector3.copy( object.matrixWorld.getPosition() );
						_viewProjectionMatrix.multiplyVector3( _vector3 );
						_object.z = _vector3.z;

					}

					_renderData.objects.push( _object );

				}

				projectObject( object );

			}

		};

		projectObject( root );

		if ( sortObjects === true ) _renderData.objects.sort( painterSort );

		return _renderData;

	};

	this.projectScene = function ( scene, camera, sortObjects, sortElements ) {

		var near = camera.near, far = camera.far, visible = false,
		o, ol, v, vl, f, fl, n, nl, c, cl, u, ul, object, modelMatrix,
		geometry, vertices, vertex, vertexPositionScreen,
		faces, face, faceVertexNormals, normal, faceVertexUvs, uvs,
		v1, v2, v3, v4, isFaceMaterial, objectMaterials, material, side;

		_face3Count = 0;
		_face4Count = 0;
		_lineCount = 0;
		_particleCount = 0;

		_renderData.elements.length = 0;

		scene.updateMatrixWorld();

		if ( camera.parent === undefined ) camera.updateMatrixWorld();

		camera.matrixWorldInverse.getInverse( camera.matrixWorld );

		_viewProjectionMatrix.multiply( camera.projectionMatrix, camera.matrixWorldInverse );

		_frustum.setFromMatrix( _viewProjectionMatrix );

		_renderData = projectGraph( scene, sortObjects );

		for ( o = 0, ol = _renderData.objects.length; o < ol; o ++ ) {

			object = _renderData.objects[ o ].object;

			modelMatrix = object.matrixWorld;

			_vertexCount = 0;

			if ( object instanceof THREE.Mesh ) {

				geometry = object.geometry;

				vertices = geometry.vertices;
				faces = geometry.faces;
				faceVertexUvs = geometry.faceVertexUvs;

				_normalMatrix.getInverse( modelMatrix );
				_normalMatrix.transpose();

				isFaceMaterial = object.material instanceof THREE.MeshFaceMaterial;
				objectMaterials = isFaceMaterial === true ? object.material : null;

				side = object.material.side;

				for ( v = 0, vl = vertices.length; v < vl; v ++ ) {

					_vertex = getNextVertexInPool();
					_vertex.positionWorld.copy( vertices[ v ] );

					modelMatrix.multiplyVector3( _vertex.positionWorld );

					_vertex.positionScreen.copy( _vertex.positionWorld );
					_viewProjectionMatrix.multiplyVector4( _vertex.positionScreen );

					_vertex.positionScreen.x /= _vertex.positionScreen.w;
					_vertex.positionScreen.y /= _vertex.positionScreen.w;

					_vertex.visible = _vertex.positionScreen.z > near && _vertex.positionScreen.z < far;

				}

				for ( f = 0, fl = faces.length; f < fl; f ++ ) {

					face = faces[ f ];

					material = isFaceMaterial === true ? objectMaterials.materials[ face.materialIndex ] : object.material;

					if ( material === undefined ) continue;

					side = material.side;

					if ( face instanceof THREE.Face3 ) {

						v1 = _vertexPool[ face.a ];
						v2 = _vertexPool[ face.b ];
						v3 = _vertexPool[ face.c ];

						if ( v1.visible === true && v2.visible === true && v3.visible === true ) {

							visible = ( ( v3.positionScreen.x - v1.positionScreen.x ) * ( v2.positionScreen.y - v1.positionScreen.y ) -
								( v3.positionScreen.y - v1.positionScreen.y ) * ( v2.positionScreen.x - v1.positionScreen.x ) ) < 0;

							if ( side === THREE.DoubleSide || visible === ( side === THREE.FrontSide ) ) {

								_face = getNextFace3InPool();

								_face.v1.copy( v1 );
								_face.v2.copy( v2 );
								_face.v3.copy( v3 );

							} else {

								continue;

							}

						} else {

							continue;

						}

					} else if ( face instanceof THREE.Face4 ) {

						v1 = _vertexPool[ face.a ];
						v2 = _vertexPool[ face.b ];
						v3 = _vertexPool[ face.c ];
						v4 = _vertexPool[ face.d ];

						if ( v1.visible === true && v2.visible === true && v3.visible === true && v4.visible === true ) {

							visible = ( v4.positionScreen.x - v1.positionScreen.x ) * ( v2.positionScreen.y - v1.positionScreen.y ) -
								( v4.positionScreen.y - v1.positionScreen.y ) * ( v2.positionScreen.x - v1.positionScreen.x ) < 0 ||
								( v2.positionScreen.x - v3.positionScreen.x ) * ( v4.positionScreen.y - v3.positionScreen.y ) -
								( v2.positionScreen.y - v3.positionScreen.y ) * ( v4.positionScreen.x - v3.positionScreen.x ) < 0;


							if ( side === THREE.DoubleSide || visible === ( side === THREE.FrontSide ) ) {

								_face = getNextFace4InPool();

								_face.v1.copy( v1 );
								_face.v2.copy( v2 );
								_face.v3.copy( v3 );
								_face.v4.copy( v4 );

							} else {

								continue;

							}

						} else {

							continue;

						}

					}

					_face.normalWorld.copy( face.normal );

					if ( visible === false && ( side === THREE.BackSide || side === THREE.DoubleSide ) ) _face.normalWorld.negate();
					_normalMatrix.multiplyVector3( _face.normalWorld ).normalize();

					_face.centroidWorld.copy( face.centroid );
					modelMatrix.multiplyVector3( _face.centroidWorld );

					_face.centroidScreen.copy( _face.centroidWorld );
					_viewProjectionMatrix.multiplyVector3( _face.centroidScreen );

					faceVertexNormals = face.vertexNormals;

					for ( n = 0, nl = faceVertexNormals.length; n < nl; n ++ ) {

						normal = _face.vertexNormalsWorld[ n ];
						normal.copy( faceVertexNormals[ n ] );

						if ( visible === false && ( side === THREE.BackSide || side === THREE.DoubleSide ) ) normal.negate();

						_normalMatrix.multiplyVector3( normal ).normalize();

					}

					_face.vertexNormalsLength = faceVertexNormals.length;

					for ( c = 0, cl = faceVertexUvs.length; c < cl; c ++ ) {

						uvs = faceVertexUvs[ c ][ f ];

						if ( uvs === undefined ) continue;

						for ( u = 0, ul = uvs.length; u < ul; u ++ ) {

							_face.uvs[ c ][ u ] = uvs[ u ];

						}

					}

					_face.color = face.color;
					_face.material = material;

					_face.z = _face.centroidScreen.z;

					_renderData.elements.push( _face );

				}

			} else if ( object instanceof THREE.Line ) {

				_modelViewProjectionMatrix.multiply( _viewProjectionMatrix, modelMatrix );

				vertices = object.geometry.vertices;

				v1 = getNextVertexInPool();
				v1.positionScreen.copy( vertices[ 0 ] );
				_modelViewProjectionMatrix.multiplyVector4( v1.positionScreen );

				// Handle LineStrip and LinePieces
				var step = object.type === THREE.LinePieces ? 2 : 1;

				for ( v = 1, vl = vertices.length; v < vl; v ++ ) {

					v1 = getNextVertexInPool();
					v1.positionScreen.copy( vertices[ v ] );
					_modelViewProjectionMatrix.multiplyVector4( v1.positionScreen );

					if ( ( v + 1 ) % step > 0 ) continue;

					v2 = _vertexPool[ _vertexCount - 2 ];

					_clippedVertex1PositionScreen.copy( v1.positionScreen );
					_clippedVertex2PositionScreen.copy( v2.positionScreen );

					if ( clipLine( _clippedVertex1PositionScreen, _clippedVertex2PositionScreen ) === true ) {

						// Perform the perspective divide
						_clippedVertex1PositionScreen.multiplyScalar( 1 / _clippedVertex1PositionScreen.w );
						_clippedVertex2PositionScreen.multiplyScalar( 1 / _clippedVertex2PositionScreen.w );

						_line = getNextLineInPool();
						_line.v1.positionScreen.copy( _clippedVertex1PositionScreen );
						_line.v2.positionScreen.copy( _clippedVertex2PositionScreen );

						_line.z = Math.max( _clippedVertex1PositionScreen.z, _clippedVertex2PositionScreen.z );

						_line.material = object.material;

						_renderData.elements.push( _line );

					}

				}

			}

		}

		for ( o = 0, ol = _renderData.sprites.length; o < ol; o++ ) {

			object = _renderData.sprites[ o ].object;

			modelMatrix = object.matrixWorld;

			if ( object instanceof THREE.Particle ) {

				_vector4.set( modelMatrix.elements[12], modelMatrix.elements[13], modelMatrix.elements[14], 1 );
				_viewProjectionMatrix.multiplyVector4( _vector4 );

				_vector4.z /= _vector4.w;

				if ( _vector4.z > 0 && _vector4.z < 1 ) {

					_particle = getNextParticleInPool();
					_particle.object = object;
					_particle.x = _vector4.x / _vector4.w;
					_particle.y = _vector4.y / _vector4.w;
					_particle.z = _vector4.z;

					_particle.rotation = object.rotation.z;

					_particle.scale.x = object.scale.x * Math.abs( _particle.x - ( _vector4.x + camera.projectionMatrix.elements[0] ) / ( _vector4.w + camera.projectionMatrix.elements[12] ) );
					_particle.scale.y = object.scale.y * Math.abs( _particle.y - ( _vector4.y + camera.projectionMatrix.elements[5] ) / ( _vector4.w + camera.projectionMatrix.elements[13] ) );

					_particle.material = object.material;

					_renderData.elements.push( _particle );

				}

			}

		}

		if ( sortElements === true ) _renderData.elements.sort( painterSort );

		return _renderData;

	};

	// Pools

	function getNextObjectInPool() {

		if ( _objectCount === _objectPoolLength ) {

			var object = new THREE.RenderableObject();
			_objectPool.push( object );
			_objectPoolLength ++;
			_objectCount ++;
			return object;

		}

		return _objectPool[ _objectCount ++ ];

	}

	function getNextVertexInPool() {

		if ( _vertexCount === _vertexPoolLength ) {

			var vertex = new THREE.RenderableVertex();
			_vertexPool.push( vertex );
			_vertexPoolLength ++;
			_vertexCount ++;
			return vertex;

		}

		return _vertexPool[ _vertexCount ++ ];

	}

	function getNextFace3InPool() {

		if ( _face3Count === _face3PoolLength ) {

			var face = new THREE.RenderableFace3();
			_face3Pool.push( face );
			_face3PoolLength ++;
			_face3Count ++;
			return face;

		}

		return _face3Pool[ _face3Count ++ ];


	}

	function getNextFace4InPool() {

		if ( _face4Count === _face4PoolLength ) {

			var face = new THREE.RenderableFace4();
			_face4Pool.push( face );
			_face4PoolLength ++;
			_face4Count ++;
			return face;

		}

		return _face4Pool[ _face4Count ++ ];

	}

	function getNextLineInPool() {

		if ( _lineCount === _linePoolLength ) {

			var line = new THREE.RenderableLine();
			_linePool.push( line );
			_linePoolLength ++;
			_lineCount ++
			return line;

		}

		return _linePool[ _lineCount ++ ];

	}

	function getNextParticleInPool() {

		if ( _particleCount === _particlePoolLength ) {

			var particle = new THREE.RenderableParticle();
			_particlePool.push( particle );
			_particlePoolLength ++;
			_particleCount ++
			return particle;

		}

		return _particlePool[ _particleCount ++ ];

	}

	//

	function painterSort( a, b ) {

		return b.z - a.z;

	}

	function clipLine( s1, s2 ) {

		var alpha1 = 0, alpha2 = 1,

		// Calculate the boundary coordinate of each vertex for the near and far clip planes,
		// Z = -1 and Z = +1, respectively.
		bc1near =  s1.z + s1.w,
		bc2near =  s2.z + s2.w,
		bc1far =  - s1.z + s1.w,
		bc2far =  - s2.z + s2.w;

		if ( bc1near >= 0 && bc2near >= 0 && bc1far >= 0 && bc2far >= 0 ) {

			// Both vertices lie entirely within all clip planes.
			return true;

		} else if ( ( bc1near < 0 && bc2near < 0) || (bc1far < 0 && bc2far < 0 ) ) {

			// Both vertices lie entirely outside one of the clip planes.
			return false;

		} else {

			// The line segment spans at least one clip plane.

			if ( bc1near < 0 ) {

				// v1 lies outside the near plane, v2 inside
				alpha1 = Math.max( alpha1, bc1near / ( bc1near - bc2near ) );

			} else if ( bc2near < 0 ) {

				// v2 lies outside the near plane, v1 inside
				alpha2 = Math.min( alpha2, bc1near / ( bc1near - bc2near ) );

			}

			if ( bc1far < 0 ) {

				// v1 lies outside the far plane, v2 inside
				alpha1 = Math.max( alpha1, bc1far / ( bc1far - bc2far ) );

			} else if ( bc2far < 0 ) {

				// v2 lies outside the far plane, v2 inside
				alpha2 = Math.min( alpha2, bc1far / ( bc1far - bc2far ) );

			}

			if ( alpha2 < alpha1 ) {

				// The line segment spans two boundaries, but is outside both of them.
				// (This can't happen when we're only clipping against just near/far but good
				//  to leave the check here for future usage if other clip planes are added.)
				return false;

			} else {

				// Update the s1 and s2 vertices to match the clipped line segment.
				s1.lerpSelf( s2, alpha1 );
				s2.lerpSelf( s1, 1 - alpha2 );

				return true;

			}

		}

	}

};
/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 * @author WestLangley / http://github.com/WestLangley
 */

THREE.Quaternion = function( x, y, z, w ) {

	this.x = x || 0;
	this.y = y || 0;
	this.z = z || 0;
	this.w = ( w !== undefined ) ? w : 1;

};

THREE.Quaternion.prototype = {

	constructor: THREE.Quaternion,

	set: function ( x, y, z, w ) {

		this.x = x;
		this.y = y;
		this.z = z;
		this.w = w;

		return this;

	},

	copy: function ( q ) {

		this.x = q.x;
		this.y = q.y;
		this.z = q.z;
		this.w = q.w;

		return this;

	},

	setFromEuler: function ( v, order ) {

		// http://www.mathworks.com/matlabcentral/fileexchange/
		// 	20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/
		//	content/SpinCalc.m

		var c1 = Math.cos( v.x / 2 );
		var c2 = Math.cos( v.y / 2 );
		var c3 = Math.cos( v.z / 2 );
		var s1 = Math.sin( v.x / 2 );
		var s2 = Math.sin( v.y / 2 );
		var s3 = Math.sin( v.z / 2 );

		if ( order === undefined || order === 'XYZ' ) {

			this.x = s1 * c2 * c3 + c1 * s2 * s3;
			this.y = c1 * s2 * c3 - s1 * c2 * s3;
			this.z = c1 * c2 * s3 + s1 * s2 * c3;
			this.w = c1 * c2 * c3 - s1 * s2 * s3;

		} else if ( order === 'YXZ' ) {

			this.x = s1 * c2 * c3 + c1 * s2 * s3;
			this.y = c1 * s2 * c3 - s1 * c2 * s3;
			this.z = c1 * c2 * s3 - s1 * s2 * c3;
			this.w = c1 * c2 * c3 + s1 * s2 * s3;

		} else if ( order === 'ZXY' ) {

			this.x = s1 * c2 * c3 - c1 * s2 * s3;
			this.y = c1 * s2 * c3 + s1 * c2 * s3;
			this.z = c1 * c2 * s3 + s1 * s2 * c3;
			this.w = c1 * c2 * c3 - s1 * s2 * s3;

		} else if ( order === 'ZYX' ) {

			this.x = s1 * c2 * c3 - c1 * s2 * s3;
			this.y = c1 * s2 * c3 + s1 * c2 * s3;
			this.z = c1 * c2 * s3 - s1 * s2 * c3;
			this.w = c1 * c2 * c3 + s1 * s2 * s3;

		} else if ( order === 'YZX' ) {

			this.x = s1 * c2 * c3 + c1 * s2 * s3;
			this.y = c1 * s2 * c3 + s1 * c2 * s3;
			this.z = c1 * c2 * s3 - s1 * s2 * c3;
			this.w = c1 * c2 * c3 - s1 * s2 * s3;

		} else if ( order === 'XZY' ) {

			this.x = s1 * c2 * c3 - c1 * s2 * s3;
			this.y = c1 * s2 * c3 - s1 * c2 * s3;
			this.z = c1 * c2 * s3 + s1 * s2 * c3;
			this.w = c1 * c2 * c3 + s1 * s2 * s3;

		}

		return this;

	},

	setFromAxisAngle: function ( axis, angle ) {

		// from http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm
		// axis have to be normalized

		var halfAngle = angle / 2,
			s = Math.sin( halfAngle );

		this.x = axis.x * s;
		this.y = axis.y * s;
		this.z = axis.z * s;
		this.w = Math.cos( halfAngle );

		return this;

	},

	setFromRotationMatrix: function ( m ) {

		// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm

		// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

		var te = m.elements,

			m11 = te[0], m12 = te[4], m13 = te[8],
			m21 = te[1], m22 = te[5], m23 = te[9],
			m31 = te[2], m32 = te[6], m33 = te[10],

			trace = m11 + m22 + m33,
			s;

		if( trace > 0 ) {

			s = 0.5 / Math.sqrt( trace + 1.0 );

			this.w = 0.25 / s;
			this.x = ( m32 - m23 ) * s;
			this.y = ( m13 - m31 ) * s;
			this.z = ( m21 - m12 ) * s;

		} else if ( m11 > m22 && m11 > m33 ) {

			s = 2.0 * Math.sqrt( 1.0 + m11 - m22 - m33 );

			this.w = (m32 - m23 ) / s;
			this.x = 0.25 * s;
			this.y = (m12 + m21 ) / s;
			this.z = (m13 + m31 ) / s;

		} else if (m22 > m33) {

			s = 2.0 * Math.sqrt( 1.0 + m22 - m11 - m33 );

			this.w = (m13 - m31 ) / s;
			this.x = (m12 + m21 ) / s;
			this.y = 0.25 * s;
			this.z = (m23 + m32 ) / s;

		} else {

			s = 2.0 * Math.sqrt( 1.0 + m33 - m11 - m22 );

			this.w = ( m21 - m12 ) / s;
			this.x = ( m13 + m31 ) / s;
			this.y = ( m23 + m32 ) / s;
			this.z = 0.25 * s;

		}

		return this;

	},

	inverse: function () {

		this.conjugate().normalize();

		return this;

	},

	conjugate: function () {

		this.x *= -1;
		this.y *= -1;
		this.z *= -1;

		return this;

	},

	length: function () {

		return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w );

	},

	normalize: function () {

		var l = Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w );

		if ( l === 0 ) {

			this.x = 0;
			this.y = 0;
			this.z = 0;
			this.w = 1;

		} else {

			l = 1 / l;

			this.x = this.x * l;
			this.y = this.y * l;
			this.z = this.z * l;
			this.w = this.w * l;

		}

		return this;

	},

	multiply: function ( a, b ) {

		// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm
		var qax = a.x, qay = a.y, qaz = a.z, qaw = a.w,
		qbx = b.x, qby = b.y, qbz = b.z, qbw = b.w;

		this.x =  qax * qbw + qay * qbz - qaz * qby + qaw * qbx;
		this.y = -qax * qbz + qay * qbw + qaz * qbx + qaw * qby;
		this.z =  qax * qby - qay * qbx + qaz * qbw + qaw * qbz;
		this.w = -qax * qbx - qay * qby - qaz * qbz + qaw * qbw;

		return this;

	},

	multiplySelf: function ( b ) {

		var qax = this.x, qay = this.y, qaz = this.z, qaw = this.w,
		qbx = b.x, qby = b.y, qbz = b.z, qbw = b.w;

		this.x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
		this.y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
		this.z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
		this.w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;

		return this;

	},

	multiplyVector3: function ( vector, dest ) {

		if ( !dest ) { dest = vector; }

		var x    = vector.x,  y  = vector.y,  z  = vector.z,
			qx   = this.x, qy = this.y, qz = this.z, qw = this.w;

		// calculate quat * vector

		var ix =  qw * x + qy * z - qz * y,
			iy =  qw * y + qz * x - qx * z,
			iz =  qw * z + qx * y - qy * x,
			iw = -qx * x - qy * y - qz * z;

		// calculate result * inverse quat

		dest.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;
		dest.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;
		dest.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;

		return dest;

	},

	slerpSelf: function ( qb, t ) {

		var x = this.x, y = this.y, z = this.z, w = this.w;

		// http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/

		var cosHalfTheta = w * qb.w + x * qb.x + y * qb.y + z * qb.z;

		if ( cosHalfTheta < 0 ) {

			this.w = -qb.w;
			this.x = -qb.x;
			this.y = -qb.y;
			this.z = -qb.z;

			cosHalfTheta = -cosHalfTheta;

		} else {

			this.copy( qb );

		}

		if ( cosHalfTheta >= 1.0 ) {

			this.w = w;
			this.x = x;
			this.y = y;
			this.z = z;

			return this;

		}

		var halfTheta = Math.acos( cosHalfTheta );
		var sinHalfTheta = Math.sqrt( 1.0 - cosHalfTheta * cosHalfTheta );

		if ( Math.abs( sinHalfTheta ) < 0.001 ) {

			this.w = 0.5 * ( w + this.w );
			this.x = 0.5 * ( x + this.x );
			this.y = 0.5 * ( y + this.y );
			this.z = 0.5 * ( z + this.z );

			return this;

		}

		var ratioA = Math.sin( ( 1 - t ) * halfTheta ) / sinHalfTheta,
		ratioB = Math.sin( t * halfTheta ) / sinHalfTheta;

		this.w = ( w * ratioA + this.w * ratioB );
		this.x = ( x * ratioA + this.x * ratioB );
		this.y = ( y * ratioA + this.y * ratioB );
		this.z = ( z * ratioA + this.z * ratioB );

		return this;

	},

	clone: function () {

		return new THREE.Quaternion( this.x, this.y, this.z, this.w );

	}

}

THREE.Quaternion.slerp = function ( qa, qb, qm, t ) {

	// http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/

	var cosHalfTheta = qa.w * qb.w + qa.x * qb.x + qa.y * qb.y + qa.z * qb.z;

	if ( cosHalfTheta < 0 ) {

		qm.w = -qb.w;
		qm.x = -qb.x;
		qm.y = -qb.y;
		qm.z = -qb.z;

		cosHalfTheta = -cosHalfTheta;

	} else {

		qm.copy( qb );

	}

	if ( Math.abs( cosHalfTheta ) >= 1.0 ) {

		qm.w = qa.w;
		qm.x = qa.x;
		qm.y = qa.y;
		qm.z = qa.z;

		return qm;

	}

	var halfTheta = Math.acos( cosHalfTheta );
	var sinHalfTheta = Math.sqrt( 1.0 - cosHalfTheta * cosHalfTheta );

	if ( Math.abs( sinHalfTheta ) < 0.001 ) {

		qm.w = 0.5 * ( qa.w + qm.w );
		qm.x = 0.5 * ( qa.x + qm.x );
		qm.y = 0.5 * ( qa.y + qm.y );
		qm.z = 0.5 * ( qa.z + qm.z );

		return qm;

	}

	var ratioA = Math.sin( ( 1 - t ) * halfTheta ) / sinHalfTheta;
	var ratioB = Math.sin( t * halfTheta ) / sinHalfTheta;

	qm.w = ( qa.w * ratioA + qm.w * ratioB );
	qm.x = ( qa.x * ratioA + qm.x * ratioB );
	qm.y = ( qa.y * ratioA + qm.y * ratioB );
	qm.z = ( qa.z * ratioA + qm.z * ratioB );

	return qm;

}
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.Vertex = function ( v ) {

	console.warn( 'THREE.Vertex has been DEPRECATED. Use THREE.Vector3 instead.')
	return v;

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Face3 = function ( a, b, c, normal, color, materialIndex ) {

	this.a = a;
	this.b = b;
	this.c = c;

	this.normal = normal instanceof THREE.Vector3 ? normal : new THREE.Vector3();
	this.vertexNormals = normal instanceof Array ? normal : [ ];

	this.color = color instanceof THREE.Color ? color : new THREE.Color();
	this.vertexColors = color instanceof Array ? color : [];

	this.vertexTangents = [];

	this.materialIndex = materialIndex;

	this.centroid = new THREE.Vector3();

};

THREE.Face3.prototype = {

	constructor: THREE.Face3,

	clone: function () {

		var face = new THREE.Face3( this.a, this.b, this.c );

		face.normal.copy( this.normal );
		face.color.copy( this.color );
		face.centroid.copy( this.centroid );

		face.materialIndex = this.materialIndex;

		var i, il;
		for ( i = 0, il = this.vertexNormals.length; i < il; i ++ ) face.vertexNormals[ i ] = this.vertexNormals[ i ].clone();
		for ( i = 0, il = this.vertexColors.length; i < il; i ++ ) face.vertexColors[ i ] = this.vertexColors[ i ].clone();
		for ( i = 0, il = this.vertexTangents.length; i < il; i ++ ) face.vertexTangents[ i ] = this.vertexTangents[ i ].clone();

		return face;

	}

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Face4 = function ( a, b, c, d, normal, color, materialIndex ) {

	this.a = a;
	this.b = b;
	this.c = c;
	this.d = d;

	this.normal = normal instanceof THREE.Vector3 ? normal : new THREE.Vector3();
	this.vertexNormals = normal instanceof Array ? normal : [ ];

	this.color = color instanceof THREE.Color ? color : new THREE.Color();
	this.vertexColors = color instanceof Array ? color : [];

	this.vertexTangents = [];

	this.materialIndex = materialIndex;

	this.centroid = new THREE.Vector3();

};

THREE.Face4.prototype = {

	constructor: THREE.Face4,

	clone: function () {

		var face = new THREE.Face4( this.a, this.b, this.c, this.d );

		face.normal.copy( this.normal );
		face.color.copy( this.color );
		face.centroid.copy( this.centroid );

		face.materialIndex = this.materialIndex;

		var i, il;
		for ( i = 0, il = this.vertexNormals.length; i < il; i ++ ) face.vertexNormals[ i ] = this.vertexNormals[ i ].clone();
		for ( i = 0, il = this.vertexColors.length; i < il; i ++ ) face.vertexColors[ i ] = this.vertexColors[ i ].clone();
		for ( i = 0, il = this.vertexTangents.length; i < il; i ++ ) face.vertexTangents[ i ] = this.vertexTangents[ i ].clone();

		return face;

	}

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.UV = function ( u, v ) {

	this.u = u || 0;
	this.v = v || 0;

};

THREE.UV.prototype = {

	constructor: THREE.UV,

	set: function ( u, v ) {

		this.u = u;
		this.v = v;

		return this;

	},

	copy: function ( uv ) {

		this.u = uv.u;
		this.v = uv.v;

		return this;

	},

	lerpSelf: function ( uv, alpha ) {

		this.u += ( uv.u - this.u ) * alpha;
		this.v += ( uv.v - this.v ) * alpha;

		return this;

	},

	clone: function () {

		return new THREE.UV( this.u, this.v );

	}

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author kile / http://kile.stravaganza.org/
 * @author alteredq / http://alteredqualia.com/
 * @author mikael emtinger / http://gomo.se/
 * @author zz85 / http://www.lab4games.net/zz85/blog
 */

THREE.Geometry = function () {

	THREE.GeometryLibrary.push( this );

	this.id = THREE.GeometryIdCount ++;

	this.name = '';

	this.vertices = [];
	this.colors = [];  // one-to-one vertex colors, used in ParticleSystem, Line and Ribbon
	this.normals = []; // one-to-one vertex normals, used in Ribbon

	this.faces = [];

	this.faceUvs = [[]];
	this.faceVertexUvs = [[]];

	this.morphTargets = [];
	this.morphColors = [];
	this.morphNormals = [];

	this.skinWeights = [];
	this.skinIndices = [];

	this.lineDistances = [];

	this.boundingBox = null;
	this.boundingSphere = null;

	this.hasTangents = false;

	this.dynamic = true; // the intermediate typed arrays will be deleted when set to false

	// update flags

	this.verticesNeedUpdate = false;
	this.elementsNeedUpdate = false;
	this.uvsNeedUpdate = false;
	this.normalsNeedUpdate = false;
	this.tangentsNeedUpdate = false;
	this.colorsNeedUpdate = false;
	this.lineDistancesNeedUpdate = false;

	this.buffersNeedUpdate = false;

};

THREE.Geometry.prototype = {

	constructor : THREE.Geometry,

	applyMatrix: function ( matrix ) {

		var normalMatrix = new THREE.Matrix3();

		normalMatrix.getInverse( matrix ).transpose();

		for ( var i = 0, il = this.vertices.length; i < il; i ++ ) {

			var vertex = this.vertices[ i ];

			matrix.multiplyVector3( vertex );

		}

		for ( var i = 0, il = this.faces.length; i < il; i ++ ) {

			var face = this.faces[ i ];

			normalMatrix.multiplyVector3( face.normal ).normalize();

			for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {

				normalMatrix.multiplyVector3( face.vertexNormals[ j ] ).normalize();

			}

			matrix.multiplyVector3( face.centroid );

		}

	},

	computeCentroids: function () {

		var f, fl, face;

		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

			face = this.faces[ f ];
			face.centroid.set( 0, 0, 0 );

			if ( face instanceof THREE.Face3 ) {

				face.centroid.addSelf( this.vertices[ face.a ] );
				face.centroid.addSelf( this.vertices[ face.b ] );
				face.centroid.addSelf( this.vertices[ face.c ] );
				face.centroid.divideScalar( 3 );

			} else if ( face instanceof THREE.Face4 ) {

				face.centroid.addSelf( this.vertices[ face.a ] );
				face.centroid.addSelf( this.vertices[ face.b ] );
				face.centroid.addSelf( this.vertices[ face.c ] );
				face.centroid.addSelf( this.vertices[ face.d ] );
				face.centroid.divideScalar( 4 );

			}

		}

	},

	computeFaceNormals: function () {

		var n, nl, v, vl, vertex, f, fl, face, vA, vB, vC,
		cb = new THREE.Vector3(), ab = new THREE.Vector3();

		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

			face = this.faces[ f ];

			vA = this.vertices[ face.a ];
			vB = this.vertices[ face.b ];
			vC = this.vertices[ face.c ];

			cb.sub( vC, vB );
			ab.sub( vA, vB );
			cb.crossSelf( ab );

			cb.normalize();

			face.normal.copy( cb );

		}

	},

	computeVertexNormals: function ( areaWeighted ) {

		var v, vl, f, fl, face, vertices;

		// create internal buffers for reuse when calling this method repeatedly
		// (otherwise memory allocation / deallocation every frame is big resource hog)

		if ( this.__tmpVertices === undefined ) {

			this.__tmpVertices = new Array( this.vertices.length );
			vertices = this.__tmpVertices;

			for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {

				vertices[ v ] = new THREE.Vector3();

			}

			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

				face = this.faces[ f ];

				if ( face instanceof THREE.Face3 ) {

					face.vertexNormals = [ new THREE.Vector3(), new THREE.Vector3(), new THREE.Vector3() ];

				} else if ( face instanceof THREE.Face4 ) {

					face.vertexNormals = [ new THREE.Vector3(), new THREE.Vector3(), new THREE.Vector3(), new THREE.Vector3() ];

				}

			}

		} else {

			vertices = this.__tmpVertices;

			for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {

				vertices[ v ].set( 0, 0, 0 );

			}

		}

		if ( areaWeighted ) {

			// vertex normals weighted by triangle areas
			// http://www.iquilezles.org/www/articles/normals/normals.htm

			var vA, vB, vC, vD;
			var cb = new THREE.Vector3(), ab = new THREE.Vector3(),
				db = new THREE.Vector3(), dc = new THREE.Vector3(), bc = new THREE.Vector3();

			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

				face = this.faces[ f ];

				if ( face instanceof THREE.Face3 ) {

					vA = this.vertices[ face.a ];
					vB = this.vertices[ face.b ];
					vC = this.vertices[ face.c ];

					cb.sub( vC, vB );
					ab.sub( vA, vB );
					cb.crossSelf( ab );

					vertices[ face.a ].addSelf( cb );
					vertices[ face.b ].addSelf( cb );
					vertices[ face.c ].addSelf( cb );

				} else if ( face instanceof THREE.Face4 ) {

					vA = this.vertices[ face.a ];
					vB = this.vertices[ face.b ];
					vC = this.vertices[ face.c ];
					vD = this.vertices[ face.d ];

					// abd

					db.sub( vD, vB );
					ab.sub( vA, vB );
					db.crossSelf( ab );

					vertices[ face.a ].addSelf( db );
					vertices[ face.b ].addSelf( db );
					vertices[ face.d ].addSelf( db );

					// bcd

					dc.sub( vD, vC );
					bc.sub( vB, vC );
					dc.crossSelf( bc );

					vertices[ face.b ].addSelf( dc );
					vertices[ face.c ].addSelf( dc );
					vertices[ face.d ].addSelf( dc );

				}

			}

		} else {

			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

				face = this.faces[ f ];

				if ( face instanceof THREE.Face3 ) {

					vertices[ face.a ].addSelf( face.normal );
					vertices[ face.b ].addSelf( face.normal );
					vertices[ face.c ].addSelf( face.normal );

				} else if ( face instanceof THREE.Face4 ) {

					vertices[ face.a ].addSelf( face.normal );
					vertices[ face.b ].addSelf( face.normal );
					vertices[ face.c ].addSelf( face.normal );
					vertices[ face.d ].addSelf( face.normal );

				}

			}

		}

		for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {

			vertices[ v ].normalize();

		}

		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

			face = this.faces[ f ];

			if ( face instanceof THREE.Face3 ) {

				face.vertexNormals[ 0 ].copy( vertices[ face.a ] );
				face.vertexNormals[ 1 ].copy( vertices[ face.b ] );
				face.vertexNormals[ 2 ].copy( vertices[ face.c ] );

			} else if ( face instanceof THREE.Face4 ) {

				face.vertexNormals[ 0 ].copy( vertices[ face.a ] );
				face.vertexNormals[ 1 ].copy( vertices[ face.b ] );
				face.vertexNormals[ 2 ].copy( vertices[ face.c ] );
				face.vertexNormals[ 3 ].copy( vertices[ face.d ] );

			}

		}

	},

	computeMorphNormals: function () {

		var i, il, f, fl, face;

		// save original normals
		// - create temp variables on first access
		//   otherwise just copy (for faster repeated calls)

		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

			face = this.faces[ f ];

			if ( ! face.__originalFaceNormal ) {

				face.__originalFaceNormal = face.normal.clone();

			} else {

				face.__originalFaceNormal.copy( face.normal );

			}

			if ( ! face.__originalVertexNormals ) face.__originalVertexNormals = [];

			for ( i = 0, il = face.vertexNormals.length; i < il; i ++ ) {

				if ( ! face.__originalVertexNormals[ i ] ) {

					face.__originalVertexNormals[ i ] = face.vertexNormals[ i ].clone();

				} else {

					face.__originalVertexNormals[ i ].copy( face.vertexNormals[ i ] );

				}

			}

		}

		// use temp geometry to compute face and vertex normals for each morph

		var tmpGeo = new THREE.Geometry();
		tmpGeo.faces = this.faces;

		for ( i = 0, il = this.morphTargets.length; i < il; i ++ ) {

			// create on first access

			if ( ! this.morphNormals[ i ] ) {

				this.morphNormals[ i ] = {};
				this.morphNormals[ i ].faceNormals = [];
				this.morphNormals[ i ].vertexNormals = [];

				var dstNormalsFace = this.morphNormals[ i ].faceNormals;
				var dstNormalsVertex = this.morphNormals[ i ].vertexNormals;

				var faceNormal, vertexNormals;

				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

					face = this.faces[ f ];

					faceNormal = new THREE.Vector3();

					if ( face instanceof THREE.Face3 ) {

						vertexNormals = { a: new THREE.Vector3(), b: new THREE.Vector3(), c: new THREE.Vector3() };

					} else {

						vertexNormals = { a: new THREE.Vector3(), b: new THREE.Vector3(), c: new THREE.Vector3(), d: new THREE.Vector3() };

					}

					dstNormalsFace.push( faceNormal );
					dstNormalsVertex.push( vertexNormals );

				}

			}

			var morphNormals = this.morphNormals[ i ];

			// set vertices to morph target

			tmpGeo.vertices = this.morphTargets[ i ].vertices;

			// compute morph normals

			tmpGeo.computeFaceNormals();
			tmpGeo.computeVertexNormals();

			// store morph normals

			var faceNormal, vertexNormals;

			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

				face = this.faces[ f ];

				faceNormal = morphNormals.faceNormals[ f ];
				vertexNormals = morphNormals.vertexNormals[ f ];

				faceNormal.copy( face.normal );

				if ( face instanceof THREE.Face3 ) {

					vertexNormals.a.copy( face.vertexNormals[ 0 ] );
					vertexNormals.b.copy( face.vertexNormals[ 1 ] );
					vertexNormals.c.copy( face.vertexNormals[ 2 ] );

				} else {

					vertexNormals.a.copy( face.vertexNormals[ 0 ] );
					vertexNormals.b.copy( face.vertexNormals[ 1 ] );
					vertexNormals.c.copy( face.vertexNormals[ 2 ] );
					vertexNormals.d.copy( face.vertexNormals[ 3 ] );

				}

			}

		}

		// restore original normals

		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

			face = this.faces[ f ];

			face.normal = face.__originalFaceNormal;
			face.vertexNormals = face.__originalVertexNormals;

		}

	},

	computeTangents: function () {

		// based on http://www.terathon.com/code/tangent.html
		// tangents go to vertices

		var f, fl, v, vl, i, il, vertexIndex,
			face, uv, vA, vB, vC, uvA, uvB, uvC,
			x1, x2, y1, y2, z1, z2,
			s1, s2, t1, t2, r, t, test,
			tan1 = [], tan2 = [],
			sdir = new THREE.Vector3(), tdir = new THREE.Vector3(),
			tmp = new THREE.Vector3(), tmp2 = new THREE.Vector3(),
			n = new THREE.Vector3(), w;

		for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {

			tan1[ v ] = new THREE.Vector3();
			tan2[ v ] = new THREE.Vector3();

		}

		function handleTriangle( context, a, b, c, ua, ub, uc ) {

			vA = context.vertices[ a ];
			vB = context.vertices[ b ];
			vC = context.vertices[ c ];

			uvA = uv[ ua ];
			uvB = uv[ ub ];
			uvC = uv[ uc ];

			x1 = vB.x - vA.x;
			x2 = vC.x - vA.x;
			y1 = vB.y - vA.y;
			y2 = vC.y - vA.y;
			z1 = vB.z - vA.z;
			z2 = vC.z - vA.z;

			s1 = uvB.u - uvA.u;
			s2 = uvC.u - uvA.u;
			t1 = uvB.v - uvA.v;
			t2 = uvC.v - uvA.v;

			r = 1.0 / ( s1 * t2 - s2 * t1 );
			sdir.set( ( t2 * x1 - t1 * x2 ) * r,
					  ( t2 * y1 - t1 * y2 ) * r,
					  ( t2 * z1 - t1 * z2 ) * r );
			tdir.set( ( s1 * x2 - s2 * x1 ) * r,
					  ( s1 * y2 - s2 * y1 ) * r,
					  ( s1 * z2 - s2 * z1 ) * r );

			tan1[ a ].addSelf( sdir );
			tan1[ b ].addSelf( sdir );
			tan1[ c ].addSelf( sdir );

			tan2[ a ].addSelf( tdir );
			tan2[ b ].addSelf( tdir );
			tan2[ c ].addSelf( tdir );

		}

		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

			face = this.faces[ f ];
			uv = this.faceVertexUvs[ 0 ][ f ]; // use UV layer 0 for tangents

			if ( face instanceof THREE.Face3 ) {

				handleTriangle( this, face.a, face.b, face.c, 0, 1, 2 );

			} else if ( face instanceof THREE.Face4 ) {

				handleTriangle( this, face.a, face.b, face.d, 0, 1, 3 );
				handleTriangle( this, face.b, face.c, face.d, 1, 2, 3 );

			}

		}

		var faceIndex = [ 'a', 'b', 'c', 'd' ];

		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

			face = this.faces[ f ];

			for ( i = 0; i < face.vertexNormals.length; i++ ) {

				n.copy( face.vertexNormals[ i ] );

				vertexIndex = face[ faceIndex[ i ] ];

				t = tan1[ vertexIndex ];

				// Gram-Schmidt orthogonalize

				tmp.copy( t );
				tmp.subSelf( n.multiplyScalar( n.dot( t ) ) ).normalize();

				// Calculate handedness

				tmp2.cross( face.vertexNormals[ i ], t );
				test = tmp2.dot( tan2[ vertexIndex ] );
				w = (test < 0.0) ? -1.0 : 1.0;

				face.vertexTangents[ i ] = new THREE.Vector4( tmp.x, tmp.y, tmp.z, w );

			}

		}

		this.hasTangents = true;

	},

	computeLineDistances: function ( ) {

		var d = 0;
		var vertices = this.vertices;

		for ( var i = 0, il = vertices.length; i < il; i ++ ) {

			if ( i > 0 ) {

				d += vertices[ i ].distanceTo( vertices[ i - 1 ] );

			}

			this.lineDistances[ i ] = d;

		}

	},

	computeBoundingBox: function () {

		if ( ! this.boundingBox ) {

			this.boundingBox = { min: new THREE.Vector3(), max: new THREE.Vector3() };

		}

		if ( this.vertices.length > 0 ) {

			var position, firstPosition = this.vertices[ 0 ];

			this.boundingBox.min.copy( firstPosition );
			this.boundingBox.max.copy( firstPosition );

			var min = this.boundingBox.min,
				max = this.boundingBox.max;

			for ( var v = 1, vl = this.vertices.length; v < vl; v ++ ) {

				position = this.vertices[ v ];

				if ( position.x < min.x ) {

					min.x = position.x;

				} else if ( position.x > max.x ) {

					max.x = position.x;

				}

				if ( position.y < min.y ) {

					min.y = position.y;

				} else if ( position.y > max.y ) {

					max.y = position.y;

				}

				if ( position.z < min.z ) {

					min.z = position.z;

				} else if ( position.z > max.z ) {

					max.z = position.z;

				}

			}

		} else {

			this.boundingBox.min.set( 0, 0, 0 );
			this.boundingBox.max.set( 0, 0, 0 );

		}

	},

	computeBoundingSphere: function () {

		var maxRadiusSq = 0;

		if ( this.boundingSphere === null ) this.boundingSphere = { radius: 0 };

		for ( var i = 0, l = this.vertices.length; i < l; i ++ ) {

			var radiusSq = this.vertices[ i ].lengthSq();
			if ( radiusSq > maxRadiusSq ) maxRadiusSq = radiusSq;

		}

		this.boundingSphere.radius = Math.sqrt( maxRadiusSq );

	},

	/*
	 * Checks for duplicate vertices with hashmap.
	 * Duplicated vertices are removed
	 * and faces' vertices are updated.
	 */

	mergeVertices: function () {

		var verticesMap = {}; // Hashmap for looking up vertice by position coordinates (and making sure they are unique)
		var unique = [], changes = [];

		var v, key;
		var precisionPoints = 4; // number of decimal points, eg. 4 for epsilon of 0.0001
		var precision = Math.pow( 10, precisionPoints );
		var i,il, face;
		var abcd = 'abcd', o, k, j, jl, u;

		for ( i = 0, il = this.vertices.length; i < il; i ++ ) {

			v = this.vertices[ i ];
			key = [ Math.round( v.x * precision ), Math.round( v.y * precision ), Math.round( v.z * precision ) ].join( '_' );

			if ( verticesMap[ key ] === undefined ) {

				verticesMap[ key ] = i;
				unique.push( this.vertices[ i ] );
				changes[ i ] = unique.length - 1;

			} else {

				//console.log('Duplicate vertex found. ', i, ' could be using ', verticesMap[key]);
				changes[ i ] = changes[ verticesMap[ key ] ];

			}

		};


		// Start to patch face indices

		for( i = 0, il = this.faces.length; i < il; i ++ ) {

			face = this.faces[ i ];

			if ( face instanceof THREE.Face3 ) {

				face.a = changes[ face.a ];
				face.b = changes[ face.b ];
				face.c = changes[ face.c ];

			} else if ( face instanceof THREE.Face4 ) {

				face.a = changes[ face.a ];
				face.b = changes[ face.b ];
				face.c = changes[ face.c ];
				face.d = changes[ face.d ];

				// check dups in (a, b, c, d) and convert to -> face3

				o = [ face.a, face.b, face.c, face.d ];

				for ( k = 3; k > 0; k -- ) {

					if ( o.indexOf( face[ abcd[ k ] ] ) !== k ) {

						// console.log('faces', face.a, face.b, face.c, face.d, 'dup at', k);

						o.splice( k, 1 );

						this.faces[ i ] = new THREE.Face3( o[0], o[1], o[2], face.normal, face.color, face.materialIndex );

						for ( j = 0, jl = this.faceVertexUvs.length; j < jl; j ++ ) {

							u = this.faceVertexUvs[ j ][ i ];
							if ( u ) u.splice( k, 1 );

						}

						this.faces[ i ].vertexColors = face.vertexColors;

						break;
					}

				}

			}

		}

		// Use unique set of vertices

		var diff = this.vertices.length - unique.length;
		this.vertices = unique;
		return diff;

	},

	clone: function () {

		var geometry = new THREE.Geometry();

		var vertices = this.vertices;

		for ( var i = 0, il = vertices.length; i < il; i ++ ) {

			geometry.vertices.push( vertices[ i ].clone() );

		}

		var faces = this.faces;

		for ( var i = 0, il = faces.length; i < il; i ++ ) {

			geometry.faces.push( faces[ i ].clone() );

		}

		var uvs = this.faceVertexUvs[ 0 ];

		for ( var i = 0, il = uvs.length; i < il; i ++ ) {

			var uv = uvs[ i ], uvCopy = [];

			for ( var j = 0, jl = uv.length; j < jl; j ++ ) {

				uvCopy.push( new THREE.UV( uv[ j ].u, uv[ j ].v ) );

			}

			geometry.faceVertexUvs[ 0 ].push( uvCopy );

		}

		return geometry;

	},

	deallocate: function () {

		var index = THREE.GeometryLibrary.indexOf( this );
		if ( index !== -1 ) THREE.GeometryLibrary.splice( index, 1 );

	}

};

THREE.GeometryIdCount = 0;
THREE.GeometryLibrary = [];
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.BufferGeometry = function () {

	THREE.GeometryLibrary.push( this );

	this.id = THREE.GeometryIdCount ++;

	// attributes

	this.attributes = {};

	// attributes typed arrays are kept only if dynamic flag is set

	this.dynamic = false;

	// boundings

	this.boundingBox = null;
	this.boundingSphere = null;

	this.hasTangents = false;

	// for compatibility

	this.morphTargets = [];

};

THREE.BufferGeometry.prototype = {

	constructor : THREE.BufferGeometry,

	applyMatrix: function ( matrix ) {

		var positionArray;
		var normalArray;

		if ( this.attributes[ "position" ] ) positionArray = this.attributes[ "position" ].array;
		if ( this.attributes[ "normal" ] ) normalArray = this.attributes[ "normal" ].array;

		if ( positionArray !== undefined ) {

			matrix.multiplyVector3Array( positionArray );
			this.verticesNeedUpdate = true;

		}

		if ( normalArray !== undefined ) {

			var normalMatrix = new THREE.Matrix3();
			normalMatrix.getInverse( matrix ).transpose();

			normalMatrix.multiplyVector3Array( normalArray );

			this.normalizeNormals();

			this.normalsNeedUpdate = true;

		}

	},

	computeBoundingBox: function () {

		if ( ! this.boundingBox ) {

			this.boundingBox = {

				min: new THREE.Vector3( Infinity, Infinity, Infinity ),
				max: new THREE.Vector3( -Infinity, -Infinity, -Infinity )

			};

		}

		var positions = this.attributes[ "position" ].array;

		if ( positions ) {

			var bb = this.boundingBox;
			var x, y, z;

			for ( var i = 0, il = positions.length; i < il; i += 3 ) {

				x = positions[ i ];
				y = positions[ i + 1 ];
				z = positions[ i + 2 ];

				// bounding box

				if ( x < bb.min.x ) {

					bb.min.x = x;

				} else if ( x > bb.max.x ) {

					bb.max.x = x;

				}

				if ( y < bb.min.y ) {

					bb.min.y = y;

				} else if ( y > bb.max.y ) {

					bb.max.y = y;

				}

				if ( z < bb.min.z ) {

					bb.min.z = z;

				} else if ( z > bb.max.z ) {

					bb.max.z = z;

				}

			}

		}

		if ( positions === undefined || positions.length === 0 ) {

			this.boundingBox.min.set( 0, 0, 0 );
			this.boundingBox.max.set( 0, 0, 0 );

		}

	},

	computeBoundingSphere: function () {

		if ( ! this.boundingSphere ) this.boundingSphere = { radius: 0 };

		var positions = this.attributes[ "position" ].array;

		if ( positions ) {

			var radiusSq, maxRadiusSq = 0;
			var x, y, z;

			for ( var i = 0, il = positions.length; i < il; i += 3 ) {

				x = positions[ i ];
				y = positions[ i + 1 ];
				z = positions[ i + 2 ];

				radiusSq =  x * x + y * y + z * z;
				if ( radiusSq > maxRadiusSq ) maxRadiusSq = radiusSq;

			}

			this.boundingSphere.radius = Math.sqrt( maxRadiusSq );

		}

	},

	computeVertexNormals: function () {

		if ( this.attributes[ "position" ] && this.attributes[ "index" ] ) {

			var i, il;
			var j, jl;

			var nVertexElements = this.attributes[ "position" ].array.length;

			if ( this.attributes[ "normal" ] === undefined ) {

				this.attributes[ "normal" ] = {

					itemSize: 3,
					array: new Float32Array( nVertexElements ),
					numItems: nVertexElements

				};

			} else {

				// reset existing normals to zero

				for ( i = 0, il = this.attributes[ "normal" ].array.length; i < il; i ++ ) {

					this.attributes[ "normal" ].array[ i ] = 0;

				}

			}

			var offsets = this.offsets;

			var indices = this.attributes[ "index" ].array;
			var positions = this.attributes[ "position" ].array;
			var normals = this.attributes[ "normal" ].array;

			var vA, vB, vC, x, y, z,

			pA = new THREE.Vector3(),
			pB = new THREE.Vector3(),
			pC = new THREE.Vector3(),

			cb = new THREE.Vector3(),
			ab = new THREE.Vector3();

			for ( j = 0, jl = offsets.length; j < jl; ++ j ) {

				var start = offsets[ j ].start;
				var count = offsets[ j ].count;
				var index = offsets[ j ].index;

				for ( i = start, il = start + count; i < il; i += 3 ) {

					vA = index + indices[ i ];
					vB = index + indices[ i + 1 ];
					vC = index + indices[ i + 2 ];

					x = positions[ vA * 3 ];
					y = positions[ vA * 3 + 1 ];
					z = positions[ vA * 3 + 2 ];
					pA.set( x, y, z );

					x = positions[ vB * 3 ];
					y = positions[ vB * 3 + 1 ];
					z = positions[ vB * 3 + 2 ];
					pB.set( x, y, z );

					x = positions[ vC * 3 ];
					y = positions[ vC * 3 + 1 ];
					z = positions[ vC * 3 + 2 ];
					pC.set( x, y, z );

					cb.sub( pC, pB );
					ab.sub( pA, pB );
					cb.crossSelf( ab );

					normals[ vA * 3 ] 	  += cb.x;
					normals[ vA * 3 + 1 ] += cb.y;
					normals[ vA * 3 + 2 ] += cb.z;

					normals[ vB * 3 ] 	  += cb.x;
					normals[ vB * 3 + 1 ] += cb.y;
					normals[ vB * 3 + 2 ] += cb.z;

					normals[ vC * 3 ] 	  += cb.x;
					normals[ vC * 3 + 1 ] += cb.y;
					normals[ vC * 3 + 2 ] += cb.z;

				}

			}

			this.normalizeNormals();

			this.normalsNeedUpdate = true;

		}

	},

	normalizeNormals: function () {

		var normals = this.attributes[ "normal" ].array;

		var x, y, z, n;

		for ( var i = 0, il = normals.length; i < il; i += 3 ) {

			x = normals[ i ];
			y = normals[ i + 1 ];
			z = normals[ i + 2 ];

			n = 1.0 / Math.sqrt( x * x + y * y + z * z );

			normals[ i ] 	 *= n;
			normals[ i + 1 ] *= n;
			normals[ i + 2 ] *= n;

		}

	},

	computeTangents: function () {

		// based on http://www.terathon.com/code/tangent.html
		// (per vertex tangents)

		if ( this.attributes[ "index" ] === undefined ||
			 this.attributes[ "position" ] === undefined ||
			 this.attributes[ "normal" ] === undefined ||
			 this.attributes[ "uv" ] === undefined ) {

			console.warn( "Missing required attributes (index, position, normal or uv) in BufferGeometry.computeTangents()" );
			return;

		}

		var indices = this.attributes[ "index" ].array;
		var positions = this.attributes[ "position" ].array;
		var normals = this.attributes[ "normal" ].array;
		var uvs = this.attributes[ "uv" ].array;

		var nVertices = positions.length / 3;

		if ( this.attributes[ "tangent" ] === undefined ) {

			var nTangentElements = 4 * nVertices;

			this.attributes[ "tangent" ] = {

				itemSize: 4,
				array: new Float32Array( nTangentElements ),
				numItems: nTangentElements

			};

		}

		var tangents = this.attributes[ "tangent" ].array;

		var tan1 = [], tan2 = [];

		for ( var k = 0; k < nVertices; k ++ ) {

			tan1[ k ] = new THREE.Vector3();
			tan2[ k ] = new THREE.Vector3();

		}

		var xA, yA, zA,
			xB, yB, zB,
			xC, yC, zC,

			uA, vA,
			uB, vB,
			uC, vC,

			x1, x2, y1, y2, z1, z2,
			s1, s2, t1, t2, r;

		var sdir = new THREE.Vector3(), tdir = new THREE.Vector3();

		function handleTriangle( a, b, c ) {

			xA = positions[ a * 3 ];
			yA = positions[ a * 3 + 1 ];
			zA = positions[ a * 3 + 2 ];

			xB = positions[ b * 3 ];
			yB = positions[ b * 3 + 1 ];
			zB = positions[ b * 3 + 2 ];

			xC = positions[ c * 3 ];
			yC = positions[ c * 3 + 1 ];
			zC = positions[ c * 3 + 2 ];

			uA = uvs[ a * 2 ];
			vA = uvs[ a * 2 + 1 ];

			uB = uvs[ b * 2 ];
			vB = uvs[ b * 2 + 1 ];

			uC = uvs[ c * 2 ];
			vC = uvs[ c * 2 + 1 ];

			x1 = xB - xA;
			x2 = xC - xA;

			y1 = yB - yA;
			y2 = yC - yA;

			z1 = zB - zA;
			z2 = zC - zA;

			s1 = uB - uA;
			s2 = uC - uA;

			t1 = vB - vA;
			t2 = vC - vA;

			r = 1.0 / ( s1 * t2 - s2 * t1 );

			sdir.set(
				( t2 * x1 - t1 * x2 ) * r,
				( t2 * y1 - t1 * y2 ) * r,
				( t2 * z1 - t1 * z2 ) * r
			);

			tdir.set(
				( s1 * x2 - s2 * x1 ) * r,
				( s1 * y2 - s2 * y1 ) * r,
				( s1 * z2 - s2 * z1 ) * r
			);

			tan1[ a ].addSelf( sdir );
			tan1[ b ].addSelf( sdir );
			tan1[ c ].addSelf( sdir );

			tan2[ a ].addSelf( tdir );
			tan2[ b ].addSelf( tdir );
			tan2[ c ].addSelf( tdir );

		}

		var i, il;
		var j, jl;
		var iA, iB, iC;

		var offsets = this.offsets;

		for ( j = 0, jl = offsets.length; j < jl; ++ j ) {

			var start = offsets[ j ].start;
			var count = offsets[ j ].count;
			var index = offsets[ j ].index;

			for ( i = start, il = start + count; i < il; i += 3 ) {

				iA = index + indices[ i ];
				iB = index + indices[ i + 1 ];
				iC = index + indices[ i + 2 ];

				handleTriangle( iA, iB, iC );

			}

		}

		var tmp = new THREE.Vector3(), tmp2 = new THREE.Vector3();
		var n = new THREE.Vector3(), n2 = new THREE.Vector3();
		var w, t, test;
		var nx, ny, nz;

		function handleVertex( v ) {

			n.x = normals[ v * 3 ];
			n.y = normals[ v * 3 + 1 ];
			n.z = normals[ v * 3 + 2 ];

			n2.copy( n );

			t = tan1[ v ];

			// Gram-Schmidt orthogonalize

			tmp.copy( t );
			tmp.subSelf( n.multiplyScalar( n.dot( t ) ) ).normalize();

			// Calculate handedness

			tmp2.cross( n2, t );
			test = tmp2.dot( tan2[ v ] );
			w = ( test < 0.0 ) ? -1.0 : 1.0;

			tangents[ v * 4 ] 	  = tmp.x;
			tangents[ v * 4 + 1 ] = tmp.y;
			tangents[ v * 4 + 2 ] = tmp.z;
			tangents[ v * 4 + 3 ] = w;

		}

		for ( j = 0, jl = offsets.length; j < jl; ++ j ) {

			var start = offsets[ j ].start;
			var count = offsets[ j ].count;
			var index = offsets[ j ].index;

			for ( i = start, il = start + count; i < il; i += 3 ) {

				iA = index + indices[ i ];
				iB = index + indices[ i + 1 ];
				iC = index + indices[ i + 2 ];

				handleVertex( iA );
				handleVertex( iB );
				handleVertex( iC );

			}

		}

		this.hasTangents = true;
		this.tangentsNeedUpdate = true;

	},

	deallocate: function () {

		var index = THREE.GeometryLibrary.indexOf( this );
		if ( index !== -1 ) THREE.GeometryLibrary.splice( index, 1 );

	}

};

/**
 * Spline from Tween.js, slightly optimized (and trashed)
 * http://sole.github.com/tween.js/examples/05_spline.html
 *
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Spline = function ( points ) {

	this.points = points;

	var c = [], v3 = { x: 0, y: 0, z: 0 },
	point, intPoint, weight, w2, w3,
	pa, pb, pc, pd;

	this.initFromArray = function( a ) {

		this.points = [];

		for ( var i = 0; i < a.length; i++ ) {

			this.points[ i ] = { x: a[ i ][ 0 ], y: a[ i ][ 1 ], z: a[ i ][ 2 ] };

		}

	};

	this.getPoint = function ( k ) {

		point = ( this.points.length - 1 ) * k;
		intPoint = Math.floor( point );
		weight = point - intPoint;

		c[ 0 ] = intPoint === 0 ? intPoint : intPoint - 1;
		c[ 1 ] = intPoint;
		c[ 2 ] = intPoint  > this.points.length - 2 ? this.points.length - 1 : intPoint + 1;
		c[ 3 ] = intPoint  > this.points.length - 3 ? this.points.length - 1 : intPoint + 2;

		pa = this.points[ c[ 0 ] ];
		pb = this.points[ c[ 1 ] ];
		pc = this.points[ c[ 2 ] ];
		pd = this.points[ c[ 3 ] ];

		w2 = weight * weight;
		w3 = weight * w2;

		v3.x = interpolate( pa.x, pb.x, pc.x, pd.x, weight, w2, w3 );
		v3.y = interpolate( pa.y, pb.y, pc.y, pd.y, weight, w2, w3 );
		v3.z = interpolate( pa.z, pb.z, pc.z, pd.z, weight, w2, w3 );

		return v3;

	};

	this.getControlPointsArray = function () {

		var i, p, l = this.points.length,
			coords = [];

		for ( i = 0; i < l; i ++ ) {

			p = this.points[ i ];
			coords[ i ] = [ p.x, p.y, p.z ];

		}

		return coords;

	};

	// approximate length by summing linear segments

	this.getLength = function ( nSubDivisions ) {

		var i, index, nSamples, position,
			point = 0, intPoint = 0, oldIntPoint = 0,
			oldPosition = new THREE.Vector3(),
			tmpVec = new THREE.Vector3(),
			chunkLengths = [],
			totalLength = 0;

		// first point has 0 length

		chunkLengths[ 0 ] = 0;

		if ( !nSubDivisions ) nSubDivisions = 100;

		nSamples = this.points.length * nSubDivisions;

		oldPosition.copy( this.points[ 0 ] );

		for ( i = 1; i < nSamples; i ++ ) {

			index = i / nSamples;

			position = this.getPoint( index );
			tmpVec.copy( position );

			totalLength += tmpVec.distanceTo( oldPosition );

			oldPosition.copy( position );

			point = ( this.points.length - 1 ) * index;
			intPoint = Math.floor( point );

			if ( intPoint != oldIntPoint ) {

				chunkLengths[ intPoint ] = totalLength;
				oldIntPoint = intPoint;

			}

		}

		// last point ends with total length

		chunkLengths[ chunkLengths.length ] = totalLength;

		return { chunks: chunkLengths, total: totalLength };

	};

	this.reparametrizeByArcLength = function ( samplingCoef ) {

		var i, j,
			index, indexCurrent, indexNext,
			linearDistance, realDistance,
			sampling, position,
			newpoints = [],
			tmpVec = new THREE.Vector3(),
			sl = this.getLength();

		newpoints.push( tmpVec.copy( this.points[ 0 ] ).clone() );

		for ( i = 1; i < this.points.length; i++ ) {

			//tmpVec.copy( this.points[ i - 1 ] );
			//linearDistance = tmpVec.distanceTo( this.points[ i ] );

			realDistance = sl.chunks[ i ] - sl.chunks[ i - 1 ];

			sampling = Math.ceil( samplingCoef * realDistance / sl.total );

			indexCurrent = ( i - 1 ) / ( this.points.length - 1 );
			indexNext = i / ( this.points.length - 1 );

			for ( j = 1; j < sampling - 1; j++ ) {

				index = indexCurrent + j * ( 1 / sampling ) * ( indexNext - indexCurrent );

				position = this.getPoint( index );
				newpoints.push( tmpVec.copy( position ).clone() );

			}

			newpoints.push( tmpVec.copy( this.points[ i ] ).clone() );

		}

		this.points = newpoints;

	};

	// Catmull-Rom

	function interpolate( p0, p1, p2, p3, t, t2, t3 ) {

		var v0 = ( p2 - p0 ) * 0.5,
			v1 = ( p3 - p1 ) * 0.5;

		return ( 2 * ( p1 - p2 ) + v0 + v1 ) * t3 + ( - 3 * ( p1 - p2 ) - 2 * v0 - v1 ) * t2 + v0 * t + p1;

	};

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author mikael emtinger / http://gomo.se/
 */

THREE.Camera = function () {

	THREE.Object3D.call( this );

	this.matrixWorldInverse = new THREE.Matrix4();

	this.projectionMatrix = new THREE.Matrix4();
	this.projectionMatrixInverse = new THREE.Matrix4();

};

THREE.Camera.prototype = Object.create( THREE.Object3D.prototype );

THREE.Camera.prototype.lookAt = function ( vector ) {

	// TODO: Add hierarchy support.

	this.matrix.lookAt( this.position, vector, this.up );

	if ( this.rotationAutoUpdate === true ) {

		if ( this.useQuaternion === false )  {

			this.rotation.setEulerFromRotationMatrix( this.matrix, this.eulerOrder );

		} else {

			this.quaternion.copy( this.matrix.decompose()[ 1 ] );

		}

	}

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.OrthographicCamera = function ( left, right, top, bottom, near, far ) {

	THREE.Camera.call( this );

	this.left = left;
	this.right = right;
	this.top = top;
	this.bottom = bottom;

	this.near = ( near !== undefined ) ? near : 0.1;
	this.far = ( far !== undefined ) ? far : 2000;

	this.updateProjectionMatrix();

};

THREE.OrthographicCamera.prototype = Object.create( THREE.Camera.prototype );

THREE.OrthographicCamera.prototype.updateProjectionMatrix = function () {

	this.projectionMatrix.makeOrthographic( this.left, this.right, this.top, this.bottom, this.near, this.far );

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author greggman / http://games.greggman.com/
 * @author zz85 / http://www.lab4games.net/zz85/blog
 */

THREE.PerspectiveCamera = function ( fov, aspect, near, far ) {

	THREE.Camera.call( this );

	this.fov = fov !== undefined ? fov : 50;
	this.aspect = aspect !== undefined ? aspect : 1;
	this.near = near !== undefined ? near : 0.1;
	this.far = far !== undefined ? far : 2000;

	this.updateProjectionMatrix();

};

THREE.PerspectiveCamera.prototype = Object.create( THREE.Camera.prototype );


/**
 * Uses Focal Length (in mm) to estimate and set FOV
 * 35mm (fullframe) camera is used if frame size is not specified;
 * Formula based on http://www.bobatkins.com/photography/technical/field_of_view.html
 */

THREE.PerspectiveCamera.prototype.setLens = function ( focalLength, frameHeight ) {

	if ( frameHeight === undefined ) frameHeight = 24;

	this.fov = 2 * Math.atan( frameHeight / ( focalLength * 2 ) ) * ( 180 / Math.PI );
	this.updateProjectionMatrix();

}


/**
 * Sets an offset in a larger frustum. This is useful for multi-window or
 * multi-monitor/multi-machine setups.
 *
 * For example, if you have 3x2 monitors and each monitor is 1920x1080 and
 * the monitors are in grid like this
 *
 *   +---+---+---+
 *   | A | B | C |
 *   +---+---+---+
 *   | D | E | F |
 *   +---+---+---+
 *
 * then for each monitor you would call it like this
 *
 *   var w = 1920;
 *   var h = 1080;
 *   var fullWidth = w * 3;
 *   var fullHeight = h * 2;
 *
 *   --A--
 *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
 *   --B--
 *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
 *   --C--
 *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
 *   --D--
 *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
 *   --E--
 *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
 *   --F--
 *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
 *
 *   Note there is no reason monitors have to be the same size or in a grid.
 */

THREE.PerspectiveCamera.prototype.setViewOffset = function ( fullWidth, fullHeight, x, y, width, height ) {

	this.fullWidth = fullWidth;
	this.fullHeight = fullHeight;
	this.x = x;
	this.y = y;
	this.width = width;
	this.height = height;

	this.updateProjectionMatrix();

};


THREE.PerspectiveCamera.prototype.updateProjectionMatrix = function () {

	if ( this.fullWidth ) {

		var aspect = this.fullWidth / this.fullHeight;
		var top = Math.tan( this.fov * Math.PI / 360 ) * this.near;
		var bottom = -top;
		var left = aspect * bottom;
		var right = aspect * top;
		var width = Math.abs( right - left );
		var height = Math.abs( top - bottom );

		this.projectionMatrix.makeFrustum(
			left + this.x * width / this.fullWidth,
			left + ( this.x + this.width ) * width / this.fullWidth,
			top - ( this.y + this.height ) * height / this.fullHeight,
			top - this.y * height / this.fullHeight,
			this.near,
			this.far
		);

	} else {

		this.projectionMatrix.makePerspective( this.fov, this.aspect, this.near, this.far );

	}

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Light = function ( hex ) {

	THREE.Object3D.call( this );

	this.color = new THREE.Color( hex );

};

THREE.Light.prototype = Object.create( THREE.Object3D.prototype );
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.AmbientLight = function ( hex ) {

	THREE.Light.call( this, hex );

};

THREE.AmbientLight.prototype = Object.create( THREE.Light.prototype );
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.DirectionalLight = function ( hex, intensity ) {

	THREE.Light.call( this, hex );

	this.position = new THREE.Vector3( 0, 1, 0 );
	this.target = new THREE.Object3D();

	this.intensity = ( intensity !== undefined ) ? intensity : 1;

	this.castShadow = false;
	this.onlyShadow = false;

	//

	this.shadowCameraNear = 50;
	this.shadowCameraFar = 5000;

	this.shadowCameraLeft = -500;
	this.shadowCameraRight = 500;
	this.shadowCameraTop = 500;
	this.shadowCameraBottom = -500;

	this.shadowCameraVisible = false;

	this.shadowBias = 0;
	this.shadowDarkness = 0.5;

	this.shadowMapWidth = 512;
	this.shadowMapHeight = 512;

	//

	this.shadowCascade = false;

	this.shadowCascadeOffset = new THREE.Vector3( 0, 0, -1000 );
	this.shadowCascadeCount = 2;

	this.shadowCascadeBias = [ 0, 0, 0 ];
	this.shadowCascadeWidth = [ 512, 512, 512 ];
	this.shadowCascadeHeight = [ 512, 512, 512 ];

	this.shadowCascadeNearZ = [ -1.000, 0.990, 0.998 ];
	this.shadowCascadeFarZ  = [  0.990, 0.998, 1.000 ];

	this.shadowCascadeArray = [];

	//

	this.shadowMap = null;
	this.shadowMapSize = null;
	this.shadowCamera = null;
	this.shadowMatrix = null;

};

THREE.DirectionalLight.prototype = Object.create( THREE.Light.prototype );
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.HemisphereLight = function ( skyColorHex, groundColorHex, intensity ) {

	THREE.Light.call( this, skyColorHex );

	this.groundColor = new THREE.Color( groundColorHex );

	this.position = new THREE.Vector3( 0, 100, 0 );

	this.intensity = ( intensity !== undefined ) ? intensity : 1;

};

THREE.HemisphereLight.prototype = Object.create( THREE.Light.prototype );
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.PointLight = function ( hex, intensity, distance ) {

	THREE.Light.call( this, hex );

	this.position = new THREE.Vector3( 0, 0, 0 );
	this.intensity = ( intensity !== undefined ) ? intensity : 1;
	this.distance = ( distance !== undefined ) ? distance : 0;

};

THREE.PointLight.prototype = Object.create( THREE.Light.prototype );
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.SpotLight = function ( hex, intensity, distance, angle, exponent ) {

	THREE.Light.call( this, hex );

	this.position = new THREE.Vector3( 0, 1, 0 );
	this.target = new THREE.Object3D();

	this.intensity = ( intensity !== undefined ) ? intensity : 1;
	this.distance = ( distance !== undefined ) ? distance : 0;
	this.angle = ( angle !== undefined ) ? angle : Math.PI / 2;
	this.exponent = ( exponent !== undefined ) ? exponent : 10;

	this.castShadow = false;
	this.onlyShadow = false;

	//

	this.shadowCameraNear = 50;
	this.shadowCameraFar = 5000;
	this.shadowCameraFov = 50;

	this.shadowCameraVisible = false;

	this.shadowBias = 0;
	this.shadowDarkness = 0.5;

	this.shadowMapWidth = 512;
	this.shadowMapHeight = 512;

	//

	this.shadowMap = null;
	this.shadowMapSize = null;
	this.shadowCamera = null;
	this.shadowMatrix = null;

};

THREE.SpotLight.prototype = Object.create( THREE.Light.prototype );
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Loader = function ( showStatus ) {

	this.showStatus = showStatus;
	this.statusDomElement = showStatus ? THREE.Loader.prototype.addStatusElement() : null;

	this.onLoadStart = function () {};
	this.onLoadProgress = function () {};
	this.onLoadComplete = function () {};

};

THREE.Loader.prototype = {

	constructor: THREE.Loader,

	crossOrigin: 'anonymous',

	addStatusElement: function () {

		var e = document.createElement( "div" );

		e.style.position = "absolute";
		e.style.right = "0px";
		e.style.top = "0px";
		e.style.fontSize = "0.8em";
		e.style.textAlign = "left";
		e.style.background = "rgba(0,0,0,0.25)";
		e.style.color = "#fff";
		e.style.width = "120px";
		e.style.padding = "0.5em 0.5em 0.5em 0.5em";
		e.style.zIndex = 1000;

		e.innerHTML = "Loading ...";

		return e;

	},

	updateProgress: function ( progress ) {

		var message = "Loaded ";

		if ( progress.total ) {

			message += ( 100 * progress.loaded / progress.total ).toFixed(0) + "%";


		} else {

			message += ( progress.loaded / 1000 ).toFixed(2) + " KB";

		}

		this.statusDomElement.innerHTML = message;

	},

	extractUrlBase: function ( url ) {

		var parts = url.split( '/' );
		parts.pop();
		return ( parts.length < 1 ? '.' : parts.join( '/' ) ) + '/';

	},

	initMaterials: function ( materials, texturePath ) {

		var array = [];

		for ( var i = 0; i < materials.length; ++ i ) {

			array[ i ] = THREE.Loader.prototype.createMaterial( materials[ i ], texturePath );

		}

		return array;

	},

	needsTangents: function ( materials ) {

		for( var i = 0, il = materials.length; i < il; i ++ ) {

			var m = materials[ i ];

			if ( m instanceof THREE.ShaderMaterial ) return true;

		}

		return false;

	},

	createMaterial: function ( m, texturePath ) {

		var _this = this;

		function is_pow2( n ) {

			var l = Math.log( n ) / Math.LN2;
			return Math.floor( l ) == l;

		}

		function nearest_pow2( n ) {

			var l = Math.log( n ) / Math.LN2;
			return Math.pow( 2, Math.round(  l ) );

		}

		function load_image( where, url ) {

			var image = new Image();

			image.onload = function () {

				if ( !is_pow2( this.width ) || !is_pow2( this.height ) ) {

					var width = nearest_pow2( this.width );
					var height = nearest_pow2( this.height );

					where.image.width = width;
					where.image.height = height;
					where.image.getContext( '2d' ).drawImage( this, 0, 0, width, height );

				} else {

					where.image = this;

				}

				where.needsUpdate = true;

			};

			image.crossOrigin = _this.crossOrigin;
			image.src = url;

		}

		function create_texture( where, name, sourceFile, repeat, offset, wrap, anisotropy ) {

			var isCompressed = sourceFile.toLowerCase().endsWith( ".dds" );
			var fullPath = texturePath + "/" + sourceFile;

			if ( isCompressed ) {

				var texture = THREE.ImageUtils.loadCompressedTexture( fullPath );

				where[ name ] = texture;

			} else {

				var texture = document.createElement( 'canvas' );

				where[ name ] = new THREE.Texture( texture );

			}

			where[ name ].sourceFile = sourceFile;

			if( repeat ) {

				where[ name ].repeat.set( repeat[ 0 ], repeat[ 1 ] );

				if ( repeat[ 0 ] !== 1 ) where[ name ].wrapS = THREE.RepeatWrapping;
				if ( repeat[ 1 ] !== 1 ) where[ name ].wrapT = THREE.RepeatWrapping;

			}

			if ( offset ) {

				where[ name ].offset.set( offset[ 0 ], offset[ 1 ] );

			}

			if ( wrap ) {

				var wrapMap = {
					"repeat": THREE.RepeatWrapping,
					"mirror": THREE.MirroredRepeatWrapping
				}

				if ( wrapMap[ wrap[ 0 ] ] !== undefined ) where[ name ].wrapS = wrapMap[ wrap[ 0 ] ];
				if ( wrapMap[ wrap[ 1 ] ] !== undefined ) where[ name ].wrapT = wrapMap[ wrap[ 1 ] ];

			}

			if ( anisotropy ) {

				where[ name ].anisotropy = anisotropy;

			}

			if ( ! isCompressed ) {

				load_image( where[ name ], fullPath );

			}

		}

		function rgb2hex( rgb ) {

			return ( rgb[ 0 ] * 255 << 16 ) + ( rgb[ 1 ] * 255 << 8 ) + rgb[ 2 ] * 255;

		}

		// defaults

		var mtype = "MeshLambertMaterial";
		var mpars = { color: 0xeeeeee, opacity: 1.0, map: null, lightMap: null, normalMap: null, bumpMap: null, wireframe: false };

		// parameters from model file

		if ( m.shading ) {

			var shading = m.shading.toLowerCase();

			if ( shading === "phong" ) mtype = "MeshPhongMaterial";
			else if ( shading === "basic" ) mtype = "MeshBasicMaterial";

		}

		if ( m.blending !== undefined && THREE[ m.blending ] !== undefined ) {

			mpars.blending = THREE[ m.blending ];

		}

		if ( m.transparent !== undefined || m.opacity < 1.0 ) {

			mpars.transparent = m.transparent;

		}

		if ( m.depthTest !== undefined ) {

			mpars.depthTest = m.depthTest;

		}

		if ( m.depthWrite !== undefined ) {

			mpars.depthWrite = m.depthWrite;

		}

		if ( m.visible !== undefined ) {

			mpars.visible = m.visible;

		}

		if ( m.flipSided !== undefined ) {

			mpars.side = THREE.BackSide;

		}

		if ( m.doubleSided !== undefined ) {

			mpars.side = THREE.DoubleSide;

		}

		if ( m.wireframe !== undefined ) {

			mpars.wireframe = m.wireframe;

		}

		if ( m.vertexColors !== undefined ) {

			if ( m.vertexColors === "face" ) {

				mpars.vertexColors = THREE.FaceColors;

			} else if ( m.vertexColors ) {

				mpars.vertexColors = THREE.VertexColors;

			}

		}

		// colors

		if ( m.colorDiffuse ) {

			mpars.color = rgb2hex( m.colorDiffuse );

		} else if ( m.DbgColor ) {

			mpars.color = m.DbgColor;

		}

		if ( m.colorSpecular ) {

			mpars.specular = rgb2hex( m.colorSpecular );

		}

		if ( m.colorAmbient ) {

			mpars.ambient = rgb2hex( m.colorAmbient );

		}

		// modifiers

		if ( m.transparency ) {

			mpars.opacity = m.transparency;

		}

		if ( m.specularCoef ) {

			mpars.shininess = m.specularCoef;

		}

		// textures

		if ( m.mapDiffuse && texturePath ) {

			create_texture( mpars, "map", m.mapDiffuse, m.mapDiffuseRepeat, m.mapDiffuseOffset, m.mapDiffuseWrap, m.mapDiffuseAnisotropy );

		}

		if ( m.mapLight && texturePath ) {

			create_texture( mpars, "lightMap", m.mapLight, m.mapLightRepeat, m.mapLightOffset, m.mapLightWrap, m.mapLightAnisotropy );

		}

		if ( m.mapBump && texturePath ) {

			create_texture( mpars, "bumpMap", m.mapBump, m.mapBumpRepeat, m.mapBumpOffset, m.mapBumpWrap, m.mapBumpAnisotropy );

		}

		if ( m.mapNormal && texturePath ) {

			create_texture( mpars, "normalMap", m.mapNormal, m.mapNormalRepeat, m.mapNormalOffset, m.mapNormalWrap, m.mapNormalAnisotropy );

		}

		if ( m.mapSpecular && texturePath ) {

			create_texture( mpars, "specularMap", m.mapSpecular, m.mapSpecularRepeat, m.mapSpecularOffset, m.mapSpecularWrap, m.mapSpecularAnisotropy );

		}

		//

		if ( m.mapBumpScale ) {

			mpars.bumpScale = m.mapBumpScale;

		}

		// special case for normal mapped material

		if ( m.mapNormal ) {

			var shader = THREE.ShaderUtils.lib[ "normal" ];
			var uniforms = THREE.UniformsUtils.clone( shader.uniforms );

			uniforms[ "tNormal" ].value = mpars.normalMap;

			if ( m.mapNormalFactor ) {

				uniforms[ "uNormalScale" ].value.set( m.mapNormalFactor, m.mapNormalFactor );

			}

			if ( mpars.map ) {

				uniforms[ "tDiffuse" ].value = mpars.map;
				uniforms[ "enableDiffuse" ].value = true;

			}

			if ( mpars.specularMap ) {

				uniforms[ "tSpecular" ].value = mpars.specularMap;
				uniforms[ "enableSpecular" ].value = true;

			}

			if ( mpars.lightMap ) {

				uniforms[ "tAO" ].value = mpars.lightMap;
				uniforms[ "enableAO" ].value = true;

			}

			// for the moment don't handle displacement texture

			uniforms[ "uDiffuseColor" ].value.setHex( mpars.color );
			uniforms[ "uSpecularColor" ].value.setHex( mpars.specular );
			uniforms[ "uAmbientColor" ].value.setHex( mpars.ambient );

			uniforms[ "uShininess" ].value = mpars.shininess;

			if ( mpars.opacity !== undefined ) {

				uniforms[ "uOpacity" ].value = mpars.opacity;

			}

			var parameters = { fragmentShader: shader.fragmentShader, vertexShader: shader.vertexShader, uniforms: uniforms, lights: true, fog: true };
			var material = new THREE.ShaderMaterial( parameters );

		} else {

			var material = new THREE[ mtype ]( mpars );

		}

		if ( m.DbgName !== undefined ) material.name = m.DbgName;

		return material;

	}

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.BinaryLoader = function ( showStatus ) {

	THREE.Loader.call( this, showStatus );

};

THREE.BinaryLoader.prototype = Object.create( THREE.Loader.prototype );

// Load models generated by slim OBJ converter with BINARY option (converter_obj_three_slim.py -t binary)
//  - binary models consist of two files: JS and BIN
//  - parameters
//		- url (required)
//		- callback (required)
//		- texturePath (optional: if not specified, textures will be assumed to be in the same folder as JS model file)
//		- binaryPath (optional: if not specified, binary file will be assumed to be in the same folder as JS model file)

THREE.BinaryLoader.prototype.load = function( url, callback, texturePath, binaryPath ) {

	// todo: unify load API to for easier SceneLoader use

	texturePath = texturePath && ( typeof texturePath === "string" ) ? texturePath : this.extractUrlBase( url );
	binaryPath = binaryPath && ( typeof binaryPath === "string" ) ? binaryPath : this.extractUrlBase( url );

	var callbackProgress = this.showProgress ? THREE.Loader.prototype.updateProgress : null;

	this.onLoadStart();

	// #1 load JS part via web worker

	this.loadAjaxJSON( this, url, callback, texturePath, binaryPath, callbackProgress );

};

THREE.BinaryLoader.prototype.loadAjaxJSON = function ( context, url, callback, texturePath, binaryPath, callbackProgress ) {

	var xhr = new XMLHttpRequest();

	xhr.onreadystatechange = function () {

		if ( xhr.readyState == 4 ) {

			if ( xhr.status == 200 || xhr.status == 0 ) {

				var json = JSON.parse( xhr.responseText );
				context.loadAjaxBuffers( json, callback, binaryPath, texturePath, callbackProgress );

			} else {

				console.error( "THREE.BinaryLoader: Couldn't load [" + url + "] [" + xhr.status + "]" );

			}

		}

	};

	xhr.open( "GET", url, true );
	xhr.send( null );

};

THREE.BinaryLoader.prototype.loadAjaxBuffers = function ( json, callback, binaryPath, texturePath, callbackProgress ) {

	var xhr = new XMLHttpRequest(),
		url = binaryPath + "/" + json.buffers;

	var length = 0;

	xhr.onreadystatechange = function () {

		if ( xhr.readyState == 4 ) {

			if ( xhr.status == 200 || xhr.status == 0 ) {

				var buffer = xhr.response;
				if ( buffer === undefined ) buffer = ( new Uint8Array( xhr.responseBody ) ).buffer; // IEWEBGL needs this
				THREE.BinaryLoader.prototype.createBinModel( buffer, callback, texturePath, json.materials );

			} else {

				console.error( "THREE.BinaryLoader: Couldn't load [" + url + "] [" + xhr.status + "]" );

			}

		} else if ( xhr.readyState == 3 ) {

			if ( callbackProgress ) {

				if ( length == 0 ) {

					length = xhr.getResponseHeader( "Content-Length" );

				}

				callbackProgress( { total: length, loaded: xhr.responseText.length } );

			}

		} else if ( xhr.readyState == 2 ) {

			length = xhr.getResponseHeader( "Content-Length" );

		}

	};

	xhr.open( "GET", url, true );
	xhr.responseType = "arraybuffer";
	xhr.send( null );

};

// Binary AJAX parser

THREE.BinaryLoader.prototype.createBinModel = function ( data, callback, texturePath, jsonMaterials ) {

	var Model = function ( texturePath ) {

		var scope = this,
			currentOffset = 0,
			md,
			normals = [],
			uvs = [],
			start_tri_flat, start_tri_smooth, start_tri_flat_uv, start_tri_smooth_uv,
			start_quad_flat, start_quad_smooth, start_quad_flat_uv, start_quad_smooth_uv,
			tri_size, quad_size,
			len_tri_flat, len_tri_smooth, len_tri_flat_uv, len_tri_smooth_uv,
			len_quad_flat, len_quad_smooth, len_quad_flat_uv, len_quad_smooth_uv;


		THREE.Geometry.call( this );

		md = parseMetaData( data, currentOffset );

		currentOffset += md.header_bytes;
/*
		md.vertex_index_bytes = Uint32Array.BYTES_PER_ELEMENT;
		md.material_index_bytes = Uint16Array.BYTES_PER_ELEMENT;
		md.normal_index_bytes = Uint32Array.BYTES_PER_ELEMENT;
		md.uv_index_bytes = Uint32Array.BYTES_PER_ELEMENT;
*/
		// buffers sizes

		tri_size =  md.vertex_index_bytes * 3 + md.material_index_bytes;
		quad_size = md.vertex_index_bytes * 4 + md.material_index_bytes;

		len_tri_flat      = md.ntri_flat      * ( tri_size );
		len_tri_smooth    = md.ntri_smooth    * ( tri_size + md.normal_index_bytes * 3 );
		len_tri_flat_uv   = md.ntri_flat_uv   * ( tri_size + md.uv_index_bytes * 3 );
		len_tri_smooth_uv = md.ntri_smooth_uv * ( tri_size + md.normal_index_bytes * 3 + md.uv_index_bytes * 3 );

		len_quad_flat      = md.nquad_flat      * ( quad_size );
		len_quad_smooth    = md.nquad_smooth    * ( quad_size + md.normal_index_bytes * 4 );
		len_quad_flat_uv   = md.nquad_flat_uv   * ( quad_size + md.uv_index_bytes * 4 );
		len_quad_smooth_uv = md.nquad_smooth_uv * ( quad_size + md.normal_index_bytes * 4 + md.uv_index_bytes * 4 );

		// read buffers

		currentOffset += init_vertices( currentOffset );

		currentOffset += init_normals( currentOffset );
		currentOffset += handlePadding( md.nnormals * 3 );

		currentOffset += init_uvs( currentOffset );

		start_tri_flat 		= currentOffset;
		start_tri_smooth    = start_tri_flat    + len_tri_flat    + handlePadding( md.ntri_flat * 2 );
		start_tri_flat_uv   = start_tri_smooth  + len_tri_smooth  + handlePadding( md.ntri_smooth * 2 );
		start_tri_smooth_uv = start_tri_flat_uv + len_tri_flat_uv + handlePadding( md.ntri_flat_uv * 2 );

		start_quad_flat     = start_tri_smooth_uv + len_tri_smooth_uv  + handlePadding( md.ntri_smooth_uv * 2 );
		start_quad_smooth   = start_quad_flat     + len_quad_flat	   + handlePadding( md.nquad_flat * 2 );
		start_quad_flat_uv  = start_quad_smooth   + len_quad_smooth    + handlePadding( md.nquad_smooth * 2 );
		start_quad_smooth_uv= start_quad_flat_uv  + len_quad_flat_uv   + handlePadding( md.nquad_flat_uv * 2 );

		// have to first process faces with uvs
		// so that face and uv indices match

		init_triangles_flat_uv( start_tri_flat_uv );
		init_triangles_smooth_uv( start_tri_smooth_uv );

		init_quads_flat_uv( start_quad_flat_uv );
		init_quads_smooth_uv( start_quad_smooth_uv );

		// now we can process untextured faces

		init_triangles_flat( start_tri_flat );
		init_triangles_smooth( start_tri_smooth );

		init_quads_flat( start_quad_flat );
		init_quads_smooth( start_quad_smooth );

		this.computeCentroids();
		this.computeFaceNormals();

		function handlePadding( n ) {

			return ( n % 4 ) ? ( 4 - n % 4 ) : 0;

		};

		function parseMetaData( data, offset ) {

			var metaData = {

				'signature'               :parseString( data, offset,  12 ),
				'header_bytes'            :parseUChar8( data, offset + 12 ),

				'vertex_coordinate_bytes' :parseUChar8( data, offset + 13 ),
				'normal_coordinate_bytes' :parseUChar8( data, offset + 14 ),
				'uv_coordinate_bytes'     :parseUChar8( data, offset + 15 ),

				'vertex_index_bytes'      :parseUChar8( data, offset + 16 ),
				'normal_index_bytes'      :parseUChar8( data, offset + 17 ),
				'uv_index_bytes'          :parseUChar8( data, offset + 18 ),
				'material_index_bytes'    :parseUChar8( data, offset + 19 ),

				'nvertices'    :parseUInt32( data, offset + 20 ),
				'nnormals'     :parseUInt32( data, offset + 20 + 4*1 ),
				'nuvs'         :parseUInt32( data, offset + 20 + 4*2 ),

				'ntri_flat'      :parseUInt32( data, offset + 20 + 4*3 ),
				'ntri_smooth'    :parseUInt32( data, offset + 20 + 4*4 ),
				'ntri_flat_uv'   :parseUInt32( data, offset + 20 + 4*5 ),
				'ntri_smooth_uv' :parseUInt32( data, offset + 20 + 4*6 ),

				'nquad_flat'      :parseUInt32( data, offset + 20 + 4*7 ),
				'nquad_smooth'    :parseUInt32( data, offset + 20 + 4*8 ),
				'nquad_flat_uv'   :parseUInt32( data, offset + 20 + 4*9 ),
				'nquad_smooth_uv' :parseUInt32( data, offset + 20 + 4*10 )

			};
/*
			console.log( "signature: " + metaData.signature );

			console.log( "header_bytes: " + metaData.header_bytes );
			console.log( "vertex_coordinate_bytes: " + metaData.vertex_coordinate_bytes );
			console.log( "normal_coordinate_bytes: " + metaData.normal_coordinate_bytes );
			console.log( "uv_coordinate_bytes: " + metaData.uv_coordinate_bytes );

			console.log( "vertex_index_bytes: " + metaData.vertex_index_bytes );
			console.log( "normal_index_bytes: " + metaData.normal_index_bytes );
			console.log( "uv_index_bytes: " + metaData.uv_index_bytes );
			console.log( "material_index_bytes: " + metaData.material_index_bytes );

			console.log( "nvertices: " + metaData.nvertices );
			console.log( "nnormals: " + metaData.nnormals );
			console.log( "nuvs: " + metaData.nuvs );

			console.log( "ntri_flat: " + metaData.ntri_flat );
			console.log( "ntri_smooth: " + metaData.ntri_smooth );
			console.log( "ntri_flat_uv: " + metaData.ntri_flat_uv );
			console.log( "ntri_smooth_uv: " + metaData.ntri_smooth_uv );

			console.log( "nquad_flat: " + metaData.nquad_flat );
			console.log( "nquad_smooth: " + metaData.nquad_smooth );
			console.log( "nquad_flat_uv: " + metaData.nquad_flat_uv );
			console.log( "nquad_smooth_uv: " + metaData.nquad_smooth_uv );

			var total = metaData.header_bytes
					  + metaData.nvertices * metaData.vertex_coordinate_bytes * 3
					  + metaData.nnormals * metaData.normal_coordinate_bytes * 3
					  + metaData.nuvs * metaData.uv_coordinate_bytes * 2
					  + metaData.ntri_flat * ( metaData.vertex_index_bytes*3 + metaData.material_index_bytes )
					  + metaData.ntri_smooth * ( metaData.vertex_index_bytes*3 + metaData.material_index_bytes + metaData.normal_index_bytes*3 )
					  + metaData.ntri_flat_uv * ( metaData.vertex_index_bytes*3 + metaData.material_index_bytes + metaData.uv_index_bytes*3 )
					  + metaData.ntri_smooth_uv * ( metaData.vertex_index_bytes*3 + metaData.material_index_bytes + metaData.normal_index_bytes*3 + metaData.uv_index_bytes*3 )
					  + metaData.nquad_flat * ( metaData.vertex_index_bytes*4 + metaData.material_index_bytes )
					  + metaData.nquad_smooth * ( metaData.vertex_index_bytes*4 + metaData.material_index_bytes + metaData.normal_index_bytes*4 )
					  + metaData.nquad_flat_uv * ( metaData.vertex_index_bytes*4 + metaData.material_index_bytes + metaData.uv_index_bytes*4 )
					  + metaData.nquad_smooth_uv * ( metaData.vertex_index_bytes*4 + metaData.material_index_bytes + metaData.normal_index_bytes*4 + metaData.uv_index_bytes*4 );
			console.log( "total bytes: " + total );
*/

			return metaData;

		};

		function parseString( data, offset, length ) {

			var charArray = new Uint8Array( data, offset, length );

			var text = "";

			for ( var i = 0; i < length; i ++ ) {

				text += String.fromCharCode( charArray[ offset + i ] );

			}

			return text;

		};

		function parseUChar8( data, offset ) {

			var charArray = new Uint8Array( data, offset, 1 );

			return charArray[ 0 ];

		};

		function parseUInt32( data, offset ) {

			var intArray = new Uint32Array( data, offset, 1 );

			return intArray[ 0 ];

		};

		function init_vertices( start ) {

			var nElements = md.nvertices;

			var coordArray = new Float32Array( data, start, nElements * 3 );

			var i, x, y, z;

			for( i = 0; i < nElements; i ++ ) {

				x = coordArray[ i * 3 ];
				y = coordArray[ i * 3 + 1 ];
				z = coordArray[ i * 3 + 2 ];

				vertex( scope, x, y, z );

			}

			return nElements * 3 * Float32Array.BYTES_PER_ELEMENT;

		};

		function init_normals( start ) {

			var nElements = md.nnormals;

			if ( nElements ) {

				var normalArray = new Int8Array( data, start, nElements * 3 );

				var i, x, y, z;

				for( i = 0; i < nElements; i ++ ) {

					x = normalArray[ i * 3 ];
					y = normalArray[ i * 3 + 1 ];
					z = normalArray[ i * 3 + 2 ];

					normals.push( x/127, y/127, z/127 );

				}

			}

			return nElements * 3 * Int8Array.BYTES_PER_ELEMENT;

		};

		function init_uvs( start ) {

			var nElements = md.nuvs;

			if ( nElements ) {

				var uvArray = new Float32Array( data, start, nElements * 2 );

				var i, u, v;

				for( i = 0; i < nElements; i ++ ) {

					u = uvArray[ i * 2 ];
					v = uvArray[ i * 2 + 1 ];

					uvs.push( u, v );

				}

			}

			return nElements * 2 * Float32Array.BYTES_PER_ELEMENT;

		};

		function init_uvs3( nElements, offset ) {

			var i, uva, uvb, uvc, u1, u2, u3, v1, v2, v3;

			var uvIndexBuffer = new Uint32Array( data, offset, 3 * nElements );

			for( i = 0; i < nElements; i ++ ) {

				uva = uvIndexBuffer[ i * 3 ];
				uvb = uvIndexBuffer[ i * 3 + 1 ];
				uvc = uvIndexBuffer[ i * 3 + 2 ];

				u1 = uvs[ uva*2 ];
				v1 = uvs[ uva*2 + 1 ];

				u2 = uvs[ uvb*2 ];
				v2 = uvs[ uvb*2 + 1 ];

				u3 = uvs[ uvc*2 ];
				v3 = uvs[ uvc*2 + 1 ];

				uv3( scope.faceVertexUvs[ 0 ], u1, v1, u2, v2, u3, v3 );

			}

		};

		function init_uvs4( nElements, offset ) {

			var i, uva, uvb, uvc, uvd, u1, u2, u3, u4, v1, v2, v3, v4;

			var uvIndexBuffer = new Uint32Array( data, offset, 4 * nElements );

			for( i = 0; i < nElements; i ++ ) {

				uva = uvIndexBuffer[ i * 4 ];
				uvb = uvIndexBuffer[ i * 4 + 1 ];
				uvc = uvIndexBuffer[ i * 4 + 2 ];
				uvd = uvIndexBuffer[ i * 4 + 3 ];

				u1 = uvs[ uva*2 ];
				v1 = uvs[ uva*2 + 1 ];

				u2 = uvs[ uvb*2 ];
				v2 = uvs[ uvb*2 + 1 ];

				u3 = uvs[ uvc*2 ];
				v3 = uvs[ uvc*2 + 1 ];

				u4 = uvs[ uvd*2 ];
				v4 = uvs[ uvd*2 + 1 ];

				uv4( scope.faceVertexUvs[ 0 ], u1, v1, u2, v2, u3, v3, u4, v4 );

			}

		};

		function init_faces3_flat( nElements, offsetVertices, offsetMaterials ) {

			var i, a, b, c, m;

			var vertexIndexBuffer = new Uint32Array( data, offsetVertices, 3 * nElements );
			var materialIndexBuffer = new Uint16Array( data, offsetMaterials, nElements );

			for( i = 0; i < nElements; i ++ ) {

				a = vertexIndexBuffer[ i * 3 ];
				b = vertexIndexBuffer[ i * 3 + 1 ];
				c = vertexIndexBuffer[ i * 3 + 2 ];

				m = materialIndexBuffer[ i ];

				f3( scope, a, b, c, m );

			}

		};

		function init_faces4_flat( nElements, offsetVertices, offsetMaterials ) {

			var i, a, b, c, d, m;

			var vertexIndexBuffer = new Uint32Array( data, offsetVertices, 4 * nElements );
			var materialIndexBuffer = new Uint16Array( data, offsetMaterials, nElements );

			for( i = 0; i < nElements; i ++ ) {

				a = vertexIndexBuffer[ i * 4 ];
				b = vertexIndexBuffer[ i * 4 + 1 ];
				c = vertexIndexBuffer[ i * 4 + 2 ];
				d = vertexIndexBuffer[ i * 4 + 3 ];

				m = materialIndexBuffer[ i ];

				f4( scope, a, b, c, d, m );

			}

		};

		function init_faces3_smooth( nElements, offsetVertices, offsetNormals, offsetMaterials ) {

			var i, a, b, c, m;
			var na, nb, nc;

			var vertexIndexBuffer = new Uint32Array( data, offsetVertices, 3 * nElements );
			var normalIndexBuffer = new Uint32Array( data, offsetNormals, 3 * nElements );
			var materialIndexBuffer = new Uint16Array( data, offsetMaterials, nElements );

			for( i = 0; i < nElements; i ++ ) {

				a = vertexIndexBuffer[ i * 3 ];
				b = vertexIndexBuffer[ i * 3 + 1 ];
				c = vertexIndexBuffer[ i * 3 + 2 ];

				na = normalIndexBuffer[ i * 3 ];
				nb = normalIndexBuffer[ i * 3 + 1 ];
				nc = normalIndexBuffer[ i * 3 + 2 ];

				m = materialIndexBuffer[ i ];

				f3n( scope, normals, a, b, c, m, na, nb, nc );

			}

		};

		function init_faces4_smooth( nElements, offsetVertices, offsetNormals, offsetMaterials ) {

			var i, a, b, c, d, m;
			var na, nb, nc, nd;

			var vertexIndexBuffer = new Uint32Array( data, offsetVertices, 4 * nElements );
			var normalIndexBuffer = new Uint32Array( data, offsetNormals, 4 * nElements );
			var materialIndexBuffer = new Uint16Array( data, offsetMaterials, nElements );

			for( i = 0; i < nElements; i ++ ) {

				a = vertexIndexBuffer[ i * 4 ];
				b = vertexIndexBuffer[ i * 4 + 1 ];
				c = vertexIndexBuffer[ i * 4 + 2 ];
				d = vertexIndexBuffer[ i * 4 + 3 ];

				na = normalIndexBuffer[ i * 4 ];
				nb = normalIndexBuffer[ i * 4 + 1 ];
				nc = normalIndexBuffer[ i * 4 + 2 ];
				nd = normalIndexBuffer[ i * 4 + 3 ];

				m = materialIndexBuffer[ i ];

				f4n( scope, normals, a, b, c, d, m, na, nb, nc, nd );

			}

		};

		function init_triangles_flat( start ) {

			var nElements = md.ntri_flat;

			if ( nElements ) {

				var offsetMaterials = start + nElements * Uint32Array.BYTES_PER_ELEMENT * 3;
				init_faces3_flat( nElements, start, offsetMaterials );

			}

		};

		function init_triangles_flat_uv( start ) {

			var nElements = md.ntri_flat_uv;

			if ( nElements ) {

				var offsetUvs = start + nElements * Uint32Array.BYTES_PER_ELEMENT * 3;
				var offsetMaterials = offsetUvs + nElements * Uint32Array.BYTES_PER_ELEMENT * 3;

				init_faces3_flat( nElements, start, offsetMaterials );
				init_uvs3( nElements, offsetUvs );

			}

		};

		function init_triangles_smooth( start ) {

			var nElements = md.ntri_smooth;

			if ( nElements ) {

				var offsetNormals = start + nElements * Uint32Array.BYTES_PER_ELEMENT * 3;
				var offsetMaterials = offsetNormals + nElements * Uint32Array.BYTES_PER_ELEMENT * 3;

				init_faces3_smooth( nElements, start, offsetNormals, offsetMaterials );

			}

		};

		function init_triangles_smooth_uv( start ) {

			var nElements = md.ntri_smooth_uv;

			if ( nElements ) {

				var offsetNormals = start + nElements * Uint32Array.BYTES_PER_ELEMENT * 3;
				var offsetUvs = offsetNormals + nElements * Uint32Array.BYTES_PER_ELEMENT * 3;
				var offsetMaterials = offsetUvs + nElements * Uint32Array.BYTES_PER_ELEMENT * 3;

				init_faces3_smooth( nElements, start, offsetNormals, offsetMaterials );
				init_uvs3( nElements, offsetUvs );

			}

		};

		function init_quads_flat( start ) {

			var nElements = md.nquad_flat;

			if ( nElements ) {

				var offsetMaterials = start + nElements * Uint32Array.BYTES_PER_ELEMENT * 4;
				init_faces4_flat( nElements, start, offsetMaterials );

			}

		};

		function init_quads_flat_uv( start ) {

			var nElements = md.nquad_flat_uv;

			if ( nElements ) {

				var offsetUvs = start + nElements * Uint32Array.BYTES_PER_ELEMENT * 4;
				var offsetMaterials = offsetUvs + nElements * Uint32Array.BYTES_PER_ELEMENT * 4;

				init_faces4_flat( nElements, start, offsetMaterials );
				init_uvs4( nElements, offsetUvs );

			}

		};

		function init_quads_smooth( start ) {

			var nElements = md.nquad_smooth;

			if ( nElements ) {

				var offsetNormals = start + nElements * Uint32Array.BYTES_PER_ELEMENT * 4;
				var offsetMaterials = offsetNormals + nElements * Uint32Array.BYTES_PER_ELEMENT * 4;

				init_faces4_smooth( nElements, start, offsetNormals, offsetMaterials );

			}

		};

		function init_quads_smooth_uv( start ) {

			var nElements = md.nquad_smooth_uv;

			if ( nElements ) {

				var offsetNormals = start + nElements * Uint32Array.BYTES_PER_ELEMENT * 4;
				var offsetUvs = offsetNormals + nElements * Uint32Array.BYTES_PER_ELEMENT * 4;
				var offsetMaterials = offsetUvs + nElements * Uint32Array.BYTES_PER_ELEMENT * 4;

				init_faces4_smooth( nElements, start, offsetNormals, offsetMaterials );
				init_uvs4( nElements, offsetUvs );

			}

		};

	};

	function vertex ( scope, x, y, z ) {

		scope.vertices.push( new THREE.Vector3( x, y, z ) );

	};

	function f3 ( scope, a, b, c, mi ) {

		scope.faces.push( new THREE.Face3( a, b, c, null, null, mi ) );

	};

	function f4 ( scope, a, b, c, d, mi ) {

		scope.faces.push( new THREE.Face4( a, b, c, d, null, null, mi ) );

	};

	function f3n ( scope, normals, a, b, c, mi, na, nb, nc ) {

		var nax = normals[ na*3     ],
			nay = normals[ na*3 + 1 ],
			naz = normals[ na*3 + 2 ],

			nbx = normals[ nb*3     ],
			nby = normals[ nb*3 + 1 ],
			nbz = normals[ nb*3 + 2 ],

			ncx = normals[ nc*3     ],
			ncy = normals[ nc*3 + 1 ],
			ncz = normals[ nc*3 + 2 ];

		scope.faces.push( new THREE.Face3( a, b, c,
						  [new THREE.Vector3( nax, nay, naz ),
						   new THREE.Vector3( nbx, nby, nbz ),
						   new THREE.Vector3( ncx, ncy, ncz )],
						  null,
						  mi ) );

	};

	function f4n ( scope, normals, a, b, c, d, mi, na, nb, nc, nd ) {

		var nax = normals[ na*3     ],
			nay = normals[ na*3 + 1 ],
			naz = normals[ na*3 + 2 ],

			nbx = normals[ nb*3     ],
			nby = normals[ nb*3 + 1 ],
			nbz = normals[ nb*3 + 2 ],

			ncx = normals[ nc*3     ],
			ncy = normals[ nc*3 + 1 ],
			ncz = normals[ nc*3 + 2 ],

			ndx = normals[ nd*3     ],
			ndy = normals[ nd*3 + 1 ],
			ndz = normals[ nd*3 + 2 ];

		scope.faces.push( new THREE.Face4( a, b, c, d,
						  [new THREE.Vector3( nax, nay, naz ),
						   new THREE.Vector3( nbx, nby, nbz ),
						   new THREE.Vector3( ncx, ncy, ncz ),
						   new THREE.Vector3( ndx, ndy, ndz )],
						  null,
						  mi ) );

	};

	function uv3 ( where, u1, v1, u2, v2, u3, v3 ) {

		where.push( [
			new THREE.UV( u1, v1 ),
			new THREE.UV( u2, v2 ),
			new THREE.UV( u3, v3 )
		] );

	};

	function uv4 ( where, u1, v1, u2, v2, u3, v3, u4, v4 ) {

		where.push( [
			new THREE.UV( u1, v1 ),
			new THREE.UV( u2, v2 ),
			new THREE.UV( u3, v3 ),
			new THREE.UV( u4, v4 )
		] );
	};

	Model.prototype = Object.create( THREE.Geometry.prototype );

	var geometry = new Model( texturePath );
	var materials = this.initMaterials( jsonMaterials, texturePath );

	if ( this.needsTangents( materials ) ) geometry.computeTangents();

	callback( geometry, materials );

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.ImageLoader = function () {

	THREE.EventTarget.call( this );

	this.crossOrigin = null;

};

THREE.ImageLoader.prototype = {

	constructor: THREE.ImageLoader,

	load: function ( url, image ) {

		var scope = this;

		if ( image === undefined ) image = new Image();

		image.addEventListener( 'load', function () {

			scope.dispatchEvent( { type: 'load', content: image } );

		}, false );

		image.addEventListener( 'error', function () {

			scope.dispatchEvent( { type: 'error', message: 'Couldn\'t load URL [' + url + ']' } );

		}, false );

		if ( scope.crossOrigin ) image.crossOrigin = scope.crossOrigin;

		image.src = url;

	}

}
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.JSONLoader = function ( showStatus ) {

	THREE.Loader.call( this, showStatus );

	this.withCredentials = false;

};

THREE.JSONLoader.prototype = Object.create( THREE.Loader.prototype );

THREE.JSONLoader.prototype.load = function ( url, callback, texturePath ) {

	var scope = this;

	// todo: unify load API to for easier SceneLoader use

	texturePath = texturePath && ( typeof texturePath === "string" ) ? texturePath : this.extractUrlBase( url );

	this.onLoadStart();
	this.loadAjaxJSON( this, url, callback, texturePath );

};

THREE.JSONLoader.prototype.loadAjaxJSON = function ( context, url, callback, texturePath, callbackProgress ) {

	var xhr = new XMLHttpRequest();

	var length = 0;

	xhr.withCredentials = this.withCredentials;

	xhr.onreadystatechange = function () {

		if ( xhr.readyState === xhr.DONE ) {

			if ( xhr.status === 200 || xhr.status === 0 ) {

				if ( xhr.responseText ) {

					var json = JSON.parse( xhr.responseText );
					context.createModel( json, callback, texturePath );

				} else {

					console.warn( "THREE.JSONLoader: [" + url + "] seems to be unreachable or file there is empty" );

				}

				// in context of more complex asset initialization
				// do not block on single failed file
				// maybe should go even one more level up

				context.onLoadComplete();

			} else {

				console.error( "THREE.JSONLoader: Couldn't load [" + url + "] [" + xhr.status + "]" );

			}

		} else if ( xhr.readyState === xhr.LOADING ) {

			if ( callbackProgress ) {

				if ( length === 0 ) {

					length = xhr.getResponseHeader( "Content-Length" );

				}

				callbackProgress( { total: length, loaded: xhr.responseText.length } );

			}

		} else if ( xhr.readyState === xhr.HEADERS_RECEIVED ) {

			length = xhr.getResponseHeader( "Content-Length" );

		}

	};

	xhr.open( "GET", url, true );
	xhr.send( null );

};

THREE.JSONLoader.prototype.createModel = function ( json, callback, texturePath ) {

	var scope = this,
	geometry = new THREE.Geometry(),
	scale = ( json.scale !== undefined ) ? 1.0 / json.scale : 1.0;

	parseModel( scale );

	parseSkin();
	parseMorphing( scale );

	geometry.computeCentroids();
	geometry.computeFaceNormals();

	function parseModel( scale ) {

		function isBitSet( value, position ) {

			return value & ( 1 << position );

		}

		var i, j, fi,

		offset, zLength, nVertices,

		colorIndex, normalIndex, uvIndex, materialIndex,

		type,
		isQuad,
		hasMaterial,
		hasFaceUv, hasFaceVertexUv,
		hasFaceNormal, hasFaceVertexNormal,
		hasFaceColor, hasFaceVertexColor,

		vertex, face, color, normal,

		uvLayer, uvs, u, v,

		faces = json.faces,
		vertices = json.vertices,
		normals = json.normals,
		colors = json.colors,

		nUvLayers = 0;

		// disregard empty arrays

		for ( i = 0; i < json.uvs.length; i++ ) {

			if ( json.uvs[ i ].length ) nUvLayers ++;

		}

		for ( i = 0; i < nUvLayers; i++ ) {

			geometry.faceUvs[ i ] = [];
			geometry.faceVertexUvs[ i ] = [];

		}

		offset = 0;
		zLength = vertices.length;

		while ( offset < zLength ) {

			vertex = new THREE.Vector3();

			vertex.x = vertices[ offset ++ ] * scale;
			vertex.y = vertices[ offset ++ ] * scale;
			vertex.z = vertices[ offset ++ ] * scale;

			geometry.vertices.push( vertex );

		}

		offset = 0;
		zLength = faces.length;

		while ( offset < zLength ) {

			type = faces[ offset ++ ];


			isQuad          	= isBitSet( type, 0 );
			hasMaterial         = isBitSet( type, 1 );
			hasFaceUv           = isBitSet( type, 2 );
			hasFaceVertexUv     = isBitSet( type, 3 );
			hasFaceNormal       = isBitSet( type, 4 );
			hasFaceVertexNormal = isBitSet( type, 5 );
			hasFaceColor	    = isBitSet( type, 6 );
			hasFaceVertexColor  = isBitSet( type, 7 );

			//console.log("type", type, "bits", isQuad, hasMaterial, hasFaceUv, hasFaceVertexUv, hasFaceNormal, hasFaceVertexNormal, hasFaceColor, hasFaceVertexColor);

			if ( isQuad ) {

				face = new THREE.Face4();

				face.a = faces[ offset ++ ];
				face.b = faces[ offset ++ ];
				face.c = faces[ offset ++ ];
				face.d = faces[ offset ++ ];

				nVertices = 4;

			} else {

				face = new THREE.Face3();

				face.a = faces[ offset ++ ];
				face.b = faces[ offset ++ ];
				face.c = faces[ offset ++ ];

				nVertices = 3;

			}

			if ( hasMaterial ) {

				materialIndex = faces[ offset ++ ];
				face.materialIndex = materialIndex;

			}

			// to get face <=> uv index correspondence

			fi = geometry.faces.length;

			if ( hasFaceUv ) {

				for ( i = 0; i < nUvLayers; i++ ) {

					uvLayer = json.uvs[ i ];

					uvIndex = faces[ offset ++ ];

					u = uvLayer[ uvIndex * 2 ];
					v = uvLayer[ uvIndex * 2 + 1 ];

					geometry.faceUvs[ i ][ fi ] = new THREE.UV( u, v );

				}

			}

			if ( hasFaceVertexUv ) {

				for ( i = 0; i < nUvLayers; i++ ) {

					uvLayer = json.uvs[ i ];

					uvs = [];

					for ( j = 0; j < nVertices; j ++ ) {

						uvIndex = faces[ offset ++ ];

						u = uvLayer[ uvIndex * 2 ];
						v = uvLayer[ uvIndex * 2 + 1 ];

						uvs[ j ] = new THREE.UV( u, v );

					}

					geometry.faceVertexUvs[ i ][ fi ] = uvs;

				}

			}

			if ( hasFaceNormal ) {

				normalIndex = faces[ offset ++ ] * 3;

				normal = new THREE.Vector3();

				normal.x = normals[ normalIndex ++ ];
				normal.y = normals[ normalIndex ++ ];
				normal.z = normals[ normalIndex ];

				face.normal = normal;

			}

			if ( hasFaceVertexNormal ) {

				for ( i = 0; i < nVertices; i++ ) {

					normalIndex = faces[ offset ++ ] * 3;

					normal = new THREE.Vector3();

					normal.x = normals[ normalIndex ++ ];
					normal.y = normals[ normalIndex ++ ];
					normal.z = normals[ normalIndex ];

					face.vertexNormals.push( normal );

				}

			}


			if ( hasFaceColor ) {

				colorIndex = faces[ offset ++ ];

				color = new THREE.Color( colors[ colorIndex ] );
				face.color = color;

			}


			if ( hasFaceVertexColor ) {

				for ( i = 0; i < nVertices; i++ ) {

					colorIndex = faces[ offset ++ ];

					color = new THREE.Color( colors[ colorIndex ] );
					face.vertexColors.push( color );

				}

			}

			geometry.faces.push( face );

		}

	};

	function parseSkin() {

		var i, l, x, y, z, w, a, b, c, d;

		if ( json.skinWeights ) {

			for ( i = 0, l = json.skinWeights.length; i < l; i += 2 ) {

				x = json.skinWeights[ i     ];
				y = json.skinWeights[ i + 1 ];
				z = 0;
				w = 0;

				geometry.skinWeights.push( new THREE.Vector4( x, y, z, w ) );

			}

		}

		if ( json.skinIndices ) {

			for ( i = 0, l = json.skinIndices.length; i < l; i += 2 ) {

				a = json.skinIndices[ i     ];
				b = json.skinIndices[ i + 1 ];
				c = 0;
				d = 0;

				geometry.skinIndices.push( new THREE.Vector4( a, b, c, d ) );

			}

		}

		geometry.bones = json.bones;
		geometry.animation = json.animation;

	};

	function parseMorphing( scale ) {

		if ( json.morphTargets !== undefined ) {

			var i, l, v, vl, dstVertices, srcVertices;

			for ( i = 0, l = json.morphTargets.length; i < l; i ++ ) {

				geometry.morphTargets[ i ] = {};
				geometry.morphTargets[ i ].name = json.morphTargets[ i ].name;
				geometry.morphTargets[ i ].vertices = [];

				dstVertices = geometry.morphTargets[ i ].vertices;
				srcVertices = json.morphTargets [ i ].vertices;

				for( v = 0, vl = srcVertices.length; v < vl; v += 3 ) {

					var vertex = new THREE.Vector3();
					vertex.x = srcVertices[ v ] * scale;
					vertex.y = srcVertices[ v + 1 ] * scale;
					vertex.z = srcVertices[ v + 2 ] * scale;

					dstVertices.push( vertex );

				}

			}

		}

		if ( json.morphColors !== undefined ) {

			var i, l, c, cl, dstColors, srcColors, color;

			for ( i = 0, l = json.morphColors.length; i < l; i++ ) {

				geometry.morphColors[ i ] = {};
				geometry.morphColors[ i ].name = json.morphColors[ i ].name;
				geometry.morphColors[ i ].colors = [];

				dstColors = geometry.morphColors[ i ].colors;
				srcColors = json.morphColors [ i ].colors;

				for ( c = 0, cl = srcColors.length; c < cl; c += 3 ) {

					color = new THREE.Color( 0xffaa00 );
					color.setRGB( srcColors[ c ], srcColors[ c + 1 ], srcColors[ c + 2 ] );
					dstColors.push( color );

				}

			}

		}

	};

	var materials = this.initMaterials( json.materials, texturePath );

	if ( this.needsTangents( materials ) ) geometry.computeTangents();

	callback( geometry, materials );

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.LoadingMonitor = function () {

	THREE.EventTarget.call( this );

	var scope = this;

	var loaded = 0;
	var total = 0;

	var onLoad = function ( event ) {

		loaded ++;

		scope.dispatchEvent( { type: 'progress', loaded: loaded, total: total } );

		if ( loaded === total ) {

			scope.dispatchEvent( { type: 'load' } );

		}

	};

	this.add = function ( loader ) {

		total ++;

		loader.addEventListener( 'load', onLoad, false );

	};

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.SceneLoader = function () {

	this.onLoadStart = function () {};
	this.onLoadProgress = function() {};
	this.onLoadComplete = function () {};

	this.callbackSync = function () {};
	this.callbackProgress = function () {};

	this.geometryHandlerMap = {};
	this.hierarchyHandlerMap = {};

	this.addGeometryHandler( "ascii", THREE.JSONLoader );
	this.addGeometryHandler( "binary", THREE.BinaryLoader );

};

THREE.SceneLoader.prototype.constructor = THREE.SceneLoader;

THREE.SceneLoader.prototype.load = function ( url, callbackFinished ) {

	var scope = this;

	var xhr = new XMLHttpRequest();

	xhr.onreadystatechange = function () {

		if ( xhr.readyState === 4 ) {

			if ( xhr.status === 200 || xhr.status === 0 ) {

				var json = JSON.parse( xhr.responseText );
				scope.parse( json, callbackFinished, url );

			} else {

				console.error( "THREE.SceneLoader: Couldn't load [" + url + "] [" + xhr.status + "]" );

			}

		}

	};

	xhr.open( "GET", url, true );
	xhr.send( null );

};

THREE.SceneLoader.prototype.addGeometryHandler = function ( typeID, loaderClass ) {

	this.geometryHandlerMap[ typeID ] = { "loaderClass": loaderClass };

};

THREE.SceneLoader.prototype.addHierarchyHandler = function ( typeID, loaderClass ) {

	this.hierarchyHandlerMap[ typeID ] = { "loaderClass": loaderClass };

};

THREE.SceneLoader.prototype.parse = function ( json, callbackFinished, url ) {

	var scope = this;

	var urlBase = THREE.Loader.prototype.extractUrlBase( url );

	var dg, dm, dc, df, dt,
		g, m, l, d, p, r, q, s, c, t, f, tt, pp, u,
		geometry, material, camera, fog,
		texture, images,
		light, hex, intensity,
		counter_models, counter_textures,
		total_models, total_textures,
		result;

	var target_array = [];

	var data = json;

	// async geometry loaders

	for ( var typeID in this.geometryHandlerMap ) {

		var loaderClass = this.geometryHandlerMap[ typeID ][ "loaderClass" ];
		this.geometryHandlerMap[ typeID ][ "loaderObject" ] = new loaderClass();

	}

	// async hierachy loaders

	for ( var typeID in this.hierarchyHandlerMap ) {

		var loaderClass = this.hierarchyHandlerMap[ typeID ][ "loaderClass" ];
		this.hierarchyHandlerMap[ typeID ][ "loaderObject" ] = new loaderClass();

	}

	counter_models = 0;
	counter_textures = 0;

	result = {

		scene: new THREE.Scene(),
		geometries: {},
		face_materials: {},
		materials: {},
		textures: {},
		objects: {},
		cameras: {},
		lights: {},
		fogs: {},
		empties: {}

	};

	if ( data.transform ) {

		var position = data.transform.position,
			rotation = data.transform.rotation,
			scale = data.transform.scale;

		if ( position )
			result.scene.position.set( position[ 0 ], position[ 1 ], position [ 2 ] );

		if ( rotation )
			result.scene.rotation.set( rotation[ 0 ], rotation[ 1 ], rotation [ 2 ] );

		if ( scale )
			result.scene.scale.set( scale[ 0 ], scale[ 1 ], scale [ 2 ] );

		if ( position || rotation || scale ) {

			result.scene.updateMatrix();
			result.scene.updateMatrixWorld();

		}

	}

	function get_url( source_url, url_type ) {

		if ( url_type == "relativeToHTML" ) {

			return source_url;

		} else {

			return urlBase + "/" + source_url;

		}

	};

	// toplevel loader function, delegates to handle_children

	function handle_objects() {

		handle_children( result.scene, data.objects );

	}

	// handle all the children from the loaded json and attach them to given parent

	function handle_children( parent, children ) {

		for ( var dd in children ) {

			// check by id if child has already been handled,
			// if not, create new object

			if ( result.objects[ dd ] === undefined ) {

				var o = children[ dd ];

				var object = null;

				// meshes

				if ( o.type && ( o.type in scope.hierarchyHandlerMap ) && o.loading === undefined ) {

					var loaderParameters = {};

					for ( var parType in g ) {

						if ( parType !== "type" && parType !== "url" ) {

							loaderParameters[ parType ] = g[ parType ];

						}

					}

					material = result.materials[ o.material ];

					o.loading = true;

					var loader = scope.hierarchyHandlerMap[ o.type ][ "loaderObject" ];

					// OBJLoader

					if ( loader.addEventListener ) {

						loader.addEventListener( 'load', create_callback_hierachy( dd, parent, material, o ) );
						loader.load( get_url( o.url, data.urlBaseType ) );

					} else {

						// ColladaLoader

						if ( loader.options ) {

							loader.load( get_url( o.url, data.urlBaseType ), create_callback_hierachy( dd, parent, material, o ) );

						// UTF8Loader

						} else {

							loader.load( get_url( o.url, data.urlBaseType ), create_callback_hierachy( dd, parent, material, o ), loaderParameters );

						}

					}

				} else if ( o.geometry !== undefined ) {

					geometry = result.geometries[ o.geometry ];

					// geometry already loaded

					if ( geometry ) {

						var needsTangents = false;

						material = result.materials[ o.material ];
						needsTangents = material instanceof THREE.ShaderMaterial;

						p = o.position;
						r = o.rotation;
						q = o.quaternion;
						s = o.scale;
						m = o.matrix;

						// turn off quaternions, for the moment

						q = 0;

						// use materials from the model file
						// if there is no material specified in the object

						if ( ! o.material ) {

							material = new THREE.MeshFaceMaterial( result.face_materials[ o.geometry ] );

						}

						// use materials from the model file
						// if there is just empty face material
						// (must create new material as each model has its own face material)

						if ( ( material instanceof THREE.MeshFaceMaterial ) && material.materials.length === 0 ) {

							material = new THREE.MeshFaceMaterial( result.face_materials[ o.geometry ] );

						}

						if ( material instanceof THREE.MeshFaceMaterial ) {

							for ( var i = 0; i < material.materials.length; i ++ ) {

								needsTangents = needsTangents || ( material.materials[ i ] instanceof THREE.ShaderMaterial );

							}

						}

						if ( needsTangents ) {

							geometry.computeTangents();

						}

						if ( o.skin ) {

							object = new THREE.SkinnedMesh( geometry, material );

						} else if ( o.morph ) {

							object = new THREE.MorphAnimMesh( geometry, material );

							if ( o.duration !== undefined ) {

								object.duration = o.duration;

							}

							if ( o.time !== undefined ) {

								object.time = o.time;

							}

							if ( o.mirroredLoop !== undefined ) {

								object.mirroredLoop = o.mirroredLoop;

							}

							if ( material.morphNormals ) {

								geometry.computeMorphNormals();

							}

						} else {

							object = new THREE.Mesh( geometry, material );

						}

						object.name = dd;

						if ( m ) {

							object.matrixAutoUpdate = false;
							object.matrix.set(
								m[0], m[1], m[2], m[3],
								m[4], m[5], m[6], m[7],
								m[8], m[9], m[10], m[11],
								m[12], m[13], m[14], m[15]
							);

						} else {

							object.position.set( p[0], p[1], p[2] );

							if ( q ) {

								object.quaternion.set( q[0], q[1], q[2], q[3] );
								object.useQuaternion = true;

							} else {

								object.rotation.set( r[0], r[1], r[2] );

							}

							object.scale.set( s[0], s[1], s[2] );

						}

						object.visible = o.visible;
						object.castShadow = o.castShadow;
						object.receiveShadow = o.receiveShadow;

						parent.add( object );

						result.objects[ dd ] = object;

					}

				// lights

				} else if ( o.type === "DirectionalLight" || o.type === "PointLight" || o.type === "AmbientLight" ) {

					hex = ( o.color !== undefined ) ? o.color : 0xffffff;
					intensity = ( o.intensity !== undefined ) ? o.intensity : 1;

					if ( o.type === "DirectionalLight" ) {

						p = o.direction;

						light = new THREE.DirectionalLight( hex, intensity );
						light.position.set( p[0], p[1], p[2] );

						if ( o.target ) {

							target_array.push( { "object": light, "targetName" : o.target } );

							// kill existing default target
							// otherwise it gets added to scene when parent gets added

							light.target = null;

						}

					} else if ( o.type === "PointLight" ) {

						p = o.position;
						d = o.distance;

						light = new THREE.PointLight( hex, intensity, d );
						light.position.set( p[0], p[1], p[2] );

					} else if ( o.type === "AmbientLight" ) {

						light = new THREE.AmbientLight( hex );

					}

					parent.add( light );

					light.name = dd;
					result.lights[ dd ] = light;
					result.objects[ dd ] = light;

				// cameras

				} else if ( o.type === "PerspectiveCamera" || o.type === "OrthographicCamera" ) {

					if ( o.type === "PerspectiveCamera" ) {

						camera = new THREE.PerspectiveCamera( o.fov, o.aspect, o.near, o.far );

					} else if ( o.type === "OrthographicCamera" ) {

						camera = new THREE.OrthographicCamera( c.left, c.right, c.top, c.bottom, c.near, c.far );

					}

					p = o.position;
					camera.position.set( p[0], p[1], p[2] );
					parent.add( camera );

					camera.name = dd;
					result.cameras[ dd ] = camera;
					result.objects[ dd ] = camera;

				// pure Object3D

				} else {

					p = o.position;
					r = o.rotation;
					q = o.quaternion;
					s = o.scale;

					// turn off quaternions, for the moment

					q = 0;

					object = new THREE.Object3D();
					object.name = dd;
					object.position.set( p[0], p[1], p[2] );

					if ( q ) {

						object.quaternion.set( q[0], q[1], q[2], q[3] );
						object.useQuaternion = true;

					} else {

						object.rotation.set( r[0], r[1], r[2] );

					}

					object.scale.set( s[0], s[1], s[2] );
					object.visible = ( o.visible !== undefined ) ? o.visible : false;

					parent.add( object );

					result.objects[ dd ] = object;
					result.empties[ dd ] = object;

				}

				if ( object ) {

					if ( o.properties !== undefined )  {

						for ( var key in o.properties ) {

							var value = o.properties[ key ];
							object.properties[ key ] = value;

						}

					}

					if ( o.children !== undefined ) {

						handle_children( object, o.children );

					}

				}

			}

		}

	};

	function handle_mesh( geo, mat, id ) {

		result.geometries[ id ] = geo;
		result.face_materials[ id ] = mat;
		handle_objects();

	};

	function handle_hierarchy( node, id, parent, material, o ) {

		var p = o.position;
		var r = o.rotation;
		var q = o.quaternion;
		var s = o.scale;

		node.position.set( p[0], p[1], p[2] );

		if ( q ) {

			node.quaternion.set( q[0], q[1], q[2], q[3] );
			node.useQuaternion = true;

		} else {

			node.rotation.set( r[0], r[1], r[2] );

		}

		node.scale.set( s[0], s[1], s[2] );

		if ( material ) {

			node.traverse( function ( child )  {

				child.material = material;

			} );

		}

		parent.add( node );

		result.objects[ id ] = node;
		handle_objects();

	};

	function create_callback_geometry( id ) {

		return function( geo, mat ) {

			handle_mesh( geo, mat, id );

			counter_models -= 1;

			scope.onLoadComplete();

			async_callback_gate();

		}

	};

	function create_callback_hierachy( id, parent, material, obj ) {

		return function( event ) {

			var result;

			// loaders which use EventTarget

			if ( event.content ) {

				result = event.content;

			// ColladaLoader

			} else if ( event.dae ) {

				result = event.scene;


			// UTF8Loader

			} else {

				result = event;

			}

			handle_hierarchy( result, id, parent, material, obj );

			counter_models -= 1;

			scope.onLoadComplete();

			async_callback_gate();

		}

	};

	function create_callback_embed( id ) {

		return function( geo, mat ) {

			result.geometries[ id ] = geo;
			result.face_materials[ id ] = mat;

		}

	};

	function async_callback_gate() {

		var progress = {

			totalModels : total_models,
			totalTextures : total_textures,
			loadedModels : total_models - counter_models,
			loadedTextures : total_textures - counter_textures

		};

		scope.callbackProgress( progress, result );

		scope.onLoadProgress();

		if ( counter_models === 0 && counter_textures === 0 ) {

			finalize();
			callbackFinished( result );

		}

	};

	function finalize() {

		// take care of targets which could be asynchronously loaded objects

		for ( var i = 0; i < target_array.length; i ++ ) {

			var ta = target_array[ i ];

			var target = result.objects[ ta.targetName ];

			if ( target ) {

				ta.object.target = target;

			} else {

				// if there was error and target of specified name doesn't exist in the scene file
				// create instead dummy target
				// (target must be added to scene explicitly as parent is already added)

				ta.object.target = new THREE.Object3D();
				result.scene.add( ta.object.target );

			}

			ta.object.target.properties.targetInverse = ta.object;

		}

	};

	var callbackTexture = function ( count ) {

		counter_textures -= count;
		async_callback_gate();

		scope.onLoadComplete();

	};

	// must use this instead of just directly calling callbackTexture
	// because of closure in the calling context loop

	var generateTextureCallback = function ( count ) {

		return function() {

			callbackTexture( count );

		};

	};

	// first go synchronous elements

	// fogs

	for ( df in data.fogs ) {

		f = data.fogs[ df ];

		if ( f.type === "linear" ) {

			fog = new THREE.Fog( 0x000000, f.near, f.far );

		} else if ( f.type === "exp2" ) {

			fog = new THREE.FogExp2( 0x000000, f.density );

		}

		c = f.color;
		fog.color.setRGB( c[0], c[1], c[2] );

		result.fogs[ df ] = fog;

	}

	// now come potentially asynchronous elements

	// geometries

	// count how many geometries will be loaded asynchronously

	for ( dg in data.geometries ) {

		g = data.geometries[ dg ];

		if ( g.type in this.geometryHandlerMap ) {

			counter_models += 1;

			scope.onLoadStart();

		}

	}

	// count how many hierarchies will be loaded asynchronously

	for ( var dd in data.objects ) {

		var o = data.objects[ dd ];

		if ( o.type && ( o.type in this.hierarchyHandlerMap ) ) {

			counter_models += 1;

			scope.onLoadStart();

		}

	}

	total_models = counter_models;

	for ( dg in data.geometries ) {

		g = data.geometries[ dg ];

		if ( g.type === "cube" ) {

			geometry = new THREE.CubeGeometry( g.width, g.height, g.depth, g.widthSegments, g.heightSegments, g.depthSegments );
			result.geometries[ dg ] = geometry;

		} else if ( g.type === "plane" ) {

			geometry = new THREE.PlaneGeometry( g.width, g.height, g.widthSegments, g.heightSegments );
			result.geometries[ dg ] = geometry;

		} else if ( g.type === "sphere" ) {

			geometry = new THREE.SphereGeometry( g.radius, g.widthSegments, g.heightSegments );
			result.geometries[ dg ] = geometry;

		} else if ( g.type === "cylinder" ) {

			geometry = new THREE.CylinderGeometry( g.topRad, g.botRad, g.height, g.radSegs, g.heightSegs );
			result.geometries[ dg ] = geometry;

		} else if ( g.type === "torus" ) {

			geometry = new THREE.TorusGeometry( g.radius, g.tube, g.segmentsR, g.segmentsT );
			result.geometries[ dg ] = geometry;

		} else if ( g.type === "icosahedron" ) {

			geometry = new THREE.IcosahedronGeometry( g.radius, g.subdivisions );
			result.geometries[ dg ] = geometry;

		} else if ( g.type in this.geometryHandlerMap ) {

			var loaderParameters = {};
			for ( var parType in g ) {

				if ( parType !== "type" && parType !== "url" ) {

					loaderParameters[ parType ] = g[ parType ];

				}

			}

			var loader = this.geometryHandlerMap[ g.type ][ "loaderObject" ];
			loader.load( get_url( g.url, data.urlBaseType ), create_callback_geometry( dg ), loaderParameters );

		} else if ( g.type === "embedded" ) {

			var modelJson = data.embeds[ g.id ],
				texture_path = "";

			// pass metadata along to jsonLoader so it knows the format version

			modelJson.metadata = data.metadata;

			if ( modelJson ) {

				var jsonLoader = this.geometryHandlerMap[ "ascii" ][ "loaderObject" ];
				jsonLoader.createModel( modelJson, create_callback_embed( dg ), texture_path );

			}

		}

	}

	// textures

	// count how many textures will be loaded asynchronously

	for ( dt in data.textures ) {

		tt = data.textures[ dt ];

		if ( tt.url instanceof Array ) {

			counter_textures += tt.url.length;

			for( var n = 0; n < tt.url.length; n ++ ) {

				scope.onLoadStart();

			}

		} else {

			counter_textures += 1;

			scope.onLoadStart();

		}

	}

	total_textures = counter_textures;

	for ( dt in data.textures ) {

		tt = data.textures[ dt ];

		if ( tt.mapping !== undefined && THREE[ tt.mapping ] !== undefined  ) {

			tt.mapping = new THREE[ tt.mapping ]();

		}

		if ( tt.url instanceof Array ) {

			var count = tt.url.length;
			var url_array = [];

			for( var i = 0; i < count; i ++ ) {

				url_array[ i ] = get_url( tt.url[ i ], data.urlBaseType );

			}

			var isCompressed = url_array[ 0 ].endsWith( ".dds" );

			if ( isCompressed ) {

				texture = THREE.ImageUtils.loadCompressedTextureCube( url_array, tt.mapping, generateTextureCallback( count ) );

			} else {

				texture = THREE.ImageUtils.loadTextureCube( url_array, tt.mapping, generateTextureCallback( count ) );

			}

		} else {

			var isCompressed = tt.url.toLowerCase().endsWith( ".dds" );
			var fullUrl = get_url( tt.url, data.urlBaseType );
			var textureCallback = generateTextureCallback( 1 );

			if ( isCompressed ) {

				texture = THREE.ImageUtils.loadCompressedTexture( fullUrl, tt.mapping, textureCallback );

			} else {

				texture = THREE.ImageUtils.loadTexture( fullUrl, tt.mapping, textureCallback );

			}

			if ( THREE[ tt.minFilter ] !== undefined )
				texture.minFilter = THREE[ tt.minFilter ];

			if ( THREE[ tt.magFilter ] !== undefined )
				texture.magFilter = THREE[ tt.magFilter ];

			if ( tt.anisotropy ) texture.anisotropy = tt.anisotropy;

			if ( tt.repeat ) {

				texture.repeat.set( tt.repeat[ 0 ], tt.repeat[ 1 ] );

				if ( tt.repeat[ 0 ] !== 1 ) texture.wrapS = THREE.RepeatWrapping;
				if ( tt.repeat[ 1 ] !== 1 ) texture.wrapT = THREE.RepeatWrapping;

			}

			if ( tt.offset ) {

				texture.offset.set( tt.offset[ 0 ], tt.offset[ 1 ] );

			}

			// handle wrap after repeat so that default repeat can be overriden

			if ( tt.wrap ) {

				var wrapMap = {
				"repeat" 	: THREE.RepeatWrapping,
				"mirror"	: THREE.MirroredRepeatWrapping
				}

				if ( wrapMap[ tt.wrap[ 0 ] ] !== undefined ) texture.wrapS = wrapMap[ tt.wrap[ 0 ] ];
				if ( wrapMap[ tt.wrap[ 1 ] ] !== undefined ) texture.wrapT = wrapMap[ tt.wrap[ 1 ] ];

			}

		}

		result.textures[ dt ] = texture;

	}

	// materials

	for ( dm in data.materials ) {

		m = data.materials[ dm ];

		for ( pp in m.parameters ) {

			if ( pp === "envMap" || pp === "map" || pp === "lightMap" || pp === "bumpMap" ) {

				m.parameters[ pp ] = result.textures[ m.parameters[ pp ] ];

			} else if ( pp === "shading" ) {

				m.parameters[ pp ] = ( m.parameters[ pp ] === "flat" ) ? THREE.FlatShading : THREE.SmoothShading;

			} else if ( pp === "side" ) {

				if (  m.parameters[ pp ] == "double" ) {

					m.parameters[ pp ] = THREE.DoubleSide;

				} else if ( m.parameters[ pp ] == "back" ) {

					m.parameters[ pp ] = THREE.BackSide;

				} else {

					m.parameters[ pp ] = THREE.FrontSide;

				}

			} else if ( pp === "blending" ) {

				m.parameters[ pp ] = m.parameters[ pp ] in THREE ? THREE[ m.parameters[ pp ] ] : THREE.NormalBlending;

			} else if ( pp === "combine" ) {

				m.parameters[ pp ] = ( m.parameters[ pp ] == "MixOperation" ) ? THREE.MixOperation : THREE.MultiplyOperation;

			} else if ( pp === "vertexColors" ) {

				if ( m.parameters[ pp ] == "face" ) {

					m.parameters[ pp ] = THREE.FaceColors;

				// default to vertex colors if "vertexColors" is anything else face colors or 0 / null / false

				} else if ( m.parameters[ pp ] )   {

					m.parameters[ pp ] = THREE.VertexColors;

				}

			} else if ( pp === "wrapRGB" ) {

				var v3 = m.parameters[ pp ];
				m.parameters[ pp ] = new THREE.Vector3( v3[ 0 ], v3[ 1 ], v3[ 2 ] );

			}

		}

		if ( m.parameters.opacity !== undefined && m.parameters.opacity < 1.0 ) {

			m.parameters.transparent = true;

		}

		if ( m.parameters.normalMap ) {

			var shader = THREE.ShaderUtils.lib[ "normal" ];
			var uniforms = THREE.UniformsUtils.clone( shader.uniforms );

			var diffuse = m.parameters.color;
			var specular = m.parameters.specular;
			var ambient = m.parameters.ambient;
			var shininess = m.parameters.shininess;

			uniforms[ "tNormal" ].value = result.textures[ m.parameters.normalMap ];

			if ( m.parameters.normalScale ) {

				uniforms[ "uNormalScale" ].value.set( m.parameters.normalScale[ 0 ], m.parameters.normalScale[ 1 ] );

			}

			if ( m.parameters.map ) {

				uniforms[ "tDiffuse" ].value = m.parameters.map;
				uniforms[ "enableDiffuse" ].value = true;

			}

			if ( m.parameters.envMap ) {

				uniforms[ "tCube" ].value = m.parameters.envMap;
				uniforms[ "enableReflection" ].value = true;
				uniforms[ "uReflectivity" ].value = m.parameters.reflectivity;

			}

			if ( m.parameters.lightMap ) {

				uniforms[ "tAO" ].value = m.parameters.lightMap;
				uniforms[ "enableAO" ].value = true;

			}

			if ( m.parameters.specularMap ) {

				uniforms[ "tSpecular" ].value = result.textures[ m.parameters.specularMap ];
				uniforms[ "enableSpecular" ].value = true;

			}

			if ( m.parameters.displacementMap ) {

				uniforms[ "tDisplacement" ].value = result.textures[ m.parameters.displacementMap ];
				uniforms[ "enableDisplacement" ].value = true;

				uniforms[ "uDisplacementBias" ].value = m.parameters.displacementBias;
				uniforms[ "uDisplacementScale" ].value = m.parameters.displacementScale;

			}

			uniforms[ "uDiffuseColor" ].value.setHex( diffuse );
			uniforms[ "uSpecularColor" ].value.setHex( specular );
			uniforms[ "uAmbientColor" ].value.setHex( ambient );

			uniforms[ "uShininess" ].value = shininess;

			if ( m.parameters.opacity ) {

				uniforms[ "uOpacity" ].value = m.parameters.opacity;

			}

			var parameters = { fragmentShader: shader.fragmentShader, vertexShader: shader.vertexShader, uniforms: uniforms, lights: true, fog: true };

			material = new THREE.ShaderMaterial( parameters );

		} else {

			material = new THREE[ m.type ]( m.parameters );

		}

		result.materials[ dm ] = material;

	}

	// second pass through all materials to initialize MeshFaceMaterials
	// that could be referring to other materials out of order

	for ( dm in data.materials ) {

		m = data.materials[ dm ];

		if ( m.parameters.materials ) {

			var materialArray = [];

			for ( var i = 0; i < m.parameters.materials.length; i ++ ) {

				var label = m.parameters.materials[ i ];
				materialArray.push( result.materials[ label ] );

			}

			result.materials[ dm ].materials = materialArray;

		}

	}

	// objects ( synchronous init of procedural primitives )

	handle_objects();

	// defaults

	if ( result.cameras && data.defaults.camera ) {

		result.currentCamera = result.cameras[ data.defaults.camera ];

	}

	if ( result.fogs && data.defaults.fog ) {

		result.scene.fog = result.fogs[ data.defaults.fog ];

	}

	c = data.defaults.bgcolor;
	result.bgColor = new THREE.Color();
	result.bgColor.setRGB( c[0], c[1], c[2] );

	result.bgColorAlpha = data.defaults.bgalpha;

	// synchronous callback

	scope.callbackSync( result );

	// just in case there are no async elements

	async_callback_gate();

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.TextureLoader = function () {

	THREE.EventTarget.call( this );

	this.crossOrigin = null;

};

THREE.TextureLoader.prototype = {

	constructor: THREE.TextureLoader,

	load: function ( url ) {

		var scope = this;

		var image = new Image();

		image.addEventListener( 'load', function () {

			var texture = new THREE.Texture( image );
			texture.needsUpdate = true;

			scope.dispatchEvent( { type: 'load', content: texture } );

		}, false );

		image.addEventListener( 'error', function () {

			scope.dispatchEvent( { type: 'error', message: 'Couldn\'t load URL [' + url + ']' } );

		}, false );

		if ( scope.crossOrigin ) image.crossOrigin = scope.crossOrigin;

		image.src = url;

	}

}
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Material = function () {

	THREE.MaterialLibrary.push( this );

	this.id = THREE.MaterialIdCount ++;

	this.name = '';

	this.side = THREE.FrontSide;

	this.opacity = 1;
	this.transparent = false;

	this.blending = THREE.NormalBlending;

	this.blendSrc = THREE.SrcAlphaFactor;
	this.blendDst = THREE.OneMinusSrcAlphaFactor;
	this.blendEquation = THREE.AddEquation;

	this.depthTest = true;
	this.depthWrite = true;

	this.polygonOffset = false;
	this.polygonOffsetFactor = 0;
	this.polygonOffsetUnits = 0;

	this.alphaTest = 0;

	this.overdraw = false; // Boolean for fixing antialiasing gaps in CanvasRenderer

	this.visible = true;

	this.needsUpdate = true;

};

THREE.Material.prototype.setValues = function ( values ) {

	if ( values === undefined ) return;

	for ( var key in values ) {

		var newValue = values[ key ];

		if ( newValue === undefined ) {

			console.warn( 'THREE.Material: \'' + key + '\' parameter is undefined.' );
			continue;

		}

		if ( key in this ) {

			var currentValue = this[ key ];

			if ( currentValue instanceof THREE.Color && newValue instanceof THREE.Color ) {

				currentValue.copy( newValue );

			} else if ( currentValue instanceof THREE.Color && typeof( newValue ) === "number" ) {

				currentValue.setHex( newValue );

			} else if ( currentValue instanceof THREE.Vector3 && newValue instanceof THREE.Vector3 ) {

				currentValue.copy( newValue );

			} else {

				this[ key ] = newValue;

			}

		}

	}

};

THREE.Material.prototype.clone = function ( material ) {

	if ( material === undefined ) material = new THREE.Material();

	material.name = this.name;

	material.side = this.side;

	material.opacity = this.opacity;
	material.transparent = this.transparent;

	material.blending = this.blending;

	material.blendSrc = this.blendSrc;
	material.blendDst = this.blendDst;
	material.blendEquation = this.blendEquation;

	material.depthTest = this.depthTest;
	material.depthWrite = this.depthWrite;

	material.polygonOffset = this.polygonOffset;
	material.polygonOffsetFactor = this.polygonOffsetFactor;
	material.polygonOffsetUnits = this.polygonOffsetUnits;

	material.alphaTest = this.alphaTest;

	material.overdraw = this.overdraw;

	material.visible = this.visible;

	return material;

};

THREE.Material.prototype.deallocate = function () {

	var index = THREE.MaterialLibrary.indexOf( this );
	if ( index !== -1 ) THREE.MaterialLibrary.splice( index, 1 );

};

THREE.MaterialIdCount = 0;
THREE.MaterialLibrary = [];
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  color: <hex>,
 *  opacity: <float>,
 *
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,
 *
 *  linewidth: <float>,
 *  linecap: "round",
 *  linejoin: "round",
 *
 *  vertexColors: <bool>
 *
 *  fog: <bool>
 * }
 */

THREE.LineBasicMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.color = new THREE.Color( 0xffffff );

	this.linewidth = 1;
	this.linecap = 'round';
	this.linejoin = 'round';

	this.vertexColors = false;

	this.fog = true;

	this.setValues( parameters );

};

THREE.LineBasicMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.LineBasicMaterial.prototype.clone = function () {

	var material = new THREE.LineBasicMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.color.copy( this.color );

	material.linewidth = this.linewidth;
	material.linecap = this.linecap;
	material.linejoin = this.linejoin;

	material.vertexColors = this.vertexColors;

	material.fog = this.fog;

	return material;

};
/**
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  color: <hex>,
 *  opacity: <float>,
 *
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,
 *
 *  linewidth: <float>,
 *
 *  scale: <float>,
 *  dashSize: <float>,
 *  gapSize: <float>,
 *
 *  vertexColors: <bool>
 *
 *  fog: <bool>
 * }
 */

THREE.LineDashedMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.color = new THREE.Color( 0xffffff );

	this.linewidth = 1;

	this.scale = 1;
	this.dashSize = 3;
	this.gapSize = 1;

	this.vertexColors = false;

	this.fog = true;

	this.setValues( parameters );

};

THREE.LineDashedMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.LineDashedMaterial.prototype.clone = function () {

	var material = new THREE.LineDashedMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.color.copy( this.color );

	material.linewidth = this.linewidth;

	material.scale = this.scale;
	material.dashSize = this.dashSize;
	material.gapSize = this.gapSize;

	material.vertexColors = this.vertexColors;

	material.fog = this.fog;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  color: <hex>,
 *  opacity: <float>,
 *  map: new THREE.Texture( <Image> ),
 *
 *  lightMap: new THREE.Texture( <Image> ),
 *
 *  specularMap: new THREE.Texture( <Image> ),
 *
 *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
 *  combine: THREE.Multiply,
 *  reflectivity: <float>,
 *  refractionRatio: <float>,
 *
 *  shading: THREE.SmoothShading,
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,
 *
 *  wireframe: <boolean>,
 *  wireframeLinewidth: <float>,
 *
 *  vertexColors: THREE.NoColors / THREE.VertexColors / THREE.FaceColors,
 *
 *  skinning: <bool>,
 *  morphTargets: <bool>,
 *
 *  fog: <bool>
 * }
 */

THREE.MeshBasicMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.color = new THREE.Color( 0xffffff ); // emissive

	this.map = null;

	this.lightMap = null;

	this.specularMap = null;

	this.envMap = null;
	this.combine = THREE.MultiplyOperation;
	this.reflectivity = 1;
	this.refractionRatio = 0.98;

	this.fog = true;

	this.shading = THREE.SmoothShading;

	this.wireframe = false;
	this.wireframeLinewidth = 1;
	this.wireframeLinecap = 'round';
	this.wireframeLinejoin = 'round';

	this.vertexColors = THREE.NoColors;

	this.skinning = false;
	this.morphTargets = false;

	this.setValues( parameters );

};

THREE.MeshBasicMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.MeshBasicMaterial.prototype.clone = function () {

	var material = new THREE.MeshBasicMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.color.copy( this.color );

	material.map = this.map;

	material.lightMap = this.lightMap;

	material.specularMap = this.specularMap;

	material.envMap = this.envMap;
	material.combine = this.combine;
	material.reflectivity = this.reflectivity;
	material.refractionRatio = this.refractionRatio;

	material.fog = this.fog;

	material.shading = this.shading;

	material.wireframe = this.wireframe;
	material.wireframeLinewidth = this.wireframeLinewidth;
	material.wireframeLinecap = this.wireframeLinecap;
	material.wireframeLinejoin = this.wireframeLinejoin;

	material.vertexColors = this.vertexColors;

	material.skinning = this.skinning;
	material.morphTargets = this.morphTargets;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  color: <hex>,
 *  ambient: <hex>,
 *  emissive: <hex>,
 *  opacity: <float>,
 *
 *  map: new THREE.Texture( <Image> ),
 *
 *  lightMap: new THREE.Texture( <Image> ),
 *
 *  specularMap: new THREE.Texture( <Image> ),
 *
 *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
 *  combine: THREE.Multiply,
 *  reflectivity: <float>,
 *  refractionRatio: <float>,
 *
 *  shading: THREE.SmoothShading,
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,
 *
 *  wireframe: <boolean>,
 *  wireframeLinewidth: <float>,
 *
 *  vertexColors: THREE.NoColors / THREE.VertexColors / THREE.FaceColors,
 *
 *  skinning: <bool>,
 *  morphTargets: <bool>,
 *  morphNormals: <bool>,
 *
 *	fog: <bool>
 * }
 */

THREE.MeshLambertMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.color = new THREE.Color( 0xffffff ); // diffuse
	this.ambient = new THREE.Color( 0xffffff );
	this.emissive = new THREE.Color( 0x000000 );

	this.wrapAround = false;
	this.wrapRGB = new THREE.Vector3( 1, 1, 1 );

	this.map = null;

	this.lightMap = null;

	this.specularMap = null;

	this.envMap = null;
	this.combine = THREE.MultiplyOperation;
	this.reflectivity = 1;
	this.refractionRatio = 0.98;

	this.fog = true;

	this.shading = THREE.SmoothShading;

	this.wireframe = false;
	this.wireframeLinewidth = 1;
	this.wireframeLinecap = 'round';
	this.wireframeLinejoin = 'round';

	this.vertexColors = THREE.NoColors;

	this.skinning = false;
	this.morphTargets = false;
	this.morphNormals = false;

	this.setValues( parameters );

};

THREE.MeshLambertMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.MeshLambertMaterial.prototype.clone = function () {

	var material = new THREE.MeshLambertMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.color.copy( this.color );
	material.ambient.copy( this.ambient );
	material.emissive.copy( this.emissive );

	material.wrapAround = this.wrapAround;
	material.wrapRGB.copy( this.wrapRGB );

	material.map = this.map;

	material.lightMap = this.lightMap;

	material.specularMap = this.specularMap;

	material.envMap = this.envMap;
	material.combine = this.combine;
	material.reflectivity = this.reflectivity;
	material.refractionRatio = this.refractionRatio;

	material.fog = this.fog;

	material.shading = this.shading;

	material.wireframe = this.wireframe;
	material.wireframeLinewidth = this.wireframeLinewidth;
	material.wireframeLinecap = this.wireframeLinecap;
	material.wireframeLinejoin = this.wireframeLinejoin;

	material.vertexColors = this.vertexColors;

	material.skinning = this.skinning;
	material.morphTargets = this.morphTargets;
	material.morphNormals = this.morphNormals;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  color: <hex>,
 *  ambient: <hex>,
 *  emissive: <hex>,
 *  specular: <hex>,
 *  shininess: <float>,
 *  opacity: <float>,
 *
 *  map: new THREE.Texture( <Image> ),
 *
 *  lightMap: new THREE.Texture( <Image> ),
 *
 *  bumpMap: new THREE.Texture( <Image> ),
 *  bumpScale: <float>,
 *
 *  normalMap: new THREE.Texture( <Image> ),
 *  normalScale: <Vector2>,
 *
 *  specularMap: new THREE.Texture( <Image> ),
 *
 *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
 *  combine: THREE.Multiply,
 *  reflectivity: <float>,
 *  refractionRatio: <float>,
 *
 *  shading: THREE.SmoothShading,
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,
 *
 *  wireframe: <boolean>,
 *  wireframeLinewidth: <float>,
 *
 *  vertexColors: THREE.NoColors / THREE.VertexColors / THREE.FaceColors,
 *
 *  skinning: <bool>,
 *  morphTargets: <bool>,
 *  morphNormals: <bool>,
 *
 *	fog: <bool>
 * }
 */

THREE.MeshPhongMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.color = new THREE.Color( 0xffffff ); // diffuse
	this.ambient = new THREE.Color( 0xffffff );
	this.emissive = new THREE.Color( 0x000000 );
	this.specular = new THREE.Color( 0x111111 );
	this.shininess = 30;

	this.metal = false;
	this.perPixel = true;

	this.wrapAround = false;
	this.wrapRGB = new THREE.Vector3( 1, 1, 1 );

	this.map = null;

	this.lightMap = null;

	this.bumpMap = null;
	this.bumpScale = 1;

	this.normalMap = null;
	this.normalScale = new THREE.Vector2( 1, 1 );

	this.specularMap = null;

	this.envMap = null;
	this.combine = THREE.MultiplyOperation;
	this.reflectivity = 1;
	this.refractionRatio = 0.98;

	this.fog = true;

	this.shading = THREE.SmoothShading;

	this.wireframe = false;
	this.wireframeLinewidth = 1;
	this.wireframeLinecap = 'round';
	this.wireframeLinejoin = 'round';

	this.vertexColors = THREE.NoColors;

	this.skinning = false;
	this.morphTargets = false;
	this.morphNormals = false;

	this.setValues( parameters );

};

THREE.MeshPhongMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.MeshPhongMaterial.prototype.clone = function () {

	var material = new THREE.MeshPhongMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.color.copy( this.color );
	material.ambient.copy( this.ambient );
	material.emissive.copy( this.emissive );
	material.specular.copy( this.specular );
	material.shininess = this.shininess;

	material.metal = this.metal;
	material.perPixel = this.perPixel;

	material.wrapAround = this.wrapAround;
	material.wrapRGB.copy( this.wrapRGB );

	material.map = this.map;

	material.lightMap = this.lightMap;

	material.bumpMap = this.bumpMap;
	material.bumpScale = this.bumpScale;

	material.normalMap = this.normalMap;
	material.normalScale.copy( this.normalScale );

	material.specularMap = this.specularMap;

	material.envMap = this.envMap;
	material.combine = this.combine;
	material.reflectivity = this.reflectivity;
	material.refractionRatio = this.refractionRatio;

	material.fog = this.fog;

	material.shading = this.shading;

	material.wireframe = this.wireframe;
	material.wireframeLinewidth = this.wireframeLinewidth;
	material.wireframeLinecap = this.wireframeLinecap;
	material.wireframeLinejoin = this.wireframeLinejoin;

	material.vertexColors = this.vertexColors;

	material.skinning = this.skinning;
	material.morphTargets = this.morphTargets;
	material.morphNormals = this.morphNormals;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  opacity: <float>,

 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,

 *  wireframe: <boolean>,
 *  wireframeLinewidth: <float>
 * }
 */

THREE.MeshDepthMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.wireframe = false;
	this.wireframeLinewidth = 1;

	this.setValues( parameters );

};

THREE.MeshDepthMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.MeshDepthMaterial.prototype.clone = function () {

	var material = new THREE.LineBasicMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.wireframe = this.wireframe;
	material.wireframeLinewidth = this.wireframeLinewidth;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 *
 * parameters = {
 *  opacity: <float>,

 *  shading: THREE.FlatShading,
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,

 *  wireframe: <boolean>,
 *  wireframeLinewidth: <float>
 * }
 */

THREE.MeshNormalMaterial = function ( parameters ) {

	THREE.Material.call( this, parameters );

	this.shading = THREE.FlatShading;

	this.wireframe = false;
	this.wireframeLinewidth = 1;

	this.setValues( parameters );

};

THREE.MeshNormalMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.MeshNormalMaterial.prototype.clone = function () {

	var material = new THREE.MeshNormalMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.shading = this.shading;

	material.wireframe = this.wireframe;
	material.wireframeLinewidth = this.wireframeLinewidth;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.MeshFaceMaterial = function ( materials ) {

	this.materials = materials instanceof Array ? materials : [];

};

THREE.MeshFaceMaterial.prototype.clone = function () {

	return new THREE.MeshFaceMaterial( this.materials.slice( 0 ) );

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  color: <hex>,
 *  opacity: <float>,
 *  map: new THREE.Texture( <Image> ),
 *
 *  size: <float>,
 *
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,
 *
 *  vertexColors: <bool>,
 *
 *  fog: <bool>
 * }
 */

THREE.ParticleBasicMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.color = new THREE.Color( 0xffffff );

	this.map = null;

	this.size = 1;
	this.sizeAttenuation = true;

	this.vertexColors = false;

	this.fog = true;

	this.setValues( parameters );

};

THREE.ParticleBasicMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.ParticleBasicMaterial.prototype.clone = function () {

	var material = new THREE.ParticleBasicMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.color.copy( this.color );

	material.map = this.map;

	material.size = this.size;
	material.sizeAttenuation = this.sizeAttenuation;

	material.vertexColors = this.vertexColors;

	material.fog = this.fog;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 *
 * parameters = {
 *  color: <hex>,
 *  program: <function>,
 *  opacity: <float>,
 *  blending: THREE.NormalBlending
 * }
 */

THREE.ParticleCanvasMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.color = new THREE.Color( 0xffffff );
	this.program = function ( context, color ) {};

	this.setValues( parameters );

};

THREE.ParticleCanvasMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.ParticleCanvasMaterial.prototype.clone = function () {

	var material = new THREE.ParticleCanvasMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.color.copy( this.color );
	material.program = this.program;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.ParticleDOMMaterial = function ( element ) {

	this.element = element;

};

THREE.ParticleDOMMaterial.prototype.clone = function(){

	return new THREE.ParticleDOMMaterial( this.element );

};
/**
 * @author alteredq / http://alteredqualia.com/
 *
 * parameters = {
 *  fragmentShader: <string>,
 *  vertexShader: <string>,
 *
 *  uniforms: { "parameter1": { type: "f", value: 1.0 }, "parameter2": { type: "i" value2: 2 } },
 *
 *  defines: { "label" : "value" },
 *
 *  shading: THREE.SmoothShading,
 *  blending: THREE.NormalBlending,
 *  depthTest: <bool>,
 *
 *  wireframe: <boolean>,
 *  wireframeLinewidth: <float>,
 *
 *  lights: <bool>,
 *
 *  vertexColors: THREE.NoColors / THREE.VertexColors / THREE.FaceColors,
 *
 *  skinning: <bool>,
 *  morphTargets: <bool>,
 *  morphNormals: <bool>,
 *
 *	fog: <bool>
 * }
 */

THREE.ShaderMaterial = function ( parameters ) {

	THREE.Material.call( this );

	this.fragmentShader = "void main() {}";
	this.vertexShader = "void main() {}";
	this.uniforms = {};
	this.defines = {};
	this.attributes = null;

	this.shading = THREE.SmoothShading;

	this.wireframe = false;
	this.wireframeLinewidth = 1;

	this.fog = false; // set to use scene fog

	this.lights = false; // set to use scene lights

	this.vertexColors = THREE.NoColors; // set to use "color" attribute stream

	this.skinning = false; // set to use skinning attribute streams

	this.morphTargets = false; // set to use morph targets
	this.morphNormals = false; // set to use morph normals

	this.setValues( parameters );

};

THREE.ShaderMaterial.prototype = Object.create( THREE.Material.prototype );

THREE.ShaderMaterial.prototype.clone = function () {

	var material = new THREE.ShaderMaterial();

	THREE.Material.prototype.clone.call( this, material );

	material.fragmentShader = this.fragmentShader;
	material.vertexShader = this.vertexShader;

	material.uniforms = THREE.UniformsUtils.clone( this.uniforms );

	material.attributes = this.attributes;
	material.defines = this.defines;

	material.shading = this.shading;

	material.wireframe = this.wireframe;
	material.wireframeLinewidth = this.wireframeLinewidth;

	material.fog = this.fog;

	material.lights = this.lights;

	material.vertexColors = this.vertexColors;

	material.skinning = this.skinning;

	material.morphTargets = this.morphTargets;
	material.morphNormals = this.morphNormals;

	return material;

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 * @author szimek / https://github.com/szimek/
 */

THREE.Texture = function ( image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {

	THREE.TextureLibrary.push( this );

	this.id = THREE.TextureIdCount ++;

	this.name = '';

	this.image = image;

	this.mapping = mapping !== undefined ? mapping : new THREE.UVMapping();

	this.wrapS = wrapS !== undefined ? wrapS : THREE.ClampToEdgeWrapping;
	this.wrapT = wrapT !== undefined ? wrapT : THREE.ClampToEdgeWrapping;

	this.magFilter = magFilter !== undefined ? magFilter : THREE.LinearFilter;
	this.minFilter = minFilter !== undefined ? minFilter : THREE.LinearMipMapLinearFilter;

	this.anisotropy = anisotropy !== undefined ? anisotropy : 1;

	this.format = format !== undefined ? format : THREE.RGBAFormat;
	this.type = type !== undefined ? type : THREE.UnsignedByteType;

	this.offset = new THREE.Vector2( 0, 0 );
	this.repeat = new THREE.Vector2( 1, 1 );

	this.generateMipmaps = true;
	this.premultiplyAlpha = false;
	this.flipY = true;

	this.needsUpdate = false;
	this.onUpdate = null;

};

THREE.Texture.prototype = {

	constructor: THREE.Texture,

	clone: function () {

		var texture = new THREE.Texture();

		texture.image = this.image;

		texture.mapping = this.mapping;

		texture.wrapS = this.wrapS;
		texture.wrapT = this.wrapT;

		texture.magFilter = this.magFilter;
		texture.minFilter = this.minFilter;

		texture.anisotropy = this.anisotropy;

		texture.format = this.format;
		texture.type = this.type;

		texture.offset.copy( this.offset );
		texture.repeat.copy( this.repeat );

		texture.generateMipmaps = this.generateMipmaps;
		texture.premultiplyAlpha = this.premultiplyAlpha;
		texture.flipY = this.flipY;

		return texture;

	},

	deallocate: function () {

		var index = THREE.TextureLibrary.indexOf( this );
		if ( index !== -1 ) THREE.TextureLibrary.splice( index, 1 );

	}

};

THREE.TextureIdCount = 0;
THREE.TextureLibrary = [];
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.CompressedTexture = function ( mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter ) {

	THREE.Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type );

	this.image = { width: width, height: height };
	this.mipmaps = mipmaps;

};

THREE.CompressedTexture.prototype = Object.create( THREE.Texture.prototype );

THREE.CompressedTexture.prototype.clone = function () {

	var texture = new THREE.CompressedTexture();

	texture.image = this.image;
	texture.mipmaps = this.mipmaps;

	texture.format = this.format;
	texture.type = this.type;

	texture.mapping = this.mapping;

	texture.wrapS = this.wrapS;
	texture.wrapT = this.wrapT;

	texture.magFilter = this.magFilter;
	texture.minFilter = this.minFilter;

	texture.anisotropy = this.anisotropy;

	texture.offset.copy( this.offset );
	texture.repeat.copy( this.repeat );

	return texture;

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.DataTexture = function ( data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter ) {

	THREE.Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type );

	this.image = { data: data, width: width, height: height };

};

THREE.DataTexture.prototype = Object.create( THREE.Texture.prototype );

THREE.DataTexture.prototype.clone = function () {

	var clonedTexture = new THREE.DataTexture( this.image.data,  this.image.width, this.image.height, this.format, this.type, this.mapping, this.wrapS, this.wrapT, this.magFilter, this.minFilter );

	clonedTexture.offset.copy( this.offset );
	clonedTexture.repeat.copy( this.repeat );

	return clonedTexture;

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.Particle = function ( material ) {

	THREE.Object3D.call( this );

	this.material = material;

};

THREE.Particle.prototype = Object.create( THREE.Object3D.prototype );

THREE.Particle.prototype.clone = function ( object ) {

	if ( object === undefined ) object = new THREE.Particle( this.material );

	THREE.Object3D.prototype.clone.call( this, object );

	return object;

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.ParticleSystem = function ( geometry, material ) {

	THREE.Object3D.call( this );

	this.geometry = geometry;
	this.material = ( material !== undefined ) ? material : new THREE.ParticleBasicMaterial( { color: Math.random() * 0xffffff } );

	this.sortParticles = false;

	if ( this.geometry ) {

		// calc bound radius

		if( this.geometry.boundingSphere === null ) {

			this.geometry.computeBoundingSphere();

		}

		this.boundRadius = geometry.boundingSphere.radius;

	}

	this.frustumCulled = false;

};

THREE.ParticleSystem.prototype = Object.create( THREE.Object3D.prototype );

THREE.ParticleSystem.prototype.clone = function ( object ) {

	if ( object === undefined ) object = new THREE.ParticleSystem( this.geometry, this.material );
	object.sortParticles = this.sortParticles;

	THREE.Object3D.prototype.clone.call( this, object );

	return object;

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.Line = function ( geometry, material, type ) {

	THREE.Object3D.call( this );

	this.geometry = geometry;
	this.material = ( material !== undefined ) ? material : new THREE.LineBasicMaterial( { color: Math.random() * 0xffffff } );
	this.type = ( type !== undefined ) ? type : THREE.LineStrip;

	if ( this.geometry ) {

		if ( ! this.geometry.boundingSphere ) {

			this.geometry.computeBoundingSphere();

		}

	}

};

THREE.LineStrip = 0;
THREE.LinePieces = 1;

THREE.Line.prototype = Object.create( THREE.Object3D.prototype );

THREE.Line.prototype.clone = function ( object ) {

	if ( object === undefined ) object = new THREE.Line( this.geometry, this.material, this.type );

	THREE.Object3D.prototype.clone.call( this, object );

	return object;

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 * @author mikael emtinger / http://gomo.se/
 */

THREE.Mesh = function ( geometry, material ) {

	THREE.Object3D.call( this );

	this.geometry = geometry;
	this.material = ( material !== undefined ) ? material : new THREE.MeshBasicMaterial( { color: Math.random() * 0xffffff, wireframe: true } );

	if ( this.geometry ) {

		// calc bound radius

		if ( this.geometry.boundingSphere === null ) {

			this.geometry.computeBoundingSphere();

		}

		this.boundRadius = geometry.boundingSphere.radius;


		// setup morph targets

		if ( this.geometry.morphTargets.length ) {

			this.morphTargetBase = -1;
			this.morphTargetForcedOrder = [];
			this.morphTargetInfluences = [];
			this.morphTargetDictionary = {};

			for( var m = 0; m < this.geometry.morphTargets.length; m ++ ) {

				this.morphTargetInfluences.push( 0 );
				this.morphTargetDictionary[ this.geometry.morphTargets[ m ].name ] = m;

			}

		}

	}

}

THREE.Mesh.prototype = Object.create( THREE.Object3D.prototype );

THREE.Mesh.prototype.getMorphTargetIndexByName = function ( name ) {

	if ( this.morphTargetDictionary[ name ] !== undefined ) {

		return this.morphTargetDictionary[ name ];

	}

	console.log( "THREE.Mesh.getMorphTargetIndexByName: morph target " + name + " does not exist. Returning 0." );

	return 0;

};

THREE.Mesh.prototype.clone = function ( object ) {

	if ( object === undefined ) object = new THREE.Mesh( this.geometry, this.material );

	THREE.Object3D.prototype.clone.call( this, object );

	return object;

};
/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Bone = function( belongsToSkin ) {

	THREE.Object3D.call( this );

	this.skin = belongsToSkin;
	this.skinMatrix = new THREE.Matrix4();

};

THREE.Bone.prototype = Object.create( THREE.Object3D.prototype );

THREE.Bone.prototype.update = function( parentSkinMatrix, forceUpdate ) {

	// update local

	if ( this.matrixAutoUpdate ) {

		forceUpdate |= this.updateMatrix();

	}

	// update skin matrix

	if ( forceUpdate || this.matrixWorldNeedsUpdate ) {

		if( parentSkinMatrix ) {

			this.skinMatrix.multiply( parentSkinMatrix, this.matrix );

		} else {

			this.skinMatrix.copy( this.matrix );

		}

		this.matrixWorldNeedsUpdate = false;
		forceUpdate = true;

	}

	// update children

	var child, i, l = this.children.length;

	for ( i = 0; i < l; i ++ ) {

		this.children[ i ].update( this.skinMatrix, forceUpdate );

	}

};

/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.SkinnedMesh = function ( geometry, material, useVertexTexture ) {

	THREE.Mesh.call( this, geometry, material );

	//

	this.useVertexTexture = useVertexTexture !== undefined ? useVertexTexture : true;

	// init bones

	this.identityMatrix = new THREE.Matrix4();

	this.bones = [];
	this.boneMatrices = [];

	var b, bone, gbone, p, q, s;

	if ( this.geometry && this.geometry.bones !== undefined ) {

		for ( b = 0; b < this.geometry.bones.length; b ++ ) {

			gbone = this.geometry.bones[ b ];

			p = gbone.pos;
			q = gbone.rotq;
			s = gbone.scl;

			bone = this.addBone();

			bone.name = gbone.name;
			bone.position.set( p[0], p[1], p[2] );
			bone.quaternion.set( q[0], q[1], q[2], q[3] );
			bone.useQuaternion = true;

			if ( s !== undefined ) {

				bone.scale.set( s[0], s[1], s[2] );

			} else {

				bone.scale.set( 1, 1, 1 );

			}

		}

		for ( b = 0; b < this.bones.length; b ++ ) {

			gbone = this.geometry.bones[ b ];
			bone = this.bones[ b ];

			if ( gbone.parent === -1 ) {

				this.add( bone );

			} else {

				this.bones[ gbone.parent ].add( bone );

			}

		}

		//

		var nBones = this.bones.length;

		if ( this.useVertexTexture ) {

			// layout (1 matrix = 4 pixels)
			//	RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)
			//  with  8x8  pixel texture max   16 bones  (8 * 8  / 4)
			//  	 16x16 pixel texture max   64 bones (16 * 16 / 4)
			//  	 32x32 pixel texture max  256 bones (32 * 32 / 4)
			//  	 64x64 pixel texture max 1024 bones (64 * 64 / 4)

			var size;

			if ( nBones > 256 )
				size = 64;
			else if ( nBones > 64 )
				size = 32;
			else if ( nBones > 16 )
				size = 16;
			else
				size = 8;

			this.boneTextureWidth = size;
			this.boneTextureHeight = size;

			this.boneMatrices = new Float32Array( this.boneTextureWidth * this.boneTextureHeight * 4 ); // 4 floats per RGBA pixel
			this.boneTexture = new THREE.DataTexture( this.boneMatrices, this.boneTextureWidth, this.boneTextureHeight, THREE.RGBAFormat, THREE.FloatType );
			this.boneTexture.minFilter = THREE.NearestFilter;
			this.boneTexture.magFilter = THREE.NearestFilter;
			this.boneTexture.generateMipmaps = false;
			this.boneTexture.flipY = false;

		} else {

			this.boneMatrices = new Float32Array( 16 * nBones );

		}

		this.pose();

	}

};

THREE.SkinnedMesh.prototype = Object.create( THREE.Mesh.prototype );

THREE.SkinnedMesh.prototype.addBone = function( bone ) {

	if ( bone === undefined ) {

		bone = new THREE.Bone( this );

	}

	this.bones.push( bone );

	return bone;

};

THREE.SkinnedMesh.prototype.updateMatrixWorld = function ( force ) {

	this.matrixAutoUpdate && this.updateMatrix();

	// update matrixWorld

	if ( this.matrixWorldNeedsUpdate || force ) {

		if ( this.parent ) {

			this.matrixWorld.multiply( this.parent.matrixWorld, this.matrix );

		} else {

			this.matrixWorld.copy( this.matrix );

		}

		this.matrixWorldNeedsUpdate = false;

		force = true;

	}

	// update children

	for ( var i = 0, l = this.children.length; i < l; i ++ ) {

		var child = this.children[ i ];

		if ( child instanceof THREE.Bone ) {

			child.update( this.identityMatrix, false );

		} else {

			child.updateMatrixWorld( true );

		}

	}

	// make a snapshot of the bones' rest position

	if ( this.boneInverses == undefined ) {

		this.boneInverses = [];

		for ( var b = 0, bl = this.bones.length; b < bl; b ++ ) {

			var inverse = new THREE.Matrix4();

			inverse.getInverse( this.bones[ b ].skinMatrix );

			this.boneInverses.push( inverse );

		}

	}

	// flatten bone matrices to array

	for ( var b = 0, bl = this.bones.length; b < bl; b ++ ) {

		// compute the offset between the current and the original transform;

		//TODO: we could get rid of this multiplication step if the skinMatrix
		// was already representing the offset; however, this requires some
		// major changes to the animation system

		THREE.SkinnedMesh.offsetMatrix.multiply( this.bones[ b ].skinMatrix, this.boneInverses[ b ] );

		THREE.SkinnedMesh.offsetMatrix.flattenToArrayOffset( this.boneMatrices, b * 16 );

	}

	if ( this.useVertexTexture ) {

		this.boneTexture.needsUpdate = true;

	}

};

THREE.SkinnedMesh.prototype.pose = function() {

	this.updateMatrixWorld( true );

	for ( var i = 0; i < this.geometry.skinIndices.length; i ++ ) {

		// normalize weights

		var sw = this.geometry.skinWeights[ i ];

		var scale = 1.0 / sw.lengthManhattan();

		if ( scale !== Infinity ) {

			sw.multiplyScalar( scale );

		} else {

			sw.set( 1 ); // this will be normalized by the shader anyway

		}

	}

};

THREE.SkinnedMesh.prototype.clone = function ( object ) {

	if ( object === undefined ) object = new THREE.SkinnedMesh( this.geometry, this.material, this.useVertexTexture );

	THREE.Mesh.prototype.clone.call( this, object );

	return object;

};

THREE.SkinnedMesh.offsetMatrix = new THREE.Matrix4();
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.MorphAnimMesh = function ( geometry, material ) {

	THREE.Mesh.call( this, geometry, material );

	// API

	this.duration = 1000; // milliseconds
	this.mirroredLoop = false;
	this.time = 0;

	// internals

	this.lastKeyframe = 0;
	this.currentKeyframe = 0;

	this.direction = 1;
	this.directionBackwards = false;

	this.setFrameRange( 0, this.geometry.morphTargets.length - 1 );

};

THREE.MorphAnimMesh.prototype = Object.create( THREE.Mesh.prototype );

THREE.MorphAnimMesh.prototype.setFrameRange = function ( start, end ) {

	this.startKeyframe = start;
	this.endKeyframe = end;

	this.length = this.endKeyframe - this.startKeyframe + 1;

};

THREE.MorphAnimMesh.prototype.setDirectionForward = function () {

	this.direction = 1;
	this.directionBackwards = false;

};

THREE.MorphAnimMesh.prototype.setDirectionBackward = function () {

	this.direction = -1;
	this.directionBackwards = true;

};

THREE.MorphAnimMesh.prototype.parseAnimations = function () {

	var geometry = this.geometry;

	if ( ! geometry.animations ) geometry.animations = {};

	var firstAnimation, animations = geometry.animations;

	var pattern = /([a-z]+)(\d+)/;

	for ( var i = 0, il = geometry.morphTargets.length; i < il; i ++ ) {

		var morph = geometry.morphTargets[ i ];
		var parts = morph.name.match( pattern );

		if ( parts && parts.length > 1 ) {

			var label = parts[ 1 ];
			var num = parts[ 2 ];

			if ( ! animations[ label ] ) animations[ label ] = { start: Infinity, end: -Infinity };

			var animation = animations[ label ];

			if ( i < animation.start ) animation.start = i;
			if ( i > animation.end ) animation.end = i;

			if ( ! firstAnimation ) firstAnimation = label;

		}

	}

	geometry.firstAnimation = firstAnimation;

};

THREE.MorphAnimMesh.prototype.setAnimationLabel = function ( label, start, end ) {

	if ( ! this.geometry.animations ) this.geometry.animations = {};

	this.geometry.animations[ label ] = { start: start, end: end };

};

THREE.MorphAnimMesh.prototype.playAnimation = function ( label, fps ) {

	var animation = this.geometry.animations[ label ];

	if ( animation ) {

		this.setFrameRange( animation.start, animation.end );
		this.duration = 1000 * ( ( animation.end - animation.start ) / fps );
		this.time = 0;

	} else {

		console.warn( "animation[" + label + "] undefined" );

	}

};

THREE.MorphAnimMesh.prototype.updateAnimation = function ( delta ) {

	var frameTime = this.duration / this.length;

	this.time += this.direction * delta;

	if ( this.mirroredLoop ) {

		if ( this.time > this.duration || this.time < 0 ) {

			this.direction *= -1;

			if ( this.time > this.duration ) {

				this.time = this.duration;
				this.directionBackwards = true;

			}

			if ( this.time < 0 ) {

				this.time = 0;
				this.directionBackwards = false;

			}

		}

	} else {

		this.time = this.time % this.duration;

		if ( this.time < 0 ) this.time += this.duration;

	}

	var keyframe = this.startKeyframe + THREE.Math.clamp( Math.floor( this.time / frameTime ), 0, this.length - 1 );

	if ( keyframe !== this.currentKeyframe ) {

		this.morphTargetInfluences[ this.lastKeyframe ] = 0;
		this.morphTargetInfluences[ this.currentKeyframe ] = 1;

		this.morphTargetInfluences[ keyframe ] = 0;

		this.lastKeyframe = this.currentKeyframe;
		this.currentKeyframe = keyframe;

	}

	var mix = ( this.time % frameTime ) / frameTime;

	if ( this.directionBackwards ) {

		mix = 1 - mix;

	}

	this.morphTargetInfluences[ this.currentKeyframe ] = mix;
	this.morphTargetInfluences[ this.lastKeyframe ] = 1 - mix;

};

THREE.MorphAnimMesh.prototype.clone = function ( object ) {

	if ( object === undefined ) object = new THREE.MorphAnimMesh( this.geometry, this.material );

	object.duration = this.duration;
	object.mirroredLoop = this.mirroredLoop;
	object.time = this.time;

	object.lastKeyframe = this.lastKeyframe;
	object.currentKeyframe = this.currentKeyframe;

	object.direction = this.direction;
	object.directionBackwards = this.directionBackwards;

	THREE.Mesh.prototype.clone.call( this, object );

	return object;

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Ribbon = function ( geometry, material ) {

	THREE.Object3D.call( this );

	this.geometry = geometry;
	this.material = material;

};

THREE.Ribbon.prototype = Object.create( THREE.Object3D.prototype );

THREE.Ribbon.prototype.clone = function ( object ) {

	if ( object === undefined ) object = new THREE.Ribbon( this.geometry, this.material );

	THREE.Object3D.prototype.clone.call( this, object );

	return object;

};
/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 * @author mrdoob / http://mrdoob.com/
 */

THREE.LOD = function () {

	THREE.Object3D.call( this );

	this.LODs = [];

};


THREE.LOD.prototype = Object.create( THREE.Object3D.prototype );

THREE.LOD.prototype.addLevel = function ( object3D, visibleAtDistance ) {

	if ( visibleAtDistance === undefined ) {

		visibleAtDistance = 0;

	}

	visibleAtDistance = Math.abs( visibleAtDistance );

	for ( var l = 0; l < this.LODs.length; l ++ ) {

		if ( visibleAtDistance < this.LODs[ l ].visibleAtDistance ) {

			break;

		}

	}

	this.LODs.splice( l, 0, { visibleAtDistance: visibleAtDistance, object3D: object3D } );
	this.add( object3D );

};

THREE.LOD.prototype.update = function ( camera ) {

	if ( this.LODs.length > 1 ) {

		camera.matrixWorldInverse.getInverse( camera.matrixWorld );

		var inverse  = camera.matrixWorldInverse;
		var distance = -( inverse.elements[2] * this.matrixWorld.elements[12] + inverse.elements[6] * this.matrixWorld.elements[13] + inverse.elements[10] * this.matrixWorld.elements[14] + inverse.elements[14] );

		this.LODs[ 0 ].object3D.visible = true;

		for ( var l = 1; l < this.LODs.length; l ++ ) {

			if( distance >= this.LODs[ l ].visibleAtDistance ) {

				this.LODs[ l - 1 ].object3D.visible = false;
				this.LODs[ l     ].object3D.visible = true;

			} else {

				break;

			}

		}

		for( ; l < this.LODs.length; l ++ ) {

			this.LODs[ l ].object3D.visible = false;

		}

	}

};

THREE.LOD.prototype.clone = function () {

	// TODO

};
/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Sprite = function ( parameters ) {

	THREE.Object3D.call( this );

	parameters = parameters || {};

	this.color = ( parameters.color !== undefined ) ? new THREE.Color( parameters.color ) : new THREE.Color( 0xffffff );
	this.map = ( parameters.map !== undefined ) ? parameters.map : new THREE.Texture();

	this.blending = ( parameters.blending !== undefined ) ? parameters.blending : THREE.NormalBlending;

	this.blendSrc = parameters.blendSrc !== undefined ? parameters.blendSrc : THREE.SrcAlphaFactor;
	this.blendDst = parameters.blendDst !== undefined ? parameters.blendDst : THREE.OneMinusSrcAlphaFactor;
	this.blendEquation = parameters.blendEquation !== undefined ? parameters.blendEquation : THREE.AddEquation;

	this.useScreenCoordinates = ( parameters.useScreenCoordinates !== undefined ) ? parameters.useScreenCoordinates : true;
	this.mergeWith3D = ( parameters.mergeWith3D !== undefined ) ? parameters.mergeWith3D : !this.useScreenCoordinates;
	this.affectedByDistance = ( parameters.affectedByDistance !== undefined ) ? parameters.affectedByDistance : !this.useScreenCoordinates;
	this.scaleByViewport = ( parameters.scaleByViewport !== undefined ) ? parameters.scaleByViewport : !this.affectedByDistance;
	this.alignment = ( parameters.alignment instanceof THREE.Vector2 ) ? parameters.alignment : THREE.SpriteAlignment.center.clone();

	this.fog = ( parameters.fog !== undefined ) ? parameters.fog : false;

	this.rotation3d = this.rotation;
	this.rotation = 0;
	this.opacity = 1;

	this.uvOffset = new THREE.Vector2( 0, 0 );
	this.uvScale  = new THREE.Vector2( 1, 1 );

};

THREE.Sprite.prototype = Object.create( THREE.Object3D.prototype );

/*
 * Custom update matrix
 */

THREE.Sprite.prototype.updateMatrix = function () {

	this.matrix.setPosition( this.position );

	this.rotation3d.set( 0, 0, this.rotation );
	this.matrix.setRotationFromEuler( this.rotation3d );

	if ( this.scale.x !== 1 || this.scale.y !== 1 ) {

		this.matrix.scale( this.scale );
		this.boundRadiusScale = Math.max( this.scale.x, this.scale.y );

	}

	this.matrixWorldNeedsUpdate = true;

};

THREE.Sprite.prototype.clone = function ( object ) {

	if ( object === undefined ) object = new THREE.Sprite( {} );

	object.color.copy( this.color );
	object.map = this.map;
	object.blending = this.blending;

	object.useScreenCoordinates = this.useScreenCoordinates;
	object.mergeWith3D = this.mergeWith3D;
	object.affectedByDistance = this.affectedByDistance;
	object.scaleByViewport = this.scaleByViewport;
	object.alignment = this.alignment;

	object.fog = this.fog;

	object.rotation3d.copy( this.rotation3d );
	object.rotation = this.rotation;
	object.opacity = this.opacity;

	object.uvOffset.copy( this.uvOffset );
	object.uvScale.copy( this.uvScale);

	THREE.Object3D.prototype.clone.call( this, object );

	return object;

};

/*
 * Alignment
 */

THREE.SpriteAlignment = {};
THREE.SpriteAlignment.topLeft = new THREE.Vector2( 1, -1 );
THREE.SpriteAlignment.topCenter = new THREE.Vector2( 0, -1 );
THREE.SpriteAlignment.topRight = new THREE.Vector2( -1, -1 );
THREE.SpriteAlignment.centerLeft = new THREE.Vector2( 1, 0 );
THREE.SpriteAlignment.center = new THREE.Vector2( 0, 0 );
THREE.SpriteAlignment.centerRight = new THREE.Vector2( -1, 0 );
THREE.SpriteAlignment.bottomLeft = new THREE.Vector2( 1, 1 );
THREE.SpriteAlignment.bottomCenter = new THREE.Vector2( 0, 1 );
THREE.SpriteAlignment.bottomRight = new THREE.Vector2( -1, 1 );
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.Scene = function () {

	THREE.Object3D.call( this );

	this.fog = null;
	this.overrideMaterial = null;

	this.matrixAutoUpdate = false;

	this.__objects = [];
	this.__lights = [];

	this.__objectsAdded = [];
	this.__objectsRemoved = [];

};

THREE.Scene.prototype = Object.create( THREE.Object3D.prototype );

THREE.Scene.prototype.__addObject = function ( object ) {

	if ( object instanceof THREE.Light ) {

		if ( this.__lights.indexOf( object ) === - 1 ) {

			this.__lights.push( object );

		}

		if ( object.target && object.target.parent === undefined ) {

			this.add( object.target );

		}

	} else if ( !( object instanceof THREE.Camera || object instanceof THREE.Bone ) ) {

		if ( this.__objects.indexOf( object ) === - 1 ) {

			this.__objects.push( object );
			this.__objectsAdded.push( object );

			// check if previously removed

			var i = this.__objectsRemoved.indexOf( object );

			if ( i !== -1 ) {

				this.__objectsRemoved.splice( i, 1 );

			}

		}

	}

	for ( var c = 0; c < object.children.length; c ++ ) {

		this.__addObject( object.children[ c ] );

	}

};

THREE.Scene.prototype.__removeObject = function ( object ) {

	if ( object instanceof THREE.Light ) {

		var i = this.__lights.indexOf( object );

		if ( i !== -1 ) {

			this.__lights.splice( i, 1 );

		}

	} else if ( !( object instanceof THREE.Camera ) ) {

		var i = this.__objects.indexOf( object );

		if( i !== -1 ) {

			this.__objects.splice( i, 1 );
			this.__objectsRemoved.push( object );

			// check if previously added

			var ai = this.__objectsAdded.indexOf( object );

			if ( ai !== -1 ) {

				this.__objectsAdded.splice( ai, 1 );

			}

		}

	}

	for ( var c = 0; c < object.children.length; c ++ ) {

		this.__removeObject( object.children[ c ] );

	}

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Fog = function ( hex, near, far ) {

	this.name = '';

	this.color = new THREE.Color( hex );

	this.near = ( near !== undefined ) ? near : 1;
	this.far = ( far !== undefined ) ? far : 1000;

};

THREE.Fog.prototype.clone = function () {

	return new THREE.Fog( this.color.getHex(), this.near, this.far );

};
/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.FogExp2 = function ( hex, density ) {

	this.name = '';
	this.color = new THREE.Color( hex );
	this.density = ( density !== undefined ) ? density : 0.00025;

};

THREE.FogExp2.prototype.clone = function () {

	return new THREE.FogExp2( this.color.getHex(), this.density );

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.CanvasRenderer = function ( parameters ) {

	console.log( 'THREE.CanvasRenderer', THREE.REVISION );

	parameters = parameters || {};

	var _this = this,
	_renderData, _elements, _lights,
	_projector = new THREE.Projector(),

	_canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElement( 'canvas' ),

	_canvasWidth, _canvasHeight, _canvasWidthHalf, _canvasHeightHalf,
	_context = _canvas.getContext( '2d' ),

	_clearColor = new THREE.Color( 0x000000 ),
	_clearOpacity = 0,

	_contextGlobalAlpha = 1,
	_contextGlobalCompositeOperation = 0,
	_contextStrokeStyle = null,
	_contextFillStyle = null,
	_contextLineWidth = null,
	_contextLineCap = null,
	_contextLineJoin = null,

	_v1, _v2, _v3, _v4,
	_v5 = new THREE.RenderableVertex(),
	_v6 = new THREE.RenderableVertex(),

	_v1x, _v1y, _v2x, _v2y, _v3x, _v3y,
	_v4x, _v4y, _v5x, _v5y, _v6x, _v6y,

	_color = new THREE.Color(),
	_color1 = new THREE.Color(),
	_color2 = new THREE.Color(),
	_color3 = new THREE.Color(),
	_color4 = new THREE.Color(),

	_diffuseColor = new THREE.Color(),
	_emissiveColor = new THREE.Color(),

	_patterns = {}, _imagedatas = {},

	_near, _far,

	_image, _uvs,
	_uv1x, _uv1y, _uv2x, _uv2y, _uv3x, _uv3y,

	_clipRect = new THREE.Rectangle(),
	_clearRect = new THREE.Rectangle(),
	_bboxRect = new THREE.Rectangle(),

	_enableLighting = false,
	_ambientLight = new THREE.Color(),
	_directionalLights = new THREE.Color(),
	_pointLights = new THREE.Color(),

	_pi2 = Math.PI * 2,
	_vector3 = new THREE.Vector3(), // Needed for PointLight

	_pixelMap, _pixelMapContext, _pixelMapImage, _pixelMapData,
	_gradientMap, _gradientMapContext, _gradientMapQuality = 16;

	_pixelMap = document.createElement( 'canvas' );
	_pixelMap.width = _pixelMap.height = 2;

	_pixelMapContext = _pixelMap.getContext( '2d' );
	_pixelMapContext.fillStyle = 'rgba(0,0,0,1)';
	_pixelMapContext.fillRect( 0, 0, 2, 2 );

	_pixelMapImage = _pixelMapContext.getImageData( 0, 0, 2, 2 );
	_pixelMapData = _pixelMapImage.data;

	_gradientMap = document.createElement( 'canvas' );
	_gradientMap.width = _gradientMap.height = _gradientMapQuality;

	_gradientMapContext = _gradientMap.getContext( '2d' );
	_gradientMapContext.translate( - _gradientMapQuality / 2, - _gradientMapQuality / 2 );
	_gradientMapContext.scale( _gradientMapQuality, _gradientMapQuality );

	_gradientMapQuality --; // Fix UVs

	this.domElement = _canvas;

	this.autoClear = true;
	this.sortObjects = true;
	this.sortElements = true;

	this.info = {

		render: {

			vertices: 0,
			faces: 0

		}

	}

	this.setSize = function ( width, height ) {

		_canvasWidth = width;
		_canvasHeight = height;
		_canvasWidthHalf = Math.floor( _canvasWidth / 2 );
		_canvasHeightHalf = Math.floor( _canvasHeight / 2 );

		_canvas.width = _canvasWidth;
		_canvas.height = _canvasHeight;

		_clipRect.set( - _canvasWidthHalf, - _canvasHeightHalf, _canvasWidthHalf, _canvasHeightHalf );
		_clearRect.set( - _canvasWidthHalf, - _canvasHeightHalf, _canvasWidthHalf, _canvasHeightHalf );

		_contextGlobalAlpha = 1;
		_contextGlobalCompositeOperation = 0;
		_contextStrokeStyle = null;
		_contextFillStyle = null;
		_contextLineWidth = null;
		_contextLineCap = null;
		_contextLineJoin = null;

	};

	this.setClearColor = function ( color, opacity ) {

		_clearColor.copy( color );
		_clearOpacity = opacity !== undefined ? opacity : 1;

		_clearRect.set( - _canvasWidthHalf, - _canvasHeightHalf, _canvasWidthHalf, _canvasHeightHalf );

	};

	this.setClearColorHex = function ( hex, opacity ) {

		_clearColor.setHex( hex );
		_clearOpacity = opacity !== undefined ? opacity : 1;

		_clearRect.set( - _canvasWidthHalf, - _canvasHeightHalf, _canvasWidthHalf, _canvasHeightHalf );

	};

	this.getMaxAnisotropy  = function () {

		return 0;

	};

	this.clear = function () {

		_context.setTransform( 1, 0, 0, - 1, _canvasWidthHalf, _canvasHeightHalf );

		if ( _clearRect.isEmpty() === false ) {

			_clearRect.minSelf( _clipRect );
			_clearRect.inflate( 2 );

			if ( _clearOpacity < 1 ) {

				_context.clearRect( Math.floor( _clearRect.getX() ), Math.floor( _clearRect.getY() ), Math.floor( _clearRect.getWidth() ), Math.floor( _clearRect.getHeight() ) );

			}

			if ( _clearOpacity > 0 ) {

				setBlending( THREE.NormalBlending );
				setOpacity( 1 );

				setFillStyle( 'rgba(' + Math.floor( _clearColor.r * 255 ) + ',' + Math.floor( _clearColor.g * 255 ) + ',' + Math.floor( _clearColor.b * 255 ) + ',' + _clearOpacity + ')' );

				_context.fillRect( Math.floor( _clearRect.getX() ), Math.floor( _clearRect.getY() ), Math.floor( _clearRect.getWidth() ), Math.floor( _clearRect.getHeight() ) );

			}

			_clearRect.empty();

		}


	};

	this.render = function ( scene, camera ) {

		if ( camera instanceof THREE.Camera === false ) {

			console.error( 'THREE.CanvasRenderer.render: camera is not an instance of THREE.Camera.' );
			return;

		}

		var e, el, element, material;

		this.autoClear === true
			? this.clear()
			: _context.setTransform( 1, 0, 0, - 1, _canvasWidthHalf, _canvasHeightHalf );

		_this.info.render.vertices = 0;
		_this.info.render.faces = 0;

		_renderData = _projector.projectScene( scene, camera, this.sortObjects, this.sortElements );
		_elements = _renderData.elements;
		_lights = _renderData.lights;

		/* DEBUG
		_context.fillStyle = 'rgba( 0, 255, 255, 0.5 )';
		_context.fillRect( _clipRect.getX(), _clipRect.getY(), _clipRect.getWidth(), _clipRect.getHeight() );
		*/

		_enableLighting = _lights.length > 0;

		if ( _enableLighting === true ) {

			 calculateLights();

		}

		for ( e = 0, el = _elements.length; e < el; e++ ) {

			element = _elements[ e ];

			material = element.material;

			if ( material === undefined || material.visible === false ) continue;

			_bboxRect.empty();

			if ( element instanceof THREE.RenderableParticle ) {

				_v1 = element;
				_v1.x *= _canvasWidthHalf; _v1.y *= _canvasHeightHalf;

				renderParticle( _v1, element, material, scene );

			} else if ( element instanceof THREE.RenderableLine ) {

				_v1 = element.v1; _v2 = element.v2;

				_v1.positionScreen.x *= _canvasWidthHalf; _v1.positionScreen.y *= _canvasHeightHalf;
				_v2.positionScreen.x *= _canvasWidthHalf; _v2.positionScreen.y *= _canvasHeightHalf;

				_bboxRect.addPoint( _v1.positionScreen.x, _v1.positionScreen.y );
				_bboxRect.addPoint( _v2.positionScreen.x, _v2.positionScreen.y );

				if ( _clipRect.intersects( _bboxRect ) === true ) {

					renderLine( _v1, _v2, element, material, scene );

				}


			} else if ( element instanceof THREE.RenderableFace3 ) {

				_v1 = element.v1; _v2 = element.v2; _v3 = element.v3;

				_v1.positionScreen.x *= _canvasWidthHalf; _v1.positionScreen.y *= _canvasHeightHalf;
				_v2.positionScreen.x *= _canvasWidthHalf; _v2.positionScreen.y *= _canvasHeightHalf;
				_v3.positionScreen.x *= _canvasWidthHalf; _v3.positionScreen.y *= _canvasHeightHalf;

				if ( material.overdraw === true ) {

					expand( _v1.positionScreen, _v2.positionScreen );
					expand( _v2.positionScreen, _v3.positionScreen );
					expand( _v3.positionScreen, _v1.positionScreen );

				}

				_bboxRect.add3Points( _v1.positionScreen.x, _v1.positionScreen.y,
						      _v2.positionScreen.x, _v2.positionScreen.y,
						      _v3.positionScreen.x, _v3.positionScreen.y );

				if ( _clipRect.intersects( _bboxRect ) === true ) {

					renderFace3( _v1, _v2, _v3, 0, 1, 2, element, material, scene );

				}

			} else if ( element instanceof THREE.RenderableFace4 ) {

				_v1 = element.v1; _v2 = element.v2; _v3 = element.v3; _v4 = element.v4;

				_v1.positionScreen.x *= _canvasWidthHalf; _v1.positionScreen.y *= _canvasHeightHalf;
				_v2.positionScreen.x *= _canvasWidthHalf; _v2.positionScreen.y *= _canvasHeightHalf;
				_v3.positionScreen.x *= _canvasWidthHalf; _v3.positionScreen.y *= _canvasHeightHalf;
				_v4.positionScreen.x *= _canvasWidthHalf; _v4.positionScreen.y *= _canvasHeightHalf;

				_v5.positionScreen.copy( _v2.positionScreen );
				_v6.positionScreen.copy( _v4.positionScreen );

				if ( material.overdraw === true ) {

					expand( _v1.positionScreen, _v2.positionScreen );
					expand( _v2.positionScreen, _v4.positionScreen );
					expand( _v4.positionScreen, _v1.positionScreen );

					expand( _v3.positionScreen, _v5.positionScreen );
					expand( _v3.positionScreen, _v6.positionScreen );

				}

				_bboxRect.addPoint( _v1.positionScreen.x, _v1.positionScreen.y );
				_bboxRect.addPoint( _v2.positionScreen.x, _v2.positionScreen.y );
				_bboxRect.addPoint( _v3.positionScreen.x, _v3.positionScreen.y );
				_bboxRect.addPoint( _v4.positionScreen.x, _v4.positionScreen.y );

				if ( _clipRect.intersects( _bboxRect ) === true ) {

					renderFace4( _v1, _v2, _v3, _v4, _v5, _v6, element, material, scene );

				}

			}

			/* DEBUG
			_context.lineWidth = 1;
			_context.strokeStyle = 'rgba( 0, 255, 0, 0.5 )';
			_context.strokeRect( _bboxRect.getX(), _bboxRect.getY(), _bboxRect.getWidth(), _bboxRect.getHeight() );
			*/

			_clearRect.addRectangle( _bboxRect );


		}

		/* DEBUG
		_context.lineWidth = 1;
		_context.strokeStyle = 'rgba( 255, 0, 0, 0.5 )';
		_context.strokeRect( _clearRect.getX(), _clearRect.getY(), _clearRect.getWidth(), _clearRect.getHeight() );
		*/

		_context.setTransform( 1, 0, 0, 1, 0, 0 );

		//

		function calculateLights() {

			_ambientLight.setRGB( 0, 0, 0 );
			_directionalLights.setRGB( 0, 0, 0 );
			_pointLights.setRGB( 0, 0, 0 );

			for ( var l = 0, ll = _lights.length; l < ll; l ++ ) {

				var light = _lights[ l ];
				var lightColor = light.color;

				if ( light instanceof THREE.AmbientLight ) {

					_ambientLight.r += lightColor.r;
					_ambientLight.g += lightColor.g;
					_ambientLight.b += lightColor.b;

				} else if ( light instanceof THREE.DirectionalLight ) {

					// for particles

					_directionalLights.r += lightColor.r;
					_directionalLights.g += lightColor.g;
					_directionalLights.b += lightColor.b;

				} else if ( light instanceof THREE.PointLight ) {

					// for particles

					_pointLights.r += lightColor.r;
					_pointLights.g += lightColor.g;
					_pointLights.b += lightColor.b;

				}

			}

		}

		function calculateLight( position, normal, color ) {

			for ( var l = 0, ll = _lights.length; l < ll; l ++ ) {

				var light = _lights[ l ];
				var lightColor = light.color;

				if ( light instanceof THREE.DirectionalLight ) {

					var lightPosition = light.matrixWorld.getPosition().normalize();

					var amount = normal.dot( lightPosition );

					if ( amount <= 0 ) continue;

					amount *= light.intensity;

					color.r += lightColor.r * amount;
					color.g += lightColor.g * amount;
					color.b += lightColor.b * amount;

				} else if ( light instanceof THREE.PointLight ) {

					var lightPosition = light.matrixWorld.getPosition();

					var amount = normal.dot( _vector3.sub( lightPosition, position ).normalize() );

					if ( amount <= 0 ) continue;

					amount *= light.distance == 0 ? 1 : 1 - Math.min( position.distanceTo( lightPosition ) / light.distance, 1 );

					if ( amount == 0 ) continue;

					amount *= light.intensity;

					color.r += lightColor.r * amount;
					color.g += lightColor.g * amount;
					color.b += lightColor.b * amount;

				}

			}

		}

		function renderParticle( v1, element, material, scene ) {

			setOpacity( material.opacity );
			setBlending( material.blending );

			var width, height, scaleX, scaleY,
			bitmap, bitmapWidth, bitmapHeight;

			if ( material instanceof THREE.ParticleBasicMaterial ) {

				if ( material.map === null ) {

					scaleX = element.object.scale.x;
					scaleY = element.object.scale.y;

					// TODO: Be able to disable this

					scaleX *= element.scale.x * _canvasWidthHalf;
					scaleY *= element.scale.y * _canvasHeightHalf;

					_bboxRect.set( v1.x - scaleX, v1.y - scaleY, v1.x  + scaleX, v1.y + scaleY );

					if ( _clipRect.intersects( _bboxRect ) === false ) {

						return;

					}

					setFillStyle( material.color.getContextStyle() );

					_context.save();
					_context.translate( v1.x, v1.y );
					_context.rotate( - element.rotation );
					_context.scale( scaleX, scaleY );
					_context.fillRect( -1, -1, 2, 2 );
					_context.restore();

				} else {

					bitmap = material.map.image;
					bitmapWidth = bitmap.width >> 1;
					bitmapHeight = bitmap.height >> 1;

					scaleX = element.scale.x * _canvasWidthHalf;
					scaleY = element.scale.y * _canvasHeightHalf;

					width = scaleX * bitmapWidth;
					height = scaleY * bitmapHeight;

					// TODO: Rotations break this...

					_bboxRect.set( v1.x - width, v1.y - height, v1.x  + width, v1.y + height );

					if ( _clipRect.intersects( _bboxRect ) === false ) {

						return;

					}

					_context.save();
					_context.translate( v1.x, v1.y );
					_context.rotate( - element.rotation );
					_context.scale( scaleX, - scaleY );

					_context.translate( - bitmapWidth, - bitmapHeight );
					_context.drawImage( bitmap, 0, 0 );
					_context.restore();

				}

				/* DEBUG
				setStrokeStyle( 'rgb(255,255,0)' );
				_context.beginPath();
				_context.moveTo( v1.x - 10, v1.y );
				_context.lineTo( v1.x + 10, v1.y );
				_context.moveTo( v1.x, v1.y - 10 );
				_context.lineTo( v1.x, v1.y + 10 );
				_context.stroke();
				*/

			} else if ( material instanceof THREE.ParticleCanvasMaterial ) {

				width = element.scale.x * _canvasWidthHalf;
				height = element.scale.y * _canvasHeightHalf;

				_bboxRect.set( v1.x - width, v1.y - height, v1.x + width, v1.y + height );

				if ( _clipRect.intersects( _bboxRect ) === false ) {

					return;

				}

				setStrokeStyle( material.color.getContextStyle() );
				setFillStyle( material.color.getContextStyle() );

				_context.save();
				_context.translate( v1.x, v1.y );
				_context.rotate( - element.rotation );
				_context.scale( width, height );

				material.program( _context );

				_context.restore();

			}

		}

		function renderLine( v1, v2, element, material, scene ) {

			setOpacity( material.opacity );
			setBlending( material.blending );

			_context.beginPath();
			_context.moveTo( v1.positionScreen.x, v1.positionScreen.y );
			_context.lineTo( v2.positionScreen.x, v2.positionScreen.y );

			if ( material instanceof THREE.LineBasicMaterial ) {

				setLineWidth( material.linewidth );
				setLineCap( material.linecap );
				setLineJoin( material.linejoin );
				setStrokeStyle( material.color.getContextStyle() );

				_context.stroke();
				_bboxRect.inflate( material.linewidth * 2 );

			}

		}

		function renderFace3( v1, v2, v3, uv1, uv2, uv3, element, material, scene ) {

			_this.info.render.vertices += 3;
			_this.info.render.faces ++;

			setOpacity( material.opacity );
			setBlending( material.blending );

			_v1x = v1.positionScreen.x; _v1y = v1.positionScreen.y;
			_v2x = v2.positionScreen.x; _v2y = v2.positionScreen.y;
			_v3x = v3.positionScreen.x; _v3y = v3.positionScreen.y;

			drawTriangle( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y );

			if ( ( material instanceof THREE.MeshLambertMaterial || material instanceof THREE.MeshPhongMaterial ) && material.map === null && material.map === null ) {

				_diffuseColor.copy( material.color );
				_emissiveColor.copy( material.emissive );

				if ( material.vertexColors === THREE.FaceColors ) {

					_diffuseColor.r *= element.color.r;
					_diffuseColor.g *= element.color.g;
					_diffuseColor.b *= element.color.b;

				}

				if ( _enableLighting === true ) {

					if ( material.wireframe === false && material.shading == THREE.SmoothShading && element.vertexNormalsLength == 3 ) {

						_color1.r = _color2.r = _color3.r = _ambientLight.r;
						_color1.g = _color2.g = _color3.g = _ambientLight.g;
						_color1.b = _color2.b = _color3.b = _ambientLight.b;

						calculateLight( element.v1.positionWorld, element.vertexNormalsWorld[ 0 ], _color1 );
						calculateLight( element.v2.positionWorld, element.vertexNormalsWorld[ 1 ], _color2 );
						calculateLight( element.v3.positionWorld, element.vertexNormalsWorld[ 2 ], _color3 );

						_color1.r = _color1.r * _diffuseColor.r + _emissiveColor.r;
						_color1.g = _color1.g * _diffuseColor.g + _emissiveColor.g;
						_color1.b = _color1.b * _diffuseColor.b + _emissiveColor.b;

						_color2.r = _color2.r * _diffuseColor.r + _emissiveColor.r;
						_color2.g = _color2.g * _diffuseColor.g + _emissiveColor.g;
						_color2.b = _color2.b * _diffuseColor.b + _emissiveColor.b;

						_color3.r = _color3.r * _diffuseColor.r + _emissiveColor.r;
						_color3.g = _color3.g * _diffuseColor.g + _emissiveColor.g;
						_color3.b = _color3.b * _diffuseColor.b + _emissiveColor.b;

						_color4.r = ( _color2.r + _color3.r ) * 0.5;
						_color4.g = ( _color2.g + _color3.g ) * 0.5;
						_color4.b = ( _color2.b + _color3.b ) * 0.5;

						_image = getGradientTexture( _color1, _color2, _color3, _color4 );

						clipImage( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, 0, 0, 1, 0, 0, 1, _image );

					} else {

						_color.r = _ambientLight.r;
						_color.g = _ambientLight.g;
						_color.b = _ambientLight.b;

						calculateLight( element.centroidWorld, element.normalWorld, _color );

						_color.r = _color.r * _diffuseColor.r + _emissiveColor.r;
						_color.g = _color.g * _diffuseColor.g + _emissiveColor.g;
						_color.b = _color.b * _diffuseColor.b + _emissiveColor.b;

						material.wireframe === true
							? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin )
							: fillPath( _color );

					}

				} else {

					material.wireframe === true
						? strokePath( material.color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin )
						: fillPath( material.color );

				}

			} else if ( material instanceof THREE.MeshBasicMaterial || material instanceof THREE.MeshLambertMaterial || material instanceof THREE.MeshPhongMaterial ) {

				if ( material.map !== null ) {

					if ( material.map.mapping instanceof THREE.UVMapping ) {

						_uvs = element.uvs[ 0 ];
						patternPath( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _uvs[ uv1 ].u, _uvs[ uv1 ].v, _uvs[ uv2 ].u, _uvs[ uv2 ].v, _uvs[ uv3 ].u, _uvs[ uv3 ].v, material.map );

					}


				} else if ( material.envMap !== null ) {

					if ( material.envMap.mapping instanceof THREE.SphericalReflectionMapping ) {

						var cameraMatrix = camera.matrixWorldInverse;

						_vector3.copy( element.vertexNormalsWorld[ uv1 ] );
						_uv1x = ( _vector3.x * cameraMatrix.elements[0] + _vector3.y * cameraMatrix.elements[4] + _vector3.z * cameraMatrix.elements[8] ) * 0.5 + 0.5;
						_uv1y = ( _vector3.x * cameraMatrix.elements[1] + _vector3.y * cameraMatrix.elements[5] + _vector3.z * cameraMatrix.elements[9] ) * 0.5 + 0.5;

						_vector3.copy( element.vertexNormalsWorld[ uv2 ] );
						_uv2x = ( _vector3.x * cameraMatrix.elements[0] + _vector3.y * cameraMatrix.elements[4] + _vector3.z * cameraMatrix.elements[8] ) * 0.5 + 0.5;
						_uv2y = ( _vector3.x * cameraMatrix.elements[1] + _vector3.y * cameraMatrix.elements[5] + _vector3.z * cameraMatrix.elements[9] ) * 0.5 + 0.5;

						_vector3.copy( element.vertexNormalsWorld[ uv3 ] );
						_uv3x = ( _vector3.x * cameraMatrix.elements[0] + _vector3.y * cameraMatrix.elements[4] + _vector3.z * cameraMatrix.elements[8] ) * 0.5 + 0.5;
						_uv3y = ( _vector3.x * cameraMatrix.elements[1] + _vector3.y * cameraMatrix.elements[5] + _vector3.z * cameraMatrix.elements[9] ) * 0.5 + 0.5;

						patternPath( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _uv1x, _uv1y, _uv2x, _uv2y, _uv3x, _uv3y, material.envMap );

					}/* else if ( material.envMap.mapping == THREE.SphericalRefractionMapping ) {



					}*/


				} else {

					_color.copy( material.color );

					if ( material.vertexColors === THREE.FaceColors ) {

						_color.r *= element.color.r;
						_color.g *= element.color.g;
						_color.b *= element.color.b;

					}

					material.wireframe === true
						? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin )
						: fillPath( _color );

				}

			} else if ( material instanceof THREE.MeshDepthMaterial ) {

				_near = camera.near;
				_far = camera.far;

				_color1.r = _color1.g = _color1.b = 1 - smoothstep( v1.positionScreen.z, _near, _far );
				_color2.r = _color2.g = _color2.b = 1 - smoothstep( v2.positionScreen.z, _near, _far );
				_color3.r = _color3.g = _color3.b = 1 - smoothstep( v3.positionScreen.z, _near, _far );

				_color4.r = ( _color2.r + _color3.r ) * 0.5;
				_color4.g = ( _color2.g + _color3.g ) * 0.5;
				_color4.b = ( _color2.b + _color3.b ) * 0.5;

				_image = getGradientTexture( _color1, _color2, _color3, _color4 );

				clipImage( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, 0, 0, 1, 0, 0, 1, _image );

			} else if ( material instanceof THREE.MeshNormalMaterial ) {

				_color.r = normalToComponent( element.normalWorld.x );
				_color.g = normalToComponent( element.normalWorld.y );
				_color.b = normalToComponent( element.normalWorld.z );

				material.wireframe === true
					? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin )
					: fillPath( _color );

			}

		}

		function renderFace4( v1, v2, v3, v4, v5, v6, element, material, scene ) {

			_this.info.render.vertices += 4;
			_this.info.render.faces ++;

			setOpacity( material.opacity );
			setBlending( material.blending );

			if ( ( material.map !== undefined && material.map !== null ) || ( material.envMap !== undefined && material.envMap !== null ) ) {

				// Let renderFace3() handle this

				renderFace3( v1, v2, v4, 0, 1, 3, element, material, scene );
				renderFace3( v5, v3, v6, 1, 2, 3, element, material, scene );

				return;

			}

			_v1x = v1.positionScreen.x; _v1y = v1.positionScreen.y;
			_v2x = v2.positionScreen.x; _v2y = v2.positionScreen.y;
			_v3x = v3.positionScreen.x; _v3y = v3.positionScreen.y;
			_v4x = v4.positionScreen.x; _v4y = v4.positionScreen.y;
			_v5x = v5.positionScreen.x; _v5y = v5.positionScreen.y;
			_v6x = v6.positionScreen.x; _v6y = v6.positionScreen.y;

			if ( material instanceof THREE.MeshLambertMaterial || material instanceof THREE.MeshPhongMaterial ) {

				_diffuseColor.copy( material.color );
				_emissiveColor.copy( material.emissive );

				if ( material.vertexColors === THREE.FaceColors ) {

					_diffuseColor.r *= element.color.r;
					_diffuseColor.g *= element.color.g;
					_diffuseColor.b *= element.color.b;

				}

				if ( _enableLighting === true ) {

					if ( material.wireframe === false && material.shading == THREE.SmoothShading && element.vertexNormalsLength == 4 ) {

						_color1.r = _color2.r = _color3.r = _color4.r = _ambientLight.r;
						_color1.g = _color2.g = _color3.g = _color4.g = _ambientLight.g;
						_color1.b = _color2.b = _color3.b = _color4.b = _ambientLight.b;

						calculateLight( element.v1.positionWorld, element.vertexNormalsWorld[ 0 ], _color1 );
						calculateLight( element.v2.positionWorld, element.vertexNormalsWorld[ 1 ], _color2 );
						calculateLight( element.v4.positionWorld, element.vertexNormalsWorld[ 3 ], _color3 );
						calculateLight( element.v3.positionWorld, element.vertexNormalsWorld[ 2 ], _color4 );

						_color1.r = _color1.r * _diffuseColor.r + _emissiveColor.r;
						_color1.g = _color1.g * _diffuseColor.g + _emissiveColor.g;
						_color1.b = _color1.b * _diffuseColor.b + _emissiveColor.b;

						_color2.r = _color2.r * _diffuseColor.r + _emissiveColor.r;
						_color2.g = _color2.g * _diffuseColor.g + _emissiveColor.g;
						_color2.b = _color2.b * _diffuseColor.b + _emissiveColor.b;

						_color3.r = _color3.r * _diffuseColor.r + _emissiveColor.r;
						_color3.g = _color3.g * _diffuseColor.g + _emissiveColor.g;
						_color3.b = _color3.b * _diffuseColor.b + _emissiveColor.b;

						_color4.r = _color4.r * _diffuseColor.r + _emissiveColor.r;
						_color4.g = _color4.g * _diffuseColor.g + _emissiveColor.g;
						_color4.b = _color4.b * _diffuseColor.b + _emissiveColor.b;

						_image = getGradientTexture( _color1, _color2, _color3, _color4 );

						// TODO: UVs are incorrect, v4->v3?

						drawTriangle( _v1x, _v1y, _v2x, _v2y, _v4x, _v4y );
						clipImage( _v1x, _v1y, _v2x, _v2y, _v4x, _v4y, 0, 0, 1, 0, 0, 1, _image );

						drawTriangle( _v5x, _v5y, _v3x, _v3y, _v6x, _v6y );
						clipImage( _v5x, _v5y, _v3x, _v3y, _v6x, _v6y, 1, 0, 1, 1, 0, 1, _image );

					} else {

						_color.r = _ambientLight.r;
						_color.g = _ambientLight.g;
						_color.b = _ambientLight.b;

						calculateLight( element.centroidWorld, element.normalWorld, _color );

						_color.r = _color.r * _diffuseColor.r + _emissiveColor.r;
						_color.g = _color.g * _diffuseColor.g + _emissiveColor.g;
						_color.b = _color.b * _diffuseColor.b + _emissiveColor.b;

						drawQuad( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _v4x, _v4y );

						material.wireframe === true
							? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin )
							: fillPath( _color );

					}

				} else {

					_color.r = _diffuseColor.r + _emissiveColor.r;
					_color.g = _diffuseColor.g + _emissiveColor.g;
					_color.b = _diffuseColor.b + _emissiveColor.b;

					drawQuad( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _v4x, _v4y );

					material.wireframe === true
						? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin )
						: fillPath( _color );

				}

			} else if ( material instanceof THREE.MeshBasicMaterial ) {

				_color.copy( material.color );

				if ( material.vertexColors === THREE.FaceColors ) {

					_color.r *= element.color.r;
					_color.g *= element.color.g;
					_color.b *= element.color.b;

				}

				drawQuad( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _v4x, _v4y );

				material.wireframe === true
					? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin )
					: fillPath( _color );

			} else if ( material instanceof THREE.MeshNormalMaterial ) {

				_color.r = normalToComponent( element.normalWorld.x );
				_color.g = normalToComponent( element.normalWorld.y );
				_color.b = normalToComponent( element.normalWorld.z );

				drawQuad( _v1x, _v1y, _v2x, _v2y, _v3x, _v3y, _v4x, _v4y );

				material.wireframe === true
					? strokePath( _color, material.wireframeLinewidth, material.wireframeLinecap, material.wireframeLinejoin )
					: fillPath( _color );

			} else if ( material instanceof THREE.MeshDepthMaterial ) {

				_near = camera.near;
				_far = camera.far;

				_color1.r = _color1.g = _color1.b = 1 - smoothstep( v1.positionScreen.z, _near, _far );
				_color2.r = _color2.g = _color2.b = 1 - smoothstep( v2.positionScreen.z, _near, _far );
				_color3.r = _color3.g = _color3.b = 1 - smoothstep( v4.positionScreen.z, _near, _far );
				_color4.r = _color4.g = _color4.b = 1 - smoothstep( v3.positionScreen.z, _near, _far );

				_image = getGradientTexture( _color1, _color2, _color3, _color4 );

				// TODO: UVs are incorrect, v4->v3?

				drawTriangle( _v1x, _v1y, _v2x, _v2y, _v4x, _v4y );
				clipImage( _v1x, _v1y, _v2x, _v2y, _v4x, _v4y, 0, 0, 1, 0, 0, 1, _image );

				drawTriangle( _v5x, _v5y, _v3x, _v3y, _v6x, _v6y );
				clipImage( _v5x, _v5y, _v3x, _v3y, _v6x, _v6y, 1, 0, 1, 1, 0, 1, _image );

			}

		}

		//

		function drawTriangle( x0, y0, x1, y1, x2, y2 ) {

			_context.beginPath();
			_context.moveTo( x0, y0 );
			_context.lineTo( x1, y1 );
			_context.lineTo( x2, y2 );
			_context.closePath();

		}

		function drawQuad( x0, y0, x1, y1, x2, y2, x3, y3 ) {

			_context.beginPath();
			_context.moveTo( x0, y0 );
			_context.lineTo( x1, y1 );
			_context.lineTo( x2, y2 );
			_context.lineTo( x3, y3 );
			_context.closePath();

		}

		function strokePath( color, linewidth, linecap, linejoin ) {

			setLineWidth( linewidth );
			setLineCap( linecap );
			setLineJoin( linejoin );
			setStrokeStyle( color.getContextStyle() );

			_context.stroke();

			_bboxRect.inflate( linewidth * 2 );

		}

		function fillPath( color ) {

			setFillStyle( color.getContextStyle() );
			_context.fill();

		}

		function patternPath( x0, y0, x1, y1, x2, y2, u0, v0, u1, v1, u2, v2, texture ) {

			if ( texture instanceof THREE.DataTexture || texture.image === undefined || texture.image.width == 0 ) return;

			if ( texture.needsUpdate === true ) {

				var repeatX = texture.wrapS == THREE.RepeatWrapping;
				var repeatY = texture.wrapT == THREE.RepeatWrapping;

				_patterns[ texture.id ] = _context.createPattern(
					texture.image, repeatX === true && repeatY === true
						? 'repeat'
						: repeatX === true && repeatY === false
							? 'repeat-x'
							: repeatX === false && repeatY === true
								? 'repeat-y'
								: 'no-repeat'
				);

				texture.needsUpdate = false;

			}

			_patterns[ texture.id ] === undefined
				? setFillStyle( 'rgba(0,0,0,1)' )
				: setFillStyle( _patterns[ texture.id ] );

			// http://extremelysatisfactorytotalitarianism.com/blog/?p=2120

			var a, b, c, d, e, f, det, idet,
			offsetX = texture.offset.x / texture.repeat.x,
			offsetY = texture.offset.y / texture.repeat.y,
			width = texture.image.width * texture.repeat.x,
			height = texture.image.height * texture.repeat.y;

			u0 = ( u0 + offsetX ) * width;
			v0 = ( 1.0 - v0 + offsetY ) * height;

			u1 = ( u1 + offsetX ) * width;
			v1 = ( 1.0 - v1 + offsetY ) * height;

			u2 = ( u2 + offsetX ) * width;
			v2 = ( 1.0 - v2 + offsetY ) * height;

			x1 -= x0; y1 -= y0;
			x2 -= x0; y2 -= y0;

			u1 -= u0; v1 -= v0;
			u2 -= u0; v2 -= v0;

			det = u1 * v2 - u2 * v1;

			if ( det === 0 ) {

				if ( _imagedatas[ texture.id ] === undefined ) {

					var canvas = document.createElement( 'canvas' )
					canvas.width = texture.image.width;
					canvas.height = texture.image.height;

					var context = canvas.getContext( '2d' );
					context.drawImage( texture.image, 0, 0 );

					_imagedatas[ texture.id ] = context.getImageData( 0, 0, texture.image.width, texture.image.height ).data;

				}

				var data = _imagedatas[ texture.id ];
				var index = ( Math.floor( u0 ) + Math.floor( v0 ) * texture.image.width ) * 4;

				_color.setRGB( data[ index ] / 255, data[ index + 1 ] / 255, data[ index + 2 ] / 255 );
				fillPath( _color );

				return;

			}

			idet = 1 / det;

			a = ( v2 * x1 - v1 * x2 ) * idet;
			b = ( v2 * y1 - v1 * y2 ) * idet;
			c = ( u1 * x2 - u2 * x1 ) * idet;
			d = ( u1 * y2 - u2 * y1 ) * idet;

			e = x0 - a * u0 - c * v0;
			f = y0 - b * u0 - d * v0;

			_context.save();
			_context.transform( a, b, c, d, e, f );
			_context.fill();
			_context.restore();

		}

		function clipImage( x0, y0, x1, y1, x2, y2, u0, v0, u1, v1, u2, v2, image ) {

			// http://extremelysatisfactorytotalitarianism.com/blog/?p=2120

			var a, b, c, d, e, f, det, idet,
			width = image.width - 1,
			height = image.height - 1;

			u0 *= width; v0 *= height;
			u1 *= width; v1 *= height;
			u2 *= width; v2 *= height;

			x1 -= x0; y1 -= y0;
			x2 -= x0; y2 -= y0;

			u1 -= u0; v1 -= v0;
			u2 -= u0; v2 -= v0;

			det = u1 * v2 - u2 * v1;

			idet = 1 / det;

			a = ( v2 * x1 - v1 * x2 ) * idet;
			b = ( v2 * y1 - v1 * y2 ) * idet;
			c = ( u1 * x2 - u2 * x1 ) * idet;
			d = ( u1 * y2 - u2 * y1 ) * idet;

			e = x0 - a * u0 - c * v0;
			f = y0 - b * u0 - d * v0;

			_context.save();
			_context.transform( a, b, c, d, e, f );
			_context.clip();
			_context.drawImage( image, 0, 0 );
			_context.restore();

		}

		function getGradientTexture( color1, color2, color3, color4 ) {

			// http://mrdoob.com/blog/post/710

			_pixelMapData[ 0 ] = ( color1.r * 255 ) | 0;
			_pixelMapData[ 1 ] = ( color1.g * 255 ) | 0;
			_pixelMapData[ 2 ] = ( color1.b * 255 ) | 0;

			_pixelMapData[ 4 ] = ( color2.r * 255 ) | 0;
			_pixelMapData[ 5 ] = ( color2.g * 255 ) | 0;
			_pixelMapData[ 6 ] = ( color2.b * 255 ) | 0;

			_pixelMapData[ 8 ] = ( color3.r * 255 ) | 0;
			_pixelMapData[ 9 ] = ( color3.g * 255 ) | 0;
			_pixelMapData[ 10 ] = ( color3.b * 255 ) | 0;

			_pixelMapData[ 12 ] = ( color4.r * 255 ) | 0;
			_pixelMapData[ 13 ] = ( color4.g * 255 ) | 0;
			_pixelMapData[ 14 ] = ( color4.b * 255 ) | 0;

			_pixelMapContext.putImageData( _pixelMapImage, 0, 0 );
			_gradientMapContext.drawImage( _pixelMap, 0, 0 );

			return _gradientMap;

		}

		function smoothstep( value, min, max ) {

			var x = ( value - min ) / ( max - min );
			return x * x * ( 3 - 2 * x );

		}

		function normalToComponent( normal ) {

			var component = ( normal + 1 ) * 0.5;
			return component < 0 ? 0 : ( component > 1 ? 1 : component );

		}

		// Hide anti-alias gaps

		function expand( v1, v2 ) {

			var x = v2.x - v1.x, y =  v2.y - v1.y,
			det = x * x + y * y, idet;

			if ( det === 0 ) return;

			idet = 1 / Math.sqrt( det );

			x *= idet; y *= idet;

			v2.x += x; v2.y += y;
			v1.x -= x; v1.y -= y;

		}
	};

	// Context cached methods.

	function setOpacity( value ) {

		if ( _contextGlobalAlpha !== value ) {

			_context.globalAlpha = value;
			_contextGlobalAlpha = value;

		}

	}

	function setBlending( value ) {

		if ( _contextGlobalCompositeOperation !== value ) {

			if ( value === THREE.NormalBlending ) {

				_context.globalCompositeOperation = 'source-over';

			} else if ( value === THREE.AdditiveBlending ) {

				_context.globalCompositeOperation = 'lighter';

			} else if ( value === THREE.SubtractiveBlending ) {

				_context.globalCompositeOperation = 'darker';

			}

			_contextGlobalCompositeOperation = value;

		}

	}

	function setLineWidth( value ) {

		if ( _contextLineWidth !== value ) {

			_context.lineWidth = value;
			_contextLineWidth = value;

		}

	}

	function setLineCap( value ) {

		// "butt", "round", "square"

		if ( _contextLineCap !== value ) {

			_context.lineCap = value;
			_contextLineCap = value;

		}

	}

	function setLineJoin( value ) {

		// "round", "bevel", "miter"

		if ( _contextLineJoin !== value ) {

			_context.lineJoin = value;
			_contextLineJoin = value;

		}

	}

	function setStrokeStyle( value ) {

		if ( _contextStrokeStyle !== value ) {

			_context.strokeStyle = value;
			_contextStrokeStyle = value;

		}

	}

	function setFillStyle( value ) {

		if ( _contextFillStyle !== value ) {

			_context.fillStyle = value;
			_contextFillStyle = value;

		}

	}

};
/**
 * @author alteredq / http://alteredqualia.com/
 * @author mrdoob / http://mrdoob.com/
 * @author mikael emtinger / http://gomo.se/
 */

THREE.ShaderChunk = {

	// FOG

	fog_pars_fragment: [

		"#ifdef USE_FOG",

			"uniform vec3 fogColor;",

			"#ifdef FOG_EXP2",

				"uniform float fogDensity;",

			"#else",

				"uniform float fogNear;",
				"uniform float fogFar;",

			"#endif",

		"#endif"

	].join("\n"),

	fog_fragment: [

		"#ifdef USE_FOG",

			"float depth = gl_FragCoord.z / gl_FragCoord.w;",

			"#ifdef FOG_EXP2",

				"const float LOG2 = 1.442695;",
				"float fogFactor = exp2( - fogDensity * fogDensity * depth * depth * LOG2 );",
				"fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );",

			"#else",

				"float fogFactor = smoothstep( fogNear, fogFar, depth );",

			"#endif",

			"gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );",

		"#endif"

	].join("\n"),

	// ENVIRONMENT MAP

	envmap_pars_fragment: [

		"#ifdef USE_ENVMAP",

			"uniform float reflectivity;",
			"uniform samplerCube envMap;",
			"uniform float flipEnvMap;",
			"uniform int combine;",

			"#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )",

				"uniform bool useRefract;",
				"uniform float refractionRatio;",

			"#else",

				"varying vec3 vReflect;",

			"#endif",

		"#endif"

	].join("\n"),

	envmap_fragment: [

		"#ifdef USE_ENVMAP",

			"vec3 reflectVec;",

			"#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )",

				"vec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );",

				"if ( useRefract ) {",

					"reflectVec = refract( cameraToVertex, normal, refractionRatio );",

				"} else { ",

					"reflectVec = reflect( cameraToVertex, normal );",

				"}",

			"#else",

				"reflectVec = vReflect;",

			"#endif",

			"#ifdef DOUBLE_SIDED",

				"float flipNormal = ( -1.0 + 2.0 * float( gl_FrontFacing ) );",
				"vec4 cubeColor = textureCube( envMap, flipNormal * vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );",

			"#else",

				"vec4 cubeColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );",

			"#endif",

			"#ifdef GAMMA_INPUT",

				"cubeColor.xyz *= cubeColor.xyz;",

			"#endif",

			"if ( combine == 1 ) {",

				"gl_FragColor.xyz = mix( gl_FragColor.xyz, cubeColor.xyz, specularStrength * reflectivity );",

			"} else if ( combine == 2 ) {",

				"gl_FragColor.xyz += cubeColor.xyz * specularStrength * reflectivity;",

			"} else {",

				"gl_FragColor.xyz = mix( gl_FragColor.xyz, gl_FragColor.xyz * cubeColor.xyz, specularStrength * reflectivity );",

			"}",

		"#endif"

	].join("\n"),

	envmap_pars_vertex: [

		"#if defined( USE_ENVMAP ) && ! defined( USE_BUMPMAP ) && ! defined( USE_NORMALMAP )",

			"varying vec3 vReflect;",

			"uniform float refractionRatio;",
			"uniform bool useRefract;",

		"#endif"

	].join("\n"),

	worldpos_vertex : [

		"#if defined( USE_ENVMAP ) || defined( PHONG ) || defined( LAMBERT ) || defined ( USE_SHADOWMAP )",

			"#ifdef USE_SKINNING",

				"vec4 worldPosition = modelMatrix * skinned;",

			"#endif",

			"#if defined( USE_MORPHTARGETS ) && ! defined( USE_SKINNING )",

				"vec4 worldPosition = modelMatrix * vec4( morphed, 1.0 );",

			"#endif",

			"#if ! defined( USE_MORPHTARGETS ) && ! defined( USE_SKINNING )",

				"vec4 worldPosition = modelMatrix * vec4( position, 1.0 );",

			"#endif",

		"#endif"

	].join("\n"),

	envmap_vertex : [

		"#if defined( USE_ENVMAP ) && ! defined( USE_BUMPMAP ) && ! defined( USE_NORMALMAP )",

			"vec3 worldNormal = mat3( modelMatrix[ 0 ].xyz, modelMatrix[ 1 ].xyz, modelMatrix[ 2 ].xyz ) * objectNormal;",
			"worldNormal = normalize( worldNormal );",

			"vec3 cameraToVertex = normalize( worldPosition.xyz - cameraPosition );",

			"if ( useRefract ) {",

				"vReflect = refract( cameraToVertex, worldNormal, refractionRatio );",

			"} else {",

				"vReflect = reflect( cameraToVertex, worldNormal );",

			"}",

		"#endif"

	].join("\n"),

	// COLOR MAP (particles)

	map_particle_pars_fragment: [

		"#ifdef USE_MAP",

			"uniform sampler2D map;",

		"#endif"

	].join("\n"),


	map_particle_fragment: [

		"#ifdef USE_MAP",

			"gl_FragColor = gl_FragColor * texture2D( map, vec2( gl_PointCoord.x, 1.0 - gl_PointCoord.y ) );",

		"#endif"

	].join("\n"),

	// COLOR MAP (triangles)

	map_pars_vertex: [

		"#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP )",

			"varying vec2 vUv;",
			"uniform vec4 offsetRepeat;",

		"#endif"

	].join("\n"),

	map_pars_fragment: [

		"#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP )",

			"varying vec2 vUv;",

		"#endif",

		"#ifdef USE_MAP",

			"uniform sampler2D map;",

		"#endif",

	].join("\n"),

	map_vertex: [

		"#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP )",

			"vUv = uv * offsetRepeat.zw + offsetRepeat.xy;",

		"#endif"

	].join("\n"),

	map_fragment: [

		"#ifdef USE_MAP",

			"#ifdef GAMMA_INPUT",

				"vec4 texelColor = texture2D( map, vUv );",
				"texelColor.xyz *= texelColor.xyz;",

				"gl_FragColor = gl_FragColor * texelColor;",

			"#else",

				"gl_FragColor = gl_FragColor * texture2D( map, vUv );",

			"#endif",

		"#endif"

	].join("\n"),

	// LIGHT MAP

	lightmap_pars_fragment: [

		"#ifdef USE_LIGHTMAP",

			"varying vec2 vUv2;",
			"uniform sampler2D lightMap;",

		"#endif"

	].join("\n"),

	lightmap_pars_vertex: [

		"#ifdef USE_LIGHTMAP",

			"varying vec2 vUv2;",

		"#endif"

	].join("\n"),

	lightmap_fragment: [

		"#ifdef USE_LIGHTMAP",

			"gl_FragColor = gl_FragColor * texture2D( lightMap, vUv2 );",

		"#endif"

	].join("\n"),

	lightmap_vertex: [

		"#ifdef USE_LIGHTMAP",

			"vUv2 = uv2;",

		"#endif"

	].join("\n"),

	// BUMP MAP

	bumpmap_pars_fragment: [

		"#ifdef USE_BUMPMAP",

			"uniform sampler2D bumpMap;",
			"uniform float bumpScale;",

			// Derivative maps - bump mapping unparametrized surfaces by Morten Mikkelsen
			//	http://mmikkelsen3d.blogspot.sk/2011/07/derivative-maps.html

			// Evaluate the derivative of the height w.r.t. screen-space using forward differencing (listing 2)

			"vec2 dHdxy_fwd() {",

				"vec2 dSTdx = dFdx( vUv );",
				"vec2 dSTdy = dFdy( vUv );",

				"float Hll = bumpScale * texture2D( bumpMap, vUv ).x;",
				"float dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;",
				"float dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;",

				"return vec2( dBx, dBy );",

			"}",

			"vec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {",

				"vec3 vSigmaX = dFdx( surf_pos );",
				"vec3 vSigmaY = dFdy( surf_pos );",
				"vec3 vN = surf_norm;",		// normalized

				"vec3 R1 = cross( vSigmaY, vN );",
				"vec3 R2 = cross( vN, vSigmaX );",

				"float fDet = dot( vSigmaX, R1 );",

				"vec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );",
				"return normalize( abs( fDet ) * surf_norm - vGrad );",

			"}",

		"#endif"

	].join("\n"),

	// NORMAL MAP

	normalmap_pars_fragment: [

		"#ifdef USE_NORMALMAP",

			"uniform sampler2D normalMap;",
			"uniform vec2 normalScale;",

			// Per-Pixel Tangent Space Normal Mapping
			// http://hacksoflife.blogspot.ch/2009/11/per-pixel-tangent-space-normal-mapping.html

			"vec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm ) {",

				"vec3 q0 = dFdx( eye_pos.xyz );",
				"vec3 q1 = dFdy( eye_pos.xyz );",
				"vec2 st0 = dFdx( vUv.st );",
				"vec2 st1 = dFdy( vUv.st );",

				"vec3 S = normalize(  q0 * st1.t - q1 * st0.t );",
				"vec3 T = normalize( -q0 * st1.s + q1 * st0.s );",
				"vec3 N = normalize( surf_norm );",

				"vec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;",
				"mapN.xy = normalScale * mapN.xy;",
				"mat3 tsn = mat3( S, T, N );",
				"return normalize( tsn * mapN );",

			"}",

		"#endif"

	].join("\n"),

	// SPECULAR MAP

	specularmap_pars_fragment: [

		"#ifdef USE_SPECULARMAP",

			"uniform sampler2D specularMap;",

		"#endif"

	].join("\n"),

	specularmap_fragment: [

		"float specularStrength;",

		"#ifdef USE_SPECULARMAP",

			"vec4 texelSpecular = texture2D( specularMap, vUv );",
			"specularStrength = texelSpecular.r;",

		"#else",

			"specularStrength = 1.0;",

		"#endif"

	].join("\n"),

	// LIGHTS LAMBERT

	lights_lambert_pars_vertex: [

		"uniform vec3 ambient;",
		"uniform vec3 diffuse;",
		"uniform vec3 emissive;",

		"uniform vec3 ambientLightColor;",

		"#if MAX_DIR_LIGHTS > 0",

			"uniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];",
			"uniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];",

		"#endif",

		"#if MAX_HEMI_LIGHTS > 0",

			"uniform vec3 hemisphereLightSkyColor[ MAX_HEMI_LIGHTS ];",
			"uniform vec3 hemisphereLightGroundColor[ MAX_HEMI_LIGHTS ];",
			"uniform vec3 hemisphereLightDirection[ MAX_HEMI_LIGHTS ];",

		"#endif",

		"#if MAX_POINT_LIGHTS > 0",

			"uniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];",
			"uniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];",
			"uniform float pointLightDistance[ MAX_POINT_LIGHTS ];",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0",

			"uniform vec3 spotLightColor[ MAX_SPOT_LIGHTS ];",
			"uniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];",
			"uniform vec3 spotLightDirection[ MAX_SPOT_LIGHTS ];",
			"uniform float spotLightDistance[ MAX_SPOT_LIGHTS ];",
			"uniform float spotLightAngleCos[ MAX_SPOT_LIGHTS ];",
			"uniform float spotLightExponent[ MAX_SPOT_LIGHTS ];",

		"#endif",

		"#ifdef WRAP_AROUND",

			"uniform vec3 wrapRGB;",

		"#endif"

	].join("\n"),

	lights_lambert_vertex: [

		"vLightFront = vec3( 0.0 );",

		"#ifdef DOUBLE_SIDED",

			"vLightBack = vec3( 0.0 );",

		"#endif",

		"transformedNormal = normalize( transformedNormal );",

		"#if MAX_DIR_LIGHTS > 0",

		"for( int i = 0; i < MAX_DIR_LIGHTS; i ++ ) {",

			"vec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );",
			"vec3 dirVector = normalize( lDirection.xyz );",

			"float dotProduct = dot( transformedNormal, dirVector );",
			"vec3 directionalLightWeighting = vec3( max( dotProduct, 0.0 ) );",

			"#ifdef DOUBLE_SIDED",

				"vec3 directionalLightWeightingBack = vec3( max( -dotProduct, 0.0 ) );",

				"#ifdef WRAP_AROUND",

					"vec3 directionalLightWeightingHalfBack = vec3( max( -0.5 * dotProduct + 0.5, 0.0 ) );",

				"#endif",

			"#endif",

			"#ifdef WRAP_AROUND",

				"vec3 directionalLightWeightingHalf = vec3( max( 0.5 * dotProduct + 0.5, 0.0 ) );",
				"directionalLightWeighting = mix( directionalLightWeighting, directionalLightWeightingHalf, wrapRGB );",

				"#ifdef DOUBLE_SIDED",

					"directionalLightWeightingBack = mix( directionalLightWeightingBack, directionalLightWeightingHalfBack, wrapRGB );",

				"#endif",

			"#endif",

			"vLightFront += directionalLightColor[ i ] * directionalLightWeighting;",

			"#ifdef DOUBLE_SIDED",

				"vLightBack += directionalLightColor[ i ] * directionalLightWeightingBack;",

			"#endif",

		"}",

		"#endif",

		"#if MAX_POINT_LIGHTS > 0",

			"for( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {",

				"vec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );",
				"vec3 lVector = lPosition.xyz - mvPosition.xyz;",

				"float lDistance = 1.0;",
				"if ( pointLightDistance[ i ] > 0.0 )",
					"lDistance = 1.0 - min( ( length( lVector ) / pointLightDistance[ i ] ), 1.0 );",

				"lVector = normalize( lVector );",
				"float dotProduct = dot( transformedNormal, lVector );",

				"vec3 pointLightWeighting = vec3( max( dotProduct, 0.0 ) );",

				"#ifdef DOUBLE_SIDED",

					"vec3 pointLightWeightingBack = vec3( max( -dotProduct, 0.0 ) );",

					"#ifdef WRAP_AROUND",

						"vec3 pointLightWeightingHalfBack = vec3( max( -0.5 * dotProduct + 0.5, 0.0 ) );",

					"#endif",

				"#endif",

				"#ifdef WRAP_AROUND",

					"vec3 pointLightWeightingHalf = vec3( max( 0.5 * dotProduct + 0.5, 0.0 ) );",
					"pointLightWeighting = mix( pointLightWeighting, pointLightWeightingHalf, wrapRGB );",

					"#ifdef DOUBLE_SIDED",

						"pointLightWeightingBack = mix( pointLightWeightingBack, pointLightWeightingHalfBack, wrapRGB );",

					"#endif",

				"#endif",

				"vLightFront += pointLightColor[ i ] * pointLightWeighting * lDistance;",

				"#ifdef DOUBLE_SIDED",

					"vLightBack += pointLightColor[ i ] * pointLightWeightingBack * lDistance;",

				"#endif",

			"}",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0",

			"for( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {",

				"vec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );",
				"vec3 lVector = lPosition.xyz - mvPosition.xyz;",

				"float spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - worldPosition.xyz ) );",

				"if ( spotEffect > spotLightAngleCos[ i ] ) {",

					"spotEffect = max( pow( spotEffect, spotLightExponent[ i ] ), 0.0 );",

					"float lDistance = 1.0;",
					"if ( spotLightDistance[ i ] > 0.0 )",
						"lDistance = 1.0 - min( ( length( lVector ) / spotLightDistance[ i ] ), 1.0 );",

					"lVector = normalize( lVector );",

					"float dotProduct = dot( transformedNormal, lVector );",
					"vec3 spotLightWeighting = vec3( max( dotProduct, 0.0 ) );",

					"#ifdef DOUBLE_SIDED",

						"vec3 spotLightWeightingBack = vec3( max( -dotProduct, 0.0 ) );",

						"#ifdef WRAP_AROUND",

							"vec3 spotLightWeightingHalfBack = vec3( max( -0.5 * dotProduct + 0.5, 0.0 ) );",

						"#endif",

					"#endif",

					"#ifdef WRAP_AROUND",

						"vec3 spotLightWeightingHalf = vec3( max( 0.5 * dotProduct + 0.5, 0.0 ) );",
						"spotLightWeighting = mix( spotLightWeighting, spotLightWeightingHalf, wrapRGB );",

						"#ifdef DOUBLE_SIDED",

							"spotLightWeightingBack = mix( spotLightWeightingBack, spotLightWeightingHalfBack, wrapRGB );",

						"#endif",

					"#endif",

					"vLightFront += spotLightColor[ i ] * spotLightWeighting * lDistance * spotEffect;",

					"#ifdef DOUBLE_SIDED",

						"vLightBack += spotLightColor[ i ] * spotLightWeightingBack * lDistance * spotEffect;",

					"#endif",

				"}",

			"}",

		"#endif",

		"#if MAX_HEMI_LIGHTS > 0",

			"for( int i = 0; i < MAX_HEMI_LIGHTS; i ++ ) {",

				"vec4 lDirection = viewMatrix * vec4( hemisphereLightDirection[ i ], 0.0 );",
				"vec3 lVector = normalize( lDirection.xyz );",

				"float dotProduct = dot( transformedNormal, lVector );",

				"float hemiDiffuseWeight = 0.5 * dotProduct + 0.5;",
				"float hemiDiffuseWeightBack = -0.5 * dotProduct + 0.5;",

				"vLightFront += mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );",

				"#ifdef DOUBLE_SIDED",

					"vLightBack += mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeightBack );",

				"#endif",

			"}",

		"#endif",

		"vLightFront = vLightFront * diffuse + ambient * ambientLightColor + emissive;",

		"#ifdef DOUBLE_SIDED",

			"vLightBack = vLightBack * diffuse + ambient * ambientLightColor + emissive;",

		"#endif"

	].join("\n"),

	// LIGHTS PHONG

	lights_phong_pars_vertex: [

		"#ifndef PHONG_PER_PIXEL",

		"#if MAX_POINT_LIGHTS > 0",

			"uniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];",
			"uniform float pointLightDistance[ MAX_POINT_LIGHTS ];",

			"varying vec4 vPointLight[ MAX_POINT_LIGHTS ];",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0",

			"uniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];",
			"uniform float spotLightDistance[ MAX_SPOT_LIGHTS ];",

			"varying vec4 vSpotLight[ MAX_SPOT_LIGHTS ];",

		"#endif",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0 || defined( USE_BUMPMAP )",

			"varying vec3 vWorldPosition;",

		"#endif"

	].join("\n"),


	lights_phong_vertex: [

		"#ifndef PHONG_PER_PIXEL",

		"#if MAX_POINT_LIGHTS > 0",

			"for( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {",

				"vec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );",
				"vec3 lVector = lPosition.xyz - mvPosition.xyz;",

				"float lDistance = 1.0;",
				"if ( pointLightDistance[ i ] > 0.0 )",
					"lDistance = 1.0 - min( ( length( lVector ) / pointLightDistance[ i ] ), 1.0 );",

				"vPointLight[ i ] = vec4( lVector, lDistance );",

			"}",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0",

			"for( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {",

				"vec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );",
				"vec3 lVector = lPosition.xyz - mvPosition.xyz;",

				"float lDistance = 1.0;",
				"if ( spotLightDistance[ i ] > 0.0 )",
					"lDistance = 1.0 - min( ( length( lVector ) / spotLightDistance[ i ] ), 1.0 );",

				"vSpotLight[ i ] = vec4( lVector, lDistance );",

			"}",

		"#endif",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0 || defined( USE_BUMPMAP )",

			"vWorldPosition = worldPosition.xyz;",

		"#endif"

	].join("\n"),

	lights_phong_pars_fragment: [

		"uniform vec3 ambientLightColor;",

		"#if MAX_DIR_LIGHTS > 0",

			"uniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];",
			"uniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];",

		"#endif",

		"#if MAX_HEMI_LIGHTS > 0",

			"uniform vec3 hemisphereLightSkyColor[ MAX_HEMI_LIGHTS ];",
			"uniform vec3 hemisphereLightGroundColor[ MAX_HEMI_LIGHTS ];",
			"uniform vec3 hemisphereLightDirection[ MAX_HEMI_LIGHTS ];",

		"#endif",

		"#if MAX_POINT_LIGHTS > 0",

			"uniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];",

			"#ifdef PHONG_PER_PIXEL",

				"uniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];",
				"uniform float pointLightDistance[ MAX_POINT_LIGHTS ];",

			"#else",

				"varying vec4 vPointLight[ MAX_POINT_LIGHTS ];",

			"#endif",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0",

			"uniform vec3 spotLightColor[ MAX_SPOT_LIGHTS ];",
			"uniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];",
			"uniform vec3 spotLightDirection[ MAX_SPOT_LIGHTS ];",
			"uniform float spotLightAngleCos[ MAX_SPOT_LIGHTS ];",
			"uniform float spotLightExponent[ MAX_SPOT_LIGHTS ];",

			"#ifdef PHONG_PER_PIXEL",

				"uniform float spotLightDistance[ MAX_SPOT_LIGHTS ];",

			"#else",

				"varying vec4 vSpotLight[ MAX_SPOT_LIGHTS ];",

			"#endif",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0 || defined( USE_BUMPMAP )",

			"varying vec3 vWorldPosition;",

		"#endif",

		"#ifdef WRAP_AROUND",

			"uniform vec3 wrapRGB;",

		"#endif",

		"varying vec3 vViewPosition;",
		"varying vec3 vNormal;"

	].join("\n"),

	lights_phong_fragment: [

		"vec3 normal = normalize( vNormal );",
		"vec3 viewPosition = normalize( vViewPosition );",

		"#ifdef DOUBLE_SIDED",

			"normal = normal * ( -1.0 + 2.0 * float( gl_FrontFacing ) );",

		"#endif",

		"#ifdef USE_NORMALMAP",

			"normal = perturbNormal2Arb( -viewPosition, normal );",

		"#elif defined( USE_BUMPMAP )",

			"normal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );",

		"#endif",

		"#if MAX_POINT_LIGHTS > 0",

			"vec3 pointDiffuse  = vec3( 0.0 );",
			"vec3 pointSpecular = vec3( 0.0 );",

			"for ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {",

				"#ifdef PHONG_PER_PIXEL",

					"vec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );",
					"vec3 lVector = lPosition.xyz + vViewPosition.xyz;",

					"float lDistance = 1.0;",
					"if ( pointLightDistance[ i ] > 0.0 )",
						"lDistance = 1.0 - min( ( length( lVector ) / pointLightDistance[ i ] ), 1.0 );",

					"lVector = normalize( lVector );",

				"#else",

					"vec3 lVector = normalize( vPointLight[ i ].xyz );",
					"float lDistance = vPointLight[ i ].w;",

				"#endif",

				// diffuse

				"float dotProduct = dot( normal, lVector );",

				"#ifdef WRAP_AROUND",

					"float pointDiffuseWeightFull = max( dotProduct, 0.0 );",
					"float pointDiffuseWeightHalf = max( 0.5 * dotProduct + 0.5, 0.0 );",

					"vec3 pointDiffuseWeight = mix( vec3 ( pointDiffuseWeightFull ), vec3( pointDiffuseWeightHalf ), wrapRGB );",

				"#else",

					"float pointDiffuseWeight = max( dotProduct, 0.0 );",

				"#endif",

				"pointDiffuse  += diffuse * pointLightColor[ i ] * pointDiffuseWeight * lDistance;",

				// specular

				"vec3 pointHalfVector = normalize( lVector + viewPosition );",
				"float pointDotNormalHalf = max( dot( normal, pointHalfVector ), 0.0 );",
				"float pointSpecularWeight = specularStrength * max( pow( pointDotNormalHalf, shininess ), 0.0 );",

				"#ifdef PHYSICALLY_BASED_SHADING",

					// 2.0 => 2.0001 is hack to work around ANGLE bug

					"float specularNormalization = ( shininess + 2.0001 ) / 8.0;",

					"vec3 schlick = specular + vec3( 1.0 - specular ) * pow( 1.0 - dot( lVector, pointHalfVector ), 5.0 );",
					"pointSpecular += schlick * pointLightColor[ i ] * pointSpecularWeight * pointDiffuseWeight * lDistance * specularNormalization;",

				"#else",

					"pointSpecular += specular * pointLightColor[ i ] * pointSpecularWeight * pointDiffuseWeight * lDistance;",

				"#endif",

			"}",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0",

			"vec3 spotDiffuse  = vec3( 0.0 );",
			"vec3 spotSpecular = vec3( 0.0 );",

			"for ( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {",

				"#ifdef PHONG_PER_PIXEL",

					"vec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );",
					"vec3 lVector = lPosition.xyz + vViewPosition.xyz;",

					"float lDistance = 1.0;",
					"if ( spotLightDistance[ i ] > 0.0 )",
						"lDistance = 1.0 - min( ( length( lVector ) / spotLightDistance[ i ] ), 1.0 );",

					"lVector = normalize( lVector );",

				"#else",

					"vec3 lVector = normalize( vSpotLight[ i ].xyz );",
					"float lDistance = vSpotLight[ i ].w;",

				"#endif",

				"float spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - vWorldPosition ) );",

				"if ( spotEffect > spotLightAngleCos[ i ] ) {",

					"spotEffect = max( pow( spotEffect, spotLightExponent[ i ] ), 0.0 );",

					// diffuse

					"float dotProduct = dot( normal, lVector );",

					"#ifdef WRAP_AROUND",

						"float spotDiffuseWeightFull = max( dotProduct, 0.0 );",
						"float spotDiffuseWeightHalf = max( 0.5 * dotProduct + 0.5, 0.0 );",

						"vec3 spotDiffuseWeight = mix( vec3 ( spotDiffuseWeightFull ), vec3( spotDiffuseWeightHalf ), wrapRGB );",

					"#else",

						"float spotDiffuseWeight = max( dotProduct, 0.0 );",

					"#endif",

					"spotDiffuse += diffuse * spotLightColor[ i ] * spotDiffuseWeight * lDistance * spotEffect;",

					// specular

					"vec3 spotHalfVector = normalize( lVector + viewPosition );",
					"float spotDotNormalHalf = max( dot( normal, spotHalfVector ), 0.0 );",
					"float spotSpecularWeight = specularStrength * max( pow( spotDotNormalHalf, shininess ), 0.0 );",

					"#ifdef PHYSICALLY_BASED_SHADING",

						// 2.0 => 2.0001 is hack to work around ANGLE bug

						"float specularNormalization = ( shininess + 2.0001 ) / 8.0;",

						"vec3 schlick = specular + vec3( 1.0 - specular ) * pow( 1.0 - dot( lVector, spotHalfVector ), 5.0 );",
						"spotSpecular += schlick * spotLightColor[ i ] * spotSpecularWeight * spotDiffuseWeight * lDistance * specularNormalization * spotEffect;",

					"#else",

						"spotSpecular += specular * spotLightColor[ i ] * spotSpecularWeight * spotDiffuseWeight * lDistance * spotEffect;",

					"#endif",

				"}",

			"}",

		"#endif",

		"#if MAX_DIR_LIGHTS > 0",

			"vec3 dirDiffuse  = vec3( 0.0 );",
			"vec3 dirSpecular = vec3( 0.0 );" ,

			"for( int i = 0; i < MAX_DIR_LIGHTS; i ++ ) {",

				"vec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );",
				"vec3 dirVector = normalize( lDirection.xyz );",

				// diffuse

				"float dotProduct = dot( normal, dirVector );",

				"#ifdef WRAP_AROUND",

					"float dirDiffuseWeightFull = max( dotProduct, 0.0 );",
					"float dirDiffuseWeightHalf = max( 0.5 * dotProduct + 0.5, 0.0 );",

					"vec3 dirDiffuseWeight = mix( vec3( dirDiffuseWeightFull ), vec3( dirDiffuseWeightHalf ), wrapRGB );",

				"#else",

					"float dirDiffuseWeight = max( dotProduct, 0.0 );",

				"#endif",

				"dirDiffuse  += diffuse * directionalLightColor[ i ] * dirDiffuseWeight;",

				// specular

				"vec3 dirHalfVector = normalize( dirVector + viewPosition );",
				"float dirDotNormalHalf = max( dot( normal, dirHalfVector ), 0.0 );",
				"float dirSpecularWeight = specularStrength * max( pow( dirDotNormalHalf, shininess ), 0.0 );",

				"#ifdef PHYSICALLY_BASED_SHADING",

					/*
					// fresnel term from skin shader
					"const float F0 = 0.128;",

					"float base = 1.0 - dot( viewPosition, dirHalfVector );",
					"float exponential = pow( base, 5.0 );",

					"float fresnel = exponential + F0 * ( 1.0 - exponential );",
					*/

					/*
					// fresnel term from fresnel shader
					"const float mFresnelBias = 0.08;",
					"const float mFresnelScale = 0.3;",
					"const float mFresnelPower = 5.0;",

					"float fresnel = mFresnelBias + mFresnelScale * pow( 1.0 + dot( normalize( -viewPosition ), normal ), mFresnelPower );",
					*/

					// 2.0 => 2.0001 is hack to work around ANGLE bug

					"float specularNormalization = ( shininess + 2.0001 ) / 8.0;",

					//"dirSpecular += specular * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight * specularNormalization * fresnel;",

					"vec3 schlick = specular + vec3( 1.0 - specular ) * pow( 1.0 - dot( dirVector, dirHalfVector ), 5.0 );",
					"dirSpecular += schlick * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight * specularNormalization;",

				"#else",

					"dirSpecular += specular * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight;",

				"#endif",

			"}",

		"#endif",

		"#if MAX_HEMI_LIGHTS > 0",

			"vec3 hemiDiffuse  = vec3( 0.0 );",
			"vec3 hemiSpecular = vec3( 0.0 );" ,

			"for( int i = 0; i < MAX_HEMI_LIGHTS; i ++ ) {",

				"vec4 lDirection = viewMatrix * vec4( hemisphereLightDirection[ i ], 0.0 );",
				"vec3 lVector = normalize( lDirection.xyz );",

				// diffuse

				"float dotProduct = dot( normal, lVector );",
				"float hemiDiffuseWeight = 0.5 * dotProduct + 0.5;",

				"vec3 hemiColor = mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );",

				"hemiDiffuse += diffuse * hemiColor;",

				// specular (sky light)

				"vec3 hemiHalfVectorSky = normalize( lVector + viewPosition );",
				"float hemiDotNormalHalfSky = 0.5 * dot( normal, hemiHalfVectorSky ) + 0.5;",
				"float hemiSpecularWeightSky = specularStrength * max( pow( hemiDotNormalHalfSky, shininess ), 0.0 );",

				// specular (ground light)

				"vec3 lVectorGround = -lVector;",

				"vec3 hemiHalfVectorGround = normalize( lVectorGround + viewPosition );",
				"float hemiDotNormalHalfGround = 0.5 * dot( normal, hemiHalfVectorGround ) + 0.5;",
				"float hemiSpecularWeightGround = specularStrength * max( pow( hemiDotNormalHalfGround, shininess ), 0.0 );",

				"#ifdef PHYSICALLY_BASED_SHADING",

					"float dotProductGround = dot( normal, lVectorGround );",

					// 2.0 => 2.0001 is hack to work around ANGLE bug

					"float specularNormalization = ( shininess + 2.0001 ) / 8.0;",

					"vec3 schlickSky = specular + vec3( 1.0 - specular ) * pow( 1.0 - dot( lVector, hemiHalfVectorSky ), 5.0 );",
					"vec3 schlickGround = specular + vec3( 1.0 - specular ) * pow( 1.0 - dot( lVectorGround, hemiHalfVectorGround ), 5.0 );",
					"hemiSpecular += hemiColor * specularNormalization * ( schlickSky * hemiSpecularWeightSky * max( dotProduct, 0.0 ) + schlickGround * hemiSpecularWeightGround * max( dotProductGround, 0.0 ) );",

				"#else",

					"hemiSpecular += specular * hemiColor * ( hemiSpecularWeightSky + hemiSpecularWeightGround ) * hemiDiffuseWeight;",

				"#endif",

			"}",

		"#endif",

		"vec3 totalDiffuse = vec3( 0.0 );",
		"vec3 totalSpecular = vec3( 0.0 );",

		"#if MAX_DIR_LIGHTS > 0",

			"totalDiffuse += dirDiffuse;",
			"totalSpecular += dirSpecular;",

		"#endif",

		"#if MAX_HEMI_LIGHTS > 0",

			"totalDiffuse += hemiDiffuse;",
			"totalSpecular += hemiSpecular;",

		"#endif",

		"#if MAX_POINT_LIGHTS > 0",

			"totalDiffuse += pointDiffuse;",
			"totalSpecular += pointSpecular;",

		"#endif",

		"#if MAX_SPOT_LIGHTS > 0",

			"totalDiffuse += spotDiffuse;",
			"totalSpecular += spotSpecular;",

		"#endif",

		"#ifdef METAL",

			"gl_FragColor.xyz = gl_FragColor.xyz * ( emissive + totalDiffuse + ambientLightColor * ambient + totalSpecular );",

		"#else",

			"gl_FragColor.xyz = gl_FragColor.xyz * ( emissive + totalDiffuse + ambientLightColor * ambient ) + totalSpecular;",

		"#endif"

	].join("\n"),

	// VERTEX COLORS

	color_pars_fragment: [

		"#ifdef USE_COLOR",

			"varying vec3 vColor;",

		"#endif"

	].join("\n"),


	color_fragment: [

		"#ifdef USE_COLOR",

			"gl_FragColor = gl_FragColor * vec4( vColor, opacity );",

		"#endif"

	].join("\n"),

	color_pars_vertex: [

		"#ifdef USE_COLOR",

			"varying vec3 vColor;",

		"#endif"

	].join("\n"),


	color_vertex: [

		"#ifdef USE_COLOR",

			"#ifdef GAMMA_INPUT",

				"vColor = color * color;",

			"#else",

				"vColor = color;",

			"#endif",

		"#endif"

	].join("\n"),

	// SKINNING

	skinning_pars_vertex: [

		"#ifdef USE_SKINNING",

			"#ifdef BONE_TEXTURE",

				"uniform sampler2D boneTexture;",

				"mat4 getBoneMatrix( const in float i ) {",

					"float j = i * 4.0;",
					"float x = mod( j, N_BONE_PIXEL_X );",
					"float y = floor( j / N_BONE_PIXEL_X );",

					"const float dx = 1.0 / N_BONE_PIXEL_X;",
					"const float dy = 1.0 / N_BONE_PIXEL_Y;",

					"y = dy * ( y + 0.5 );",

					"vec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );",
					"vec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );",
					"vec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );",
					"vec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );",

					"mat4 bone = mat4( v1, v2, v3, v4 );",

					"return bone;",

				"}",

			"#else",

				"uniform mat4 boneGlobalMatrices[ MAX_BONES ];",

				"mat4 getBoneMatrix( const in float i ) {",

					"mat4 bone = boneGlobalMatrices[ int(i) ];",
					"return bone;",

				"}",

			"#endif",

		"#endif"

	].join("\n"),

	skinbase_vertex: [

		"#ifdef USE_SKINNING",

			"mat4 boneMatX = getBoneMatrix( skinIndex.x );",
			"mat4 boneMatY = getBoneMatrix( skinIndex.y );",

		"#endif"

	].join("\n"),

	skinning_vertex: [

		"#ifdef USE_SKINNING",

			"#ifdef USE_MORPHTARGETS",

			"vec4 skinVertex = vec4( morphed, 1.0 );",

			"#else",

			"vec4 skinVertex = vec4( position, 1.0 );",

			"#endif",

			"vec4 skinned  = boneMatX * skinVertex * skinWeight.x;",
			"skinned 	  += boneMatY * skinVertex * skinWeight.y;",

		"#endif"

	].join("\n"),

	// MORPHING

	morphtarget_pars_vertex: [

		"#ifdef USE_MORPHTARGETS",

			"#ifndef USE_MORPHNORMALS",

			"uniform float morphTargetInfluences[ 8 ];",

			"#else",

			"uniform float morphTargetInfluences[ 4 ];",

			"#endif",

		"#endif"

	].join("\n"),

	morphtarget_vertex: [

		"#ifdef USE_MORPHTARGETS",

			"vec3 morphed = vec3( 0.0 );",
			"morphed += ( morphTarget0 - position ) * morphTargetInfluences[ 0 ];",
			"morphed += ( morphTarget1 - position ) * morphTargetInfluences[ 1 ];",
			"morphed += ( morphTarget2 - position ) * morphTargetInfluences[ 2 ];",
			"morphed += ( morphTarget3 - position ) * morphTargetInfluences[ 3 ];",

			"#ifndef USE_MORPHNORMALS",

			"morphed += ( morphTarget4 - position ) * morphTargetInfluences[ 4 ];",
			"morphed += ( morphTarget5 - position ) * morphTargetInfluences[ 5 ];",
			"morphed += ( morphTarget6 - position ) * morphTargetInfluences[ 6 ];",
			"morphed += ( morphTarget7 - position ) * morphTargetInfluences[ 7 ];",

			"#endif",

			"morphed += position;",

		"#endif"

	].join("\n"),

	default_vertex : [

		"vec4 mvPosition;",

		"#ifdef USE_SKINNING",

			"mvPosition = modelViewMatrix * skinned;",

		"#endif",

		"#if !defined( USE_SKINNING ) && defined( USE_MORPHTARGETS )",

			"mvPosition = modelViewMatrix * vec4( morphed, 1.0 );",

		"#endif",

		"#if !defined( USE_SKINNING ) && ! defined( USE_MORPHTARGETS )",

			"mvPosition = modelViewMatrix * vec4( position, 1.0 );",

		"#endif",

		"gl_Position = projectionMatrix * mvPosition;",

	].join("\n"),

	morphnormal_vertex: [

		"#ifdef USE_MORPHNORMALS",

			"vec3 morphedNormal = vec3( 0.0 );",

			"morphedNormal +=  ( morphNormal0 - normal ) * morphTargetInfluences[ 0 ];",
			"morphedNormal +=  ( morphNormal1 - normal ) * morphTargetInfluences[ 1 ];",
			"morphedNormal +=  ( morphNormal2 - normal ) * morphTargetInfluences[ 2 ];",
			"morphedNormal +=  ( morphNormal3 - normal ) * morphTargetInfluences[ 3 ];",

			"morphedNormal += normal;",

		"#endif"

	].join("\n"),

	skinnormal_vertex: [

		"#ifdef USE_SKINNING",

			"mat4 skinMatrix = skinWeight.x * boneMatX;",
			"skinMatrix 	+= skinWeight.y * boneMatY;",

			"#ifdef USE_MORPHNORMALS",

			"vec4 skinnedNormal = skinMatrix * vec4( morphedNormal, 0.0 );",

			"#else",

			"vec4 skinnedNormal = skinMatrix * vec4( normal, 0.0 );",

			"#endif",

		"#endif"

	].join("\n"),

	defaultnormal_vertex: [

		"vec3 objectNormal;",

		"#ifdef USE_SKINNING",

			"objectNormal = skinnedNormal.xyz;",

		"#endif",

		"#if !defined( USE_SKINNING ) && defined( USE_MORPHNORMALS )",

			"objectNormal = morphedNormal;",

		"#endif",

		"#if !defined( USE_SKINNING ) && ! defined( USE_MORPHNORMALS )",

			"objectNormal = normal;",

		"#endif",

		"#ifdef FLIP_SIDED",

			"objectNormal = -objectNormal;",

		"#endif",

		"vec3 transformedNormal = normalMatrix * objectNormal;",

	].join("\n"),

	// SHADOW MAP

	// based on SpiderGL shadow map and Fabien Sanglard's GLSL shadow mapping examples
	//  http://spidergl.org/example.php?id=6
	// 	http://fabiensanglard.net/shadowmapping

	shadowmap_pars_fragment: [

		"#ifdef USE_SHADOWMAP",

			"uniform sampler2D shadowMap[ MAX_SHADOWS ];",
			"uniform vec2 shadowMapSize[ MAX_SHADOWS ];",

			"uniform float shadowDarkness[ MAX_SHADOWS ];",
			"uniform float shadowBias[ MAX_SHADOWS ];",

			"varying vec4 vShadowCoord[ MAX_SHADOWS ];",

			"float unpackDepth( const in vec4 rgba_depth ) {",

				"const vec4 bit_shift = vec4( 1.0 / ( 256.0 * 256.0 * 256.0 ), 1.0 / ( 256.0 * 256.0 ), 1.0 / 256.0, 1.0 );",
				"float depth = dot( rgba_depth, bit_shift );",
				"return depth;",

			"}",

		"#endif"

	].join("\n"),

	shadowmap_fragment: [

		"#ifdef USE_SHADOWMAP",

			"#ifdef SHADOWMAP_DEBUG",

				"vec3 frustumColors[3];",
				"frustumColors[0] = vec3( 1.0, 0.5, 0.0 );",
				"frustumColors[1] = vec3( 0.0, 1.0, 0.8 );",
				"frustumColors[2] = vec3( 0.0, 0.5, 1.0 );",

			"#endif",

			"#ifdef SHADOWMAP_CASCADE",

				"int inFrustumCount = 0;",

			"#endif",

			"float fDepth;",
			"vec3 shadowColor = vec3( 1.0 );",

			"for( int i = 0; i < MAX_SHADOWS; i ++ ) {",

				"vec3 shadowCoord = vShadowCoord[ i ].xyz / vShadowCoord[ i ].w;",

				// "if ( something && something )" 		 breaks ATI OpenGL shader compiler
				// "if ( all( something, something ) )"  using this instead

				"bvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );",
				"bool inFrustum = all( inFrustumVec );",

				// don't shadow pixels outside of light frustum
				// use just first frustum (for cascades)
				// don't shadow pixels behind far plane of light frustum

				"#ifdef SHADOWMAP_CASCADE",

					"inFrustumCount += int( inFrustum );",
					"bvec3 frustumTestVec = bvec3( inFrustum, inFrustumCount == 1, shadowCoord.z <= 1.0 );",

				"#else",

					"bvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );",

				"#endif",

				"bool frustumTest = all( frustumTestVec );",

				"if ( frustumTest ) {",

					"shadowCoord.z += shadowBias[ i ];",

					"#ifdef SHADOWMAP_SOFT",

						// Percentage-close filtering
						// (9 pixel kernel)
						// http://fabiensanglard.net/shadowmappingPCF/

						"float shadow = 0.0;",

						/*
						// nested loops breaks shader compiler / validator on some ATI cards when using OpenGL
						// must enroll loop manually

						"for ( float y = -1.25; y <= 1.25; y += 1.25 )",
							"for ( float x = -1.25; x <= 1.25; x += 1.25 ) {",

								"vec4 rgbaDepth = texture2D( shadowMap[ i ], vec2( x * xPixelOffset, y * yPixelOffset ) + shadowCoord.xy );",

								// doesn't seem to produce any noticeable visual difference compared to simple "texture2D" lookup
								//"vec4 rgbaDepth = texture2DProj( shadowMap[ i ], vec4( vShadowCoord[ i ].w * ( vec2( x * xPixelOffset, y * yPixelOffset ) + shadowCoord.xy ), 0.05, vShadowCoord[ i ].w ) );",

								"float fDepth = unpackDepth( rgbaDepth );",

								"if ( fDepth < shadowCoord.z )",
									"shadow += 1.0;",

						"}",

						"shadow /= 9.0;",

						*/

						"const float shadowDelta = 1.0 / 9.0;",

						"float xPixelOffset = 1.0 / shadowMapSize[ i ].x;",
						"float yPixelOffset = 1.0 / shadowMapSize[ i ].y;",

						"float dx0 = -1.25 * xPixelOffset;",
						"float dy0 = -1.25 * yPixelOffset;",
						"float dx1 = 1.25 * xPixelOffset;",
						"float dy1 = 1.25 * yPixelOffset;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy0 ) ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy0 ) ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy0 ) ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, 0.0 ) ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, 0.0 ) ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy1 ) ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy1 ) ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"fDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy1 ) ) );",
						"if ( fDepth < shadowCoord.z ) shadow += shadowDelta;",

						"shadowColor = shadowColor * vec3( ( 1.0 - shadowDarkness[ i ] * shadow ) );",

					"#else",

						"vec4 rgbaDepth = texture2D( shadowMap[ i ], shadowCoord.xy );",
						"float fDepth = unpackDepth( rgbaDepth );",

						"if ( fDepth < shadowCoord.z )",

							// spot with multiple shadows is darker

							"shadowColor = shadowColor * vec3( 1.0 - shadowDarkness[ i ] );",

							// spot with multiple shadows has the same color as single shadow spot

							//"shadowColor = min( shadowColor, vec3( shadowDarkness[ i ] ) );",

					"#endif",

				"}",


				"#ifdef SHADOWMAP_DEBUG",

					"#ifdef SHADOWMAP_CASCADE",

						"if ( inFrustum && inFrustumCount == 1 ) gl_FragColor.xyz *= frustumColors[ i ];",

					"#else",

						"if ( inFrustum ) gl_FragColor.xyz *= frustumColors[ i ];",

					"#endif",

				"#endif",

			"}",

			"#ifdef GAMMA_OUTPUT",

				"shadowColor *= shadowColor;",

			"#endif",

			"gl_FragColor.xyz = gl_FragColor.xyz * shadowColor;",

		"#endif"

	].join("\n"),

	shadowmap_pars_vertex: [

		"#ifdef USE_SHADOWMAP",

			"varying vec4 vShadowCoord[ MAX_SHADOWS ];",
			"uniform mat4 shadowMatrix[ MAX_SHADOWS ];",

		"#endif"

	].join("\n"),

	shadowmap_vertex: [

		"#ifdef USE_SHADOWMAP",

			"for( int i = 0; i < MAX_SHADOWS; i ++ ) {",

				"vShadowCoord[ i ] = shadowMatrix[ i ] * worldPosition;",

			"}",

		"#endif"

	].join("\n"),

	// ALPHATEST

	alphatest_fragment: [

		"#ifdef ALPHATEST",

			"if ( gl_FragColor.a < ALPHATEST ) discard;",

		"#endif"

	].join("\n"),

	// LINEAR SPACE

	linear_to_gamma_fragment: [

		"#ifdef GAMMA_OUTPUT",

			"gl_FragColor.xyz = sqrt( gl_FragColor.xyz );",

		"#endif"

	].join("\n"),


};

THREE.UniformsUtils = {

	merge: function ( uniforms ) {

		var u, p, tmp, merged = {};

		for ( u = 0; u < uniforms.length; u ++ ) {

			tmp = this.clone( uniforms[ u ] );

			for ( p in tmp ) {

				merged[ p ] = tmp[ p ];

			}

		}

		return merged;

	},

	clone: function ( uniforms_src ) {

		var u, p, parameter, parameter_src, uniforms_dst = {};

		for ( u in uniforms_src ) {

			uniforms_dst[ u ] = {};

			for ( p in uniforms_src[ u ] ) {

				parameter_src = uniforms_src[ u ][ p ];

				if ( parameter_src instanceof THREE.Color ||
					 parameter_src instanceof THREE.Vector2 ||
					 parameter_src instanceof THREE.Vector3 ||
					 parameter_src instanceof THREE.Vector4 ||
					 parameter_src instanceof THREE.Matrix4 ||
					 parameter_src instanceof THREE.Texture ) {

					uniforms_dst[ u ][ p ] = parameter_src.clone();

				} else if ( parameter_src instanceof Array ) {

					uniforms_dst[ u ][ p ] = parameter_src.slice();

				} else {

					uniforms_dst[ u ][ p ] = parameter_src;

				}

			}

		}

		return uniforms_dst;

	}

};

THREE.UniformsLib = {

	common: {

		"diffuse" : { type: "c", value: new THREE.Color( 0xeeeeee ) },
		"opacity" : { type: "f", value: 1.0 },

		"map" : { type: "t", value: null },
		"offsetRepeat" : { type: "v4", value: new THREE.Vector4( 0, 0, 1, 1 ) },

		"lightMap" : { type: "t", value: null },
		"specularMap" : { type: "t", value: null },

		"envMap" : { type: "t", value: null },
		"flipEnvMap" : { type: "f", value: -1 },
		"useRefract" : { type: "i", value: 0 },
		"reflectivity" : { type: "f", value: 1.0 },
		"refractionRatio" : { type: "f", value: 0.98 },
		"combine" : { type: "i", value: 0 },

		"morphTargetInfluences" : { type: "f", value: 0 }

	},

	bump: {

		"bumpMap" : { type: "t", value: null },
		"bumpScale" : { type: "f", value: 1 }

	},

	normalmap: {

		"normalMap" : { type: "t", value: null },
		"normalScale" : { type: "v2", value: new THREE.Vector2( 1, 1 ) }
	},

	fog : {

		"fogDensity" : { type: "f", value: 0.00025 },
		"fogNear" : { type: "f", value: 1 },
		"fogFar" : { type: "f", value: 2000 },
		"fogColor" : { type: "c", value: new THREE.Color( 0xffffff ) }

	},

	lights: {

		"ambientLightColor" : { type: "fv", value: [] },

		"directionalLightDirection" : { type: "fv", value: [] },
		"directionalLightColor" : { type: "fv", value: [] },

		"hemisphereLightDirection" : { type: "fv", value: [] },
		"hemisphereLightSkyColor" : { type: "fv", value: [] },
		"hemisphereLightGroundColor" : { type: "fv", value: [] },

		"pointLightColor" : { type: "fv", value: [] },
		"pointLightPosition" : { type: "fv", value: [] },
		"pointLightDistance" : { type: "fv1", value: [] },

		"spotLightColor" : { type: "fv", value: [] },
		"spotLightPosition" : { type: "fv", value: [] },
		"spotLightDirection" : { type: "fv", value: [] },
		"spotLightDistance" : { type: "fv1", value: [] },
		"spotLightAngleCos" : { type: "fv1", value: [] },
		"spotLightExponent" : { type: "fv1", value: [] }

	},

	particle: {

		"psColor" : { type: "c", value: new THREE.Color( 0xeeeeee ) },
		"opacity" : { type: "f", value: 1.0 },
		"size" : { type: "f", value: 1.0 },
		"scale" : { type: "f", value: 1.0 },
		"map" : { type: "t", value: null },

		"fogDensity" : { type: "f", value: 0.00025 },
		"fogNear" : { type: "f", value: 1 },
		"fogFar" : { type: "f", value: 2000 },
		"fogColor" : { type: "c", value: new THREE.Color( 0xffffff ) }

	},

	shadowmap: {

		"shadowMap": { type: "tv", value: [] },
		"shadowMapSize": { type: "v2v", value: [] },

		"shadowBias" : { type: "fv1", value: [] },
		"shadowDarkness": { type: "fv1", value: [] },

		"shadowMatrix" : { type: "m4v", value: [] },

	}

};

THREE.ShaderLib = {

	'depth': {

		uniforms: {

			"mNear": { type: "f", value: 1.0 },
			"mFar" : { type: "f", value: 2000.0 },
			"opacity" : { type: "f", value: 1.0 }

		},

		vertexShader: [

			"void main() {",

				"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",

			"}"

		].join("\n"),

		fragmentShader: [

			"uniform float mNear;",
			"uniform float mFar;",
			"uniform float opacity;",

			"void main() {",

				"float depth = gl_FragCoord.z / gl_FragCoord.w;",
				"float color = 1.0 - smoothstep( mNear, mFar, depth );",
				"gl_FragColor = vec4( vec3( color ), opacity );",

			"}"

		].join("\n")

	},

	'normal': {

		uniforms: {

			"opacity" : { type: "f", value: 1.0 }

		},

		vertexShader: [

			"varying vec3 vNormal;",

			"void main() {",

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
				"vNormal = normalize( normalMatrix * normal );",

				"gl_Position = projectionMatrix * mvPosition;",

			"}"

		].join("\n"),

		fragmentShader: [

			"uniform float opacity;",
			"varying vec3 vNormal;",

			"void main() {",

				"gl_FragColor = vec4( 0.5 * normalize( vNormal ) + 0.5, opacity );",

			"}"

		].join("\n")

	},

	'basic': {

		uniforms: THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "common" ],
			THREE.UniformsLib[ "fog" ],
			THREE.UniformsLib[ "shadowmap" ]

		] ),

		vertexShader: [

			THREE.ShaderChunk[ "map_pars_vertex" ],
			THREE.ShaderChunk[ "lightmap_pars_vertex" ],
			THREE.ShaderChunk[ "envmap_pars_vertex" ],
			THREE.ShaderChunk[ "color_pars_vertex" ],
			THREE.ShaderChunk[ "morphtarget_pars_vertex" ],
			THREE.ShaderChunk[ "skinning_pars_vertex" ],
			THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

			"void main() {",

				THREE.ShaderChunk[ "map_vertex" ],
				THREE.ShaderChunk[ "lightmap_vertex" ],
				THREE.ShaderChunk[ "color_vertex" ],

				"#ifdef USE_ENVMAP",

				THREE.ShaderChunk[ "morphnormal_vertex" ],
				THREE.ShaderChunk[ "skinbase_vertex" ],
				THREE.ShaderChunk[ "skinnormal_vertex" ],
				THREE.ShaderChunk[ "defaultnormal_vertex" ],

				"#endif",

				THREE.ShaderChunk[ "morphtarget_vertex" ],
				THREE.ShaderChunk[ "skinning_vertex" ],
				THREE.ShaderChunk[ "default_vertex" ],

				THREE.ShaderChunk[ "worldpos_vertex" ],
				THREE.ShaderChunk[ "envmap_vertex" ],
				THREE.ShaderChunk[ "shadowmap_vertex" ],

			"}"

		].join("\n"),

		fragmentShader: [

			"uniform vec3 diffuse;",
			"uniform float opacity;",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "map_pars_fragment" ],
			THREE.ShaderChunk[ "lightmap_pars_fragment" ],
			THREE.ShaderChunk[ "envmap_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],
			THREE.ShaderChunk[ "shadowmap_pars_fragment" ],
			THREE.ShaderChunk[ "specularmap_pars_fragment" ],

			"void main() {",

				"gl_FragColor = vec4( diffuse, opacity );",

				THREE.ShaderChunk[ "map_fragment" ],
				THREE.ShaderChunk[ "alphatest_fragment" ],
				THREE.ShaderChunk[ "specularmap_fragment" ],
				THREE.ShaderChunk[ "lightmap_fragment" ],
				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "envmap_fragment" ],
				THREE.ShaderChunk[ "shadowmap_fragment" ],

				THREE.ShaderChunk[ "linear_to_gamma_fragment" ],

				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n")

	},

	'lambert': {

		uniforms: THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "common" ],
			THREE.UniformsLib[ "fog" ],
			THREE.UniformsLib[ "lights" ],
			THREE.UniformsLib[ "shadowmap" ],

			{
				"ambient"  : { type: "c", value: new THREE.Color( 0xffffff ) },
				"emissive" : { type: "c", value: new THREE.Color( 0x000000 ) },
				"wrapRGB"  : { type: "v3", value: new THREE.Vector3( 1, 1, 1 ) }
			}

		] ),

		vertexShader: [

			"#define LAMBERT",

			"varying vec3 vLightFront;",

			"#ifdef DOUBLE_SIDED",

				"varying vec3 vLightBack;",

			"#endif",

			THREE.ShaderChunk[ "map_pars_vertex" ],
			THREE.ShaderChunk[ "lightmap_pars_vertex" ],
			THREE.ShaderChunk[ "envmap_pars_vertex" ],
			THREE.ShaderChunk[ "lights_lambert_pars_vertex" ],
			THREE.ShaderChunk[ "color_pars_vertex" ],
			THREE.ShaderChunk[ "morphtarget_pars_vertex" ],
			THREE.ShaderChunk[ "skinning_pars_vertex" ],
			THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

			"void main() {",

				THREE.ShaderChunk[ "map_vertex" ],
				THREE.ShaderChunk[ "lightmap_vertex" ],
				THREE.ShaderChunk[ "color_vertex" ],

				THREE.ShaderChunk[ "morphnormal_vertex" ],
				THREE.ShaderChunk[ "skinbase_vertex" ],
				THREE.ShaderChunk[ "skinnormal_vertex" ],
				THREE.ShaderChunk[ "defaultnormal_vertex" ],

				THREE.ShaderChunk[ "morphtarget_vertex" ],
				THREE.ShaderChunk[ "skinning_vertex" ],
				THREE.ShaderChunk[ "default_vertex" ],

				THREE.ShaderChunk[ "worldpos_vertex" ],
				THREE.ShaderChunk[ "envmap_vertex" ],
				THREE.ShaderChunk[ "lights_lambert_vertex" ],
				THREE.ShaderChunk[ "shadowmap_vertex" ],

			"}"

		].join("\n"),

		fragmentShader: [

			"uniform float opacity;",

			"varying vec3 vLightFront;",

			"#ifdef DOUBLE_SIDED",

				"varying vec3 vLightBack;",

			"#endif",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "map_pars_fragment" ],
			THREE.ShaderChunk[ "lightmap_pars_fragment" ],
			THREE.ShaderChunk[ "envmap_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],
			THREE.ShaderChunk[ "shadowmap_pars_fragment" ],
			THREE.ShaderChunk[ "specularmap_pars_fragment" ],

			"void main() {",

				"gl_FragColor = vec4( vec3 ( 1.0 ), opacity );",

				THREE.ShaderChunk[ "map_fragment" ],
				THREE.ShaderChunk[ "alphatest_fragment" ],
				THREE.ShaderChunk[ "specularmap_fragment" ],

				"#ifdef DOUBLE_SIDED",

					//"float isFront = float( gl_FrontFacing );",
					//"gl_FragColor.xyz *= isFront * vLightFront + ( 1.0 - isFront ) * vLightBack;",

					"if ( gl_FrontFacing )",
						"gl_FragColor.xyz *= vLightFront;",
					"else",
						"gl_FragColor.xyz *= vLightBack;",

				"#else",

					"gl_FragColor.xyz *= vLightFront;",

				"#endif",

				THREE.ShaderChunk[ "lightmap_fragment" ],
				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "envmap_fragment" ],
				THREE.ShaderChunk[ "shadowmap_fragment" ],

				THREE.ShaderChunk[ "linear_to_gamma_fragment" ],

				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n")

	},

	'phong': {

		uniforms: THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "common" ],
			THREE.UniformsLib[ "bump" ],
			THREE.UniformsLib[ "normalmap" ],
			THREE.UniformsLib[ "fog" ],
			THREE.UniformsLib[ "lights" ],
			THREE.UniformsLib[ "shadowmap" ],

			{
				"ambient"  : { type: "c", value: new THREE.Color( 0xffffff ) },
				"emissive" : { type: "c", value: new THREE.Color( 0x000000 ) },
				"specular" : { type: "c", value: new THREE.Color( 0x111111 ) },
				"shininess": { type: "f", value: 30 },
				"wrapRGB"  : { type: "v3", value: new THREE.Vector3( 1, 1, 1 ) }
			}

		] ),

		vertexShader: [

			"#define PHONG",

			"varying vec3 vViewPosition;",
			"varying vec3 vNormal;",

			THREE.ShaderChunk[ "map_pars_vertex" ],
			THREE.ShaderChunk[ "lightmap_pars_vertex" ],
			THREE.ShaderChunk[ "envmap_pars_vertex" ],
			THREE.ShaderChunk[ "lights_phong_pars_vertex" ],
			THREE.ShaderChunk[ "color_pars_vertex" ],
			THREE.ShaderChunk[ "morphtarget_pars_vertex" ],
			THREE.ShaderChunk[ "skinning_pars_vertex" ],
			THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

			"void main() {",

				THREE.ShaderChunk[ "map_vertex" ],
				THREE.ShaderChunk[ "lightmap_vertex" ],
				THREE.ShaderChunk[ "color_vertex" ],

				THREE.ShaderChunk[ "morphnormal_vertex" ],
				THREE.ShaderChunk[ "skinbase_vertex" ],
				THREE.ShaderChunk[ "skinnormal_vertex" ],
				THREE.ShaderChunk[ "defaultnormal_vertex" ],

				"vNormal = normalize( transformedNormal );",

				THREE.ShaderChunk[ "morphtarget_vertex" ],
				THREE.ShaderChunk[ "skinning_vertex" ],
				THREE.ShaderChunk[ "default_vertex" ],

				"vViewPosition = -mvPosition.xyz;",

				THREE.ShaderChunk[ "worldpos_vertex" ],
				THREE.ShaderChunk[ "envmap_vertex" ],
				THREE.ShaderChunk[ "lights_phong_vertex" ],
				THREE.ShaderChunk[ "shadowmap_vertex" ],

			"}"

		].join("\n"),

		fragmentShader: [

			"uniform vec3 diffuse;",
			"uniform float opacity;",

			"uniform vec3 ambient;",
			"uniform vec3 emissive;",
			"uniform vec3 specular;",
			"uniform float shininess;",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "map_pars_fragment" ],
			THREE.ShaderChunk[ "lightmap_pars_fragment" ],
			THREE.ShaderChunk[ "envmap_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],
			THREE.ShaderChunk[ "lights_phong_pars_fragment" ],
			THREE.ShaderChunk[ "shadowmap_pars_fragment" ],
			THREE.ShaderChunk[ "bumpmap_pars_fragment" ],
			THREE.ShaderChunk[ "normalmap_pars_fragment" ],
			THREE.ShaderChunk[ "specularmap_pars_fragment" ],

			"void main() {",

				"gl_FragColor = vec4( vec3 ( 1.0 ), opacity );",

				THREE.ShaderChunk[ "map_fragment" ],
				THREE.ShaderChunk[ "alphatest_fragment" ],
				THREE.ShaderChunk[ "specularmap_fragment" ],

				THREE.ShaderChunk[ "lights_phong_fragment" ],

				THREE.ShaderChunk[ "lightmap_fragment" ],
				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "envmap_fragment" ],
				THREE.ShaderChunk[ "shadowmap_fragment" ],

				THREE.ShaderChunk[ "linear_to_gamma_fragment" ],

				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n")

	},

	'particle_basic': {

		uniforms:  THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "particle" ],
			THREE.UniformsLib[ "shadowmap" ]

		] ),

		vertexShader: [

			"uniform float size;",
			"uniform float scale;",

			THREE.ShaderChunk[ "color_pars_vertex" ],
			THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

			"void main() {",

				THREE.ShaderChunk[ "color_vertex" ],

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",

				"#ifdef USE_SIZEATTENUATION",
					"gl_PointSize = size * ( scale / length( mvPosition.xyz ) );",
				"#else",
					"gl_PointSize = size;",
				"#endif",

				"gl_Position = projectionMatrix * mvPosition;",

				THREE.ShaderChunk[ "worldpos_vertex" ],
				THREE.ShaderChunk[ "shadowmap_vertex" ],

			"}"

		].join("\n"),

		fragmentShader: [

			"uniform vec3 psColor;",
			"uniform float opacity;",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "map_particle_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],
			THREE.ShaderChunk[ "shadowmap_pars_fragment" ],

			"void main() {",

				"gl_FragColor = vec4( psColor, opacity );",

				THREE.ShaderChunk[ "map_particle_fragment" ],
				THREE.ShaderChunk[ "alphatest_fragment" ],
				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "shadowmap_fragment" ],
				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n")

	},

	'dashed': {

		uniforms: THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "common" ],
			THREE.UniformsLib[ "fog" ],

			{
				"scale":     { type: "f", value: 1 },
				"dashSize":  { type: "f", value: 1 },
				"totalSize": { type: "f", value: 2 }
			}

		] ),

		vertexShader: [

			"uniform float scale;",
			"attribute float lineDistance;",

			"varying float vLineDistance;",

			THREE.ShaderChunk[ "color_pars_vertex" ],

			"void main() {",

				THREE.ShaderChunk[ "color_vertex" ],

				"vLineDistance = scale * lineDistance;",

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
				"gl_Position = projectionMatrix * mvPosition;",

			"}"

		].join("\n"),

		fragmentShader: [

			"uniform vec3 diffuse;",
			"uniform float opacity;",

			"uniform float dashSize;",
			"uniform float totalSize;",

			"varying float vLineDistance;",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],

			"void main() {",

				"if ( mod( vLineDistance, totalSize ) > dashSize ) {",

					"discard;",

				"}",

				"gl_FragColor = vec4( diffuse, opacity );",

				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n")

	},

	// Depth encoding into RGBA texture
	// 	based on SpiderGL shadow map example
	// 		http://spidergl.org/example.php?id=6
	// 	originally from
	//		http://www.gamedev.net/topic/442138-packing-a-float-into-a-a8r8g8b8-texture-shader/page__whichpage__1%25EF%25BF%25BD
	// 	see also here:
	//		http://aras-p.info/blog/2009/07/30/encoding-floats-to-rgba-the-final/

	'depthRGBA': {

		uniforms: {},

		vertexShader: [

			THREE.ShaderChunk[ "morphtarget_pars_vertex" ],
			THREE.ShaderChunk[ "skinning_pars_vertex" ],

			"void main() {",

				THREE.ShaderChunk[ "skinbase_vertex" ],
				THREE.ShaderChunk[ "morphtarget_vertex" ],
				THREE.ShaderChunk[ "skinning_vertex" ],
				THREE.ShaderChunk[ "default_vertex" ],

			"}"

		].join("\n"),

		fragmentShader: [

			"vec4 pack_depth( const in float depth ) {",

				"const vec4 bit_shift = vec4( 256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0 );",
				"const vec4 bit_mask  = vec4( 0.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0 );",
				"vec4 res = fract( depth * bit_shift );",
				"res -= res.xxyz * bit_mask;",
				"return res;",

			"}",

			"void main() {",

				"gl_FragData[ 0 ] = pack_depth( gl_FragCoord.z );",

				//"gl_FragData[ 0 ] = pack_depth( gl_FragCoord.z / gl_FragCoord.w );",
				//"float z = ( ( gl_FragCoord.z / gl_FragCoord.w ) - 3.0 ) / ( 4000.0 - 3.0 );",
				//"gl_FragData[ 0 ] = pack_depth( z );",
				//"gl_FragData[ 0 ] = vec4( z, z, z, 1.0 );",

			"}"

		].join("\n")

	}

};
/**
 * @author supereggbert / http://www.paulbrunt.co.uk/
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 * @author szimek / https://github.com/szimek/
 */

THREE.WebGLRenderer = function ( parameters ) {

	console.log( 'THREE.WebGLRenderer', THREE.REVISION );

	parameters = parameters || {};

	var _canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElement( 'canvas' ),

	_precision = parameters.precision !== undefined ? parameters.precision : 'highp',

	_alpha = parameters.alpha !== undefined ? parameters.alpha : true,
	_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,
	_antialias = parameters.antialias !== undefined ? parameters.antialias : false,
	_stencil = parameters.stencil !== undefined ? parameters.stencil : true,
	_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,

	_clearColor = parameters.clearColor !== undefined ? new THREE.Color( parameters.clearColor ) : new THREE.Color( 0x000000 ),
	_clearAlpha = parameters.clearAlpha !== undefined ? parameters.clearAlpha : 0;

	// public properties

	this.domElement = _canvas;
	this.context = null;

	// clearing

	this.autoClear = true;
	this.autoClearColor = true;
	this.autoClearDepth = true;
	this.autoClearStencil = true;

	// scene graph

	this.sortObjects = true;

	this.autoUpdateObjects = true;
	this.autoUpdateScene = true;

	// physically based shading

	this.gammaInput = false;
	this.gammaOutput = false;
	this.physicallyBasedShading = false;

	// shadow map

	this.shadowMapEnabled = false;
	this.shadowMapAutoUpdate = true;
	this.shadowMapSoft = true;
	this.shadowMapCullFrontFaces = true;
	this.shadowMapDebug = false;
	this.shadowMapCascade = false;

	// morphs

	this.maxMorphTargets = 8;
	this.maxMorphNormals = 4;

	// flags

	this.autoScaleCubemaps = true;

	// custom render plugins

	this.renderPluginsPre = [];
	this.renderPluginsPost = [];

	// info

	this.info = {

		memory: {

			programs: 0,
			geometries: 0,
			textures: 0

		},

		render: {

			calls: 0,
			vertices: 0,
			faces: 0,
			points: 0

		}

	};

	// internal properties

	var _this = this,

	_programs = [],
	_programs_counter = 0,

	// internal state cache

	_currentProgram = null,
	_currentFramebuffer = null,
	_currentMaterialId = -1,
	_currentGeometryGroupHash = null,
	_currentCamera = null,
	_geometryGroupCounter = 0,

	_usedTextureUnits = 0,

	// GL state cache

	_oldDoubleSided = -1,
	_oldFlipSided = -1,

	_oldBlending = -1,

	_oldBlendEquation = -1,
	_oldBlendSrc = -1,
	_oldBlendDst = -1,

	_oldDepthTest = -1,
	_oldDepthWrite = -1,

	_oldPolygonOffset = null,
	_oldPolygonOffsetFactor = null,
	_oldPolygonOffsetUnits = null,

	_oldLineWidth = null,

	_viewportX = 0,
	_viewportY = 0,
	_viewportWidth = 0,
	_viewportHeight = 0,
	_currentWidth = 0,
	_currentHeight = 0,

	// frustum

	_frustum = new THREE.Frustum(),

	 // camera matrices cache

	_projScreenMatrix = new THREE.Matrix4(),
	_projScreenMatrixPS = new THREE.Matrix4(),

	_vector3 = new THREE.Vector4(),

	// light arrays cache

	_direction = new THREE.Vector3(),

	_lightsNeedUpdate = true,

	_lights = {

		ambient: [ 0, 0, 0 ],
		directional: { length: 0, colors: new Array(), positions: new Array() },
		point: { length: 0, colors: new Array(), positions: new Array(), distances: new Array() },
		spot: { length: 0, colors: new Array(), positions: new Array(), distances: new Array(), directions: new Array(), anglesCos: new Array(), exponents: new Array() },
		hemi: { length: 0, skyColors: new Array(), groundColors: new Array(), positions: new Array() }

	};

	// initialize

	var _gl;

	var _glExtensionTextureFloat;
	var _glExtensionStandardDerivatives;
	var _glExtensionTextureFilterAnisotropic;
	var _glExtensionCompressedTextureS3TC;

	initGL();

	setDefaultGLState();

	this.context = _gl;

	// GPU capabilities

	var _maxTextures = _gl.getParameter( _gl.MAX_TEXTURE_IMAGE_UNITS );
	var _maxVertexTextures = _gl.getParameter( _gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS );
	var _maxTextureSize = _gl.getParameter( _gl.MAX_TEXTURE_SIZE );
	var _maxCubemapSize = _gl.getParameter( _gl.MAX_CUBE_MAP_TEXTURE_SIZE );

	var _maxAnisotropy = _glExtensionTextureFilterAnisotropic ? _gl.getParameter( _glExtensionTextureFilterAnisotropic.MAX_TEXTURE_MAX_ANISOTROPY_EXT ) : 0;

	var _supportsVertexTextures = ( _maxVertexTextures > 0 );
	var _supportsBoneTextures = _supportsVertexTextures && _glExtensionTextureFloat;

	var _compressedTextureFormats = _glExtensionCompressedTextureS3TC ? _gl.getParameter( _gl.COMPRESSED_TEXTURE_FORMATS ) : [];

	// API

	this.getContext = function () {

		return _gl;

	};

	this.supportsVertexTextures = function () {

		return _supportsVertexTextures;

	};

	this.getMaxAnisotropy  = function () {

		return _maxAnisotropy;

	};

	this.setSize = function ( width, height ) {

		_canvas.width = width;
		_canvas.height = height;

		this.setViewport( 0, 0, _canvas.width, _canvas.height );

	};

	this.setViewport = function ( x, y, width, height ) {

		_viewportX = x !== undefined ? x : 0;
		_viewportY = y !== undefined ? y : 0;

		_viewportWidth = width !== undefined ? width : _canvas.width;
		_viewportHeight = height !== undefined ? height : _canvas.height;

		_gl.viewport( _viewportX, _viewportY, _viewportWidth, _viewportHeight );

	};

	this.setScissor = function ( x, y, width, height ) {

		_gl.scissor( x, y, width, height );

	};

	this.enableScissorTest = function ( enable ) {

		enable ? _gl.enable( _gl.SCISSOR_TEST ) : _gl.disable( _gl.SCISSOR_TEST );

	};

	// Clearing

	this.setClearColorHex = function ( hex, alpha ) {

		_clearColor.setHex( hex );
		_clearAlpha = alpha;

		_gl.clearColor( _clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha );

	};

	this.setClearColor = function ( color, alpha ) {

		_clearColor.copy( color );
		_clearAlpha = alpha;

		_gl.clearColor( _clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha );

	};

	this.getClearColor = function () {

		return _clearColor;

	};

	this.getClearAlpha = function () {

		return _clearAlpha;

	};

	this.clear = function ( color, depth, stencil ) {

		var bits = 0;

		if ( color === undefined || color ) bits |= _gl.COLOR_BUFFER_BIT;
		if ( depth === undefined || depth ) bits |= _gl.DEPTH_BUFFER_BIT;
		if ( stencil === undefined || stencil ) bits |= _gl.STENCIL_BUFFER_BIT;

		_gl.clear( bits );

	};

	this.clearTarget = function ( renderTarget, color, depth, stencil ) {

		this.setRenderTarget( renderTarget );
		this.clear( color, depth, stencil );

	};

	// Plugins

	this.addPostPlugin = function ( plugin ) {

		plugin.init( this );
		this.renderPluginsPost.push( plugin );

	};

	this.addPrePlugin = function ( plugin ) {

		plugin.init( this );
		this.renderPluginsPre.push( plugin );

	};

	// Deallocation

	this.deallocateObject = function ( object ) {

		if ( ! object.__webglInit ) return;

		object.__webglInit = false;

		delete object._modelViewMatrix;
		delete object._normalMatrix;

		delete object._normalMatrixArray;
		delete object._modelViewMatrixArray;
		delete object._modelMatrixArray;

		if ( object instanceof THREE.Mesh ) {

			for ( var g in object.geometry.geometryGroups ) {

				deleteMeshBuffers( object.geometry.geometryGroups[ g ] );

			}

		} else if ( object instanceof THREE.Ribbon ) {

			deleteRibbonBuffers( object.geometry );

		} else if ( object instanceof THREE.Line ) {

			deleteLineBuffers( object.geometry );

		} else if ( object instanceof THREE.ParticleSystem ) {

			deleteParticleBuffers( object.geometry );

		}

	};

	this.deallocateTexture = function ( texture ) {

		if ( ! texture.__webglInit ) return;

		texture.__webglInit = false;
		_gl.deleteTexture( texture.__webglTexture );

		_this.info.memory.textures --;

	};

	this.deallocateRenderTarget = function ( renderTarget ) {

		if ( !renderTarget || ! renderTarget.__webglTexture ) return;

		_gl.deleteTexture( renderTarget.__webglTexture );

		if ( renderTarget instanceof THREE.WebGLRenderTargetCube ) {

			for ( var i = 0; i < 6; i ++ ) {

				_gl.deleteFramebuffer( renderTarget.__webglFramebuffer[ i ] );
				_gl.deleteRenderbuffer( renderTarget.__webglRenderbuffer[ i ] );

			}

		} else {

			_gl.deleteFramebuffer( renderTarget.__webglFramebuffer );
			_gl.deleteRenderbuffer( renderTarget.__webglRenderbuffer );

		}

	};

	this.deallocateMaterial = function ( material ) {

		var program = material.program;

		if ( ! program ) return;

		material.program = undefined;

		// only deallocate GL program if this was the last use of shared program
		// assumed there is only single copy of any program in the _programs list
		// (that's how it's constructed)

		var i, il, programInfo;
		var deleteProgram = false;

		for ( i = 0, il = _programs.length; i < il; i ++ ) {

			programInfo = _programs[ i ];

			if ( programInfo.program === program ) {

				programInfo.usedTimes --;

				if ( programInfo.usedTimes === 0 ) {

					deleteProgram = true;

				}

				break;

			}

		}

		if ( deleteProgram ) {

			// avoid using array.splice, this is costlier than creating new array from scratch

			var newPrograms = [];

			for ( i = 0, il = _programs.length; i < il; i ++ ) {

				programInfo = _programs[ i ];

				if ( programInfo.program !== program ) {

					newPrograms.push( programInfo );

				}

			}

			_programs = newPrograms;

			_gl.deleteProgram( program );

			_this.info.memory.programs --;

		}

	};

	// Rendering

	this.updateShadowMap = function ( scene, camera ) {

		_currentProgram = null;
		_oldBlending = -1;
		_oldDepthTest = -1;
		_oldDepthWrite = -1;
		_currentGeometryGroupHash = -1;
		_currentMaterialId = -1;
		_lightsNeedUpdate = true;
		_oldDoubleSided = -1;
		_oldFlipSided = -1;

		this.shadowMapPlugin.update( scene, camera );

	};

	// Internal functions

	// Buffer allocation

	function createParticleBuffers ( geometry ) {

		geometry.__webglVertexBuffer = _gl.createBuffer();
		geometry.__webglColorBuffer = _gl.createBuffer();

		_this.info.memory.geometries ++;

	};

	function createLineBuffers ( geometry ) {

		geometry.__webglVertexBuffer = _gl.createBuffer();
		geometry.__webglColorBuffer = _gl.createBuffer();
		geometry.__webglLineDistanceBuffer = _gl.createBuffer();

		_this.info.memory.geometries ++;

	};

	function createRibbonBuffers ( geometry ) {

		geometry.__webglVertexBuffer = _gl.createBuffer();
		geometry.__webglColorBuffer = _gl.createBuffer();
		geometry.__webglNormalBuffer = _gl.createBuffer();

		_this.info.memory.geometries ++;

	};

	function createMeshBuffers ( geometryGroup ) {

		geometryGroup.__webglVertexBuffer = _gl.createBuffer();
		geometryGroup.__webglNormalBuffer = _gl.createBuffer();
		geometryGroup.__webglTangentBuffer = _gl.createBuffer();
		geometryGroup.__webglColorBuffer = _gl.createBuffer();
		geometryGroup.__webglUVBuffer = _gl.createBuffer();
		geometryGroup.__webglUV2Buffer = _gl.createBuffer();

		geometryGroup.__webglSkinIndicesBuffer = _gl.createBuffer();
		geometryGroup.__webglSkinWeightsBuffer = _gl.createBuffer();

		geometryGroup.__webglFaceBuffer = _gl.createBuffer();
		geometryGroup.__webglLineBuffer = _gl.createBuffer();

		var m, ml;

		if ( geometryGroup.numMorphTargets ) {

			geometryGroup.__webglMorphTargetsBuffers = [];

			for ( m = 0, ml = geometryGroup.numMorphTargets; m < ml; m ++ ) {

				geometryGroup.__webglMorphTargetsBuffers.push( _gl.createBuffer() );

			}

		}

		if ( geometryGroup.numMorphNormals ) {

			geometryGroup.__webglMorphNormalsBuffers = [];

			for ( m = 0, ml = geometryGroup.numMorphNormals; m < ml; m ++ ) {

				geometryGroup.__webglMorphNormalsBuffers.push( _gl.createBuffer() );

			}

		}

		_this.info.memory.geometries ++;

	};

	// Buffer deallocation

	function deleteParticleBuffers ( geometry ) {

		_gl.deleteBuffer( geometry.__webglVertexBuffer );
		_gl.deleteBuffer( geometry.__webglColorBuffer );

		deleteCustomAttributesBuffers( geometry );

		_this.info.memory.geometries --;

	};

	function deleteLineBuffers ( geometry ) {

		_gl.deleteBuffer( geometry.__webglVertexBuffer );
		_gl.deleteBuffer( geometry.__webglColorBuffer );
		_gl.deleteBuffer( geometry.__webglLineDistanceBuffer );

		deleteCustomAttributesBuffers( geometry );

		_this.info.memory.geometries --;

	};

	function deleteRibbonBuffers ( geometry ) {

		_gl.deleteBuffer( geometry.__webglVertexBuffer );
		_gl.deleteBuffer( geometry.__webglColorBuffer );
		_gl.deleteBuffer( geometry.__webglNormalBuffer );

		deleteCustomAttributesBuffers( geometry );

		_this.info.memory.geometries --;

	};

	function deleteMeshBuffers ( geometryGroup ) {

		_gl.deleteBuffer( geometryGroup.__webglVertexBuffer );
		_gl.deleteBuffer( geometryGroup.__webglNormalBuffer );
		_gl.deleteBuffer( geometryGroup.__webglTangentBuffer );
		_gl.deleteBuffer( geometryGroup.__webglColorBuffer );
		_gl.deleteBuffer( geometryGroup.__webglUVBuffer );
		_gl.deleteBuffer( geometryGroup.__webglUV2Buffer );

		_gl.deleteBuffer( geometryGroup.__webglSkinIndicesBuffer );
		_gl.deleteBuffer( geometryGroup.__webglSkinWeightsBuffer );

		_gl.deleteBuffer( geometryGroup.__webglFaceBuffer );
		_gl.deleteBuffer( geometryGroup.__webglLineBuffer );

		var m, ml;

		if ( geometryGroup.numMorphTargets ) {

			for ( m = 0, ml = geometryGroup.numMorphTargets; m < ml; m ++ ) {

				_gl.deleteBuffer( geometryGroup.__webglMorphTargetsBuffers[ m ] );

			}

		}

		if ( geometryGroup.numMorphNormals ) {

			for ( m = 0, ml = geometryGroup.numMorphNormals; m < ml; m ++ ) {

				_gl.deleteBuffer( geometryGroup.__webglMorphNormalsBuffers[ m ] );

			}

		}

		deleteCustomAttributesBuffers( geometryGroup );

		_this.info.memory.geometries --;

	};

	function deleteCustomAttributesBuffers( geometry ) {

		if ( geometry.__webglCustomAttributesList ) {

			for ( var id in geometry.__webglCustomAttributesList ) {

				_gl.deleteBuffer( geometry.__webglCustomAttributesList[ id ].buffer );

			}

		}

	};

	// Buffer initialization

	function initCustomAttributes ( geometry, object ) {

		var nvertices = geometry.vertices.length;

		var material = object.material;

		if ( material.attributes ) {

			if ( geometry.__webglCustomAttributesList === undefined ) {

				geometry.__webglCustomAttributesList = [];

			}

			for ( var a in material.attributes ) {

				var attribute = material.attributes[ a ];

				if ( !attribute.__webglInitialized || attribute.createUniqueBuffers ) {

					attribute.__webglInitialized = true;

					var size = 1;		// "f" and "i"

					if ( attribute.type === "v2" ) size = 2;
					else if ( attribute.type === "v3" ) size = 3;
					else if ( attribute.type === "v4" ) size = 4;
					else if ( attribute.type === "c"  ) size = 3;

					attribute.size = size;

					attribute.array = new Float32Array( nvertices * size );

					attribute.buffer = _gl.createBuffer();
					attribute.buffer.belongsToAttribute = a;

					attribute.needsUpdate = true;

				}

				geometry.__webglCustomAttributesList.push( attribute );

			}

		}

	};

	function initParticleBuffers ( geometry, object ) {

		var nvertices = geometry.vertices.length;

		geometry.__vertexArray = new Float32Array( nvertices * 3 );
		geometry.__colorArray = new Float32Array( nvertices * 3 );

		geometry.__sortArray = [];

		geometry.__webglParticleCount = nvertices;

		initCustomAttributes ( geometry, object );

	};

	function initLineBuffers ( geometry, object ) {

		var nvertices = geometry.vertices.length;

		geometry.__vertexArray = new Float32Array( nvertices * 3 );
		geometry.__colorArray = new Float32Array( nvertices * 3 );
		geometry.__lineDistanceArray = new Float32Array( nvertices * 1 );

		geometry.__webglLineCount = nvertices;

		initCustomAttributes ( geometry, object );

	};

	function initRibbonBuffers ( geometry, object ) {

		var nvertices = geometry.vertices.length;

		geometry.__vertexArray = new Float32Array( nvertices * 3 );
		geometry.__colorArray = new Float32Array( nvertices * 3 );
		geometry.__normalArray = new Float32Array( nvertices * 3 );

		geometry.__webglVertexCount = nvertices;

		initCustomAttributes ( geometry, object );

	};

	function initMeshBuffers ( geometryGroup, object ) {

		var geometry = object.geometry,
			faces3 = geometryGroup.faces3,
			faces4 = geometryGroup.faces4,

			nvertices = faces3.length * 3 + faces4.length * 4,
			ntris     = faces3.length * 1 + faces4.length * 2,
			nlines    = faces3.length * 3 + faces4.length * 4,

			material = getBufferMaterial( object, geometryGroup ),

			uvType = bufferGuessUVType( material ),
			normalType = bufferGuessNormalType( material ),
			vertexColorType = bufferGuessVertexColorType( material );

		//console.log( "uvType", uvType, "normalType", normalType, "vertexColorType", vertexColorType, object, geometryGroup, material );

		geometryGroup.__vertexArray = new Float32Array( nvertices * 3 );

		if ( normalType ) {

			geometryGroup.__normalArray = new Float32Array( nvertices * 3 );

		}

		if ( geometry.hasTangents ) {

			geometryGroup.__tangentArray = new Float32Array( nvertices * 4 );

		}

		if ( vertexColorType ) {

			geometryGroup.__colorArray = new Float32Array( nvertices * 3 );

		}

		if ( uvType ) {

			if ( geometry.faceUvs.length > 0 || geometry.faceVertexUvs.length > 0 ) {

				geometryGroup.__uvArray = new Float32Array( nvertices * 2 );

			}

			if ( geometry.faceUvs.length > 1 || geometry.faceVertexUvs.length > 1 ) {

				geometryGroup.__uv2Array = new Float32Array( nvertices * 2 );

			}

		}

		if ( object.geometry.skinWeights.length && object.geometry.skinIndices.length ) {

			geometryGroup.__skinIndexArray = new Float32Array( nvertices * 4 );
			geometryGroup.__skinWeightArray = new Float32Array( nvertices * 4 );

		}

		geometryGroup.__faceArray = new Uint16Array( ntris * 3 );
		geometryGroup.__lineArray = new Uint16Array( nlines * 2 );

		var m, ml;

		if ( geometryGroup.numMorphTargets ) {

			geometryGroup.__morphTargetsArrays = [];

			for ( m = 0, ml = geometryGroup.numMorphTargets; m < ml; m ++ ) {

				geometryGroup.__morphTargetsArrays.push( new Float32Array( nvertices * 3 ) );

			}

		}

		if ( geometryGroup.numMorphNormals ) {

			geometryGroup.__morphNormalsArrays = [];

			for ( m = 0, ml = geometryGroup.numMorphNormals; m < ml; m ++ ) {

				geometryGroup.__morphNormalsArrays.push( new Float32Array( nvertices * 3 ) );

			}

		}

		geometryGroup.__webglFaceCount = ntris * 3;
		geometryGroup.__webglLineCount = nlines * 2;


		// custom attributes

		if ( material.attributes ) {

			if ( geometryGroup.__webglCustomAttributesList === undefined ) {

				geometryGroup.__webglCustomAttributesList = [];

			}

			for ( var a in material.attributes ) {

				// Do a shallow copy of the attribute object so different geometryGroup chunks use different
				// attribute buffers which are correctly indexed in the setMeshBuffers function

				var originalAttribute = material.attributes[ a ];

				var attribute = {};

				for ( var property in originalAttribute ) {

					attribute[ property ] = originalAttribute[ property ];

				}

				if ( !attribute.__webglInitialized || attribute.createUniqueBuffers ) {

					attribute.__webglInitialized = true;

					var size = 1;		// "f" and "i"

					if( attribute.type === "v2" ) size = 2;
					else if( attribute.type === "v3" ) size = 3;
					else if( attribute.type === "v4" ) size = 4;
					else if( attribute.type === "c"  ) size = 3;

					attribute.size = size;

					attribute.array = new Float32Array( nvertices * size );

					attribute.buffer = _gl.createBuffer();
					attribute.buffer.belongsToAttribute = a;

					originalAttribute.needsUpdate = true;
					attribute.__original = originalAttribute;

				}

				geometryGroup.__webglCustomAttributesList.push( attribute );

			}

		}

		geometryGroup.__inittedArrays = true;

	};

	function getBufferMaterial( object, geometryGroup ) {

		return object.material instanceof THREE.MeshFaceMaterial
			? object.material.materials[ geometryGroup.materialIndex ]
			: object.material;

	};

	function materialNeedsSmoothNormals ( material ) {

		return material && material.shading !== undefined && material.shading === THREE.SmoothShading;

	};

	function bufferGuessNormalType ( material ) {

		// only MeshBasicMaterial and MeshDepthMaterial don't need normals

		if ( ( material instanceof THREE.MeshBasicMaterial && !material.envMap ) || material instanceof THREE.MeshDepthMaterial ) {

			return false;

		}

		if ( materialNeedsSmoothNormals( material ) ) {

			return THREE.SmoothShading;

		} else {

			return THREE.FlatShading;

		}

	};

	function bufferGuessVertexColorType ( material ) {

		if ( material.vertexColors ) {

			return material.vertexColors;

		}

		return false;

	};

	function bufferGuessUVType ( material ) {

		// material must use some texture to require uvs

		if ( material.map || material.lightMap || material.bumpMap || material.normalMap || material.specularMap || material instanceof THREE.ShaderMaterial ) {

			return true;

		}

		return false;

	};

	//

	function initDirectBuffers( geometry ) {

		var a, attribute, type;

		for ( a in geometry.attributes ) {

			if ( a === "index" ) {

				type = _gl.ELEMENT_ARRAY_BUFFER;

			} else {

				type = _gl.ARRAY_BUFFER;

			}

			attribute = geometry.attributes[ a ];

			attribute.buffer = _gl.createBuffer();

			_gl.bindBuffer( type, attribute.buffer );
			_gl.bufferData( type, attribute.array, _gl.STATIC_DRAW );

		}

	};

	// Buffer setting

	function setParticleBuffers ( geometry, hint, object ) {

		var v, c, vertex, offset, index, color,

		vertices = geometry.vertices,
		vl = vertices.length,

		colors = geometry.colors,
		cl = colors.length,

		vertexArray = geometry.__vertexArray,
		colorArray = geometry.__colorArray,

		sortArray = geometry.__sortArray,

		dirtyVertices = geometry.verticesNeedUpdate,
		dirtyElements = geometry.elementsNeedUpdate,
		dirtyColors = geometry.colorsNeedUpdate,

		customAttributes = geometry.__webglCustomAttributesList,
		i, il,
		a, ca, cal, value,
		customAttribute;

		if ( object.sortParticles ) {

			_projScreenMatrixPS.copy( _projScreenMatrix );
			_projScreenMatrixPS.multiplySelf( object.matrixWorld );

			for ( v = 0; v < vl; v ++ ) {

				vertex = vertices[ v ];

				_vector3.copy( vertex );
				_projScreenMatrixPS.multiplyVector3( _vector3 );

				sortArray[ v ] = [ _vector3.z, v ];

			}

			sortArray.sort( function( a, b ) { return b[ 0 ] - a[ 0 ]; } );

			for ( v = 0; v < vl; v ++ ) {

				vertex = vertices[ sortArray[v][1] ];

				offset = v * 3;

				vertexArray[ offset ]     = vertex.x;
				vertexArray[ offset + 1 ] = vertex.y;
				vertexArray[ offset + 2 ] = vertex.z;

			}

			for ( c = 0; c < cl; c ++ ) {

				offset = c * 3;

				color = colors[ sortArray[c][1] ];

				colorArray[ offset ]     = color.r;
				colorArray[ offset + 1 ] = color.g;
				colorArray[ offset + 2 ] = color.b;

			}

			if ( customAttributes ) {

				for ( i = 0, il = customAttributes.length; i < il; i ++ ) {

					customAttribute = customAttributes[ i ];

					if ( ! ( customAttribute.boundTo === undefined || customAttribute.boundTo === "vertices" ) ) continue;

					offset = 0;

					cal = customAttribute.value.length;

					if ( customAttribute.size === 1 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							index = sortArray[ ca ][ 1 ];

							customAttribute.array[ ca ] = customAttribute.value[ index ];

						}

					} else if ( customAttribute.size === 2 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							index = sortArray[ ca ][ 1 ];

							value = customAttribute.value[ index ];

							customAttribute.array[ offset ] 	= value.x;
							customAttribute.array[ offset + 1 ] = value.y;

							offset += 2;

						}

					} else if ( customAttribute.size === 3 ) {

						if ( customAttribute.type === "c" ) {

							for ( ca = 0; ca < cal; ca ++ ) {

								index = sortArray[ ca ][ 1 ];

								value = customAttribute.value[ index ];

								customAttribute.array[ offset ]     = value.r;
								customAttribute.array[ offset + 1 ] = value.g;
								customAttribute.array[ offset + 2 ] = value.b;

								offset += 3;

							}

						} else {

							for ( ca = 0; ca < cal; ca ++ ) {

								index = sortArray[ ca ][ 1 ];

								value = customAttribute.value[ index ];

								customAttribute.array[ offset ] 	= value.x;
								customAttribute.array[ offset + 1 ] = value.y;
								customAttribute.array[ offset + 2 ] = value.z;

								offset += 3;

							}

						}

					} else if ( customAttribute.size === 4 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							index = sortArray[ ca ][ 1 ];

							value = customAttribute.value[ index ];

							customAttribute.array[ offset ]      = value.x;
							customAttribute.array[ offset + 1  ] = value.y;
							customAttribute.array[ offset + 2  ] = value.z;
							customAttribute.array[ offset + 3  ] = value.w;

							offset += 4;

						}

					}

				}

			}

		} else {

			if ( dirtyVertices ) {

				for ( v = 0; v < vl; v ++ ) {

					vertex = vertices[ v ];

					offset = v * 3;

					vertexArray[ offset ]     = vertex.x;
					vertexArray[ offset + 1 ] = vertex.y;
					vertexArray[ offset + 2 ] = vertex.z;

				}

			}

			if ( dirtyColors ) {

				for ( c = 0; c < cl; c ++ ) {

					color = colors[ c ];

					offset = c * 3;

					colorArray[ offset ]     = color.r;
					colorArray[ offset + 1 ] = color.g;
					colorArray[ offset + 2 ] = color.b;

				}

			}

			if ( customAttributes ) {

				for ( i = 0, il = customAttributes.length; i < il; i ++ ) {

					customAttribute = customAttributes[ i ];

					if ( customAttribute.needsUpdate &&
						 ( customAttribute.boundTo === undefined ||
						   customAttribute.boundTo === "vertices") ) {

						cal = customAttribute.value.length;

						offset = 0;

						if ( customAttribute.size === 1 ) {

							for ( ca = 0; ca < cal; ca ++ ) {

								customAttribute.array[ ca ] = customAttribute.value[ ca ];

							}

						} else if ( customAttribute.size === 2 ) {

							for ( ca = 0; ca < cal; ca ++ ) {

								value = customAttribute.value[ ca ];

								customAttribute.array[ offset ] 	= value.x;
								customAttribute.array[ offset + 1 ] = value.y;

								offset += 2;

							}

						} else if ( customAttribute.size === 3 ) {

							if ( customAttribute.type === "c" ) {

								for ( ca = 0; ca < cal; ca ++ ) {

									value = customAttribute.value[ ca ];

									customAttribute.array[ offset ] 	= value.r;
									customAttribute.array[ offset + 1 ] = value.g;
									customAttribute.array[ offset + 2 ] = value.b;

									offset += 3;

								}

							} else {

								for ( ca = 0; ca < cal; ca ++ ) {

									value = customAttribute.value[ ca ];

									customAttribute.array[ offset ] 	= value.x;
									customAttribute.array[ offset + 1 ] = value.y;
									customAttribute.array[ offset + 2 ] = value.z;

									offset += 3;

								}

							}

						} else if ( customAttribute.size === 4 ) {

							for ( ca = 0; ca < cal; ca ++ ) {

								value = customAttribute.value[ ca ];

								customAttribute.array[ offset ]      = value.x;
								customAttribute.array[ offset + 1  ] = value.y;
								customAttribute.array[ offset + 2  ] = value.z;
								customAttribute.array[ offset + 3  ] = value.w;

								offset += 4;

							}

						}

					}

				}

			}

		}

		if ( dirtyVertices || object.sortParticles ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometry.__webglVertexBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, vertexArray, hint );

		}

		if ( dirtyColors || object.sortParticles ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometry.__webglColorBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, colorArray, hint );

		}

		if ( customAttributes ) {

			for ( i = 0, il = customAttributes.length; i < il; i ++ ) {

				customAttribute = customAttributes[ i ];

				if ( customAttribute.needsUpdate || object.sortParticles ) {

					_gl.bindBuffer( _gl.ARRAY_BUFFER, customAttribute.buffer );
					_gl.bufferData( _gl.ARRAY_BUFFER, customAttribute.array, hint );

				}

			}

		}


	};

	function setLineBuffers ( geometry, hint ) {

		var v, c, d, vertex, offset, color,

		vertices = geometry.vertices,
		colors = geometry.colors,
		lineDistances = geometry.lineDistances,

		vl = vertices.length,
		cl = colors.length,
		dl = lineDistances.length,

		vertexArray = geometry.__vertexArray,
		colorArray = geometry.__colorArray,
		lineDistanceArray = geometry.__lineDistanceArray,

		dirtyVertices = geometry.verticesNeedUpdate,
		dirtyColors = geometry.colorsNeedUpdate,
		dirtyLineDistances = geometry.lineDistancesNeedUpdate,

		customAttributes = geometry.__webglCustomAttributesList,

		i, il,
		a, ca, cal, value,
		customAttribute;

		if ( dirtyVertices ) {

			for ( v = 0; v < vl; v ++ ) {

				vertex = vertices[ v ];

				offset = v * 3;

				vertexArray[ offset ]     = vertex.x;
				vertexArray[ offset + 1 ] = vertex.y;
				vertexArray[ offset + 2 ] = vertex.z;

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometry.__webglVertexBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, vertexArray, hint );

		}

		if ( dirtyColors ) {

			for ( c = 0; c < cl; c ++ ) {

				color = colors[ c ];

				offset = c * 3;

				colorArray[ offset ]     = color.r;
				colorArray[ offset + 1 ] = color.g;
				colorArray[ offset + 2 ] = color.b;

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometry.__webglColorBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, colorArray, hint );

		}

		if ( dirtyLineDistances ) {

			for ( d = 0; d < dl; d ++ ) {

				lineDistanceArray[ d ] = lineDistances[ d ];

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometry.__webglLineDistanceBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, lineDistanceArray, hint );

		}

		if ( customAttributes ) {

			for ( i = 0, il = customAttributes.length; i < il; i ++ ) {

				customAttribute = customAttributes[ i ];

				if ( customAttribute.needsUpdate &&
					 ( customAttribute.boundTo === undefined ||
					   customAttribute.boundTo === "vertices" ) ) {

					offset = 0;

					cal = customAttribute.value.length;

					if ( customAttribute.size === 1 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							customAttribute.array[ ca ] = customAttribute.value[ ca ];

						}

					} else if ( customAttribute.size === 2 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							value = customAttribute.value[ ca ];

							customAttribute.array[ offset ] 	= value.x;
							customAttribute.array[ offset + 1 ] = value.y;

							offset += 2;

						}

					} else if ( customAttribute.size === 3 ) {

						if ( customAttribute.type === "c" ) {

							for ( ca = 0; ca < cal; ca ++ ) {

								value = customAttribute.value[ ca ];

								customAttribute.array[ offset ] 	= value.r;
								customAttribute.array[ offset + 1 ] = value.g;
								customAttribute.array[ offset + 2 ] = value.b;

								offset += 3;

							}

						} else {

							for ( ca = 0; ca < cal; ca ++ ) {

								value = customAttribute.value[ ca ];

								customAttribute.array[ offset ] 	= value.x;
								customAttribute.array[ offset + 1 ] = value.y;
								customAttribute.array[ offset + 2 ] = value.z;

								offset += 3;

							}

						}

					} else if ( customAttribute.size === 4 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							value = customAttribute.value[ ca ];

							customAttribute.array[ offset ] 	 = value.x;
							customAttribute.array[ offset + 1  ] = value.y;
							customAttribute.array[ offset + 2  ] = value.z;
							customAttribute.array[ offset + 3  ] = value.w;

							offset += 4;

						}

					}

					_gl.bindBuffer( _gl.ARRAY_BUFFER, customAttribute.buffer );
					_gl.bufferData( _gl.ARRAY_BUFFER, customAttribute.array, hint );

				}

			}

		}

	};

	function setRibbonBuffers ( geometry, hint ) {

		var v, c, n, vertex, offset, color, normal,

		i, il, ca, cal, customAttribute, value,

		vertices = geometry.vertices,
		colors = geometry.colors,
		normals = geometry.normals,

		vl = vertices.length,
		cl = colors.length,
		nl = normals.length,

		vertexArray = geometry.__vertexArray,
		colorArray = geometry.__colorArray,
		normalArray = geometry.__normalArray,

		dirtyVertices = geometry.verticesNeedUpdate,
		dirtyColors = geometry.colorsNeedUpdate,
		dirtyNormals = geometry.normalsNeedUpdate,

		customAttributes = geometry.__webglCustomAttributesList;

		if ( dirtyVertices ) {

			for ( v = 0; v < vl; v ++ ) {

				vertex = vertices[ v ];

				offset = v * 3;

				vertexArray[ offset ]     = vertex.x;
				vertexArray[ offset + 1 ] = vertex.y;
				vertexArray[ offset + 2 ] = vertex.z;

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometry.__webglVertexBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, vertexArray, hint );

		}

		if ( dirtyColors ) {

			for ( c = 0; c < cl; c ++ ) {

				color = colors[ c ];

				offset = c * 3;

				colorArray[ offset ]     = color.r;
				colorArray[ offset + 1 ] = color.g;
				colorArray[ offset + 2 ] = color.b;

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometry.__webglColorBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, colorArray, hint );

		}

		if ( dirtyNormals ) {

			for ( n = 0; n < nl; n ++ ) {

				normal = normals[ n ];

				offset = n * 3;

				normalArray[ offset ]     = normal.x;
				normalArray[ offset + 1 ] = normal.y;
				normalArray[ offset + 2 ] = normal.z;

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometry.__webglNormalBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, normalArray, hint );

		}

		if ( customAttributes ) {

			for ( i = 0, il = customAttributes.length; i < il; i ++ ) {

				customAttribute = customAttributes[ i ];

				if ( customAttribute.needsUpdate &&
					 ( customAttribute.boundTo === undefined ||
					   customAttribute.boundTo === "vertices" ) ) {

					offset = 0;

					cal = customAttribute.value.length;

					if ( customAttribute.size === 1 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							customAttribute.array[ ca ] = customAttribute.value[ ca ];

						}

					} else if ( customAttribute.size === 2 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							value = customAttribute.value[ ca ];

							customAttribute.array[ offset ] 	= value.x;
							customAttribute.array[ offset + 1 ] = value.y;

							offset += 2;

						}

					} else if ( customAttribute.size === 3 ) {

						if ( customAttribute.type === "c" ) {

							for ( ca = 0; ca < cal; ca ++ ) {

								value = customAttribute.value[ ca ];

								customAttribute.array[ offset ] 	= value.r;
								customAttribute.array[ offset + 1 ] = value.g;
								customAttribute.array[ offset + 2 ] = value.b;

								offset += 3;

							}

						} else {

							for ( ca = 0; ca < cal; ca ++ ) {

								value = customAttribute.value[ ca ];

								customAttribute.array[ offset ] 	= value.x;
								customAttribute.array[ offset + 1 ] = value.y;
								customAttribute.array[ offset + 2 ] = value.z;

								offset += 3;

							}

						}

					} else if ( customAttribute.size === 4 ) {

						for ( ca = 0; ca < cal; ca ++ ) {

							value = customAttribute.value[ ca ];

							customAttribute.array[ offset ] 	 = value.x;
							customAttribute.array[ offset + 1  ] = value.y;
							customAttribute.array[ offset + 2  ] = value.z;
							customAttribute.array[ offset + 3  ] = value.w;

							offset += 4;

						}

					}

					_gl.bindBuffer( _gl.ARRAY_BUFFER, customAttribute.buffer );
					_gl.bufferData( _gl.ARRAY_BUFFER, customAttribute.array, hint );

				}

			}

		}

	};

	function setMeshBuffers( geometryGroup, object, hint, dispose, material ) {

		if ( ! geometryGroup.__inittedArrays ) {

			return;

		}

		var normalType = bufferGuessNormalType( material ),
		vertexColorType = bufferGuessVertexColorType( material ),
		uvType = bufferGuessUVType( material ),

		needsSmoothNormals = ( normalType === THREE.SmoothShading );

		var f, fl, fi, face,
		vertexNormals, faceNormal, normal,
		vertexColors, faceColor,
		vertexTangents,
		uv, uv2, v1, v2, v3, v4, t1, t2, t3, t4, n1, n2, n3, n4,
		c1, c2, c3, c4,
		sw1, sw2, sw3, sw4,
		si1, si2, si3, si4,
		sa1, sa2, sa3, sa4,
		sb1, sb2, sb3, sb4,
		m, ml, i, il,
		vn, uvi, uv2i,
		vk, vkl, vka,
		nka, chf, faceVertexNormals,
		a,

		vertexIndex = 0,

		offset = 0,
		offset_uv = 0,
		offset_uv2 = 0,
		offset_face = 0,
		offset_normal = 0,
		offset_tangent = 0,
		offset_line = 0,
		offset_color = 0,
		offset_skin = 0,
		offset_morphTarget = 0,
		offset_custom = 0,
		offset_customSrc = 0,

		value,

		vertexArray = geometryGroup.__vertexArray,
		uvArray = geometryGroup.__uvArray,
		uv2Array = geometryGroup.__uv2Array,
		normalArray = geometryGroup.__normalArray,
		tangentArray = geometryGroup.__tangentArray,
		colorArray = geometryGroup.__colorArray,

		skinIndexArray = geometryGroup.__skinIndexArray,
		skinWeightArray = geometryGroup.__skinWeightArray,

		morphTargetsArrays = geometryGroup.__morphTargetsArrays,
		morphNormalsArrays = geometryGroup.__morphNormalsArrays,

		customAttributes = geometryGroup.__webglCustomAttributesList,
		customAttribute,

		faceArray = geometryGroup.__faceArray,
		lineArray = geometryGroup.__lineArray,

		geometry = object.geometry, // this is shared for all chunks

		dirtyVertices = geometry.verticesNeedUpdate,
		dirtyElements = geometry.elementsNeedUpdate,
		dirtyUvs = geometry.uvsNeedUpdate,
		dirtyNormals = geometry.normalsNeedUpdate,
		dirtyTangents = geometry.tangentsNeedUpdate,
		dirtyColors = geometry.colorsNeedUpdate,
		dirtyMorphTargets = geometry.morphTargetsNeedUpdate,

		vertices = geometry.vertices,
		chunk_faces3 = geometryGroup.faces3,
		chunk_faces4 = geometryGroup.faces4,
		obj_faces = geometry.faces,

		obj_uvs  = geometry.faceVertexUvs[ 0 ],
		obj_uvs2 = geometry.faceVertexUvs[ 1 ],

		obj_colors = geometry.colors,

		obj_skinIndices = geometry.skinIndices,
		obj_skinWeights = geometry.skinWeights,

		morphTargets = geometry.morphTargets,
		morphNormals = geometry.morphNormals;

		if ( dirtyVertices ) {

			for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces3[ f ] ];

				v1 = vertices[ face.a ];
				v2 = vertices[ face.b ];
				v3 = vertices[ face.c ];

				vertexArray[ offset ]     = v1.x;
				vertexArray[ offset + 1 ] = v1.y;
				vertexArray[ offset + 2 ] = v1.z;

				vertexArray[ offset + 3 ] = v2.x;
				vertexArray[ offset + 4 ] = v2.y;
				vertexArray[ offset + 5 ] = v2.z;

				vertexArray[ offset + 6 ] = v3.x;
				vertexArray[ offset + 7 ] = v3.y;
				vertexArray[ offset + 8 ] = v3.z;

				offset += 9;

			}

			for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces4[ f ] ];

				v1 = vertices[ face.a ];
				v2 = vertices[ face.b ];
				v3 = vertices[ face.c ];
				v4 = vertices[ face.d ];

				vertexArray[ offset ]     = v1.x;
				vertexArray[ offset + 1 ] = v1.y;
				vertexArray[ offset + 2 ] = v1.z;

				vertexArray[ offset + 3 ] = v2.x;
				vertexArray[ offset + 4 ] = v2.y;
				vertexArray[ offset + 5 ] = v2.z;

				vertexArray[ offset + 6 ] = v3.x;
				vertexArray[ offset + 7 ] = v3.y;
				vertexArray[ offset + 8 ] = v3.z;

				vertexArray[ offset + 9 ]  = v4.x;
				vertexArray[ offset + 10 ] = v4.y;
				vertexArray[ offset + 11 ] = v4.z;

				offset += 12;

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglVertexBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, vertexArray, hint );

		}

		if ( dirtyMorphTargets ) {

			for ( vk = 0, vkl = morphTargets.length; vk < vkl; vk ++ ) {

				offset_morphTarget = 0;

				for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

					chf = chunk_faces3[ f ];
					face = obj_faces[ chf ];

					// morph positions

					v1 = morphTargets[ vk ].vertices[ face.a ];
					v2 = morphTargets[ vk ].vertices[ face.b ];
					v3 = morphTargets[ vk ].vertices[ face.c ];

					vka = morphTargetsArrays[ vk ];

					vka[ offset_morphTarget ] 	  = v1.x;
					vka[ offset_morphTarget + 1 ] = v1.y;
					vka[ offset_morphTarget + 2 ] = v1.z;

					vka[ offset_morphTarget + 3 ] = v2.x;
					vka[ offset_morphTarget + 4 ] = v2.y;
					vka[ offset_morphTarget + 5 ] = v2.z;

					vka[ offset_morphTarget + 6 ] = v3.x;
					vka[ offset_morphTarget + 7 ] = v3.y;
					vka[ offset_morphTarget + 8 ] = v3.z;

					// morph normals

					if ( material.morphNormals ) {

						if ( needsSmoothNormals ) {

							faceVertexNormals = morphNormals[ vk ].vertexNormals[ chf ];

							n1 = faceVertexNormals.a;
							n2 = faceVertexNormals.b;
							n3 = faceVertexNormals.c;

						} else {

							n1 = morphNormals[ vk ].faceNormals[ chf ];
							n2 = n1;
							n3 = n1;

						}

						nka = morphNormalsArrays[ vk ];

						nka[ offset_morphTarget ] 	  = n1.x;
						nka[ offset_morphTarget + 1 ] = n1.y;
						nka[ offset_morphTarget + 2 ] = n1.z;

						nka[ offset_morphTarget + 3 ] = n2.x;
						nka[ offset_morphTarget + 4 ] = n2.y;
						nka[ offset_morphTarget + 5 ] = n2.z;

						nka[ offset_morphTarget + 6 ] = n3.x;
						nka[ offset_morphTarget + 7 ] = n3.y;
						nka[ offset_morphTarget + 8 ] = n3.z;

					}

					//

					offset_morphTarget += 9;

				}

				for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

					chf = chunk_faces4[ f ];
					face = obj_faces[ chf ];

					// morph positions

					v1 = morphTargets[ vk ].vertices[ face.a ];
					v2 = morphTargets[ vk ].vertices[ face.b ];
					v3 = morphTargets[ vk ].vertices[ face.c ];
					v4 = morphTargets[ vk ].vertices[ face.d ];

					vka = morphTargetsArrays[ vk ];

					vka[ offset_morphTarget ] 	  = v1.x;
					vka[ offset_morphTarget + 1 ] = v1.y;
					vka[ offset_morphTarget + 2 ] = v1.z;

					vka[ offset_morphTarget + 3 ] = v2.x;
					vka[ offset_morphTarget + 4 ] = v2.y;
					vka[ offset_morphTarget + 5 ] = v2.z;

					vka[ offset_morphTarget + 6 ] = v3.x;
					vka[ offset_morphTarget + 7 ] = v3.y;
					vka[ offset_morphTarget + 8 ] = v3.z;

					vka[ offset_morphTarget + 9 ]  = v4.x;
					vka[ offset_morphTarget + 10 ] = v4.y;
					vka[ offset_morphTarget + 11 ] = v4.z;

					// morph normals

					if ( material.morphNormals ) {

						if ( needsSmoothNormals ) {

							faceVertexNormals = morphNormals[ vk ].vertexNormals[ chf ];

							n1 = faceVertexNormals.a;
							n2 = faceVertexNormals.b;
							n3 = faceVertexNormals.c;
							n4 = faceVertexNormals.d;

						} else {

							n1 = morphNormals[ vk ].faceNormals[ chf ];
							n2 = n1;
							n3 = n1;
							n4 = n1;

						}

						nka = morphNormalsArrays[ vk ];

						nka[ offset_morphTarget ] 	  = n1.x;
						nka[ offset_morphTarget + 1 ] = n1.y;
						nka[ offset_morphTarget + 2 ] = n1.z;

						nka[ offset_morphTarget + 3 ] = n2.x;
						nka[ offset_morphTarget + 4 ] = n2.y;
						nka[ offset_morphTarget + 5 ] = n2.z;

						nka[ offset_morphTarget + 6 ] = n3.x;
						nka[ offset_morphTarget + 7 ] = n3.y;
						nka[ offset_morphTarget + 8 ] = n3.z;

						nka[ offset_morphTarget + 9 ]  = n4.x;
						nka[ offset_morphTarget + 10 ] = n4.y;
						nka[ offset_morphTarget + 11 ] = n4.z;

					}

					//

					offset_morphTarget += 12;

				}

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglMorphTargetsBuffers[ vk ] );
				_gl.bufferData( _gl.ARRAY_BUFFER, morphTargetsArrays[ vk ], hint );

				if ( material.morphNormals ) {

					_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglMorphNormalsBuffers[ vk ] );
					_gl.bufferData( _gl.ARRAY_BUFFER, morphNormalsArrays[ vk ], hint );

				}

			}

		}

		if ( obj_skinWeights.length ) {

			for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces3[ f ]	];

				// weights

				sw1 = obj_skinWeights[ face.a ];
				sw2 = obj_skinWeights[ face.b ];
				sw3 = obj_skinWeights[ face.c ];

				skinWeightArray[ offset_skin ]     = sw1.x;
				skinWeightArray[ offset_skin + 1 ] = sw1.y;
				skinWeightArray[ offset_skin + 2 ] = sw1.z;
				skinWeightArray[ offset_skin + 3 ] = sw1.w;

				skinWeightArray[ offset_skin + 4 ] = sw2.x;
				skinWeightArray[ offset_skin + 5 ] = sw2.y;
				skinWeightArray[ offset_skin + 6 ] = sw2.z;
				skinWeightArray[ offset_skin + 7 ] = sw2.w;

				skinWeightArray[ offset_skin + 8 ]  = sw3.x;
				skinWeightArray[ offset_skin + 9 ]  = sw3.y;
				skinWeightArray[ offset_skin + 10 ] = sw3.z;
				skinWeightArray[ offset_skin + 11 ] = sw3.w;

				// indices

				si1 = obj_skinIndices[ face.a ];
				si2 = obj_skinIndices[ face.b ];
				si3 = obj_skinIndices[ face.c ];

				skinIndexArray[ offset_skin ]     = si1.x;
				skinIndexArray[ offset_skin + 1 ] = si1.y;
				skinIndexArray[ offset_skin + 2 ] = si1.z;
				skinIndexArray[ offset_skin + 3 ] = si1.w;

				skinIndexArray[ offset_skin + 4 ] = si2.x;
				skinIndexArray[ offset_skin + 5 ] = si2.y;
				skinIndexArray[ offset_skin + 6 ] = si2.z;
				skinIndexArray[ offset_skin + 7 ] = si2.w;

				skinIndexArray[ offset_skin + 8 ]  = si3.x;
				skinIndexArray[ offset_skin + 9 ]  = si3.y;
				skinIndexArray[ offset_skin + 10 ] = si3.z;
				skinIndexArray[ offset_skin + 11 ] = si3.w;

				offset_skin += 12;

			}

			for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces4[ f ] ];

				// weights

				sw1 = obj_skinWeights[ face.a ];
				sw2 = obj_skinWeights[ face.b ];
				sw3 = obj_skinWeights[ face.c ];
				sw4 = obj_skinWeights[ face.d ];

				skinWeightArray[ offset_skin ]     = sw1.x;
				skinWeightArray[ offset_skin + 1 ] = sw1.y;
				skinWeightArray[ offset_skin + 2 ] = sw1.z;
				skinWeightArray[ offset_skin + 3 ] = sw1.w;

				skinWeightArray[ offset_skin + 4 ] = sw2.x;
				skinWeightArray[ offset_skin + 5 ] = sw2.y;
				skinWeightArray[ offset_skin + 6 ] = sw2.z;
				skinWeightArray[ offset_skin + 7 ] = sw2.w;

				skinWeightArray[ offset_skin + 8 ]  = sw3.x;
				skinWeightArray[ offset_skin + 9 ]  = sw3.y;
				skinWeightArray[ offset_skin + 10 ] = sw3.z;
				skinWeightArray[ offset_skin + 11 ] = sw3.w;

				skinWeightArray[ offset_skin + 12 ] = sw4.x;
				skinWeightArray[ offset_skin + 13 ] = sw4.y;
				skinWeightArray[ offset_skin + 14 ] = sw4.z;
				skinWeightArray[ offset_skin + 15 ] = sw4.w;

				// indices

				si1 = obj_skinIndices[ face.a ];
				si2 = obj_skinIndices[ face.b ];
				si3 = obj_skinIndices[ face.c ];
				si4 = obj_skinIndices[ face.d ];

				skinIndexArray[ offset_skin ]     = si1.x;
				skinIndexArray[ offset_skin + 1 ] = si1.y;
				skinIndexArray[ offset_skin + 2 ] = si1.z;
				skinIndexArray[ offset_skin + 3 ] = si1.w;

				skinIndexArray[ offset_skin + 4 ] = si2.x;
				skinIndexArray[ offset_skin + 5 ] = si2.y;
				skinIndexArray[ offset_skin + 6 ] = si2.z;
				skinIndexArray[ offset_skin + 7 ] = si2.w;

				skinIndexArray[ offset_skin + 8 ]  = si3.x;
				skinIndexArray[ offset_skin + 9 ]  = si3.y;
				skinIndexArray[ offset_skin + 10 ] = si3.z;
				skinIndexArray[ offset_skin + 11 ] = si3.w;

				skinIndexArray[ offset_skin + 12 ] = si4.x;
				skinIndexArray[ offset_skin + 13 ] = si4.y;
				skinIndexArray[ offset_skin + 14 ] = si4.z;
				skinIndexArray[ offset_skin + 15 ] = si4.w;

				offset_skin += 16;

			}

			if ( offset_skin > 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglSkinIndicesBuffer );
				_gl.bufferData( _gl.ARRAY_BUFFER, skinIndexArray, hint );

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglSkinWeightsBuffer );
				_gl.bufferData( _gl.ARRAY_BUFFER, skinWeightArray, hint );

			}

		}

		if ( dirtyColors && vertexColorType ) {

			for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces3[ f ]	];

				vertexColors = face.vertexColors;
				faceColor = face.color;

				if ( vertexColors.length === 3 && vertexColorType === THREE.VertexColors ) {

					c1 = vertexColors[ 0 ];
					c2 = vertexColors[ 1 ];
					c3 = vertexColors[ 2 ];

				} else {

					c1 = faceColor;
					c2 = faceColor;
					c3 = faceColor;

				}

				colorArray[ offset_color ]     = c1.r;
				colorArray[ offset_color + 1 ] = c1.g;
				colorArray[ offset_color + 2 ] = c1.b;

				colorArray[ offset_color + 3 ] = c2.r;
				colorArray[ offset_color + 4 ] = c2.g;
				colorArray[ offset_color + 5 ] = c2.b;

				colorArray[ offset_color + 6 ] = c3.r;
				colorArray[ offset_color + 7 ] = c3.g;
				colorArray[ offset_color + 8 ] = c3.b;

				offset_color += 9;

			}

			for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces4[ f ] ];

				vertexColors = face.vertexColors;
				faceColor = face.color;

				if ( vertexColors.length === 4 && vertexColorType === THREE.VertexColors ) {

					c1 = vertexColors[ 0 ];
					c2 = vertexColors[ 1 ];
					c3 = vertexColors[ 2 ];
					c4 = vertexColors[ 3 ];

				} else {

					c1 = faceColor;
					c2 = faceColor;
					c3 = faceColor;
					c4 = faceColor;

				}

				colorArray[ offset_color ]     = c1.r;
				colorArray[ offset_color + 1 ] = c1.g;
				colorArray[ offset_color + 2 ] = c1.b;

				colorArray[ offset_color + 3 ] = c2.r;
				colorArray[ offset_color + 4 ] = c2.g;
				colorArray[ offset_color + 5 ] = c2.b;

				colorArray[ offset_color + 6 ] = c3.r;
				colorArray[ offset_color + 7 ] = c3.g;
				colorArray[ offset_color + 8 ] = c3.b;

				colorArray[ offset_color + 9 ]  = c4.r;
				colorArray[ offset_color + 10 ] = c4.g;
				colorArray[ offset_color + 11 ] = c4.b;

				offset_color += 12;

			}

			if ( offset_color > 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglColorBuffer );
				_gl.bufferData( _gl.ARRAY_BUFFER, colorArray, hint );

			}

		}

		if ( dirtyTangents && geometry.hasTangents ) {

			for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces3[ f ]	];

				vertexTangents = face.vertexTangents;

				t1 = vertexTangents[ 0 ];
				t2 = vertexTangents[ 1 ];
				t3 = vertexTangents[ 2 ];

				tangentArray[ offset_tangent ]     = t1.x;
				tangentArray[ offset_tangent + 1 ] = t1.y;
				tangentArray[ offset_tangent + 2 ] = t1.z;
				tangentArray[ offset_tangent + 3 ] = t1.w;

				tangentArray[ offset_tangent + 4 ] = t2.x;
				tangentArray[ offset_tangent + 5 ] = t2.y;
				tangentArray[ offset_tangent + 6 ] = t2.z;
				tangentArray[ offset_tangent + 7 ] = t2.w;

				tangentArray[ offset_tangent + 8 ]  = t3.x;
				tangentArray[ offset_tangent + 9 ]  = t3.y;
				tangentArray[ offset_tangent + 10 ] = t3.z;
				tangentArray[ offset_tangent + 11 ] = t3.w;

				offset_tangent += 12;

			}

			for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces4[ f ] ];

				vertexTangents = face.vertexTangents;

				t1 = vertexTangents[ 0 ];
				t2 = vertexTangents[ 1 ];
				t3 = vertexTangents[ 2 ];
				t4 = vertexTangents[ 3 ];

				tangentArray[ offset_tangent ]     = t1.x;
				tangentArray[ offset_tangent + 1 ] = t1.y;
				tangentArray[ offset_tangent + 2 ] = t1.z;
				tangentArray[ offset_tangent + 3 ] = t1.w;

				tangentArray[ offset_tangent + 4 ] = t2.x;
				tangentArray[ offset_tangent + 5 ] = t2.y;
				tangentArray[ offset_tangent + 6 ] = t2.z;
				tangentArray[ offset_tangent + 7 ] = t2.w;

				tangentArray[ offset_tangent + 8 ]  = t3.x;
				tangentArray[ offset_tangent + 9 ]  = t3.y;
				tangentArray[ offset_tangent + 10 ] = t3.z;
				tangentArray[ offset_tangent + 11 ] = t3.w;

				tangentArray[ offset_tangent + 12 ] = t4.x;
				tangentArray[ offset_tangent + 13 ] = t4.y;
				tangentArray[ offset_tangent + 14 ] = t4.z;
				tangentArray[ offset_tangent + 15 ] = t4.w;

				offset_tangent += 16;

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglTangentBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, tangentArray, hint );

		}

		if ( dirtyNormals && normalType ) {

			for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces3[ f ]	];

				vertexNormals = face.vertexNormals;
				faceNormal = face.normal;

				if ( vertexNormals.length === 3 && needsSmoothNormals ) {

					for ( i = 0; i < 3; i ++ ) {

						vn = vertexNormals[ i ];

						normalArray[ offset_normal ]     = vn.x;
						normalArray[ offset_normal + 1 ] = vn.y;
						normalArray[ offset_normal + 2 ] = vn.z;

						offset_normal += 3;

					}

				} else {

					for ( i = 0; i < 3; i ++ ) {

						normalArray[ offset_normal ]     = faceNormal.x;
						normalArray[ offset_normal + 1 ] = faceNormal.y;
						normalArray[ offset_normal + 2 ] = faceNormal.z;

						offset_normal += 3;

					}

				}

			}

			for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

				face = obj_faces[ chunk_faces4[ f ] ];

				vertexNormals = face.vertexNormals;
				faceNormal = face.normal;

				if ( vertexNormals.length === 4 && needsSmoothNormals ) {

					for ( i = 0; i < 4; i ++ ) {

						vn = vertexNormals[ i ];

						normalArray[ offset_normal ]     = vn.x;
						normalArray[ offset_normal + 1 ] = vn.y;
						normalArray[ offset_normal + 2 ] = vn.z;

						offset_normal += 3;

					}

				} else {

					for ( i = 0; i < 4; i ++ ) {

						normalArray[ offset_normal ]     = faceNormal.x;
						normalArray[ offset_normal + 1 ] = faceNormal.y;
						normalArray[ offset_normal + 2 ] = faceNormal.z;

						offset_normal += 3;

					}

				}

			}

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglNormalBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, normalArray, hint );

		}

		if ( dirtyUvs && obj_uvs && uvType ) {

			for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

				fi = chunk_faces3[ f ];

				uv = obj_uvs[ fi ];

				if ( uv === undefined ) continue;

				for ( i = 0; i < 3; i ++ ) {

					uvi = uv[ i ];

					uvArray[ offset_uv ]     = uvi.u;
					uvArray[ offset_uv + 1 ] = uvi.v;

					offset_uv += 2;

				}

			}

			for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

				fi = chunk_faces4[ f ];

				uv = obj_uvs[ fi ];

				if ( uv === undefined ) continue;

				for ( i = 0; i < 4; i ++ ) {

					uvi = uv[ i ];

					uvArray[ offset_uv ]     = uvi.u;
					uvArray[ offset_uv + 1 ] = uvi.v;

					offset_uv += 2;

				}

			}

			if ( offset_uv > 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglUVBuffer );
				_gl.bufferData( _gl.ARRAY_BUFFER, uvArray, hint );

			}

		}

		if ( dirtyUvs && obj_uvs2 && uvType ) {

			for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

				fi = chunk_faces3[ f ];

				uv2 = obj_uvs2[ fi ];

				if ( uv2 === undefined ) continue;

				for ( i = 0; i < 3; i ++ ) {

					uv2i = uv2[ i ];

					uv2Array[ offset_uv2 ]     = uv2i.u;
					uv2Array[ offset_uv2 + 1 ] = uv2i.v;

					offset_uv2 += 2;

				}

			}

			for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

				fi = chunk_faces4[ f ];

				uv2 = obj_uvs2[ fi ];

				if ( uv2 === undefined ) continue;

				for ( i = 0; i < 4; i ++ ) {

					uv2i = uv2[ i ];

					uv2Array[ offset_uv2 ]     = uv2i.u;
					uv2Array[ offset_uv2 + 1 ] = uv2i.v;

					offset_uv2 += 2;

				}

			}

			if ( offset_uv2 > 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglUV2Buffer );
				_gl.bufferData( _gl.ARRAY_BUFFER, uv2Array, hint );

			}

		}

		if ( dirtyElements ) {

			for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

				faceArray[ offset_face ] 	 = vertexIndex;
				faceArray[ offset_face + 1 ] = vertexIndex + 1;
				faceArray[ offset_face + 2 ] = vertexIndex + 2;

				offset_face += 3;

				lineArray[ offset_line ]     = vertexIndex;
				lineArray[ offset_line + 1 ] = vertexIndex + 1;

				lineArray[ offset_line + 2 ] = vertexIndex;
				lineArray[ offset_line + 3 ] = vertexIndex + 2;

				lineArray[ offset_line + 4 ] = vertexIndex + 1;
				lineArray[ offset_line + 5 ] = vertexIndex + 2;

				offset_line += 6;

				vertexIndex += 3;

			}

			for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

				faceArray[ offset_face ]     = vertexIndex;
				faceArray[ offset_face + 1 ] = vertexIndex + 1;
				faceArray[ offset_face + 2 ] = vertexIndex + 3;

				faceArray[ offset_face + 3 ] = vertexIndex + 1;
				faceArray[ offset_face + 4 ] = vertexIndex + 2;
				faceArray[ offset_face + 5 ] = vertexIndex + 3;

				offset_face += 6;

				lineArray[ offset_line ]     = vertexIndex;
				lineArray[ offset_line + 1 ] = vertexIndex + 1;

				lineArray[ offset_line + 2 ] = vertexIndex;
				lineArray[ offset_line + 3 ] = vertexIndex + 3;

				lineArray[ offset_line + 4 ] = vertexIndex + 1;
				lineArray[ offset_line + 5 ] = vertexIndex + 2;

				lineArray[ offset_line + 6 ] = vertexIndex + 2;
				lineArray[ offset_line + 7 ] = vertexIndex + 3;

				offset_line += 8;

				vertexIndex += 4;

			}

			_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglFaceBuffer );
			_gl.bufferData( _gl.ELEMENT_ARRAY_BUFFER, faceArray, hint );

			_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglLineBuffer );
			_gl.bufferData( _gl.ELEMENT_ARRAY_BUFFER, lineArray, hint );

		}

		if ( customAttributes ) {

			for ( i = 0, il = customAttributes.length; i < il; i ++ ) {

				customAttribute = customAttributes[ i ];

				if ( ! customAttribute.__original.needsUpdate ) continue;

				offset_custom = 0;
				offset_customSrc = 0;

				if ( customAttribute.size === 1 ) {

					if ( customAttribute.boundTo === undefined || customAttribute.boundTo === "vertices" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							face = obj_faces[ chunk_faces3[ f ]	];

							customAttribute.array[ offset_custom ] 	   = customAttribute.value[ face.a ];
							customAttribute.array[ offset_custom + 1 ] = customAttribute.value[ face.b ];
							customAttribute.array[ offset_custom + 2 ] = customAttribute.value[ face.c ];

							offset_custom += 3;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							face = obj_faces[ chunk_faces4[ f ] ];

							customAttribute.array[ offset_custom ] 	   = customAttribute.value[ face.a ];
							customAttribute.array[ offset_custom + 1 ] = customAttribute.value[ face.b ];
							customAttribute.array[ offset_custom + 2 ] = customAttribute.value[ face.c ];
							customAttribute.array[ offset_custom + 3 ] = customAttribute.value[ face.d ];

							offset_custom += 4;

						}

					} else if ( customAttribute.boundTo === "faces" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces3[ f ] ];

							customAttribute.array[ offset_custom ] 	   = value;
							customAttribute.array[ offset_custom + 1 ] = value;
							customAttribute.array[ offset_custom + 2 ] = value;

							offset_custom += 3;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces4[ f ] ];

							customAttribute.array[ offset_custom ] 	   = value;
							customAttribute.array[ offset_custom + 1 ] = value;
							customAttribute.array[ offset_custom + 2 ] = value;
							customAttribute.array[ offset_custom + 3 ] = value;

							offset_custom += 4;

						}

					}

				} else if ( customAttribute.size === 2 ) {

					if ( customAttribute.boundTo === undefined || customAttribute.boundTo === "vertices" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							face = obj_faces[ chunk_faces3[ f ]	];

							v1 = customAttribute.value[ face.a ];
							v2 = customAttribute.value[ face.b ];
							v3 = customAttribute.value[ face.c ];

							customAttribute.array[ offset_custom ] 	   = v1.x;
							customAttribute.array[ offset_custom + 1 ] = v1.y;

							customAttribute.array[ offset_custom + 2 ] = v2.x;
							customAttribute.array[ offset_custom + 3 ] = v2.y;

							customAttribute.array[ offset_custom + 4 ] = v3.x;
							customAttribute.array[ offset_custom + 5 ] = v3.y;

							offset_custom += 6;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							face = obj_faces[ chunk_faces4[ f ] ];

							v1 = customAttribute.value[ face.a ];
							v2 = customAttribute.value[ face.b ];
							v3 = customAttribute.value[ face.c ];
							v4 = customAttribute.value[ face.d ];

							customAttribute.array[ offset_custom ] 	   = v1.x;
							customAttribute.array[ offset_custom + 1 ] = v1.y;

							customAttribute.array[ offset_custom + 2 ] = v2.x;
							customAttribute.array[ offset_custom + 3 ] = v2.y;

							customAttribute.array[ offset_custom + 4 ] = v3.x;
							customAttribute.array[ offset_custom + 5 ] = v3.y;

							customAttribute.array[ offset_custom + 6 ] = v4.x;
							customAttribute.array[ offset_custom + 7 ] = v4.y;

							offset_custom += 8;

						}

					} else if ( customAttribute.boundTo === "faces" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces3[ f ] ];

							v1 = value;
							v2 = value;
							v3 = value;

							customAttribute.array[ offset_custom ] 	   = v1.x;
							customAttribute.array[ offset_custom + 1 ] = v1.y;

							customAttribute.array[ offset_custom + 2 ] = v2.x;
							customAttribute.array[ offset_custom + 3 ] = v2.y;

							customAttribute.array[ offset_custom + 4 ] = v3.x;
							customAttribute.array[ offset_custom + 5 ] = v3.y;

							offset_custom += 6;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces4[ f ] ];

							v1 = value;
							v2 = value;
							v3 = value;
							v4 = value;

							customAttribute.array[ offset_custom ] 	   = v1.x;
							customAttribute.array[ offset_custom + 1 ] = v1.y;

							customAttribute.array[ offset_custom + 2 ] = v2.x;
							customAttribute.array[ offset_custom + 3 ] = v2.y;

							customAttribute.array[ offset_custom + 4 ] = v3.x;
							customAttribute.array[ offset_custom + 5 ] = v3.y;

							customAttribute.array[ offset_custom + 6 ] = v4.x;
							customAttribute.array[ offset_custom + 7 ] = v4.y;

							offset_custom += 8;

						}

					}

				} else if ( customAttribute.size === 3 ) {

					var pp;

					if ( customAttribute.type === "c" ) {

						pp = [ "r", "g", "b" ];

					} else {

						pp = [ "x", "y", "z" ];

					}

					if ( customAttribute.boundTo === undefined || customAttribute.boundTo === "vertices" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							face = obj_faces[ chunk_faces3[ f ]	];

							v1 = customAttribute.value[ face.a ];
							v2 = customAttribute.value[ face.b ];
							v3 = customAttribute.value[ face.c ];

							customAttribute.array[ offset_custom ] 	   = v1[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 1 ] = v1[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 2 ] = v1[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 3 ] = v2[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 4 ] = v2[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 5 ] = v2[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 6 ] = v3[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 7 ] = v3[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 8 ] = v3[ pp[ 2 ] ];

							offset_custom += 9;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							face = obj_faces[ chunk_faces4[ f ] ];

							v1 = customAttribute.value[ face.a ];
							v2 = customAttribute.value[ face.b ];
							v3 = customAttribute.value[ face.c ];
							v4 = customAttribute.value[ face.d ];

							customAttribute.array[ offset_custom  ] 	= v1[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 1  ] = v1[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 2  ] = v1[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 3  ] = v2[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 4  ] = v2[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 5  ] = v2[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 6  ] = v3[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 7  ] = v3[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 8  ] = v3[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 9  ] = v4[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 10 ] = v4[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 11 ] = v4[ pp[ 2 ] ];

							offset_custom += 12;

						}

					} else if ( customAttribute.boundTo === "faces" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces3[ f ] ];

							v1 = value;
							v2 = value;
							v3 = value;

							customAttribute.array[ offset_custom ] 	   = v1[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 1 ] = v1[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 2 ] = v1[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 3 ] = v2[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 4 ] = v2[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 5 ] = v2[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 6 ] = v3[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 7 ] = v3[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 8 ] = v3[ pp[ 2 ] ];

							offset_custom += 9;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces4[ f ] ];

							v1 = value;
							v2 = value;
							v3 = value;
							v4 = value;

							customAttribute.array[ offset_custom  ] 	= v1[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 1  ] = v1[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 2  ] = v1[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 3  ] = v2[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 4  ] = v2[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 5  ] = v2[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 6  ] = v3[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 7  ] = v3[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 8  ] = v3[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 9  ] = v4[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 10 ] = v4[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 11 ] = v4[ pp[ 2 ] ];

							offset_custom += 12;

						}

					} else if ( customAttribute.boundTo === "faceVertices" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces3[ f ] ];

							v1 = value[ 0 ];
							v2 = value[ 1 ];
							v3 = value[ 2 ];

							customAttribute.array[ offset_custom ] 	   = v1[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 1 ] = v1[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 2 ] = v1[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 3 ] = v2[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 4 ] = v2[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 5 ] = v2[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 6 ] = v3[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 7 ] = v3[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 8 ] = v3[ pp[ 2 ] ];

							offset_custom += 9;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces4[ f ] ];

							v1 = value[ 0 ];
							v2 = value[ 1 ];
							v3 = value[ 2 ];
							v4 = value[ 3 ];

							customAttribute.array[ offset_custom  ] 	= v1[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 1  ] = v1[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 2  ] = v1[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 3  ] = v2[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 4  ] = v2[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 5  ] = v2[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 6  ] = v3[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 7  ] = v3[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 8  ] = v3[ pp[ 2 ] ];

							customAttribute.array[ offset_custom + 9  ] = v4[ pp[ 0 ] ];
							customAttribute.array[ offset_custom + 10 ] = v4[ pp[ 1 ] ];
							customAttribute.array[ offset_custom + 11 ] = v4[ pp[ 2 ] ];

							offset_custom += 12;

						}

					}

				} else if ( customAttribute.size === 4 ) {

					if ( customAttribute.boundTo === undefined || customAttribute.boundTo === "vertices" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							face = obj_faces[ chunk_faces3[ f ]	];

							v1 = customAttribute.value[ face.a ];
							v2 = customAttribute.value[ face.b ];
							v3 = customAttribute.value[ face.c ];

							customAttribute.array[ offset_custom  ] 	= v1.x;
							customAttribute.array[ offset_custom + 1  ] = v1.y;
							customAttribute.array[ offset_custom + 2  ] = v1.z;
							customAttribute.array[ offset_custom + 3  ] = v1.w;

							customAttribute.array[ offset_custom + 4  ] = v2.x;
							customAttribute.array[ offset_custom + 5  ] = v2.y;
							customAttribute.array[ offset_custom + 6  ] = v2.z;
							customAttribute.array[ offset_custom + 7  ] = v2.w;

							customAttribute.array[ offset_custom + 8  ] = v3.x;
							customAttribute.array[ offset_custom + 9  ] = v3.y;
							customAttribute.array[ offset_custom + 10 ] = v3.z;
							customAttribute.array[ offset_custom + 11 ] = v3.w;

							offset_custom += 12;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							face = obj_faces[ chunk_faces4[ f ] ];

							v1 = customAttribute.value[ face.a ];
							v2 = customAttribute.value[ face.b ];
							v3 = customAttribute.value[ face.c ];
							v4 = customAttribute.value[ face.d ];

							customAttribute.array[ offset_custom  ] 	= v1.x;
							customAttribute.array[ offset_custom + 1  ] = v1.y;
							customAttribute.array[ offset_custom + 2  ] = v1.z;
							customAttribute.array[ offset_custom + 3  ] = v1.w;

							customAttribute.array[ offset_custom + 4  ] = v2.x;
							customAttribute.array[ offset_custom + 5  ] = v2.y;
							customAttribute.array[ offset_custom + 6  ] = v2.z;
							customAttribute.array[ offset_custom + 7  ] = v2.w;

							customAttribute.array[ offset_custom + 8  ] = v3.x;
							customAttribute.array[ offset_custom + 9  ] = v3.y;
							customAttribute.array[ offset_custom + 10 ] = v3.z;
							customAttribute.array[ offset_custom + 11 ] = v3.w;

							customAttribute.array[ offset_custom + 12 ] = v4.x;
							customAttribute.array[ offset_custom + 13 ] = v4.y;
							customAttribute.array[ offset_custom + 14 ] = v4.z;
							customAttribute.array[ offset_custom + 15 ] = v4.w;

							offset_custom += 16;

						}

					} else if ( customAttribute.boundTo === "faces" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces3[ f ] ];

							v1 = value;
							v2 = value;
							v3 = value;

							customAttribute.array[ offset_custom  ] 	= v1.x;
							customAttribute.array[ offset_custom + 1  ] = v1.y;
							customAttribute.array[ offset_custom + 2  ] = v1.z;
							customAttribute.array[ offset_custom + 3  ] = v1.w;

							customAttribute.array[ offset_custom + 4  ] = v2.x;
							customAttribute.array[ offset_custom + 5  ] = v2.y;
							customAttribute.array[ offset_custom + 6  ] = v2.z;
							customAttribute.array[ offset_custom + 7  ] = v2.w;

							customAttribute.array[ offset_custom + 8  ] = v3.x;
							customAttribute.array[ offset_custom + 9  ] = v3.y;
							customAttribute.array[ offset_custom + 10 ] = v3.z;
							customAttribute.array[ offset_custom + 11 ] = v3.w;

							offset_custom += 12;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces4[ f ] ];

							v1 = value;
							v2 = value;
							v3 = value;
							v4 = value;

							customAttribute.array[ offset_custom  ] 	= v1.x;
							customAttribute.array[ offset_custom + 1  ] = v1.y;
							customAttribute.array[ offset_custom + 2  ] = v1.z;
							customAttribute.array[ offset_custom + 3  ] = v1.w;

							customAttribute.array[ offset_custom + 4  ] = v2.x;
							customAttribute.array[ offset_custom + 5  ] = v2.y;
							customAttribute.array[ offset_custom + 6  ] = v2.z;
							customAttribute.array[ offset_custom + 7  ] = v2.w;

							customAttribute.array[ offset_custom + 8  ] = v3.x;
							customAttribute.array[ offset_custom + 9  ] = v3.y;
							customAttribute.array[ offset_custom + 10 ] = v3.z;
							customAttribute.array[ offset_custom + 11 ] = v3.w;

							customAttribute.array[ offset_custom + 12 ] = v4.x;
							customAttribute.array[ offset_custom + 13 ] = v4.y;
							customAttribute.array[ offset_custom + 14 ] = v4.z;
							customAttribute.array[ offset_custom + 15 ] = v4.w;

							offset_custom += 16;

						}

					} else if ( customAttribute.boundTo === "faceVertices" ) {

						for ( f = 0, fl = chunk_faces3.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces3[ f ] ];

							v1 = value[ 0 ];
							v2 = value[ 1 ];
							v3 = value[ 2 ];

							customAttribute.array[ offset_custom  ] 	= v1.x;
							customAttribute.array[ offset_custom + 1  ] = v1.y;
							customAttribute.array[ offset_custom + 2  ] = v1.z;
							customAttribute.array[ offset_custom + 3  ] = v1.w;

							customAttribute.array[ offset_custom + 4  ] = v2.x;
							customAttribute.array[ offset_custom + 5  ] = v2.y;
							customAttribute.array[ offset_custom + 6  ] = v2.z;
							customAttribute.array[ offset_custom + 7  ] = v2.w;

							customAttribute.array[ offset_custom + 8  ] = v3.x;
							customAttribute.array[ offset_custom + 9  ] = v3.y;
							customAttribute.array[ offset_custom + 10 ] = v3.z;
							customAttribute.array[ offset_custom + 11 ] = v3.w;

							offset_custom += 12;

						}

						for ( f = 0, fl = chunk_faces4.length; f < fl; f ++ ) {

							value = customAttribute.value[ chunk_faces4[ f ] ];

							v1 = value[ 0 ];
							v2 = value[ 1 ];
							v3 = value[ 2 ];
							v4 = value[ 3 ];

							customAttribute.array[ offset_custom  ] 	= v1.x;
							customAttribute.array[ offset_custom + 1  ] = v1.y;
							customAttribute.array[ offset_custom + 2  ] = v1.z;
							customAttribute.array[ offset_custom + 3  ] = v1.w;

							customAttribute.array[ offset_custom + 4  ] = v2.x;
							customAttribute.array[ offset_custom + 5  ] = v2.y;
							customAttribute.array[ offset_custom + 6  ] = v2.z;
							customAttribute.array[ offset_custom + 7  ] = v2.w;

							customAttribute.array[ offset_custom + 8  ] = v3.x;
							customAttribute.array[ offset_custom + 9  ] = v3.y;
							customAttribute.array[ offset_custom + 10 ] = v3.z;
							customAttribute.array[ offset_custom + 11 ] = v3.w;

							customAttribute.array[ offset_custom + 12 ] = v4.x;
							customAttribute.array[ offset_custom + 13 ] = v4.y;
							customAttribute.array[ offset_custom + 14 ] = v4.z;
							customAttribute.array[ offset_custom + 15 ] = v4.w;

							offset_custom += 16;

						}

					}

				}

				_gl.bindBuffer( _gl.ARRAY_BUFFER, customAttribute.buffer );
				_gl.bufferData( _gl.ARRAY_BUFFER, customAttribute.array, hint );

			}

		}

		if ( dispose ) {

			delete geometryGroup.__inittedArrays;
			delete geometryGroup.__colorArray;
			delete geometryGroup.__normalArray;
			delete geometryGroup.__tangentArray;
			delete geometryGroup.__uvArray;
			delete geometryGroup.__uv2Array;
			delete geometryGroup.__faceArray;
			delete geometryGroup.__vertexArray;
			delete geometryGroup.__lineArray;
			delete geometryGroup.__skinIndexArray;
			delete geometryGroup.__skinWeightArray;

		}

	};

	function setDirectBuffers ( geometry, hint, dispose ) {

		var attributes = geometry.attributes;

		var index = attributes[ "index" ];
		var position = attributes[ "position" ];
		var normal = attributes[ "normal" ];
		var uv = attributes[ "uv" ];
		var color = attributes[ "color" ];
		var tangent = attributes[ "tangent" ];

		if ( geometry.elementsNeedUpdate && index !== undefined ) {

			_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, index.buffer );
			_gl.bufferData( _gl.ELEMENT_ARRAY_BUFFER, index.array, hint );

		}

		if ( geometry.verticesNeedUpdate && position !== undefined ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, position.buffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, position.array, hint );

		}

		if ( geometry.normalsNeedUpdate && normal !== undefined ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, normal.buffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, normal.array, hint );

		}

		if ( geometry.uvsNeedUpdate && uv !== undefined ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, uv.buffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, uv.array, hint );

		}

		if ( geometry.colorsNeedUpdate && color !== undefined ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, color.buffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, color.array, hint );

		}

		if ( geometry.tangentsNeedUpdate && tangent !== undefined ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, tangent.buffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, tangent.array, hint );

		}

		if ( dispose ) {

			for ( var i in geometry.attributes ) {

				delete geometry.attributes[ i ].array;

			}

		}

	};

	// Buffer rendering

	this.renderBufferImmediate = function ( object, program, material ) {

		if ( object.hasPositions && ! object.__webglVertexBuffer ) object.__webglVertexBuffer = _gl.createBuffer();
		if ( object.hasNormals && ! object.__webglNormalBuffer ) object.__webglNormalBuffer = _gl.createBuffer();
		if ( object.hasUvs && ! object.__webglUvBuffer ) object.__webglUvBuffer = _gl.createBuffer();
		if ( object.hasColors && ! object.__webglColorBuffer ) object.__webglColorBuffer = _gl.createBuffer();

		if ( object.hasPositions ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, object.__webglVertexBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, object.positionArray, _gl.DYNAMIC_DRAW );
			_gl.enableVertexAttribArray( program.attributes.position );
			_gl.vertexAttribPointer( program.attributes.position, 3, _gl.FLOAT, false, 0, 0 );

		}

		if ( object.hasNormals ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, object.__webglNormalBuffer );

			if ( material.shading === THREE.FlatShading ) {

				var nx, ny, nz,
					nax, nbx, ncx, nay, nby, ncy, naz, nbz, ncz,
					normalArray,
					i, il = object.count * 3;

				for( i = 0; i < il; i += 9 ) {

					normalArray = object.normalArray;

					nax  = normalArray[ i ];
					nay  = normalArray[ i + 1 ];
					naz  = normalArray[ i + 2 ];

					nbx  = normalArray[ i + 3 ];
					nby  = normalArray[ i + 4 ];
					nbz  = normalArray[ i + 5 ];

					ncx  = normalArray[ i + 6 ];
					ncy  = normalArray[ i + 7 ];
					ncz  = normalArray[ i + 8 ];

					nx = ( nax + nbx + ncx ) / 3;
					ny = ( nay + nby + ncy ) / 3;
					nz = ( naz + nbz + ncz ) / 3;

					normalArray[ i ] 	 = nx;
					normalArray[ i + 1 ] = ny;
					normalArray[ i + 2 ] = nz;

					normalArray[ i + 3 ] = nx;
					normalArray[ i + 4 ] = ny;
					normalArray[ i + 5 ] = nz;

					normalArray[ i + 6 ] = nx;
					normalArray[ i + 7 ] = ny;
					normalArray[ i + 8 ] = nz;

				}

			}

			_gl.bufferData( _gl.ARRAY_BUFFER, object.normalArray, _gl.DYNAMIC_DRAW );
			_gl.enableVertexAttribArray( program.attributes.normal );
			_gl.vertexAttribPointer( program.attributes.normal, 3, _gl.FLOAT, false, 0, 0 );

		}

		if ( object.hasUvs && material.map ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, object.__webglUvBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, object.uvArray, _gl.DYNAMIC_DRAW );
			_gl.enableVertexAttribArray( program.attributes.uv );
			_gl.vertexAttribPointer( program.attributes.uv, 2, _gl.FLOAT, false, 0, 0 );

		}

		if ( object.hasColors && material.vertexColors !== THREE.NoColors ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, object.__webglColorBuffer );
			_gl.bufferData( _gl.ARRAY_BUFFER, object.colorArray, _gl.DYNAMIC_DRAW );
			_gl.enableVertexAttribArray( program.attributes.color );
			_gl.vertexAttribPointer( program.attributes.color, 3, _gl.FLOAT, false, 0, 0 );

		}

		_gl.drawArrays( _gl.TRIANGLES, 0, object.count );

		object.count = 0;

	};

	this.renderBufferDirect = function ( camera, lights, fog, material, geometry, object ) {

		if ( material.visible === false ) return;

		var program, attributes, linewidth, primitives, a, attribute;

		program = setProgram( camera, lights, fog, material, object );

		attributes = program.attributes;

		var updateBuffers = false,
			wireframeBit = material.wireframe ? 1 : 0,
			geometryHash = ( geometry.id * 0xffffff ) + ( program.id * 2 ) + wireframeBit;

		if ( geometryHash !== _currentGeometryGroupHash ) {

			_currentGeometryGroupHash = geometryHash;
			updateBuffers = true;

		}

		// render mesh

		if ( object instanceof THREE.Mesh ) {

			var offsets = geometry.offsets;

			// if there is more than 1 chunk
			// must set attribute pointers to use new offsets for each chunk
			// even if geometry and materials didn't change

			if ( offsets.length > 1 ) updateBuffers = true;

			for ( var i = 0, il = offsets.length; i < il; ++ i ) {

				var startIndex = offsets[ i ].index;

				if ( updateBuffers ) {

					// vertices

					var position = geometry.attributes[ "position" ];
					var positionSize = position.itemSize;

					_gl.bindBuffer( _gl.ARRAY_BUFFER, position.buffer );
					_gl.vertexAttribPointer( attributes.position, positionSize, _gl.FLOAT, false, 0, startIndex * positionSize * 4 ); // 4 bytes per Float32

					// normals

					var normal = geometry.attributes[ "normal" ];

					if ( attributes.normal >= 0 && normal ) {

						var normalSize = normal.itemSize;

						_gl.bindBuffer( _gl.ARRAY_BUFFER, normal.buffer );
						_gl.vertexAttribPointer( attributes.normal, normalSize, _gl.FLOAT, false, 0, startIndex * normalSize * 4 );

					}

					// uvs

					var uv = geometry.attributes[ "uv" ];

					if ( attributes.uv >= 0 && uv ) {

						if ( uv.buffer ) {

							var uvSize = uv.itemSize;

							_gl.bindBuffer( _gl.ARRAY_BUFFER, uv.buffer );
							_gl.vertexAttribPointer( attributes.uv, uvSize, _gl.FLOAT, false, 0, startIndex * uvSize * 4 );

							_gl.enableVertexAttribArray( attributes.uv );

						} else {

							_gl.disableVertexAttribArray( attributes.uv );

						}

					}

					// colors

					var color = geometry.attributes[ "color" ];

					if ( attributes.color >= 0 && color ) {

						var colorSize = color.itemSize;

						_gl.bindBuffer( _gl.ARRAY_BUFFER, color.buffer );
						_gl.vertexAttribPointer( attributes.color, colorSize, _gl.FLOAT, false, 0, startIndex * colorSize * 4 );

					}

					// tangents

					var tangent = geometry.attributes[ "tangent" ];

					if ( attributes.tangent >= 0 && tangent ) {

						var tangentSize = tangent.itemSize;

						_gl.bindBuffer( _gl.ARRAY_BUFFER, tangent.buffer );
						_gl.vertexAttribPointer( attributes.tangent, tangentSize, _gl.FLOAT, false, 0, startIndex * tangentSize * 4 );

					}

					// indices

					var index = geometry.attributes[ "index" ];

					_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, index.buffer );

				}

				// render indexed triangles

				_gl.drawElements( _gl.TRIANGLES, offsets[ i ].count, _gl.UNSIGNED_SHORT, offsets[ i ].start * 2 ); // 2 bytes per Uint16

				_this.info.render.calls ++;
				_this.info.render.vertices += offsets[ i ].count; // not really true, here vertices can be shared
				_this.info.render.faces += offsets[ i ].count / 3;

			}

		// render particles

		} else if ( object instanceof THREE.ParticleSystem ) {

			if ( updateBuffers ) {

				// vertices

				var position = geometry.attributes[ "position" ];
				var positionSize = position.itemSize;

				_gl.bindBuffer( _gl.ARRAY_BUFFER, position.buffer );
				_gl.vertexAttribPointer( attributes.position, positionSize, _gl.FLOAT, false, 0, 0 );

				// colors

				var color = geometry.attributes[ "color" ];

				if ( attributes.color >= 0 && color ) {

					var colorSize = color.itemSize;

					_gl.bindBuffer( _gl.ARRAY_BUFFER, color.buffer );
					_gl.vertexAttribPointer( attributes.color, colorSize, _gl.FLOAT, false, 0, 0 );

				}

				// render particles

				_gl.drawArrays( _gl.POINTS, 0, position.numItems / 3 );

				_this.info.render.calls ++;
				_this.info.render.points += position.numItems / 3;

			}

		}

	};

	this.renderBuffer = function ( camera, lights, fog, material, geometryGroup, object ) {

		if ( material.visible === false ) return;

		var program, attributes, linewidth, primitives, a, attribute, i, il;

		program = setProgram( camera, lights, fog, material, object );

		attributes = program.attributes;

		var updateBuffers = false,
			wireframeBit = material.wireframe ? 1 : 0,
			geometryGroupHash = ( geometryGroup.id * 0xffffff ) + ( program.id * 2 ) + wireframeBit;

		if ( geometryGroupHash !== _currentGeometryGroupHash ) {

			_currentGeometryGroupHash = geometryGroupHash;
			updateBuffers = true;

		}

		// vertices

		if ( !material.morphTargets && attributes.position >= 0 ) {

			if ( updateBuffers ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglVertexBuffer );
				_gl.vertexAttribPointer( attributes.position, 3, _gl.FLOAT, false, 0, 0 );

			}

		} else {

			if ( object.morphTargetBase ) {

				setupMorphTargets( material, geometryGroup, object );

			}

		}


		if ( updateBuffers ) {

			// custom attributes

			// Use the per-geometryGroup custom attribute arrays which are setup in initMeshBuffers

			if ( geometryGroup.__webglCustomAttributesList ) {

				for ( i = 0, il = geometryGroup.__webglCustomAttributesList.length; i < il; i ++ ) {

					attribute = geometryGroup.__webglCustomAttributesList[ i ];

					if ( attributes[ attribute.buffer.belongsToAttribute ] >= 0 ) {

						_gl.bindBuffer( _gl.ARRAY_BUFFER, attribute.buffer );
						_gl.vertexAttribPointer( attributes[ attribute.buffer.belongsToAttribute ], attribute.size, _gl.FLOAT, false, 0, 0 );

					}

				}

			}


			// colors

			if ( attributes.color >= 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglColorBuffer );
				_gl.vertexAttribPointer( attributes.color, 3, _gl.FLOAT, false, 0, 0 );

			}

			// normals

			if ( attributes.normal >= 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglNormalBuffer );
				_gl.vertexAttribPointer( attributes.normal, 3, _gl.FLOAT, false, 0, 0 );

			}

			// tangents

			if ( attributes.tangent >= 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglTangentBuffer );
				_gl.vertexAttribPointer( attributes.tangent, 4, _gl.FLOAT, false, 0, 0 );

			}

			// uvs

			if ( attributes.uv >= 0 ) {

				if ( geometryGroup.__webglUVBuffer ) {

					_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglUVBuffer );
					_gl.vertexAttribPointer( attributes.uv, 2, _gl.FLOAT, false, 0, 0 );

					_gl.enableVertexAttribArray( attributes.uv );

				} else {

					_gl.disableVertexAttribArray( attributes.uv );

				}

			}

			if ( attributes.uv2 >= 0 ) {

				if ( geometryGroup.__webglUV2Buffer ) {

					_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglUV2Buffer );
					_gl.vertexAttribPointer( attributes.uv2, 2, _gl.FLOAT, false, 0, 0 );

					_gl.enableVertexAttribArray( attributes.uv2 );

				} else {

					_gl.disableVertexAttribArray( attributes.uv2 );

				}

			}

			if ( material.skinning &&
				 attributes.skinIndex >= 0 && attributes.skinWeight >= 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglSkinIndicesBuffer );
				_gl.vertexAttribPointer( attributes.skinIndex, 4, _gl.FLOAT, false, 0, 0 );

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglSkinWeightsBuffer );
				_gl.vertexAttribPointer( attributes.skinWeight, 4, _gl.FLOAT, false, 0, 0 );

			}

			// line distances

			if ( attributes.lineDistance >= 0 ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglLineDistanceBuffer );
				_gl.vertexAttribPointer( attributes.lineDistance, 1, _gl.FLOAT, false, 0, 0 );

			}

		}

		// render mesh

		if ( object instanceof THREE.Mesh ) {

			// wireframe

			if ( material.wireframe ) {

				setLineWidth( material.wireframeLinewidth );

				if ( updateBuffers ) _gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglLineBuffer );
				_gl.drawElements( _gl.LINES, geometryGroup.__webglLineCount, _gl.UNSIGNED_SHORT, 0 );

			// triangles

			} else {

				if ( updateBuffers ) _gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglFaceBuffer );
				_gl.drawElements( _gl.TRIANGLES, geometryGroup.__webglFaceCount, _gl.UNSIGNED_SHORT, 0 );

			}

			_this.info.render.calls ++;
			_this.info.render.vertices += geometryGroup.__webglFaceCount;
			_this.info.render.faces += geometryGroup.__webglFaceCount / 3;

		// render lines

		} else if ( object instanceof THREE.Line ) {

			primitives = ( object.type === THREE.LineStrip ) ? _gl.LINE_STRIP : _gl.LINES;

			setLineWidth( material.linewidth );

			_gl.drawArrays( primitives, 0, geometryGroup.__webglLineCount );

			_this.info.render.calls ++;

		// render particles

		} else if ( object instanceof THREE.ParticleSystem ) {

			_gl.drawArrays( _gl.POINTS, 0, geometryGroup.__webglParticleCount );

			_this.info.render.calls ++;
			_this.info.render.points += geometryGroup.__webglParticleCount;

		// render ribbon

		} else if ( object instanceof THREE.Ribbon ) {

			_gl.drawArrays( _gl.TRIANGLE_STRIP, 0, geometryGroup.__webglVertexCount );

			_this.info.render.calls ++;

		}

	};

	function setupMorphTargets ( material, geometryGroup, object ) {

		// set base

		var attributes = material.program.attributes;

		if ( object.morphTargetBase !== -1 ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglMorphTargetsBuffers[ object.morphTargetBase ] );
			_gl.vertexAttribPointer( attributes.position, 3, _gl.FLOAT, false, 0, 0 );

		} else if ( attributes.position >= 0 ) {

			_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglVertexBuffer );
			_gl.vertexAttribPointer( attributes.position, 3, _gl.FLOAT, false, 0, 0 );

		}

		if ( object.morphTargetForcedOrder.length ) {

			// set forced order

			var m = 0;
			var order = object.morphTargetForcedOrder;
			var influences = object.morphTargetInfluences;

			while ( m < material.numSupportedMorphTargets && m < order.length ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglMorphTargetsBuffers[ order[ m ] ] );
				_gl.vertexAttribPointer( attributes[ "morphTarget" + m ], 3, _gl.FLOAT, false, 0, 0 );

				if ( material.morphNormals ) {

					_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglMorphNormalsBuffers[ order[ m ] ] );
					_gl.vertexAttribPointer( attributes[ "morphNormal" + m ], 3, _gl.FLOAT, false, 0, 0 );

				}

				object.__webglMorphTargetInfluences[ m ] = influences[ order[ m ] ];

				m ++;
			}

		} else {

			// find the most influencing

			var influence, activeInfluenceIndices = [];
			var influences = object.morphTargetInfluences;
			var i, il = influences.length;

			for ( i = 0; i < il; i ++ ) {

				influence = influences[ i ];

				if ( influence > 0 ) {

					activeInfluenceIndices.push( [ i, influence ] );

				}

			}

			if ( activeInfluenceIndices.length > material.numSupportedMorphTargets ) {

				activeInfluenceIndices.sort( numericalSort );
				activeInfluenceIndices.length = material.numSupportedMorphTargets;

			} else if ( activeInfluenceIndices.length > material.numSupportedMorphNormals ) {

				activeInfluenceIndices.sort( numericalSort );

			} else if ( activeInfluenceIndices.length === 0 ) {

				activeInfluenceIndices.push( [ 0, 0 ] );

			};

			var influenceIndex, m = 0;

			while ( m < material.numSupportedMorphTargets ) {

				if ( activeInfluenceIndices[ m ] ) {

					influenceIndex = activeInfluenceIndices[ m ][ 0 ];

					_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglMorphTargetsBuffers[ influenceIndex ] );

					_gl.vertexAttribPointer( attributes[ "morphTarget" + m ], 3, _gl.FLOAT, false, 0, 0 );

					if ( material.morphNormals ) {

						_gl.bindBuffer( _gl.ARRAY_BUFFER, geometryGroup.__webglMorphNormalsBuffers[ influenceIndex ] );
						_gl.vertexAttribPointer( attributes[ "morphNormal" + m ], 3, _gl.FLOAT, false, 0, 0 );

					}

					object.__webglMorphTargetInfluences[ m ] = influences[ influenceIndex ];

				} else {

					_gl.vertexAttribPointer( attributes[ "morphTarget" + m ], 3, _gl.FLOAT, false, 0, 0 );

					if ( material.morphNormals ) {

						_gl.vertexAttribPointer( attributes[ "morphNormal" + m ], 3, _gl.FLOAT, false, 0, 0 );

					}

					object.__webglMorphTargetInfluences[ m ] = 0;

				}

				m ++;

			}

		}

		// load updated influences uniform

		if ( material.program.uniforms.morphTargetInfluences !== null ) {

			_gl.uniform1fv( material.program.uniforms.morphTargetInfluences, object.__webglMorphTargetInfluences );

		}

	};

	// Sorting

	function painterSortStable ( a, b ) {

		if ( a.z !== b.z ) {

			return b.z - a.z;

		} else {

			return b.id - a.id;

		}

	};

	function numericalSort ( a, b ) {

		return b[ 1 ] - a[ 1 ];

	};


	// Rendering

	this.render = function ( scene, camera, renderTarget, forceClear ) {

		if ( camera instanceof THREE.Camera === false ) {

			console.error( 'THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.' );
			return;

		}

		var i, il,

		webglObject, object,
		renderList,

		lights = scene.__lights,
		fog = scene.fog;

		// reset caching for this frame

		_currentMaterialId = -1;
		_lightsNeedUpdate = true;

		// update scene graph

		if ( this.autoUpdateScene ) scene.updateMatrixWorld();

		// update camera matrices and frustum

		if ( camera.parent === undefined ) camera.updateMatrixWorld();

		if ( ! camera._viewMatrixArray ) camera._viewMatrixArray = new Float32Array( 16 );
		if ( ! camera._projectionMatrixArray ) camera._projectionMatrixArray = new Float32Array( 16 );

		camera.matrixWorldInverse.getInverse( camera.matrixWorld );

		camera.matrixWorldInverse.flattenToArray( camera._viewMatrixArray );
		camera.projectionMatrix.flattenToArray( camera._projectionMatrixArray );

		_projScreenMatrix.multiply( camera.projectionMatrix, camera.matrixWorldInverse );
		_frustum.setFromMatrix( _projScreenMatrix );

		// update WebGL objects

		if ( this.autoUpdateObjects ) this.initWebGLObjects( scene );

		// custom render plugins (pre pass)

		renderPlugins( this.renderPluginsPre, scene, camera );

		//

		_this.info.render.calls = 0;
		_this.info.render.vertices = 0;
		_this.info.render.faces = 0;
		_this.info.render.points = 0;

		this.setRenderTarget( renderTarget );

		if ( this.autoClear || forceClear ) {

			this.clear( this.autoClearColor, this.autoClearDepth, this.autoClearStencil );

		}

		// set matrices for regular objects (frustum culled)

		renderList = scene.__webglObjects;

		for ( i = 0, il = renderList.length; i < il; i ++ ) {

			webglObject = renderList[ i ];
			object = webglObject.object;

			webglObject.render = false;

			if ( object.visible ) {

				if ( ! ( object instanceof THREE.Mesh || object instanceof THREE.ParticleSystem ) || ! ( object.frustumCulled ) || _frustum.contains( object ) ) {

					//object.matrixWorld.flattenToArray( object._modelMatrixArray );

					setupMatrices( object, camera );

					unrollBufferMaterial( webglObject );

					webglObject.render = true;

					if ( this.sortObjects === true ) {

						if ( object.renderDepth !== null ) {

							webglObject.z = object.renderDepth;

						} else {

							_vector3.copy( object.matrixWorld.getPosition() );
							_projScreenMatrix.multiplyVector3( _vector3 );

							webglObject.z = _vector3.z;

						}

						webglObject.id = object.id;

					}

				}

			}

		}

		if ( this.sortObjects ) {

			renderList.sort( painterSortStable );

		}

		// set matrices for immediate objects

		renderList = scene.__webglObjectsImmediate;

		for ( i = 0, il = renderList.length; i < il; i ++ ) {

			webglObject = renderList[ i ];
			object = webglObject.object;

			if ( object.visible ) {

				/*
				if ( object.matrixAutoUpdate ) {

					object.matrixWorld.flattenToArray( object._modelMatrixArray );

				}
				*/

				setupMatrices( object, camera );

				unrollImmediateBufferMaterial( webglObject );

			}

		}

		if ( scene.overrideMaterial ) {

			var material = scene.overrideMaterial;

			this.setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst );
			this.setDepthTest( material.depthTest );
			this.setDepthWrite( material.depthWrite );
			setPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );

			renderObjects( scene.__webglObjects, false, "", camera, lights, fog, true, material );
			renderObjectsImmediate( scene.__webglObjectsImmediate, "", camera, lights, fog, false, material );

		} else {

			// opaque pass (front-to-back order)

			this.setBlending( THREE.NormalBlending );

			renderObjects( scene.__webglObjects, true, "opaque", camera, lights, fog, false );
			renderObjectsImmediate( scene.__webglObjectsImmediate, "opaque", camera, lights, fog, false );

			// transparent pass (back-to-front order)

			renderObjects( scene.__webglObjects, false, "transparent", camera, lights, fog, true );
			renderObjectsImmediate( scene.__webglObjectsImmediate, "transparent", camera, lights, fog, true );

		}

		// custom render plugins (post pass)

		renderPlugins( this.renderPluginsPost, scene, camera );


		// Generate mipmap if we're using any kind of mipmap filtering

		if ( renderTarget && renderTarget.generateMipmaps && renderTarget.minFilter !== THREE.NearestFilter && renderTarget.minFilter !== THREE.LinearFilter ) {

			updateRenderTargetMipmap( renderTarget );

		}

		// Ensure depth buffer writing is enabled so it can be cleared on next render

		this.setDepthTest( true );
		this.setDepthWrite( true );

		// _gl.finish();

	};

	function renderPlugins( plugins, scene, camera ) {

		if ( ! plugins.length ) return;

		for ( var i = 0, il = plugins.length; i < il; i ++ ) {

			// reset state for plugin (to start from clean slate)

			_currentProgram = null;
			_currentCamera = null;

			_oldBlending = -1;
			_oldDepthTest = -1;
			_oldDepthWrite = -1;
			_oldDoubleSided = -1;
			_oldFlipSided = -1;
			_currentGeometryGroupHash = -1;
			_currentMaterialId = -1;

			_lightsNeedUpdate = true;

			plugins[ i ].render( scene, camera, _currentWidth, _currentHeight );

			// reset state after plugin (anything could have changed)

			_currentProgram = null;
			_currentCamera = null;

			_oldBlending = -1;
			_oldDepthTest = -1;
			_oldDepthWrite = -1;
			_oldDoubleSided = -1;
			_oldFlipSided = -1;
			_currentGeometryGroupHash = -1;
			_currentMaterialId = -1;

			_lightsNeedUpdate = true;

		}

	};

	function renderObjects ( renderList, reverse, materialType, camera, lights, fog, useBlending, overrideMaterial ) {

		var webglObject, object, buffer, material, start, end, delta;

		if ( reverse ) {

			start = renderList.length - 1;
			end = -1;
			delta = -1;

		} else {

			start = 0;
			end = renderList.length;
			delta = 1;
		}

		for ( var i = start; i !== end; i += delta ) {

			webglObject = renderList[ i ];

			if ( webglObject.render ) {

				object = webglObject.object;
				buffer = webglObject.buffer;

				if ( overrideMaterial ) {

					material = overrideMaterial;

				} else {

					material = webglObject[ materialType ];

					if ( ! material ) continue;

					if ( useBlending ) _this.setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst );

					_this.setDepthTest( material.depthTest );
					_this.setDepthWrite( material.depthWrite );
					setPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );

				}

				_this.setMaterialFaces( material );

				if ( buffer instanceof THREE.BufferGeometry ) {

					_this.renderBufferDirect( camera, lights, fog, material, buffer, object );

				} else {

					_this.renderBuffer( camera, lights, fog, material, buffer, object );

				}

			}

		}

	};

	function renderObjectsImmediate ( renderList, materialType, camera, lights, fog, useBlending, overrideMaterial ) {

		var webglObject, object, material, program;

		for ( var i = 0, il = renderList.length; i < il; i ++ ) {

			webglObject = renderList[ i ];
			object = webglObject.object;

			if ( object.visible ) {

				if ( overrideMaterial ) {

					material = overrideMaterial;

				} else {

					material = webglObject[ materialType ];

					if ( ! material ) continue;

					if ( useBlending ) _this.setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst );

					_this.setDepthTest( material.depthTest );
					_this.setDepthWrite( material.depthWrite );
					setPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );

				}

				_this.renderImmediateObject( camera, lights, fog, material, object );

			}

		}

	};

	this.renderImmediateObject = function ( camera, lights, fog, material, object ) {

		var program = setProgram( camera, lights, fog, material, object );

		_currentGeometryGroupHash = -1;

		_this.setMaterialFaces( material );

		if ( object.immediateRenderCallback ) {

			object.immediateRenderCallback( program, _gl, _frustum );

		} else {

			object.render( function( object ) { _this.renderBufferImmediate( object, program, material ); } );

		}

	};

	function unrollImmediateBufferMaterial ( globject ) {

		var object = globject.object,
			material = object.material;

		if ( material.transparent ) {

			globject.transparent = material;
			globject.opaque = null;

		} else {

			globject.opaque = material;
			globject.transparent = null;

		}

	};

	function unrollBufferMaterial ( globject ) {

		var object = globject.object,
			buffer = globject.buffer,
			material, materialIndex, meshMaterial;

		meshMaterial = object.material;

		if ( meshMaterial instanceof THREE.MeshFaceMaterial ) {

			materialIndex = buffer.materialIndex;

			if ( materialIndex >= 0 ) {

				material = meshMaterial.materials[ materialIndex ];

				if ( material.transparent ) {

					globject.transparent = material;
					globject.opaque = null;

				} else {

					globject.opaque = material;
					globject.transparent = null;

				}

			}

		} else {

			material = meshMaterial;

			if ( material ) {

				if ( material.transparent ) {

					globject.transparent = material;
					globject.opaque = null;

				} else {

					globject.opaque = material;
					globject.transparent = null;

				}

			}

		}

	};

	// Geometry splitting

	function sortFacesByMaterial ( geometry, material ) {

		var f, fl, face, materialIndex, vertices,
			materialHash, groupHash,
			hash_map = {};

		var numMorphTargets = geometry.morphTargets.length;
		var numMorphNormals = geometry.morphNormals.length;

		var usesFaceMaterial = material instanceof THREE.MeshFaceMaterial;

		geometry.geometryGroups = {};

		for ( f = 0, fl = geometry.faces.length; f < fl; f ++ ) {

			face = geometry.faces[ f ];
			materialIndex = usesFaceMaterial ? face.materialIndex : undefined;

			materialHash = ( materialIndex !== undefined ) ? materialIndex : -1;

			if ( hash_map[ materialHash ] === undefined ) {

				hash_map[ materialHash ] = { 'hash': materialHash, 'counter': 0 };

			}

			groupHash = hash_map[ materialHash ].hash + '_' + hash_map[ materialHash ].counter;

			if ( geometry.geometryGroups[ groupHash ] === undefined ) {

				geometry.geometryGroups[ groupHash ] = { 'faces3': [], 'faces4': [], 'materialIndex': materialIndex, 'vertices': 0, 'numMorphTargets': numMorphTargets, 'numMorphNormals': numMorphNormals };

			}

			vertices = face instanceof THREE.Face3 ? 3 : 4;

			if ( geometry.geometryGroups[ groupHash ].vertices + vertices > 65535 ) {

				hash_map[ materialHash ].counter += 1;
				groupHash = hash_map[ materialHash ].hash + '_' + hash_map[ materialHash ].counter;

				if ( geometry.geometryGroups[ groupHash ] === undefined ) {

					geometry.geometryGroups[ groupHash ] = { 'faces3': [], 'faces4': [], 'materialIndex': materialIndex, 'vertices': 0, 'numMorphTargets': numMorphTargets, 'numMorphNormals': numMorphNormals };

				}

			}

			if ( face instanceof THREE.Face3 ) {

				geometry.geometryGroups[ groupHash ].faces3.push( f );

			} else {

				geometry.geometryGroups[ groupHash ].faces4.push( f );

			}

			geometry.geometryGroups[ groupHash ].vertices += vertices;

		}

		geometry.geometryGroupsList = [];

		for ( var g in geometry.geometryGroups ) {

			geometry.geometryGroups[ g ].id = _geometryGroupCounter ++;

			geometry.geometryGroupsList.push( geometry.geometryGroups[ g ] );

		}

	};

	// Objects refresh

	this.initWebGLObjects = function ( scene ) {

		if ( !scene.__webglObjects ) {

			scene.__webglObjects = [];
			scene.__webglObjectsImmediate = [];
			scene.__webglSprites = [];
			scene.__webglFlares = [];

		}

		while ( scene.__objectsAdded.length ) {

			addObject( scene.__objectsAdded[ 0 ], scene );
			scene.__objectsAdded.splice( 0, 1 );

		}

		while ( scene.__objectsRemoved.length ) {

			removeObject( scene.__objectsRemoved[ 0 ], scene );
			scene.__objectsRemoved.splice( 0, 1 );

		}

		// update must be called after objects adding / removal

		for ( var o = 0, ol = scene.__webglObjects.length; o < ol; o ++ ) {

			updateObject( scene.__webglObjects[ o ].object );

		}

	};

	// Objects adding

	function addObject ( object, scene ) {

		var g, geometry, material, geometryGroup;

		if ( ! object.__webglInit ) {

			object.__webglInit = true;

			object._modelViewMatrix = new THREE.Matrix4();
			object._normalMatrix = new THREE.Matrix3();

			if ( object instanceof THREE.Mesh ) {

				geometry = object.geometry;
				material = object.material;

				if ( geometry instanceof THREE.Geometry ) {

					if ( geometry.geometryGroups === undefined ) {

						sortFacesByMaterial( geometry, material );

					}

					// create separate VBOs per geometry chunk

					for ( g in geometry.geometryGroups ) {

						geometryGroup = geometry.geometryGroups[ g ];

						// initialise VBO on the first access

						if ( ! geometryGroup.__webglVertexBuffer ) {

							createMeshBuffers( geometryGroup );
							initMeshBuffers( geometryGroup, object );

							geometry.verticesNeedUpdate = true;
							geometry.morphTargetsNeedUpdate = true;
							geometry.elementsNeedUpdate = true;
							geometry.uvsNeedUpdate = true;
							geometry.normalsNeedUpdate = true;
							geometry.tangentsNeedUpdate = true;
							geometry.colorsNeedUpdate = true;

						}

					}

				} else if ( geometry instanceof THREE.BufferGeometry ) {

					initDirectBuffers( geometry );

				}

			} else if ( object instanceof THREE.Ribbon ) {

				geometry = object.geometry;

				if ( ! geometry.__webglVertexBuffer ) {

					createRibbonBuffers( geometry );
					initRibbonBuffers( geometry, object );

					geometry.verticesNeedUpdate = true;
					geometry.colorsNeedUpdate = true;
					geometry.normalsNeedUpdate = true;

				}

			} else if ( object instanceof THREE.Line ) {

				geometry = object.geometry;

				if ( ! geometry.__webglVertexBuffer ) {

					createLineBuffers( geometry );
					initLineBuffers( geometry, object );

					geometry.verticesNeedUpdate = true;
					geometry.colorsNeedUpdate = true;
					geometry.lineDistancesNeedUpdate = true;

				}

			} else if ( object instanceof THREE.ParticleSystem ) {

				geometry = object.geometry;

				if ( ! geometry.__webglVertexBuffer ) {

					if ( geometry instanceof THREE.Geometry ) {

						createParticleBuffers( geometry );
						initParticleBuffers( geometry, object );

						geometry.verticesNeedUpdate = true;
						geometry.colorsNeedUpdate = true;

					} else if ( geometry instanceof THREE.BufferGeometry ) {

						initDirectBuffers( geometry );

					}


				}

			}

		}

		if ( ! object.__webglActive ) {

			if ( object instanceof THREE.Mesh ) {

				geometry = object.geometry;

				if ( geometry instanceof THREE.BufferGeometry ) {

					addBuffer( scene.__webglObjects, geometry, object );

				} else {

					for ( g in geometry.geometryGroups ) {

						geometryGroup = geometry.geometryGroups[ g ];

						addBuffer( scene.__webglObjects, geometryGroup, object );

					}

				}

			} else if ( object instanceof THREE.Ribbon ||
						object instanceof THREE.Line ||
						object instanceof THREE.ParticleSystem ) {

				geometry = object.geometry;
				addBuffer( scene.__webglObjects, geometry, object );

			} else if ( object instanceof THREE.ImmediateRenderObject || object.immediateRenderCallback ) {

				addBufferImmediate( scene.__webglObjectsImmediate, object );

			} else if ( object instanceof THREE.Sprite ) {

				scene.__webglSprites.push( object );

			} else if ( object instanceof THREE.LensFlare ) {

				scene.__webglFlares.push( object );

			}

			object.__webglActive = true;

		}

	};

	function addBuffer ( objlist, buffer, object ) {

		objlist.push(
			{
				buffer: buffer,
				object: object,
				opaque: null,
				transparent: null,
				z: 0,
			}
		);

	};

	function addBufferImmediate ( objlist, object ) {

		objlist.push(
			{
				object: object,
				opaque: null,
				transparent: null,
				z: 0,
			}
		);

	};

	// Objects updates

	function updateObject ( object ) {

		var geometry = object.geometry,
			geometryGroup, customAttributesDirty, material;

		if ( object instanceof THREE.Mesh ) {

			if ( geometry instanceof THREE.BufferGeometry ) {

				if ( geometry.verticesNeedUpdate || geometry.elementsNeedUpdate ||
					 geometry.uvsNeedUpdate || geometry.normalsNeedUpdate ||
					 geometry.colorsNeedUpdate || geometry.tangentsNeedUpdate ) {

					setDirectBuffers( geometry, _gl.DYNAMIC_DRAW, !geometry.dynamic );

				}

				geometry.verticesNeedUpdate = false;
				geometry.elementsNeedUpdate = false;
				geometry.uvsNeedUpdate = false;
				geometry.normalsNeedUpdate = false;
				geometry.colorsNeedUpdate = false;
				geometry.tangentsNeedUpdate = false;

			} else {

				// check all geometry groups

				for( var i = 0, il = geometry.geometryGroupsList.length; i < il; i ++ ) {

					geometryGroup = geometry.geometryGroupsList[ i ];

					material = getBufferMaterial( object, geometryGroup );

					if ( geometry.buffersNeedUpdate ) {

						initMeshBuffers( geometryGroup, object );

					}

					customAttributesDirty = material.attributes && areCustomAttributesDirty( material );

					if ( geometry.verticesNeedUpdate || geometry.morphTargetsNeedUpdate || geometry.elementsNeedUpdate ||
						 geometry.uvsNeedUpdate || geometry.normalsNeedUpdate ||
						 geometry.colorsNeedUpdate || geometry.tangentsNeedUpdate || customAttributesDirty ) {

						setMeshBuffers( geometryGroup, object, _gl.DYNAMIC_DRAW, !geometry.dynamic, material );

					}

				}

				geometry.verticesNeedUpdate = false;
				geometry.morphTargetsNeedUpdate = false;
				geometry.elementsNeedUpdate = false;
				geometry.uvsNeedUpdate = false;
				geometry.normalsNeedUpdate = false;
				geometry.colorsNeedUpdate = false;
				geometry.tangentsNeedUpdate = false;

				geometry.buffersNeedUpdate = false;

				material.attributes && clearCustomAttributes( material );

			}

		} else if ( object instanceof THREE.Ribbon ) {

			material = getBufferMaterial( object, geometry );

			customAttributesDirty = material.attributes && areCustomAttributesDirty( material );

			if ( geometry.verticesNeedUpdate || geometry.colorsNeedUpdate || geometry.normalsNeedUpdate || customAttributesDirty ) {

				setRibbonBuffers( geometry, _gl.DYNAMIC_DRAW );

			}

			geometry.verticesNeedUpdate = false;
			geometry.colorsNeedUpdate = false;
			geometry.normalsNeedUpdate = false;

			material.attributes && clearCustomAttributes( material );

		} else if ( object instanceof THREE.Line ) {

			material = getBufferMaterial( object, geometry );

			customAttributesDirty = material.attributes && areCustomAttributesDirty( material );

			if ( geometry.verticesNeedUpdate || geometry.colorsNeedUpdate || geometry.lineDistancesNeedUpdate || customAttributesDirty ) {

				setLineBuffers( geometry, _gl.DYNAMIC_DRAW );

			}

			geometry.verticesNeedUpdate = false;
			geometry.colorsNeedUpdate = false;
			geometry.lineDistancesNeedUpdate = false;

			material.attributes && clearCustomAttributes( material );

		} else if ( object instanceof THREE.ParticleSystem ) {

			if ( geometry instanceof THREE.BufferGeometry ) {

				if ( geometry.verticesNeedUpdate || geometry.colorsNeedUpdate ) {

					setDirectBuffers( geometry, _gl.DYNAMIC_DRAW, !geometry.dynamic );

				}

				geometry.verticesNeedUpdate = false;
				geometry.colorsNeedUpdate = false;

			} else {

				material = getBufferMaterial( object, geometry );

				customAttributesDirty = material.attributes && areCustomAttributesDirty( material );

				if ( geometry.verticesNeedUpdate || geometry.colorsNeedUpdate || object.sortParticles || customAttributesDirty ) {

					setParticleBuffers( geometry, _gl.DYNAMIC_DRAW, object );

				}

				geometry.verticesNeedUpdate = false;
				geometry.colorsNeedUpdate = false;

				material.attributes && clearCustomAttributes( material );

			}

		}

	};

	// Objects updates - custom attributes check

	function areCustomAttributesDirty ( material ) {

		for ( var a in material.attributes ) {

			if ( material.attributes[ a ].needsUpdate ) return true;

		}

		return false;

	};

	function clearCustomAttributes ( material ) {

		for ( var a in material.attributes ) {

			material.attributes[ a ].needsUpdate = false;

		}

	};

	// Objects removal

	function removeObject ( object, scene ) {

		if ( object instanceof THREE.Mesh  ||
			 object instanceof THREE.ParticleSystem ||
			 object instanceof THREE.Ribbon ||
			 object instanceof THREE.Line ) {

			removeInstances( scene.__webglObjects, object );

		} else if ( object instanceof THREE.Sprite ) {

			removeInstancesDirect( scene.__webglSprites, object );

		} else if ( object instanceof THREE.LensFlare ) {

			removeInstancesDirect( scene.__webglFlares, object );

		} else if ( object instanceof THREE.ImmediateRenderObject || object.immediateRenderCallback ) {

			removeInstances( scene.__webglObjectsImmediate, object );

		}

		object.__webglActive = false;

	};

	function removeInstances ( objlist, object ) {

		for ( var o = objlist.length - 1; o >= 0; o -- ) {

			if ( objlist[ o ].object === object ) {

				objlist.splice( o, 1 );

			}

		}

	};

	function removeInstancesDirect ( objlist, object ) {

		for ( var o = objlist.length - 1; o >= 0; o -- ) {

			if ( objlist[ o ] === object ) {

				objlist.splice( o, 1 );

			}

		}

	};

	// Materials

	this.initMaterial = function ( material, lights, fog, object ) {

		var u, a, identifiers, i, parameters, maxLightCount, maxBones, maxShadows, shaderID;

		if ( material instanceof THREE.MeshDepthMaterial ) {

			shaderID = 'depth';

		} else if ( material instanceof THREE.MeshNormalMaterial ) {

			shaderID = 'normal';

		} else if ( material instanceof THREE.MeshBasicMaterial ) {

			shaderID = 'basic';

		} else if ( material instanceof THREE.MeshLambertMaterial ) {

			shaderID = 'lambert';

		} else if ( material instanceof THREE.MeshPhongMaterial ) {

			shaderID = 'phong';

		} else if ( material instanceof THREE.LineBasicMaterial ) {

			shaderID = 'basic';

		} else if ( material instanceof THREE.LineDashedMaterial ) {

			shaderID = 'dashed';

		} else if ( material instanceof THREE.ParticleBasicMaterial ) {

			shaderID = 'particle_basic';

		}

		if ( shaderID ) {

			setMaterialShaders( material, THREE.ShaderLib[ shaderID ] );

		}

		// heuristics to create shader parameters according to lights in the scene
		// (not to blow over maxLights budget)

		maxLightCount = allocateLights( lights );

		maxShadows = allocateShadows( lights );

		maxBones = allocateBones( object );

		parameters = {

			map: !!material.map,
			envMap: !!material.envMap,
			lightMap: !!material.lightMap,
			bumpMap: !!material.bumpMap,
			normalMap: !!material.normalMap,
			specularMap: !!material.specularMap,

			vertexColors: material.vertexColors,

			fog: fog,
			useFog: material.fog,
			fogExp: fog instanceof THREE.FogExp2,

			sizeAttenuation: material.sizeAttenuation,

			skinning: material.skinning,
			maxBones: maxBones,
			useVertexTexture: _supportsBoneTextures && object && object.useVertexTexture,
			boneTextureWidth: object && object.boneTextureWidth,
			boneTextureHeight: object && object.boneTextureHeight,

			morphTargets: material.morphTargets,
			morphNormals: material.morphNormals,
			maxMorphTargets: this.maxMorphTargets,
			maxMorphNormals: this.maxMorphNormals,

			maxDirLights: maxLightCount.directional,
			maxPointLights: maxLightCount.point,
			maxSpotLights: maxLightCount.spot,
			maxHemiLights: maxLightCount.hemi,

			maxShadows: maxShadows,
			shadowMapEnabled: this.shadowMapEnabled && object.receiveShadow,
			shadowMapSoft: this.shadowMapSoft,
			shadowMapDebug: this.shadowMapDebug,
			shadowMapCascade: this.shadowMapCascade,

			alphaTest: material.alphaTest,
			metal: material.metal,
			perPixel: material.perPixel,
			wrapAround: material.wrapAround,
			doubleSided: material.side === THREE.DoubleSide,
			flipSided: material.side === THREE.BackSide

		};

		material.program = buildProgram( shaderID, material.fragmentShader, material.vertexShader, material.uniforms, material.attributes, material.defines, parameters );

		var attributes = material.program.attributes;

		if ( attributes.position >= 0 ) _gl.enableVertexAttribArray( attributes.position );
		if ( attributes.color >= 0 ) _gl.enableVertexAttribArray( attributes.color );
		if ( attributes.normal >= 0 ) _gl.enableVertexAttribArray( attributes.normal );
		if ( attributes.tangent >= 0 ) _gl.enableVertexAttribArray( attributes.tangent );
		if ( attributes.lineDistance >= 0 ) _gl.enableVertexAttribArray( attributes.lineDistance );

		if ( material.skinning &&
			 attributes.skinIndex >= 0 && attributes.skinWeight >= 0 ) {

			_gl.enableVertexAttribArray( attributes.skinIndex );
			_gl.enableVertexAttribArray( attributes.skinWeight );

		}

		if ( material.attributes ) {

			for ( a in material.attributes ) {

				if ( attributes[ a ] !== undefined && attributes[ a ] >= 0 ) _gl.enableVertexAttribArray( attributes[ a ] );

			}

		}

		if ( material.morphTargets ) {

			material.numSupportedMorphTargets = 0;

			var id, base = "morphTarget";

			for ( i = 0; i < this.maxMorphTargets; i ++ ) {

				id = base + i;

				if ( attributes[ id ] >= 0 ) {

					_gl.enableVertexAttribArray( attributes[ id ] );
					material.numSupportedMorphTargets ++;

				}

			}

		}

		if ( material.morphNormals ) {

			material.numSupportedMorphNormals = 0;

			var id, base = "morphNormal";

			for ( i = 0; i < this.maxMorphNormals; i ++ ) {

				id = base + i;

				if ( attributes[ id ] >= 0 ) {

					_gl.enableVertexAttribArray( attributes[ id ] );
					material.numSupportedMorphNormals ++;

				}

			}

		}

		material.uniformsList = [];

		for ( u in material.uniforms ) {

			material.uniformsList.push( [ material.uniforms[ u ], u ] );

		}

	};

	function setMaterialShaders( material, shaders ) {

		material.uniforms = THREE.UniformsUtils.clone( shaders.uniforms );
		material.vertexShader = shaders.vertexShader;
		material.fragmentShader = shaders.fragmentShader;

	};

	function setProgram( camera, lights, fog, material, object ) {

		_usedTextureUnits = 0;

		if ( material.needsUpdate ) {

			if ( material.program ) _this.deallocateMaterial( material );

			_this.initMaterial( material, lights, fog, object );
			material.needsUpdate = false;

		}

		if ( material.morphTargets ) {

			if ( ! object.__webglMorphTargetInfluences ) {

				object.__webglMorphTargetInfluences = new Float32Array( _this.maxMorphTargets );

			}

		}

		var refreshMaterial = false;

		var program = material.program,
			p_uniforms = program.uniforms,
			m_uniforms = material.uniforms;

		if ( program !== _currentProgram ) {

			_gl.useProgram( program );
			_currentProgram = program;

			refreshMaterial = true;

		}

		if ( material.id !== _currentMaterialId ) {

			_currentMaterialId = material.id;
			refreshMaterial = true;

		}

		if ( refreshMaterial || camera !== _currentCamera ) {

			_gl.uniformMatrix4fv( p_uniforms.projectionMatrix, false, camera._projectionMatrixArray );

			if ( camera !== _currentCamera ) _currentCamera = camera;

		}

		// skinning uniforms must be set even if material didn't change
		// auto-setting of texture unit for bone texture must go before other textures
		// not sure why, but otherwise weird things happen

		if ( material.skinning ) {

			if ( _supportsBoneTextures && object.useVertexTexture ) {

				if ( p_uniforms.boneTexture !== null ) {

					var textureUnit = getTextureUnit();

					_gl.uniform1i( p_uniforms.boneTexture, textureUnit );
					_this.setTexture( object.boneTexture, textureUnit );

				}

			} else {

				if ( p_uniforms.boneGlobalMatrices !== null ) {

					_gl.uniformMatrix4fv( p_uniforms.boneGlobalMatrices, false, object.boneMatrices );

				}

			}

		}

		if ( refreshMaterial ) {

			// refresh uniforms common to several materials

			if ( fog && material.fog ) {

				refreshUniformsFog( m_uniforms, fog );

			}

			if ( material instanceof THREE.MeshPhongMaterial ||
				 material instanceof THREE.MeshLambertMaterial ||
				 material.lights ) {

				if ( _lightsNeedUpdate ) {

					setupLights( program, lights );
					_lightsNeedUpdate = false;

				}

				refreshUniformsLights( m_uniforms, _lights );

			}

			if ( material instanceof THREE.MeshBasicMaterial ||
				 material instanceof THREE.MeshLambertMaterial ||
				 material instanceof THREE.MeshPhongMaterial ) {

				refreshUniformsCommon( m_uniforms, material );

			}

			// refresh single material specific uniforms

			if ( material instanceof THREE.LineBasicMaterial ) {

				refreshUniformsLine( m_uniforms, material );

			} else if ( material instanceof THREE.LineDashedMaterial ) {

				refreshUniformsLine( m_uniforms, material );
				refreshUniformsDash( m_uniforms, material );

			} else if ( material instanceof THREE.ParticleBasicMaterial ) {

				refreshUniformsParticle( m_uniforms, material );

			} else if ( material instanceof THREE.MeshPhongMaterial ) {

				refreshUniformsPhong( m_uniforms, material );

			} else if ( material instanceof THREE.MeshLambertMaterial ) {

				refreshUniformsLambert( m_uniforms, material );

			} else if ( material instanceof THREE.MeshDepthMaterial ) {

				m_uniforms.mNear.value = camera.near;
				m_uniforms.mFar.value = camera.far;
				m_uniforms.opacity.value = material.opacity;

			} else if ( material instanceof THREE.MeshNormalMaterial ) {

				m_uniforms.opacity.value = material.opacity;

			}

			if ( object.receiveShadow && ! material._shadowPass ) {

				refreshUniformsShadow( m_uniforms, lights );

			}

			// load common uniforms

			loadUniformsGeneric( program, material.uniformsList );

			// load material specific uniforms
			// (shader material also gets them for the sake of genericity)

			if ( material instanceof THREE.ShaderMaterial ||
				 material instanceof THREE.MeshPhongMaterial ||
				 material.envMap ) {

				if ( p_uniforms.cameraPosition !== null ) {

					var position = camera.matrixWorld.getPosition();
					_gl.uniform3f( p_uniforms.cameraPosition, position.x, position.y, position.z );

				}

			}

			if ( material instanceof THREE.MeshPhongMaterial ||
				 material instanceof THREE.MeshLambertMaterial ||
				 material instanceof THREE.ShaderMaterial ||
				 material.skinning ) {

				if ( p_uniforms.viewMatrix !== null ) {

					_gl.uniformMatrix4fv( p_uniforms.viewMatrix, false, camera._viewMatrixArray );

				}

			}

		}

		loadUniformsMatrices( p_uniforms, object );

		if ( p_uniforms.modelMatrix !== null ) {

			_gl.uniformMatrix4fv( p_uniforms.modelMatrix, false, object.matrixWorld.elements );

		}

		return program;

	};

	// Uniforms (refresh uniforms objects)

	function refreshUniformsCommon ( uniforms, material ) {

		uniforms.opacity.value = material.opacity;

		if ( _this.gammaInput ) {

			uniforms.diffuse.value.copyGammaToLinear( material.color );

		} else {

			uniforms.diffuse.value = material.color;

		}

		uniforms.map.value = material.map;
		uniforms.lightMap.value = material.lightMap;
		uniforms.specularMap.value = material.specularMap;

		if ( material.bumpMap ) {

			uniforms.bumpMap.value = material.bumpMap;
			uniforms.bumpScale.value = material.bumpScale;

		}

		if ( material.normalMap ) {

			uniforms.normalMap.value = material.normalMap;
			uniforms.normalScale.value.copy( material.normalScale );

		}

		// uv repeat and offset setting priorities
		//	1. color map
		//	2. specular map
		//	3. normal map
		//	4. bump map

		var uvScaleMap;

		if ( material.map ) {

			uvScaleMap = material.map;

		} else if ( material.specularMap ) {

			uvScaleMap = material.specularMap;

		} else if ( material.normalMap ) {

			uvScaleMap = material.normalMap;

		} else if ( material.bumpMap ) {

			uvScaleMap = material.bumpMap;

		}

		if ( uvScaleMap !== undefined ) {

			var offset = uvScaleMap.offset;
			var repeat = uvScaleMap.repeat;

			uniforms.offsetRepeat.value.set( offset.x, offset.y, repeat.x, repeat.y );

		}

		uniforms.envMap.value = material.envMap;
		uniforms.flipEnvMap.value = ( material.envMap instanceof THREE.WebGLRenderTargetCube ) ? 1 : -1;

		if ( _this.gammaInput ) {

			//uniforms.reflectivity.value = material.reflectivity * material.reflectivity;
			uniforms.reflectivity.value = material.reflectivity;

		} else {

			uniforms.reflectivity.value = material.reflectivity;

		}

		uniforms.refractionRatio.value = material.refractionRatio;
		uniforms.combine.value = material.combine;
		uniforms.useRefract.value = material.envMap && material.envMap.mapping instanceof THREE.CubeRefractionMapping;

	};

	function refreshUniformsLine ( uniforms, material ) {

		uniforms.diffuse.value = material.color;
		uniforms.opacity.value = material.opacity;

	};

	function refreshUniformsDash ( uniforms, material ) {

		uniforms.dashSize.value = material.dashSize;
		uniforms.totalSize.value = material.dashSize + material.gapSize;
		uniforms.scale.value = material.scale;

	};

	function refreshUniformsParticle ( uniforms, material ) {

		uniforms.psColor.value = material.color;
		uniforms.opacity.value = material.opacity;
		uniforms.size.value = material.size;
		uniforms.scale.value = _canvas.height / 2.0; // TODO: Cache this.

		uniforms.map.value = material.map;

	};

	function refreshUniformsFog ( uniforms, fog ) {

		uniforms.fogColor.value = fog.color;

		if ( fog instanceof THREE.Fog ) {

			uniforms.fogNear.value = fog.near;
			uniforms.fogFar.value = fog.far;

		} else if ( fog instanceof THREE.FogExp2 ) {

			uniforms.fogDensity.value = fog.density;

		}

	};

	function refreshUniformsPhong ( uniforms, material ) {

		uniforms.shininess.value = material.shininess;

		if ( _this.gammaInput ) {

			uniforms.ambient.value.copyGammaToLinear( material.ambient );
			uniforms.emissive.value.copyGammaToLinear( material.emissive );
			uniforms.specular.value.copyGammaToLinear( material.specular );

		} else {

			uniforms.ambient.value = material.ambient;
			uniforms.emissive.value = material.emissive;
			uniforms.specular.value = material.specular;

		}

		if ( material.wrapAround ) {

			uniforms.wrapRGB.value.copy( material.wrapRGB );

		}

	};

	function refreshUniformsLambert ( uniforms, material ) {

		if ( _this.gammaInput ) {

			uniforms.ambient.value.copyGammaToLinear( material.ambient );
			uniforms.emissive.value.copyGammaToLinear( material.emissive );

		} else {

			uniforms.ambient.value = material.ambient;
			uniforms.emissive.value = material.emissive;

		}

		if ( material.wrapAround ) {

			uniforms.wrapRGB.value.copy( material.wrapRGB );

		}

	};

	function refreshUniformsLights ( uniforms, lights ) {

		uniforms.ambientLightColor.value = lights.ambient;

		uniforms.directionalLightColor.value = lights.directional.colors;
		uniforms.directionalLightDirection.value = lights.directional.positions;

		uniforms.pointLightColor.value = lights.point.colors;
		uniforms.pointLightPosition.value = lights.point.positions;
		uniforms.pointLightDistance.value = lights.point.distances;

		uniforms.spotLightColor.value = lights.spot.colors;
		uniforms.spotLightPosition.value = lights.spot.positions;
		uniforms.spotLightDistance.value = lights.spot.distances;
		uniforms.spotLightDirection.value = lights.spot.directions;
		uniforms.spotLightAngleCos.value = lights.spot.anglesCos;
		uniforms.spotLightExponent.value = lights.spot.exponents;

		uniforms.hemisphereLightSkyColor.value = lights.hemi.skyColors;
		uniforms.hemisphereLightGroundColor.value = lights.hemi.groundColors;
		uniforms.hemisphereLightDirection.value = lights.hemi.positions;

	};

	function refreshUniformsShadow ( uniforms, lights ) {

		if ( uniforms.shadowMatrix ) {

			var j = 0;

			for ( var i = 0, il = lights.length; i < il; i ++ ) {

				var light = lights[ i ];

				if ( ! light.castShadow ) continue;

				if ( light instanceof THREE.SpotLight || ( light instanceof THREE.DirectionalLight && ! light.shadowCascade ) ) {

					uniforms.shadowMap.value[ j ] = light.shadowMap;
					uniforms.shadowMapSize.value[ j ] = light.shadowMapSize;

					uniforms.shadowMatrix.value[ j ] = light.shadowMatrix;

					uniforms.shadowDarkness.value[ j ] = light.shadowDarkness;
					uniforms.shadowBias.value[ j ] = light.shadowBias;

					j ++;

				}

			}

		}

	};

	// Uniforms (load to GPU)

	function loadUniformsMatrices ( uniforms, object ) {

		_gl.uniformMatrix4fv( uniforms.modelViewMatrix, false, object._modelViewMatrix.elements );

		if ( uniforms.normalMatrix ) {

			_gl.uniformMatrix3fv( uniforms.normalMatrix, false, object._normalMatrix.elements );

		}

	};

	function getTextureUnit() {

		var textureUnit = _usedTextureUnits;

		if ( textureUnit >= _maxTextures ) {

			console.warn( "Trying to use " + textureUnit + " texture units while this GPU supports only " + _maxTextures );

		}

		_usedTextureUnits += 1;

		return textureUnit;

	};

	function loadUniformsGeneric ( program, uniforms ) {

		var uniform, value, type, location, texture, textureUnit, i, il, j, jl, offset;

		for ( j = 0, jl = uniforms.length; j < jl; j ++ ) {

			location = program.uniforms[ uniforms[ j ][ 1 ] ];
			if ( !location ) continue;

			uniform = uniforms[ j ][ 0 ];

			type = uniform.type;
			value = uniform.value;

			if ( type === "i" ) { // single integer

				_gl.uniform1i( location, value );

			} else if ( type === "f" ) { // single float

				_gl.uniform1f( location, value );

			} else if ( type === "v2" ) { // single THREE.Vector2

				_gl.uniform2f( location, value.x, value.y );

			} else if ( type === "v3" ) { // single THREE.Vector3

				_gl.uniform3f( location, value.x, value.y, value.z );

			} else if ( type === "v4" ) { // single THREE.Vector4

				_gl.uniform4f( location, value.x, value.y, value.z, value.w );

			} else if ( type === "c" ) { // single THREE.Color

				_gl.uniform3f( location, value.r, value.g, value.b );

			} else if ( type === "iv1" ) { // flat array of integers (JS or typed array)

				_gl.uniform1iv( location, value );

			} else if ( type === "iv" ) { // flat array of integers with 3 x N size (JS or typed array)

				_gl.uniform3iv( location, value );

			} else if ( type === "fv1" ) { // flat array of floats (JS or typed array)

				_gl.uniform1fv( location, value );

			} else if ( type === "fv" ) { // flat array of floats with 3 x N size (JS or typed array)

				_gl.uniform3fv( location, value );

			} else if ( type === "v2v" ) { // array of THREE.Vector2

				if ( uniform._array === undefined ) {

					uniform._array = new Float32Array( 2 * value.length );

				}

				for ( i = 0, il = value.length; i < il; i ++ ) {

					offset = i * 2;

					uniform._array[ offset ] 	 = value[ i ].x;
					uniform._array[ offset + 1 ] = value[ i ].y;

				}

				_gl.uniform2fv( location, uniform._array );

			} else if ( type === "v3v" ) { // array of THREE.Vector3

				if ( uniform._array === undefined ) {

					uniform._array = new Float32Array( 3 * value.length );

				}

				for ( i = 0, il = value.length; i < il; i ++ ) {

					offset = i * 3;

					uniform._array[ offset ] 	 = value[ i ].x;
					uniform._array[ offset + 1 ] = value[ i ].y;
					uniform._array[ offset + 2 ] = value[ i ].z;

				}

				_gl.uniform3fv( location, uniform._array );

			} else if ( type === "v4v" ) { // array of THREE.Vector4

				if ( uniform._array === undefined ) {

					uniform._array = new Float32Array( 4 * value.length );

				}

				for ( i = 0, il = value.length; i < il; i ++ ) {

					offset = i * 4;

					uniform._array[ offset ] 	 = value[ i ].x;
					uniform._array[ offset + 1 ] = value[ i ].y;
					uniform._array[ offset + 2 ] = value[ i ].z;
					uniform._array[ offset + 3 ] = value[ i ].w;

				}

				_gl.uniform4fv( location, uniform._array );

			} else if ( type === "m4") { // single THREE.Matrix4

				if ( uniform._array === undefined ) {

					uniform._array = new Float32Array( 16 );

				}

				value.flattenToArray( uniform._array );
				_gl.uniformMatrix4fv( location, false, uniform._array );

			} else if ( type === "m4v" ) { // array of THREE.Matrix4

				if ( uniform._array === undefined ) {

					uniform._array = new Float32Array( 16 * value.length );

				}

				for ( i = 0, il = value.length; i < il; i ++ ) {

					value[ i ].flattenToArrayOffset( uniform._array, i * 16 );

				}

				_gl.uniformMatrix4fv( location, false, uniform._array );

			} else if ( type === "t" ) { // single THREE.Texture (2d or cube)

				texture = value;
				textureUnit = getTextureUnit();

				_gl.uniform1i( location, textureUnit );

				if ( !texture ) continue;

				if ( texture.image instanceof Array && texture.image.length === 6 ) {

					setCubeTexture( texture, textureUnit );

				} else if ( texture instanceof THREE.WebGLRenderTargetCube ) {

					setCubeTextureDynamic( texture, textureUnit );

				} else {

					_this.setTexture( texture, textureUnit );

				}

			} else if ( type === "tv" ) { // array of THREE.Texture (2d)

				if ( uniform._array === undefined ) {

					uniform._array = [];

				}

				for( i = 0, il = uniform.value.length; i < il; i ++ ) {

					uniform._array[ i ] = getTextureUnit();

				}

				_gl.uniform1iv( location, uniform._array );

				for( i = 0, il = uniform.value.length; i < il; i ++ ) {

					texture = uniform.value[ i ];
					textureUnit = uniform._array[ i ];

					if ( !texture ) continue;

					_this.setTexture( texture, textureUnit );

				}

			}

		}

	};

	function setupMatrices ( object, camera ) {

		object._modelViewMatrix.multiply( camera.matrixWorldInverse, object.matrixWorld );

		object._normalMatrix.getInverse( object._modelViewMatrix );
		object._normalMatrix.transpose();

	};

	//

	function setColorGamma( array, offset, color, intensitySq ) {

		array[ offset ]     = color.r * color.r * intensitySq;
		array[ offset + 1 ] = color.g * color.g * intensitySq;
		array[ offset + 2 ] = color.b * color.b * intensitySq;

	};

	function setColorLinear( array, offset, color, intensity ) {

		array[ offset ]     = color.r * intensity;
		array[ offset + 1 ] = color.g * intensity;
		array[ offset + 2 ] = color.b * intensity;

	};

	function setupLights ( program, lights ) {

		var l, ll, light, n,
		r = 0, g = 0, b = 0,
		color, skyColor, groundColor,
		intensity,  intensitySq,
		position,
		distance,

		zlights = _lights,

		dirColors = zlights.directional.colors,
		dirPositions = zlights.directional.positions,

		pointColors = zlights.point.colors,
		pointPositions = zlights.point.positions,
		pointDistances = zlights.point.distances,

		spotColors = zlights.spot.colors,
		spotPositions = zlights.spot.positions,
		spotDistances = zlights.spot.distances,
		spotDirections = zlights.spot.directions,
		spotAnglesCos = zlights.spot.anglesCos,
		spotExponents = zlights.spot.exponents,

		hemiSkyColors = zlights.hemi.skyColors,
		hemiGroundColors = zlights.hemi.groundColors,
		hemiPositions = zlights.hemi.positions,

		dirLength = 0,
		pointLength = 0,
		spotLength = 0,
		hemiLength = 0,

		dirCount = 0,
		pointCount = 0,
		spotCount = 0,
		hemiCount = 0,

		dirOffset = 0,
		pointOffset = 0,
		spotOffset = 0,
		hemiOffset = 0;

		for ( l = 0, ll = lights.length; l < ll; l ++ ) {

			light = lights[ l ];

			if ( light.onlyShadow ) continue;

			color = light.color;
			intensity = light.intensity;
			distance = light.distance;

			if ( light instanceof THREE.AmbientLight ) {

				if ( ! light.visible ) continue;

				if ( _this.gammaInput ) {

					r += color.r * color.r;
					g += color.g * color.g;
					b += color.b * color.b;

				} else {

					r += color.r;
					g += color.g;
					b += color.b;

				}

			} else if ( light instanceof THREE.DirectionalLight ) {

				dirCount += 1;

				if ( ! light.visible ) continue;

				dirOffset = dirLength * 3;

				if ( _this.gammaInput ) {

					setColorGamma( dirColors, dirOffset, color, intensity * intensity );

				} else {

					setColorLinear( dirColors, dirOffset, color, intensity );

				}

				_direction.copy( light.matrixWorld.getPosition() );
				_direction.subSelf( light.target.matrixWorld.getPosition() );
				_direction.normalize();

				dirPositions[ dirOffset ]     = _direction.x;
				dirPositions[ dirOffset + 1 ] = _direction.y;
				dirPositions[ dirOffset + 2 ] = _direction.z;

				dirLength += 1;

			} else if ( light instanceof THREE.PointLight ) {

				pointCount += 1;

				if ( ! light.visible ) continue;

				pointOffset = pointLength * 3;

				if ( _this.gammaInput ) {

					setColorGamma( pointColors, pointOffset, color, intensity * intensity );

				} else {

					setColorLinear( pointColors, pointOffset, color, intensity );

				}

				position = light.matrixWorld.getPosition();

				pointPositions[ pointOffset ]     = position.x;
				pointPositions[ pointOffset + 1 ] = position.y;
				pointPositions[ pointOffset + 2 ] = position.z;

				pointDistances[ pointLength ] = distance;

				pointLength += 1;

			} else if ( light instanceof THREE.SpotLight ) {

				spotCount += 1;

				if ( ! light.visible ) continue;

				spotOffset = spotLength * 3;

				if ( _this.gammaInput ) {

					setColorGamma( spotColors, spotOffset, color, intensity * intensity );

				} else {

					setColorLinear( spotColors, spotOffset, color, intensity );

				}

				position = light.matrixWorld.getPosition();

				spotPositions[ spotOffset ]     = position.x;
				spotPositions[ spotOffset + 1 ] = position.y;
				spotPositions[ spotOffset + 2 ] = position.z;

				spotDistances[ spotLength ] = distance;

				_direction.copy( position );
				_direction.subSelf( light.target.matrixWorld.getPosition() );
				_direction.normalize();

				spotDirections[ spotOffset ]     = _direction.x;
				spotDirections[ spotOffset + 1 ] = _direction.y;
				spotDirections[ spotOffset + 2 ] = _direction.z;

				spotAnglesCos[ spotLength ] = Math.cos( light.angle );
				spotExponents[ spotLength ] = light.exponent;

				spotLength += 1;

			} else if ( light instanceof THREE.HemisphereLight ) {

				hemiCount += 1;

				if ( ! light.visible ) continue;

				skyColor = light.color;
				groundColor = light.groundColor;

				hemiOffset = hemiLength * 3;

				if ( _this.gammaInput ) {

					intensitySq = intensity * intensity;

					setColorGamma( hemiSkyColors, hemiOffset, skyColor, intensitySq );
					setColorGamma( hemiGroundColors, hemiOffset, groundColor, intensitySq );

				} else {

					setColorLinear( hemiSkyColors, hemiOffset, skyColor, intensity );
					setColorLinear( hemiGroundColors, hemiOffset, groundColor, intensity );

				}

				_direction.copy( light.matrixWorld.getPosition() );
				_direction.normalize();

				hemiPositions[ hemiOffset ]     = _direction.x;
				hemiPositions[ hemiOffset + 1 ] = _direction.y;
				hemiPositions[ hemiOffset + 2 ] = _direction.z;

				hemiLength += 1;

			}

		}

		// null eventual remains from removed lights
		// (this is to avoid if in shader)

		for ( l = dirLength * 3, ll = Math.max( dirColors.length, dirCount * 3 ); l < ll; l ++ ) dirColors[ l ] = 0.0;
		for ( l = dirLength * 3, ll = Math.max( dirPositions.length, dirCount * 3 ); l < ll; l ++ ) dirPositions[ l ] = 0.0;

		for ( l = pointLength * 3, ll = Math.max( pointColors.length, pointCount * 3 ); l < ll; l ++ ) pointColors[ l ] = 0.0;
		for ( l = pointLength * 3, ll = Math.max( pointPositions.length, pointCount * 3 ); l < ll; l ++ ) pointPositions[ l ] = 0.0;
		for ( l = pointLength, ll = Math.max( pointDistances.length, pointCount ); l < ll; l ++ ) pointDistances[ l ] = 0.0;

		for ( l = spotLength * 3, ll = Math.max( spotColors.length, spotCount * 3 ); l < ll; l ++ ) spotColors[ l ] = 0.0;
		for ( l = spotLength * 3, ll = Math.max( spotPositions.length, spotCount * 3 ); l < ll; l ++ ) spotPositions[ l ] = 0.0;
		for ( l = spotLength * 3, ll = Math.max( spotDirections.length, spotCount * 3 ); l < ll; l ++ ) spotDirections[ l ] = 0.0;
		for ( l = spotLength, ll = Math.max( spotAnglesCos.length, spotCount ); l < ll; l ++ ) spotAnglesCos[ l ] = 0.0;
		for ( l = spotLength, ll = Math.max( spotExponents.length, spotCount ); l < ll; l ++ ) spotExponents[ l ] = 0.0;
		for ( l = spotLength, ll = Math.max( spotDistances.length, spotCount ); l < ll; l ++ ) spotDistances[ l ] = 0.0;

		for ( l = hemiLength * 3, ll = Math.max( hemiSkyColors.length, hemiCount * 3 ); l < ll; l ++ ) hemiSkyColors[ l ] = 0.0;
		for ( l = hemiLength * 3, ll = Math.max( hemiGroundColors.length, hemiCount * 3 ); l < ll; l ++ ) hemiGroundColors[ l ] = 0.0;
		for ( l = hemiLength * 3, ll = Math.max( hemiPositions.length, hemiCount * 3 ); l < ll; l ++ ) hemiPositions[ l ] = 0.0;

		zlights.directional.length = dirLength;
		zlights.point.length = pointLength;
		zlights.spot.length = spotLength;
		zlights.hemi.length = hemiLength;

		zlights.ambient[ 0 ] = r;
		zlights.ambient[ 1 ] = g;
		zlights.ambient[ 2 ] = b;

	};

	// GL state setting

	this.setFaceCulling = function ( cullFace, frontFace ) {

		if ( cullFace ) {

			if ( !frontFace || frontFace === "ccw" ) {

				_gl.frontFace( _gl.CCW );

			} else {

				_gl.frontFace( _gl.CW );

			}

			if( cullFace === "back" ) {

				_gl.cullFace( _gl.BACK );

			} else if( cullFace === "front" ) {

				_gl.cullFace( _gl.FRONT );

			} else {

				_gl.cullFace( _gl.FRONT_AND_BACK );

			}

			_gl.enable( _gl.CULL_FACE );

		} else {

			_gl.disable( _gl.CULL_FACE );

		}

	};

	this.setMaterialFaces = function ( material ) {

		var doubleSided = material.side === THREE.DoubleSide;
		var flipSided = material.side === THREE.BackSide;

		if ( _oldDoubleSided !== doubleSided ) {

			if ( doubleSided ) {

				_gl.disable( _gl.CULL_FACE );

			} else {

				_gl.enable( _gl.CULL_FACE );

			}

			_oldDoubleSided = doubleSided;

		}

		if ( _oldFlipSided !== flipSided ) {

			if ( flipSided ) {

				_gl.frontFace( _gl.CW );

			} else {

				_gl.frontFace( _gl.CCW );

			}

			_oldFlipSided = flipSided;

		}

	};

	this.setDepthTest = function ( depthTest ) {

		if ( _oldDepthTest !== depthTest ) {

			if ( depthTest ) {

				_gl.enable( _gl.DEPTH_TEST );

			} else {

				_gl.disable( _gl.DEPTH_TEST );

			}

			_oldDepthTest = depthTest;

		}

	};

	this.setDepthWrite = function ( depthWrite ) {

		if ( _oldDepthWrite !== depthWrite ) {

			_gl.depthMask( depthWrite );
			_oldDepthWrite = depthWrite;

		}

	};

	function setLineWidth ( width ) {

		if ( width !== _oldLineWidth ) {

			_gl.lineWidth( width );

			_oldLineWidth = width;

		}

	};

	function setPolygonOffset ( polygonoffset, factor, units ) {

		if ( _oldPolygonOffset !== polygonoffset ) {

			if ( polygonoffset ) {

				_gl.enable( _gl.POLYGON_OFFSET_FILL );

			} else {

				_gl.disable( _gl.POLYGON_OFFSET_FILL );

			}

			_oldPolygonOffset = polygonoffset;

		}

		if ( polygonoffset && ( _oldPolygonOffsetFactor !== factor || _oldPolygonOffsetUnits !== units ) ) {

			_gl.polygonOffset( factor, units );

			_oldPolygonOffsetFactor = factor;
			_oldPolygonOffsetUnits = units;

		}

	};

	this.setBlending = function ( blending, blendEquation, blendSrc, blendDst ) {

		if ( blending !== _oldBlending ) {

			if ( blending === THREE.NoBlending ) {

				_gl.disable( _gl.BLEND );

			} else if ( blending === THREE.AdditiveBlending ) {

				_gl.enable( _gl.BLEND );
				_gl.blendEquation( _gl.FUNC_ADD );
				_gl.blendFunc( _gl.SRC_ALPHA, _gl.ONE );

			} else if ( blending === THREE.SubtractiveBlending ) {

				// TODO: Find blendFuncSeparate() combination
				_gl.enable( _gl.BLEND );
				_gl.blendEquation( _gl.FUNC_ADD );
				_gl.blendFunc( _gl.ZERO, _gl.ONE_MINUS_SRC_COLOR );

			} else if ( blending === THREE.MultiplyBlending ) {

				// TODO: Find blendFuncSeparate() combination
				_gl.enable( _gl.BLEND );
				_gl.blendEquation( _gl.FUNC_ADD );
				_gl.blendFunc( _gl.ZERO, _gl.SRC_COLOR );

			} else if ( blending === THREE.CustomBlending ) {

				_gl.enable( _gl.BLEND );

			} else {

				_gl.enable( _gl.BLEND );
				_gl.blendEquationSeparate( _gl.FUNC_ADD, _gl.FUNC_ADD );
				_gl.blendFuncSeparate( _gl.SRC_ALPHA, _gl.ONE_MINUS_SRC_ALPHA, _gl.ONE, _gl.ONE_MINUS_SRC_ALPHA );

			}

			_oldBlending = blending;

		}

		if ( blending === THREE.CustomBlending ) {

			if ( blendEquation !== _oldBlendEquation ) {

				_gl.blendEquation( paramThreeToGL( blendEquation ) );

				_oldBlendEquation = blendEquation;

			}

			if ( blendSrc !== _oldBlendSrc || blendDst !== _oldBlendDst ) {

				_gl.blendFunc( paramThreeToGL( blendSrc ), paramThreeToGL( blendDst ) );

				_oldBlendSrc = blendSrc;
				_oldBlendDst = blendDst;

			}

		} else {

			_oldBlendEquation = null;
			_oldBlendSrc = null;
			_oldBlendDst = null;

		}

	};

	// Defines

	function generateDefines ( defines ) {

		var value, chunk, chunks = [];

		for ( var d in defines ) {

			value = defines[ d ];
			if ( value === false ) continue;

			chunk = "#define " + d + " " + value;
			chunks.push( chunk );

		}

		return chunks.join( "\n" );

	};

	// Shaders

	function buildProgram ( shaderID, fragmentShader, vertexShader, uniforms, attributes, defines, parameters ) {

		var p, pl, d, program, code;
		var chunks = [];

		// Generate code

		if ( shaderID ) {

			chunks.push( shaderID );

		} else {

			chunks.push( fragmentShader );
			chunks.push( vertexShader );

		}

		for ( d in defines ) {

			chunks.push( d );
			chunks.push( defines[ d ] );

		}

		for ( p in parameters ) {

			chunks.push( p );
			chunks.push( parameters[ p ] );

		}

		code = chunks.join();

		// Check if code has been already compiled

		for ( p = 0, pl = _programs.length; p < pl; p ++ ) {

			var programInfo = _programs[ p ];

			if ( programInfo.code === code ) {

				//console.log( "Code already compiled." /*: \n\n" + code*/ );

				programInfo.usedTimes ++;

				return programInfo.program;

			}

		}

		//console.log( "building new program " );

		//

		var customDefines = generateDefines( defines );

		//

		program = _gl.createProgram();

		var prefix_vertex = [

			"precision " + _precision + " float;",

			customDefines,

			_supportsVertexTextures ? "#define VERTEX_TEXTURES" : "",

			_this.gammaInput ? "#define GAMMA_INPUT" : "",
			_this.gammaOutput ? "#define GAMMA_OUTPUT" : "",
			_this.physicallyBasedShading ? "#define PHYSICALLY_BASED_SHADING" : "",

			"#define MAX_DIR_LIGHTS " + parameters.maxDirLights,
			"#define MAX_POINT_LIGHTS " + parameters.maxPointLights,
			"#define MAX_SPOT_LIGHTS " + parameters.maxSpotLights,
			"#define MAX_HEMI_LIGHTS " + parameters.maxHemiLights,

			"#define MAX_SHADOWS " + parameters.maxShadows,

			"#define MAX_BONES " + parameters.maxBones,

			parameters.map ? "#define USE_MAP" : "",
			parameters.envMap ? "#define USE_ENVMAP" : "",
			parameters.lightMap ? "#define USE_LIGHTMAP" : "",
			parameters.bumpMap ? "#define USE_BUMPMAP" : "",
			parameters.normalMap ? "#define USE_NORMALMAP" : "",
			parameters.specularMap ? "#define USE_SPECULARMAP" : "",
			parameters.vertexColors ? "#define USE_COLOR" : "",

			parameters.skinning ? "#define USE_SKINNING" : "",
			parameters.useVertexTexture ? "#define BONE_TEXTURE" : "",
			parameters.boneTextureWidth ? "#define N_BONE_PIXEL_X " + parameters.boneTextureWidth.toFixed( 1 ) : "",
			parameters.boneTextureHeight ? "#define N_BONE_PIXEL_Y " + parameters.boneTextureHeight.toFixed( 1 ) : "",

			parameters.morphTargets ? "#define USE_MORPHTARGETS" : "",
			parameters.morphNormals ? "#define USE_MORPHNORMALS" : "",
			parameters.perPixel ? "#define PHONG_PER_PIXEL" : "",
			parameters.wrapAround ? "#define WRAP_AROUND" : "",
			parameters.doubleSided ? "#define DOUBLE_SIDED" : "",
			parameters.flipSided ? "#define FLIP_SIDED" : "",

			parameters.shadowMapEnabled ? "#define USE_SHADOWMAP" : "",
			parameters.shadowMapSoft ? "#define SHADOWMAP_SOFT" : "",
			parameters.shadowMapDebug ? "#define SHADOWMAP_DEBUG" : "",
			parameters.shadowMapCascade ? "#define SHADOWMAP_CASCADE" : "",

			parameters.sizeAttenuation ? "#define USE_SIZEATTENUATION" : "",

			"uniform mat4 modelMatrix;",
			"uniform mat4 modelViewMatrix;",
			"uniform mat4 projectionMatrix;",
			"uniform mat4 viewMatrix;",
			"uniform mat3 normalMatrix;",
			"uniform vec3 cameraPosition;",

			"attribute vec3 position;",
			"attribute vec3 normal;",
			"attribute vec2 uv;",
			"attribute vec2 uv2;",

			"#ifdef USE_COLOR",

				"attribute vec3 color;",

			"#endif",

			"#ifdef USE_MORPHTARGETS",

				"attribute vec3 morphTarget0;",
				"attribute vec3 morphTarget1;",
				"attribute vec3 morphTarget2;",
				"attribute vec3 morphTarget3;",

				"#ifdef USE_MORPHNORMALS",

					"attribute vec3 morphNormal0;",
					"attribute vec3 morphNormal1;",
					"attribute vec3 morphNormal2;",
					"attribute vec3 morphNormal3;",

				"#else",

					"attribute vec3 morphTarget4;",
					"attribute vec3 morphTarget5;",
					"attribute vec3 morphTarget6;",
					"attribute vec3 morphTarget7;",

				"#endif",

			"#endif",

			"#ifdef USE_SKINNING",

				"attribute vec4 skinIndex;",
				"attribute vec4 skinWeight;",

			"#endif",

			""

		].join("\n");

		var prefix_fragment = [

			"precision " + _precision + " float;",

			( parameters.bumpMap || parameters.normalMap ) ? "#extension GL_OES_standard_derivatives : enable" : "",

			customDefines,

			"#define MAX_DIR_LIGHTS " + parameters.maxDirLights,
			"#define MAX_POINT_LIGHTS " + parameters.maxPointLights,
			"#define MAX_SPOT_LIGHTS " + parameters.maxSpotLights,
			"#define MAX_HEMI_LIGHTS " + parameters.maxHemiLights,

			"#define MAX_SHADOWS " + parameters.maxShadows,

			parameters.alphaTest ? "#define ALPHATEST " + parameters.alphaTest: "",

			_this.gammaInput ? "#define GAMMA_INPUT" : "",
			_this.gammaOutput ? "#define GAMMA_OUTPUT" : "",
			_this.physicallyBasedShading ? "#define PHYSICALLY_BASED_SHADING" : "",

			( parameters.useFog && parameters.fog ) ? "#define USE_FOG" : "",
			( parameters.useFog && parameters.fogExp ) ? "#define FOG_EXP2" : "",

			parameters.map ? "#define USE_MAP" : "",
			parameters.envMap ? "#define USE_ENVMAP" : "",
			parameters.lightMap ? "#define USE_LIGHTMAP" : "",
			parameters.bumpMap ? "#define USE_BUMPMAP" : "",
			parameters.normalMap ? "#define USE_NORMALMAP" : "",
			parameters.specularMap ? "#define USE_SPECULARMAP" : "",
			parameters.vertexColors ? "#define USE_COLOR" : "",

			parameters.metal ? "#define METAL" : "",
			parameters.perPixel ? "#define PHONG_PER_PIXEL" : "",
			parameters.wrapAround ? "#define WRAP_AROUND" : "",
			parameters.doubleSided ? "#define DOUBLE_SIDED" : "",
			parameters.flipSided ? "#define FLIP_SIDED" : "",

			parameters.shadowMapEnabled ? "#define USE_SHADOWMAP" : "",
			parameters.shadowMapSoft ? "#define SHADOWMAP_SOFT" : "",
			parameters.shadowMapDebug ? "#define SHADOWMAP_DEBUG" : "",
			parameters.shadowMapCascade ? "#define SHADOWMAP_CASCADE" : "",

			"uniform mat4 viewMatrix;",
			"uniform vec3 cameraPosition;",
			""

		].join("\n");

		var glFragmentShader = getShader( "fragment", prefix_fragment + fragmentShader );
		var glVertexShader = getShader( "vertex", prefix_vertex + vertexShader );

		_gl.attachShader( program, glVertexShader );
		_gl.attachShader( program, glFragmentShader );

		_gl.linkProgram( program );

		if ( !_gl.getProgramParameter( program, _gl.LINK_STATUS ) ) {

			console.error( "Could not initialise shader\n" + "VALIDATE_STATUS: " + _gl.getProgramParameter( program, _gl.VALIDATE_STATUS ) + ", gl error [" + _gl.getError() + "]" );

		}

		// clean up

		_gl.deleteShader( glFragmentShader );
		_gl.deleteShader( glVertexShader );

		//console.log( prefix_fragment + fragmentShader );
		//console.log( prefix_vertex + vertexShader );

		program.uniforms = {};
		program.attributes = {};

		var identifiers, u, a, i;

		// cache uniform locations

		identifiers = [

			'viewMatrix', 'modelViewMatrix', 'projectionMatrix', 'normalMatrix', 'modelMatrix', 'cameraPosition',
			'morphTargetInfluences'

		];

		if ( parameters.useVertexTexture ) {

			identifiers.push( 'boneTexture' );

		} else {

			identifiers.push( 'boneGlobalMatrices' );

		}

		for ( u in uniforms ) {

			identifiers.push( u );

		}

		cacheUniformLocations( program, identifiers );

		// cache attributes locations

		identifiers = [

			"position", "normal", "uv", "uv2", "tangent", "color",
			"skinIndex", "skinWeight", "lineDistance"

		];

		for ( i = 0; i < parameters.maxMorphTargets; i ++ ) {

			identifiers.push( "morphTarget" + i );

		}

		for ( i = 0; i < parameters.maxMorphNormals; i ++ ) {

			identifiers.push( "morphNormal" + i );

		}

		for ( a in attributes ) {

			identifiers.push( a );

		}

		cacheAttributeLocations( program, identifiers );

		program.id = _programs_counter ++;

		_programs.push( { program: program, code: code, usedTimes: 1 } );

		_this.info.memory.programs = _programs.length;

		return program;

	};

	// Shader parameters cache

	function cacheUniformLocations ( program, identifiers ) {

		var i, l, id;

		for( i = 0, l = identifiers.length; i < l; i ++ ) {

			id = identifiers[ i ];
			program.uniforms[ id ] = _gl.getUniformLocation( program, id );

		}

	};

	function cacheAttributeLocations ( program, identifiers ) {

		var i, l, id;

		for( i = 0, l = identifiers.length; i < l; i ++ ) {

			id = identifiers[ i ];
			program.attributes[ id ] = _gl.getAttribLocation( program, id );

		}

	};

	function addLineNumbers ( string ) {

		var chunks = string.split( "\n" );

		for ( var i = 0, il = chunks.length; i < il; i ++ ) {

			// Chrome reports shader errors on lines
			// starting counting from 1

			chunks[ i ] = ( i + 1 ) + ": " + chunks[ i ];

		}

		return chunks.join( "\n" );

	};

	function getShader ( type, string ) {

		var shader;

		if ( type === "fragment" ) {

			shader = _gl.createShader( _gl.FRAGMENT_SHADER );

		} else if ( type === "vertex" ) {

			shader = _gl.createShader( _gl.VERTEX_SHADER );

		}

		_gl.shaderSource( shader, string );
		_gl.compileShader( shader );

		if ( !_gl.getShaderParameter( shader, _gl.COMPILE_STATUS ) ) {

			console.error( _gl.getShaderInfoLog( shader ) );
			console.error( addLineNumbers( string ) );
			return null;

		}

		return shader;

	};

	// Textures


	function isPowerOfTwo ( value ) {

		return ( value & ( value - 1 ) ) === 0;

	};

	function setTextureParameters ( textureType, texture, isImagePowerOfTwo ) {

		if ( isImagePowerOfTwo ) {

			_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, paramThreeToGL( texture.wrapS ) );
			_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, paramThreeToGL( texture.wrapT ) );

			_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, paramThreeToGL( texture.magFilter ) );
			_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, paramThreeToGL( texture.minFilter ) );

		} else {

			_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE );
			_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE );

			_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, filterFallback( texture.magFilter ) );
			_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, filterFallback( texture.minFilter ) );

		}

		if ( _glExtensionTextureFilterAnisotropic && texture.type !== THREE.FloatType ) {

			if ( texture.anisotropy > 1 || texture.__oldAnisotropy ) {

				_gl.texParameterf( textureType, _glExtensionTextureFilterAnisotropic.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, _maxAnisotropy ) );
				texture.__oldAnisotropy = texture.anisotropy;

			}

		}

	};

	this.setTexture = function ( texture, slot ) {

		if ( texture.needsUpdate ) {

			if ( ! texture.__webglInit ) {

				texture.__webglInit = true;
				texture.__webglTexture = _gl.createTexture();

				_this.info.memory.textures ++;

			}

			_gl.activeTexture( _gl.TEXTURE0 + slot );
			_gl.bindTexture( _gl.TEXTURE_2D, texture.__webglTexture );

			_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
			_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );

			var image = texture.image,
			isImagePowerOfTwo = isPowerOfTwo( image.width ) && isPowerOfTwo( image.height ),
			glFormat = paramThreeToGL( texture.format ),
			glType = paramThreeToGL( texture.type );

			setTextureParameters( _gl.TEXTURE_2D, texture, isImagePowerOfTwo );

			if ( texture instanceof THREE.CompressedTexture ) {

				var mipmap, mipmaps = texture.mipmaps;

				for( var i = 0, il = mipmaps.length; i < il; i ++ ) {

					mipmap = mipmaps[ i ];
					_gl.compressedTexImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, mipmap.data );

				}

			} else if ( texture instanceof THREE.DataTexture ) {

				_gl.texImage2D( _gl.TEXTURE_2D, 0, glFormat, image.width, image.height, 0, glFormat, glType, image.data );

			} else {

				_gl.texImage2D( _gl.TEXTURE_2D, 0, glFormat, glFormat, glType, texture.image );

			}

			if ( texture.generateMipmaps && isImagePowerOfTwo ) _gl.generateMipmap( _gl.TEXTURE_2D );

			texture.needsUpdate = false;

			if ( texture.onUpdate ) texture.onUpdate();

		} else {

			_gl.activeTexture( _gl.TEXTURE0 + slot );
			_gl.bindTexture( _gl.TEXTURE_2D, texture.__webglTexture );

		}

	};

	function clampToMaxSize ( image, maxSize ) {

		if ( image.width <= maxSize && image.height <= maxSize ) {

			return image;

		}

		// Warning: Scaling through the canvas will only work with images that use
		// premultiplied alpha.

		var maxDimension = Math.max( image.width, image.height );
		var newWidth = Math.floor( image.width * maxSize / maxDimension );
		var newHeight = Math.floor( image.height * maxSize / maxDimension );

		var canvas = document.createElement( 'canvas' );
		canvas.width = newWidth;
		canvas.height = newHeight;

		var ctx = canvas.getContext( "2d" );
		ctx.drawImage( image, 0, 0, image.width, image.height, 0, 0, newWidth, newHeight );

		return canvas;

	}

	function setCubeTexture ( texture, slot ) {

		if ( texture.image.length === 6 ) {

			if ( texture.needsUpdate ) {

				if ( ! texture.image.__webglTextureCube ) {

					texture.image.__webglTextureCube = _gl.createTexture();

				}

				_gl.activeTexture( _gl.TEXTURE0 + slot );
				_gl.bindTexture( _gl.TEXTURE_CUBE_MAP, texture.image.__webglTextureCube );

				_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );

				var isCompressed = texture instanceof THREE.CompressedTexture;

				var cubeImage = [];

				for ( var i = 0; i < 6; i ++ ) {

					if ( _this.autoScaleCubemaps && ! isCompressed ) {

						cubeImage[ i ] = clampToMaxSize( texture.image[ i ], _maxCubemapSize );

					} else {

						cubeImage[ i ] = texture.image[ i ];

					}

				}

				var image = cubeImage[ 0 ],
				isImagePowerOfTwo = isPowerOfTwo( image.width ) && isPowerOfTwo( image.height ),
				glFormat = paramThreeToGL( texture.format ),
				glType = paramThreeToGL( texture.type );

				setTextureParameters( _gl.TEXTURE_CUBE_MAP, texture, isImagePowerOfTwo );

				for ( var i = 0; i < 6; i ++ ) {

					if ( isCompressed ) {

						var mipmap, mipmaps = cubeImage[ i ].mipmaps;

						for( var j = 0, jl = mipmaps.length; j < jl; j ++ ) {

							mipmap = mipmaps[ j ];
							_gl.compressedTexImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, mipmap.data );

						}

					} else {

						_gl.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, glFormat, glType, cubeImage[ i ] );

					}

				}

				if ( texture.generateMipmaps && isImagePowerOfTwo ) {

					_gl.generateMipmap( _gl.TEXTURE_CUBE_MAP );

				}

				texture.needsUpdate = false;

				if ( texture.onUpdate ) texture.onUpdate();

			} else {

				_gl.activeTexture( _gl.TEXTURE0 + slot );
				_gl.bindTexture( _gl.TEXTURE_CUBE_MAP, texture.image.__webglTextureCube );

			}

		}

	};

	function setCubeTextureDynamic ( texture, slot ) {

		_gl.activeTexture( _gl.TEXTURE0 + slot );
		_gl.bindTexture( _gl.TEXTURE_CUBE_MAP, texture.__webglTexture );

	};

	// Render targets

	function setupFrameBuffer ( framebuffer, renderTarget, textureTarget ) {

		_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
		_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, textureTarget, renderTarget.__webglTexture, 0 );

	};

	function setupRenderBuffer ( renderbuffer, renderTarget  ) {

		_gl.bindRenderbuffer( _gl.RENDERBUFFER, renderbuffer );

		if ( renderTarget.depthBuffer && ! renderTarget.stencilBuffer ) {

			_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.DEPTH_COMPONENT16, renderTarget.width, renderTarget.height );
			_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );

		/* For some reason this is not working. Defaulting to RGBA4.
		} else if( ! renderTarget.depthBuffer && renderTarget.stencilBuffer ) {

			_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.STENCIL_INDEX8, renderTarget.width, renderTarget.height );
			_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );
		*/
		} else if( renderTarget.depthBuffer && renderTarget.stencilBuffer ) {

			_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.DEPTH_STENCIL, renderTarget.width, renderTarget.height );
			_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );

		} else {

			_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.RGBA4, renderTarget.width, renderTarget.height );

		}

	};

	this.setRenderTarget = function ( renderTarget ) {

		var isCube = ( renderTarget instanceof THREE.WebGLRenderTargetCube );

		if ( renderTarget && ! renderTarget.__webglFramebuffer ) {

			if ( renderTarget.depthBuffer === undefined ) renderTarget.depthBuffer = true;
			if ( renderTarget.stencilBuffer === undefined ) renderTarget.stencilBuffer = true;

			renderTarget.__webglTexture = _gl.createTexture();

			// Setup texture, create render and frame buffers

			var isTargetPowerOfTwo = isPowerOfTwo( renderTarget.width ) && isPowerOfTwo( renderTarget.height ),
				glFormat = paramThreeToGL( renderTarget.format ),
				glType = paramThreeToGL( renderTarget.type );

			if ( isCube ) {

				renderTarget.__webglFramebuffer = [];
				renderTarget.__webglRenderbuffer = [];

				_gl.bindTexture( _gl.TEXTURE_CUBE_MAP, renderTarget.__webglTexture );
				setTextureParameters( _gl.TEXTURE_CUBE_MAP, renderTarget, isTargetPowerOfTwo );

				for ( var i = 0; i < 6; i ++ ) {

					renderTarget.__webglFramebuffer[ i ] = _gl.createFramebuffer();
					renderTarget.__webglRenderbuffer[ i ] = _gl.createRenderbuffer();

					_gl.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );

					setupFrameBuffer( renderTarget.__webglFramebuffer[ i ], renderTarget, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i );
					setupRenderBuffer( renderTarget.__webglRenderbuffer[ i ], renderTarget );

				}

				if ( isTargetPowerOfTwo ) _gl.generateMipmap( _gl.TEXTURE_CUBE_MAP );

			} else {

				renderTarget.__webglFramebuffer = _gl.createFramebuffer();
				renderTarget.__webglRenderbuffer = _gl.createRenderbuffer();

				_gl.bindTexture( _gl.TEXTURE_2D, renderTarget.__webglTexture );
				setTextureParameters( _gl.TEXTURE_2D, renderTarget, isTargetPowerOfTwo );

				_gl.texImage2D( _gl.TEXTURE_2D, 0, glFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );

				setupFrameBuffer( renderTarget.__webglFramebuffer, renderTarget, _gl.TEXTURE_2D );
				setupRenderBuffer( renderTarget.__webglRenderbuffer, renderTarget );

				if ( isTargetPowerOfTwo ) _gl.generateMipmap( _gl.TEXTURE_2D );

			}

			// Release everything

			if ( isCube ) {

				_gl.bindTexture( _gl.TEXTURE_CUBE_MAP, null );

			} else {

				_gl.bindTexture( _gl.TEXTURE_2D, null );

			}

			_gl.bindRenderbuffer( _gl.RENDERBUFFER, null );
			_gl.bindFramebuffer( _gl.FRAMEBUFFER, null);

		}

		var framebuffer, width, height, vx, vy;

		if ( renderTarget ) {

			if ( isCube ) {

				framebuffer = renderTarget.__webglFramebuffer[ renderTarget.activeCubeFace ];

			} else {

				framebuffer = renderTarget.__webglFramebuffer;

			}

			width = renderTarget.width;
			height = renderTarget.height;

			vx = 0;
			vy = 0;

		} else {

			framebuffer = null;

			width = _viewportWidth;
			height = _viewportHeight;

			vx = _viewportX;
			vy = _viewportY;

		}

		if ( framebuffer !== _currentFramebuffer ) {

			_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
			_gl.viewport( vx, vy, width, height );

			_currentFramebuffer = framebuffer;

		}

		_currentWidth = width;
		_currentHeight = height;

	};

	function updateRenderTargetMipmap ( renderTarget ) {

		if ( renderTarget instanceof THREE.WebGLRenderTargetCube ) {

			_gl.bindTexture( _gl.TEXTURE_CUBE_MAP, renderTarget.__webglTexture );
			_gl.generateMipmap( _gl.TEXTURE_CUBE_MAP );
			_gl.bindTexture( _gl.TEXTURE_CUBE_MAP, null );

		} else {

			_gl.bindTexture( _gl.TEXTURE_2D, renderTarget.__webglTexture );
			_gl.generateMipmap( _gl.TEXTURE_2D );
			_gl.bindTexture( _gl.TEXTURE_2D, null );

		}

	};

	// Fallback filters for non-power-of-2 textures

	function filterFallback ( f ) {

		if ( f === THREE.NearestFilter || f === THREE.NearestMipMapNearestFilter || f === THREE.NearestMipMapLinearFilter ) {

			return _gl.NEAREST;

		}

		return _gl.LINEAR;

	};

	// Map three.js constants to WebGL constants

	function paramThreeToGL ( p ) {

		if ( p === THREE.RepeatWrapping ) return _gl.REPEAT;
		if ( p === THREE.ClampToEdgeWrapping ) return _gl.CLAMP_TO_EDGE;
		if ( p === THREE.MirroredRepeatWrapping ) return _gl.MIRRORED_REPEAT;

		if ( p === THREE.NearestFilter ) return _gl.NEAREST;
		if ( p === THREE.NearestMipMapNearestFilter ) return _gl.NEAREST_MIPMAP_NEAREST;
		if ( p === THREE.NearestMipMapLinearFilter ) return _gl.NEAREST_MIPMAP_LINEAR;

		if ( p === THREE.LinearFilter ) return _gl.LINEAR;
		if ( p === THREE.LinearMipMapNearestFilter ) return _gl.LINEAR_MIPMAP_NEAREST;
		if ( p === THREE.LinearMipMapLinearFilter ) return _gl.LINEAR_MIPMAP_LINEAR;

		if ( p === THREE.UnsignedByteType ) return _gl.UNSIGNED_BYTE;
		if ( p === THREE.UnsignedShort4444Type ) return _gl.UNSIGNED_SHORT_4_4_4_4;
		if ( p === THREE.UnsignedShort5551Type ) return _gl.UNSIGNED_SHORT_5_5_5_1;
		if ( p === THREE.UnsignedShort565Type ) return _gl.UNSIGNED_SHORT_5_6_5;

		if ( p === THREE.ByteType ) return _gl.BYTE;
		if ( p === THREE.ShortType ) return _gl.SHORT;
		if ( p === THREE.UnsignedShortType ) return _gl.UNSIGNED_SHORT;
		if ( p === THREE.IntType ) return _gl.INT;
		if ( p === THREE.UnsignedIntType ) return _gl.UNSIGNED_INT;
		if ( p === THREE.FloatType ) return _gl.FLOAT;

		if ( p === THREE.AlphaFormat ) return _gl.ALPHA;
		if ( p === THREE.RGBFormat ) return _gl.RGB;
		if ( p === THREE.RGBAFormat ) return _gl.RGBA;
		if ( p === THREE.LuminanceFormat ) return _gl.LUMINANCE;
		if ( p === THREE.LuminanceAlphaFormat ) return _gl.LUMINANCE_ALPHA;

		if ( p === THREE.AddEquation ) return _gl.FUNC_ADD;
		if ( p === THREE.SubtractEquation ) return _gl.FUNC_SUBTRACT;
		if ( p === THREE.ReverseSubtractEquation ) return _gl.FUNC_REVERSE_SUBTRACT;

		if ( p === THREE.ZeroFactor ) return _gl.ZERO;
		if ( p === THREE.OneFactor ) return _gl.ONE;
		if ( p === THREE.SrcColorFactor ) return _gl.SRC_COLOR;
		if ( p === THREE.OneMinusSrcColorFactor ) return _gl.ONE_MINUS_SRC_COLOR;
		if ( p === THREE.SrcAlphaFactor ) return _gl.SRC_ALPHA;
		if ( p === THREE.OneMinusSrcAlphaFactor ) return _gl.ONE_MINUS_SRC_ALPHA;
		if ( p === THREE.DstAlphaFactor ) return _gl.DST_ALPHA;
		if ( p === THREE.OneMinusDstAlphaFactor ) return _gl.ONE_MINUS_DST_ALPHA;

		if ( p === THREE.DstColorFactor ) return _gl.DST_COLOR;
		if ( p === THREE.OneMinusDstColorFactor ) return _gl.ONE_MINUS_DST_COLOR;
		if ( p === THREE.SrcAlphaSaturateFactor ) return _gl.SRC_ALPHA_SATURATE;

		if ( _glExtensionCompressedTextureS3TC !== undefined ) {

			if ( p === THREE.RGB_S3TC_DXT1_Format ) return _glExtensionCompressedTextureS3TC.COMPRESSED_RGB_S3TC_DXT1_EXT;
			if ( p === THREE.RGBA_S3TC_DXT1_Format ) return _glExtensionCompressedTextureS3TC.COMPRESSED_RGBA_S3TC_DXT1_EXT;
			if ( p === THREE.RGBA_S3TC_DXT3_Format ) return _glExtensionCompressedTextureS3TC.COMPRESSED_RGBA_S3TC_DXT3_EXT;
			if ( p === THREE.RGBA_S3TC_DXT5_Format ) return _glExtensionCompressedTextureS3TC.COMPRESSED_RGBA_S3TC_DXT5_EXT;

		}

		return 0;

	};

	// Allocations

	function allocateBones ( object ) {

		if ( _supportsBoneTextures && object && object.useVertexTexture ) {

			return 1024;

		} else {

			// default for when object is not specified
			// ( for example when prebuilding shader
			//   to be used with multiple objects )
			//
			// 	- leave some extra space for other uniforms
			//  - limit here is ANGLE's 254 max uniform vectors
			//    (up to 54 should be safe)

			var nVertexUniforms = _gl.getParameter( _gl.MAX_VERTEX_UNIFORM_VECTORS );
			var nVertexMatrices = Math.floor( ( nVertexUniforms - 20 ) / 4 );

			var maxBones = nVertexMatrices;

			if ( object !== undefined && object instanceof THREE.SkinnedMesh ) {

				maxBones = Math.min( object.bones.length, maxBones );

				if ( maxBones < object.bones.length ) {

					console.warn( "WebGLRenderer: too many bones - " + object.bones.length + ", this GPU supports just " + maxBones + " (try OpenGL instead of ANGLE)" );

				}

			}

			return maxBones;

		}

	};

	function allocateLights ( lights ) {

		var l, ll, light, dirLights, pointLights, spotLights, hemiLights;

		dirLights = pointLights = spotLights = hemiLights = 0;

		for ( l = 0, ll = lights.length; l < ll; l ++ ) {

			light = lights[ l ];

			if ( light.onlyShadow ) continue;

			if ( light instanceof THREE.DirectionalLight ) dirLights ++;
			if ( light instanceof THREE.PointLight ) pointLights ++;
			if ( light instanceof THREE.SpotLight ) spotLights ++;
			if ( light instanceof THREE.HemisphereLight ) hemiLights ++;

		}

		return { 'directional' : dirLights, 'point' : pointLights, 'spot': spotLights, 'hemi': hemiLights };

	};

	function allocateShadows ( lights ) {

		var l, ll, light, maxShadows = 0;

		for ( l = 0, ll = lights.length; l < ll; l++ ) {

			light = lights[ l ];

			if ( ! light.castShadow ) continue;

			if ( light instanceof THREE.SpotLight ) maxShadows ++;
			if ( light instanceof THREE.DirectionalLight && ! light.shadowCascade ) maxShadows ++;

		}

		return maxShadows;

	};

	// Initialization

	function initGL () {

		try {

			if ( ! ( _gl = _canvas.getContext( 'experimental-webgl', { alpha: _alpha, premultipliedAlpha: _premultipliedAlpha, antialias: _antialias, stencil: _stencil, preserveDrawingBuffer: _preserveDrawingBuffer } ) ) ) {

				throw 'Error creating WebGL context.';

			}

		} catch ( error ) {

			console.error( error );

		}

		_glExtensionTextureFloat = _gl.getExtension( 'OES_texture_float' );
		_glExtensionStandardDerivatives = _gl.getExtension( 'OES_standard_derivatives' );

		_glExtensionTextureFilterAnisotropic = _gl.getExtension( 'EXT_texture_filter_anisotropic' ) ||
											   _gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) ||
											   _gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );


		_glExtensionCompressedTextureS3TC = _gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) ||
											_gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) ||
											_gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );

		if ( ! _glExtensionTextureFloat ) {

			console.log( 'THREE.WebGLRenderer: Float textures not supported.' );

		}

		if ( ! _glExtensionStandardDerivatives ) {

			console.log( 'THREE.WebGLRenderer: Standard derivatives not supported.' );

		}

		if ( ! _glExtensionTextureFilterAnisotropic ) {

			console.log( 'THREE.WebGLRenderer: Anisotropic texture filtering not supported.' );

		}

		if ( ! _glExtensionCompressedTextureS3TC ) {

			console.log( 'THREE.WebGLRenderer: S3TC compressed textures not supported.' );

		}

	};

	function setDefaultGLState () {

		_gl.clearColor( 0, 0, 0, 1 );
		_gl.clearDepth( 1 );
		_gl.clearStencil( 0 );

		_gl.enable( _gl.DEPTH_TEST );
		_gl.depthFunc( _gl.LEQUAL );

		_gl.frontFace( _gl.CCW );
		_gl.cullFace( _gl.BACK );
		_gl.enable( _gl.CULL_FACE );

		_gl.enable( _gl.BLEND );
		_gl.blendEquation( _gl.FUNC_ADD );
		_gl.blendFunc( _gl.SRC_ALPHA, _gl.ONE_MINUS_SRC_ALPHA );

		_gl.clearColor( _clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha );

	};

	// default plugins (order is important)

	this.shadowMapPlugin = new THREE.ShadowMapPlugin();
	this.addPrePlugin( this.shadowMapPlugin );

	this.addPostPlugin( new THREE.SpritePlugin() );
	this.addPostPlugin( new THREE.LensFlarePlugin() );

};
/**
 * @author szimek / https://github.com/szimek/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.WebGLRenderTarget = function ( width, height, options ) {

	this.width = width;
	this.height = height;

	options = options || {};

	this.wrapS = options.wrapS !== undefined ? options.wrapS : THREE.ClampToEdgeWrapping;
	this.wrapT = options.wrapT !== undefined ? options.wrapT : THREE.ClampToEdgeWrapping;

	this.magFilter = options.magFilter !== undefined ? options.magFilter : THREE.LinearFilter;
	this.minFilter = options.minFilter !== undefined ? options.minFilter : THREE.LinearMipMapLinearFilter;

	this.anisotropy = options.anisotropy !== undefined ? options.anisotropy : 1;

	this.offset = new THREE.Vector2( 0, 0 );
	this.repeat = new THREE.Vector2( 1, 1 );

	this.format = options.format !== undefined ? options.format : THREE.RGBAFormat;
	this.type = options.type !== undefined ? options.type : THREE.UnsignedByteType;

	this.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;
	this.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : true;

	this.generateMipmaps = true;

};

THREE.WebGLRenderTarget.prototype.clone = function() {

	var tmp = new THREE.WebGLRenderTarget( this.width, this.height );

	tmp.wrapS = this.wrapS;
	tmp.wrapT = this.wrapT;

	tmp.magFilter = this.magFilter;
	tmp.anisotropy = this.anisotropy;

	tmp.minFilter = this.minFilter;

	tmp.offset.copy( this.offset );
	tmp.repeat.copy( this.repeat );

	tmp.format = this.format;
	tmp.type = this.type;

	tmp.depthBuffer = this.depthBuffer;
	tmp.stencilBuffer = this.stencilBuffer;

	tmp.generateMipmaps = this.generateMipmaps;

	return tmp;

};
/**
 * @author alteredq / http://alteredqualia.com
 */

THREE.WebGLRenderTargetCube = function ( width, height, options ) {

	THREE.WebGLRenderTarget.call( this, width, height, options );

	this.activeCubeFace = 0; // PX 0, NX 1, PY 2, NY 3, PZ 4, NZ 5

};

THREE.WebGLRenderTargetCube.prototype = Object.create( THREE.WebGLRenderTarget.prototype );
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.RenderableVertex = function () {

	this.positionWorld = new THREE.Vector3();
	this.positionScreen = new THREE.Vector4();

	this.visible = true;

};

THREE.RenderableVertex.prototype.copy = function ( vertex ) {

	this.positionWorld.copy( vertex.positionWorld );
	this.positionScreen.copy( vertex.positionScreen );

}
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.RenderableFace3 = function () {

	this.v1 = new THREE.RenderableVertex();
	this.v2 = new THREE.RenderableVertex();
	this.v3 = new THREE.RenderableVertex();

	this.centroidWorld = new THREE.Vector3();
	this.centroidScreen = new THREE.Vector3();

	this.normalWorld = new THREE.Vector3();
	this.vertexNormalsWorld = [ new THREE.Vector3(), new THREE.Vector3(), new THREE.Vector3() ];
	this.vertexNormalsLength = 0;

	this.color = null;
	this.material = null;
	this.uvs = [[]];

	this.z = null;

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.RenderableFace4 = function () {

	this.v1 = new THREE.RenderableVertex();
	this.v2 = new THREE.RenderableVertex();
	this.v3 = new THREE.RenderableVertex();
	this.v4 = new THREE.RenderableVertex();

	this.centroidWorld = new THREE.Vector3();
	this.centroidScreen = new THREE.Vector3();

	this.normalWorld = new THREE.Vector3();
	this.vertexNormalsWorld = [ new THREE.Vector3(), new THREE.Vector3(), new THREE.Vector3(), new THREE.Vector3() ];
	this.vertexNormalsLength = 0;

	this.color = null;
	this.material = null;
	this.uvs = [[]];

	this.z = null;

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.RenderableObject = function () {

	this.object = null;
	this.z = null;

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.RenderableParticle = function () {

	this.object = null;

	this.x = null;
	this.y = null;
	this.z = null;

	this.rotation = null;
	this.scale = new THREE.Vector2();

	this.material = null;

};
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.RenderableLine = function () {

	this.z = null;

	this.v1 = new THREE.RenderableVertex();
	this.v2 = new THREE.RenderableVertex();

	this.material = null;

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.ColorUtils = {

	adjustHSV : function ( color, h, s, v ) {

		var hsv = THREE.ColorUtils.__hsv;

		color.getHSV( hsv );

		hsv.h = THREE.Math.clamp( hsv.h + h, 0, 1 );
		hsv.s = THREE.Math.clamp( hsv.s + s, 0, 1 );
		hsv.v = THREE.Math.clamp( hsv.v + v, 0, 1 );

		color.setHSV( hsv.h, hsv.s, hsv.v );

	}

};

THREE.ColorUtils.__hsv = { h: 0, s: 0, v: 0 };/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.GeometryUtils = {

	// Merge two geometries or geometry and geometry from object (using object's transform)

	merge: function ( geometry1, object2 /* mesh | geometry */ ) {

		var matrix, matrixRotation,
		vertexOffset = geometry1.vertices.length,
		uvPosition = geometry1.faceVertexUvs[ 0 ].length,
		geometry2 = object2 instanceof THREE.Mesh ? object2.geometry : object2,
		vertices1 = geometry1.vertices,
		vertices2 = geometry2.vertices,
		faces1 = geometry1.faces,
		faces2 = geometry2.faces,
		uvs1 = geometry1.faceVertexUvs[ 0 ],
		uvs2 = geometry2.faceVertexUvs[ 0 ];

		if ( object2 instanceof THREE.Mesh ) {

			object2.matrixAutoUpdate && object2.updateMatrix();

			matrix = object2.matrix;
			matrixRotation = new THREE.Matrix4();
			matrixRotation.extractRotation( matrix, object2.scale );

		}

		// vertices

		for ( var i = 0, il = vertices2.length; i < il; i ++ ) {

			var vertex = vertices2[ i ];

			var vertexCopy = vertex.clone();

			if ( matrix ) matrix.multiplyVector3( vertexCopy );

			vertices1.push( vertexCopy );

		}

		// faces

		for ( i = 0, il = faces2.length; i < il; i ++ ) {

			var face = faces2[ i ], faceCopy, normal, color,
			faceVertexNormals = face.vertexNormals,
			faceVertexColors = face.vertexColors;

			if ( face instanceof THREE.Face3 ) {

				faceCopy = new THREE.Face3( face.a + vertexOffset, face.b + vertexOffset, face.c + vertexOffset );

			} else if ( face instanceof THREE.Face4 ) {

				faceCopy = new THREE.Face4( face.a + vertexOffset, face.b + vertexOffset, face.c + vertexOffset, face.d + vertexOffset );

			}

			faceCopy.normal.copy( face.normal );

			if ( matrixRotation ) matrixRotation.multiplyVector3( faceCopy.normal );

			for ( var j = 0, jl = faceVertexNormals.length; j < jl; j ++ ) {

				normal = faceVertexNormals[ j ].clone();

				if ( matrixRotation ) matrixRotation.multiplyVector3( normal );

				faceCopy.vertexNormals.push( normal );

			}

			faceCopy.color.copy( face.color );

			for ( var j = 0, jl = faceVertexColors.length; j < jl; j ++ ) {

				color = faceVertexColors[ j ];
				faceCopy.vertexColors.push( color.clone() );

			}

			faceCopy.materialIndex = face.materialIndex;

			faceCopy.centroid.copy( face.centroid );
			if ( matrix ) matrix.multiplyVector3( faceCopy.centroid );

			faces1.push( faceCopy );

		}

		// uvs

		for ( i = 0, il = uvs2.length; i < il; i ++ ) {

			var uv = uvs2[ i ], uvCopy = [];

			for ( var j = 0, jl = uv.length; j < jl; j ++ ) {

				uvCopy.push( new THREE.UV( uv[ j ].u, uv[ j ].v ) );

			}

			uvs1.push( uvCopy );

		}

	},

	removeMaterials: function ( geometry, materialIndexArray ) {

		var materialIndexMap = {};

		for ( var i = 0, il = materialIndexArray.length; i < il; i ++ ) {

			materialIndexMap[ materialIndexArray[i] ] = true;

		}

		var face, newFaces = [];

		for ( var i = 0, il = geometry.faces.length; i < il; i ++ ) {

			face = geometry.faces[ i ];
			if ( ! ( face.materialIndex in materialIndexMap ) ) newFaces.push( face );

		}

		geometry.faces = newFaces;

	},

	// Get random point in triangle (via barycentric coordinates)
	// 	(uniform distribution)
	// 	http://www.cgafaq.info/wiki/Random_Point_In_Triangle

	randomPointInTriangle: function ( vectorA, vectorB, vectorC ) {

		var a, b, c,
			point = new THREE.Vector3(),
			tmp = THREE.GeometryUtils.__v1;

		a = THREE.GeometryUtils.random();
		b = THREE.GeometryUtils.random();

		if ( ( a + b ) > 1 ) {

			a = 1 - a;
			b = 1 - b;

		}

		c = 1 - a - b;

		point.copy( vectorA );
		point.multiplyScalar( a );

		tmp.copy( vectorB );
		tmp.multiplyScalar( b );

		point.addSelf( tmp );

		tmp.copy( vectorC );
		tmp.multiplyScalar( c );

		point.addSelf( tmp );

		return point;

	},

	// Get random point in face (triangle / quad)
	// (uniform distribution)

	randomPointInFace: function ( face, geometry, useCachedAreas ) {

		var vA, vB, vC, vD;

		if ( face instanceof THREE.Face3 ) {

			vA = geometry.vertices[ face.a ];
			vB = geometry.vertices[ face.b ];
			vC = geometry.vertices[ face.c ];

			return THREE.GeometryUtils.randomPointInTriangle( vA, vB, vC );

		} else if ( face instanceof THREE.Face4 ) {

			vA = geometry.vertices[ face.a ];
			vB = geometry.vertices[ face.b ];
			vC = geometry.vertices[ face.c ];
			vD = geometry.vertices[ face.d ];

			var area1, area2;

			if ( useCachedAreas ) {

				if ( face._area1 && face._area2 ) {

					area1 = face._area1;
					area2 = face._area2;

				} else {

					area1 = THREE.GeometryUtils.triangleArea( vA, vB, vD );
					area2 = THREE.GeometryUtils.triangleArea( vB, vC, vD );

					face._area1 = area1;
					face._area2 = area2;

				}

			} else {

				area1 = THREE.GeometryUtils.triangleArea( vA, vB, vD ),
				area2 = THREE.GeometryUtils.triangleArea( vB, vC, vD );

			}

			var r = THREE.GeometryUtils.random() * ( area1 + area2 );

			if ( r < area1 ) {

				return THREE.GeometryUtils.randomPointInTriangle( vA, vB, vD );

			} else {

				return THREE.GeometryUtils.randomPointInTriangle( vB, vC, vD );

			}

		}

	},

	// Get uniformly distributed random points in mesh
	// 	- create array with cumulative sums of face areas
	//  - pick random number from 0 to total area
	//  - find corresponding place in area array by binary search
	//	- get random point in face

	randomPointsInGeometry: function ( geometry, n ) {

		var face, i,
			faces = geometry.faces,
			vertices = geometry.vertices,
			il = faces.length,
			totalArea = 0,
			cumulativeAreas = [],
			vA, vB, vC, vD;

		// precompute face areas

		for ( i = 0; i < il; i ++ ) {

			face = faces[ i ];

			if ( face instanceof THREE.Face3 ) {

				vA = vertices[ face.a ];
				vB = vertices[ face.b ];
				vC = vertices[ face.c ];

				face._area = THREE.GeometryUtils.triangleArea( vA, vB, vC );

			} else if ( face instanceof THREE.Face4 ) {

				vA = vertices[ face.a ];
				vB = vertices[ face.b ];
				vC = vertices[ face.c ];
				vD = vertices[ face.d ];

				face._area1 = THREE.GeometryUtils.triangleArea( vA, vB, vD );
				face._area2 = THREE.GeometryUtils.triangleArea( vB, vC, vD );

				face._area = face._area1 + face._area2;

			}

			totalArea += face._area;

			cumulativeAreas[ i ] = totalArea;

		}

		// binary search cumulative areas array

		function binarySearchIndices( value ) {

			function binarySearch( start, end ) {

				// return closest larger index
				// if exact number is not found

				if ( end < start )
					return start;

				var mid = start + Math.floor( ( end - start ) / 2 );

				if ( cumulativeAreas[ mid ] > value ) {

					return binarySearch( start, mid - 1 );

				} else if ( cumulativeAreas[ mid ] < value ) {

					return binarySearch( mid + 1, end );

				} else {

					return mid;

				}

			}

			var result = binarySearch( 0, cumulativeAreas.length - 1 )
			return result;

		}

		// pick random face weighted by face area

		var r, index,
			result = [];

		var stats = {};

		for ( i = 0; i < n; i ++ ) {

			r = THREE.GeometryUtils.random() * totalArea;

			index = binarySearchIndices( r );

			result[ i ] = THREE.GeometryUtils.randomPointInFace( faces[ index ], geometry, true );

			if ( ! stats[ index ] ) {

				stats[ index ] = 1;

			} else {

				stats[ index ] += 1;

			}

		}

		return result;

	},

	// Get triangle area (by Heron's formula)
	// 	http://en.wikipedia.org/wiki/Heron%27s_formula

	triangleArea: function ( vectorA, vectorB, vectorC ) {

		var s, a, b, c,
			tmp = THREE.GeometryUtils.__v1;

		tmp.sub( vectorA, vectorB );
		a = tmp.length();

		tmp.sub( vectorA, vectorC );
		b = tmp.length();

		tmp.sub( vectorB, vectorC );
		c = tmp.length();

		s = 0.5 * ( a + b + c );

		return Math.sqrt( s * ( s - a ) * ( s - b ) * ( s - c ) );

	},

	// Center geometry so that 0,0,0 is in center of bounding box

	center: function ( geometry ) {

		geometry.computeBoundingBox();

		var bb = geometry.boundingBox;

		var offset = new THREE.Vector3();

		offset.add( bb.min, bb.max );
		offset.multiplyScalar( -0.5 );

		geometry.applyMatrix( new THREE.Matrix4().makeTranslation( offset.x, offset.y, offset.z ) );
		geometry.computeBoundingBox();

		return offset;

	},

	// Normalize UVs to be from <0,1>
	// (for now just the first set of UVs)

	normalizeUVs: function ( geometry ) {

		var uvSet = geometry.faceVertexUvs[ 0 ];

		for ( var i = 0, il = uvSet.length; i < il; i ++ ) {

			var uvs = uvSet[ i ];

			for ( var j = 0, jl = uvs.length; j < jl; j ++ ) {

				// texture repeat

				if( uvs[ j ].u !== 1.0 ) uvs[ j ].u = uvs[ j ].u - Math.floor( uvs[ j ].u );
				if( uvs[ j ].v !== 1.0 ) uvs[ j ].v = uvs[ j ].v - Math.floor( uvs[ j ].v );

			}

		}

	},

	triangulateQuads: function ( geometry ) {

		var i, il, j, jl;

		var faces = [];
		var faceUvs = [];
		var faceVertexUvs = [];

		for ( i = 0, il = geometry.faceUvs.length; i < il; i ++ ) {

			faceUvs[ i ] = [];

		}

		for ( i = 0, il = geometry.faceVertexUvs.length; i < il; i ++ ) {

			faceVertexUvs[ i ] = [];

		}

		for ( i = 0, il = geometry.faces.length; i < il; i ++ ) {

			var face = geometry.faces[ i ];

			if ( face instanceof THREE.Face4 ) {

				var a = face.a;
				var b = face.b;
				var c = face.c;
				var d = face.d;

				var triA = new THREE.Face3();
				var triB = new THREE.Face3();

				triA.color.copy( face.color );
				triB.color.copy( face.color );

				triA.materialIndex = face.materialIndex;
				triB.materialIndex = face.materialIndex;

				triA.a = a;
				triA.b = b;
				triA.c = d;

				triB.a = b;
				triB.b = c;
				triB.c = d;

				if ( face.vertexColors.length === 4 ) {

					triA.vertexColors[ 0 ] = face.vertexColors[ 0 ].clone();
					triA.vertexColors[ 1 ] = face.vertexColors[ 1 ].clone();
					triA.vertexColors[ 2 ] = face.vertexColors[ 3 ].clone();

					triB.vertexColors[ 0 ] = face.vertexColors[ 1 ].clone();
					triB.vertexColors[ 1 ] = face.vertexColors[ 2 ].clone();
					triB.vertexColors[ 2 ] = face.vertexColors[ 3 ].clone();

				}

				faces.push( triA, triB );

				for ( j = 0, jl = geometry.faceVertexUvs.length; j < jl; j ++ ) {

					if ( geometry.faceVertexUvs[ j ].length ) {

						var uvs = geometry.faceVertexUvs[ j ][ i ];

						var uvA = uvs[ 0 ];
						var uvB = uvs[ 1 ];
						var uvC = uvs[ 2 ];
						var uvD = uvs[ 3 ];

						var uvsTriA = [ uvA.clone(), uvB.clone(), uvD.clone() ];
						var uvsTriB = [ uvB.clone(), uvC.clone(), uvD.clone() ];

						faceVertexUvs[ j ].push( uvsTriA, uvsTriB );

					}

				}

				for ( j = 0, jl = geometry.faceUvs.length; j < jl; j ++ ) {

					if ( geometry.faceUvs[ j ].length ) {

						var faceUv = geometry.faceUvs[ j ][ i ];

						faceUvs[ j ].push( faceUv, faceUv );

					}

				}

			} else {

				faces.push( face );

				for ( j = 0, jl = geometry.faceUvs.length; j < jl; j ++ ) {

					faceUvs[ j ].push( geometry.faceUvs[ j ][ i ] );

				}

				for ( j = 0, jl = geometry.faceVertexUvs.length; j < jl; j ++ ) {

					faceVertexUvs[ j ].push( geometry.faceVertexUvs[ j ][ i ] );

				}

			}

		}

		geometry.faces = faces;
		geometry.faceUvs = faceUvs;
		geometry.faceVertexUvs = faceVertexUvs;

		geometry.computeCentroids();
		geometry.computeFaceNormals();
		geometry.computeVertexNormals();

		if ( geometry.hasTangents ) geometry.computeTangents();

	},

	// Make all faces use unique vertices
	// so that each face can be separated from others

	explode: function( geometry ) {

		var vertices = [];

		for ( var i = 0, il = geometry.faces.length; i < il; i ++ ) {

			var n = vertices.length;

			var face = geometry.faces[ i ];

			if ( face instanceof THREE.Face4 ) {

				var a = face.a;
				var b = face.b;
				var c = face.c;
				var d = face.d;

				var va = geometry.vertices[ a ];
				var vb = geometry.vertices[ b ];
				var vc = geometry.vertices[ c ];
				var vd = geometry.vertices[ d ];

				vertices.push( va.clone() );
				vertices.push( vb.clone() );
				vertices.push( vc.clone() );
				vertices.push( vd.clone() );

				face.a = n;
				face.b = n + 1;
				face.c = n + 2;
				face.d = n + 3;

			} else {

				var a = face.a;
				var b = face.b;
				var c = face.c;

				var va = geometry.vertices[ a ];
				var vb = geometry.vertices[ b ];
				var vc = geometry.vertices[ c ];

				vertices.push( va.clone() );
				vertices.push( vb.clone() );
				vertices.push( vc.clone() );

				face.a = n;
				face.b = n + 1;
				face.c = n + 2;

			}

		}

		geometry.vertices = vertices;
		delete geometry.__tmpVertices;

	},

	// Break faces with edges longer than maxEdgeLength
	// - not recursive

	tessellate: function ( geometry, maxEdgeLength ) {

		var i, il, face,
		a, b, c, d,
		va, vb, vc, vd,
		dab, dbc, dac, dcd, dad,
		m, m1, m2,
		vm, vm1, vm2,
		vnm, vnm1, vnm2,
		vcm, vcm1, vcm2,
		triA, triB,
		quadA, quadB,
		edge;

		var faces = [];
		var faceVertexUvs = [];

		for ( i = 0, il = geometry.faceVertexUvs.length; i < il; i ++ ) {

			faceVertexUvs[ i ] = [];

		}

		for ( i = 0, il = geometry.faces.length; i < il; i ++ ) {

			face = geometry.faces[ i ];

			if ( face instanceof THREE.Face3 ) {

				a = face.a;
				b = face.b;
				c = face.c;

				va = geometry.vertices[ a ];
				vb = geometry.vertices[ b ];
				vc = geometry.vertices[ c ];

				dab = va.distanceTo( vb );
				dbc = vb.distanceTo( vc );
				dac = va.distanceTo( vc );

				if ( dab > maxEdgeLength || dbc > maxEdgeLength || dac > maxEdgeLength ) {

					m = geometry.vertices.length;

					triA = face.clone();
					triB = face.clone();

					if ( dab >= dbc && dab >= dac ) {

						vm = va.clone();
						vm.lerpSelf( vb, 0.5 );

						triA.a = a;
						triA.b = m;
						triA.c = c;

						triB.a = m;
						triB.b = b;
						triB.c = c;

						if ( face.vertexNormals.length === 3 ) {

							vnm = face.vertexNormals[ 0 ].clone();
							vnm.lerpSelf( face.vertexNormals[ 1 ], 0.5 );

							triA.vertexNormals[ 1 ].copy( vnm );
							triB.vertexNormals[ 0 ].copy( vnm );

						}

						if ( face.vertexColors.length === 3 ) {

							vcm = face.vertexColors[ 0 ].clone();
							vcm.lerpSelf( face.vertexColors[ 1 ], 0.5 );

							triA.vertexColors[ 1 ].copy( vcm );
							triB.vertexColors[ 0 ].copy( vcm );

						}

						edge = 0;

					} else if ( dbc >= dab && dbc >= dac ) {

						vm = vb.clone();
						vm.lerpSelf( vc, 0.5 );

						triA.a = a;
						triA.b = b;
						triA.c = m;

						triB.a = m;
						triB.b = c;
						triB.c = a;

						if ( face.vertexNormals.length === 3 ) {

							vnm = face.vertexNormals[ 1 ].clone();
							vnm.lerpSelf( face.vertexNormals[ 2 ], 0.5 );

							triA.vertexNormals[ 2 ].copy( vnm );

							triB.vertexNormals[ 0 ].copy( vnm );
							triB.vertexNormals[ 1 ].copy( face.vertexNormals[ 2 ] );
							triB.vertexNormals[ 2 ].copy( face.vertexNormals[ 0 ] );

						}

						if ( face.vertexColors.length === 3 ) {

							vcm = face.vertexColors[ 1 ].clone();
							vcm.lerpSelf( face.vertexColors[ 2 ], 0.5 );

							triA.vertexColors[ 2 ].copy( vcm );

							triB.vertexColors[ 0 ].copy( vcm );
							triB.vertexColors[ 1 ].copy( face.vertexColors[ 2 ] );
							triB.vertexColors[ 2 ].copy( face.vertexColors[ 0 ] );

						}

						edge = 1;

					} else {

						vm = va.clone();
						vm.lerpSelf( vc, 0.5 );

						triA.a = a;
						triA.b = b;
						triA.c = m;

						triB.a = m;
						triB.b = b;
						triB.c = c;

						if ( face.vertexNormals.length === 3 ) {

							vnm = face.vertexNormals[ 0 ].clone();
							vnm.lerpSelf( face.vertexNormals[ 2 ], 0.5 );

							triA.vertexNormals[ 2 ].copy( vnm );
							triB.vertexNormals[ 0 ].copy( vnm );

						}

						if ( face.vertexColors.length === 3 ) {

							vcm = face.vertexColors[ 0 ].clone();
							vcm.lerpSelf( face.vertexColors[ 2 ], 0.5 );

							triA.vertexColors[ 2 ].copy( vcm );
							triB.vertexColors[ 0 ].copy( vcm );

						}

						edge = 2;

					}

					faces.push( triA, triB );
					geometry.vertices.push( vm );

					var j, jl, uvs, uvA, uvB, uvC, uvM, uvsTriA, uvsTriB;

					for ( j = 0, jl = geometry.faceVertexUvs.length; j < jl; j ++ ) {

						if ( geometry.faceVertexUvs[ j ].length ) {

							uvs = geometry.faceVertexUvs[ j ][ i ];

							uvA = uvs[ 0 ];
							uvB = uvs[ 1 ];
							uvC = uvs[ 2 ];

							// AB

							if ( edge === 0 ) {

								uvM = uvA.clone();
								uvM.lerpSelf( uvB, 0.5 );

								uvsTriA = [ uvA.clone(), uvM.clone(), uvC.clone() ];
								uvsTriB = [ uvM.clone(), uvB.clone(), uvC.clone() ];

							// BC

							} else if ( edge === 1 ) {

								uvM = uvB.clone();
								uvM.lerpSelf( uvC, 0.5 );

								uvsTriA = [ uvA.clone(), uvB.clone(), uvM.clone() ];
								uvsTriB = [ uvM.clone(), uvC.clone(), uvA.clone() ];

							// AC

							} else {

								uvM = uvA.clone();
								uvM.lerpSelf( uvC, 0.5 );

								uvsTriA = [ uvA.clone(), uvB.clone(), uvM.clone() ];
								uvsTriB = [ uvM.clone(), uvB.clone(), uvC.clone() ];

							}

							faceVertexUvs[ j ].push( uvsTriA, uvsTriB );

						}

					}

				} else {

					faces.push( face );

					for ( j = 0, jl = geometry.faceVertexUvs.length; j < jl; j ++ ) {

						faceVertexUvs[ j ].push( geometry.faceVertexUvs[ j ][ i ] );

					}

				}

			} else {

				a = face.a;
				b = face.b;
				c = face.c;
				d = face.d;

				va = geometry.vertices[ a ];
				vb = geometry.vertices[ b ];
				vc = geometry.vertices[ c ];
				vd = geometry.vertices[ d ];

				dab = va.distanceTo( vb );
				dbc = vb.distanceTo( vc );
				dcd = vc.distanceTo( vd );
				dad = va.distanceTo( vd );

				if ( dab > maxEdgeLength || dbc > maxEdgeLength || dcd > maxEdgeLength || dad > maxEdgeLength ) {

					m1 = geometry.vertices.length;
					m2 = geometry.vertices.length + 1;

					quadA = face.clone();
					quadB = face.clone();

					if ( ( dab >= dbc && dab >= dcd && dab >= dad ) || ( dcd >= dbc && dcd >= dab && dcd >= dad ) ) {

						vm1 = va.clone();
						vm1.lerpSelf( vb, 0.5 );

						vm2 = vc.clone();
						vm2.lerpSelf( vd, 0.5 );

						quadA.a = a;
						quadA.b = m1;
						quadA.c = m2;
						quadA.d = d;

						quadB.a = m1;
						quadB.b = b;
						quadB.c = c;
						quadB.d = m2;

						if ( face.vertexNormals.length === 4 ) {

							vnm1 = face.vertexNormals[ 0 ].clone();
							vnm1.lerpSelf( face.vertexNormals[ 1 ], 0.5 );

							vnm2 = face.vertexNormals[ 2 ].clone();
							vnm2.lerpSelf( face.vertexNormals[ 3 ], 0.5 );

							quadA.vertexNormals[ 1 ].copy( vnm1 );
							quadA.vertexNormals[ 2 ].copy( vnm2 );

							quadB.vertexNormals[ 0 ].copy( vnm1 );
							quadB.vertexNormals[ 3 ].copy( vnm2 );

						}

						if ( face.vertexColors.length === 4 ) {

							vcm1 = face.vertexColors[ 0 ].clone();
							vcm1.lerpSelf( face.vertexColors[ 1 ], 0.5 );

							vcm2 = face.vertexColors[ 2 ].clone();
							vcm2.lerpSelf( face.vertexColors[ 3 ], 0.5 );

							quadA.vertexColors[ 1 ].copy( vcm1 );
							quadA.vertexColors[ 2 ].copy( vcm2 );

							quadB.vertexColors[ 0 ].copy( vcm1 );
							quadB.vertexColors[ 3 ].copy( vcm2 );

						}

						edge = 0;

					} else {

						vm1 = vb.clone();
						vm1.lerpSelf( vc, 0.5 );

						vm2 = vd.clone();
						vm2.lerpSelf( va, 0.5 );

						quadA.a = a;
						quadA.b = b;
						quadA.c = m1;
						quadA.d = m2;

						quadB.a = m2;
						quadB.b = m1;
						quadB.c = c;
						quadB.d = d;

						if ( face.vertexNormals.length === 4 ) {

							vnm1 = face.vertexNormals[ 1 ].clone();
							vnm1.lerpSelf( face.vertexNormals[ 2 ], 0.5 );

							vnm2 = face.vertexNormals[ 3 ].clone();
							vnm2.lerpSelf( face.vertexNormals[ 0 ], 0.5 );

							quadA.vertexNormals[ 2 ].copy( vnm1 );
							quadA.vertexNormals[ 3 ].copy( vnm2 );

							quadB.vertexNormals[ 0 ].copy( vnm2 );
							quadB.vertexNormals[ 1 ].copy( vnm1 );

						}

						if ( face.vertexColors.length === 4 ) {

							vcm1 = face.vertexColors[ 1 ].clone();
							vcm1.lerpSelf( face.vertexColors[ 2 ], 0.5 );

							vcm2 = face.vertexColors[ 3 ].clone();
							vcm2.lerpSelf( face.vertexColors[ 0 ], 0.5 );

							quadA.vertexColors[ 2 ].copy( vcm1 );
							quadA.vertexColors[ 3 ].copy( vcm2 );

							quadB.vertexColors[ 0 ].copy( vcm2 );
							quadB.vertexColors[ 1 ].copy( vcm1 );

						}

						edge = 1;

					}

					faces.push( quadA, quadB );
					geometry.vertices.push( vm1, vm2 );

					var j, jl, uvs, uvA, uvB, uvC, uvD, uvM1, uvM2, uvsQuadA, uvsQuadB;

					for ( j = 0, jl = geometry.faceVertexUvs.length; j < jl; j ++ ) {

						if ( geometry.faceVertexUvs[ j ].length ) {

							uvs = geometry.faceVertexUvs[ j ][ i ];

							uvA = uvs[ 0 ];
							uvB = uvs[ 1 ];
							uvC = uvs[ 2 ];
							uvD = uvs[ 3 ];

							// AB + CD

							if ( edge === 0 ) {

								uvM1 = uvA.clone();
								uvM1.lerpSelf( uvB, 0.5 );

								uvM2 = uvC.clone();
								uvM2.lerpSelf( uvD, 0.5 );

								uvsQuadA = [ uvA.clone(), uvM1.clone(), uvM2.clone(), uvD.clone() ];
								uvsQuadB = [ uvM1.clone(), uvB.clone(), uvC.clone(), uvM2.clone() ];

							// BC + AD

							} else {

								uvM1 = uvB.clone();
								uvM1.lerpSelf( uvC, 0.5 );

								uvM2 = uvD.clone();
								uvM2.lerpSelf( uvA, 0.5 );

								uvsQuadA = [ uvA.clone(), uvB.clone(), uvM1.clone(), uvM2.clone() ];
								uvsQuadB = [ uvM2.clone(), uvM1.clone(), uvC.clone(), uvD.clone() ];

							}

							faceVertexUvs[ j ].push( uvsQuadA, uvsQuadB );

						}

					}

				} else {

					faces.push( face );

					for ( j = 0, jl = geometry.faceVertexUvs.length; j < jl; j ++ ) {

						faceVertexUvs[ j ].push( geometry.faceVertexUvs[ j ][ i ] );

					}

				}

			}

		}

		geometry.faces = faces;
		geometry.faceVertexUvs = faceVertexUvs;

	}

};

THREE.GeometryUtils.random = THREE.Math.random16;

THREE.GeometryUtils.__v1 = new THREE.Vector3();
/**
 * @author alteredq / http://alteredqualia.com/
 * @author mrdoob / http://mrdoob.com/
 */

THREE.ImageUtils = {

	crossOrigin: 'anonymous',

	loadTexture: function ( url, mapping, onLoad, onError ) {

		var image = new Image();
		var texture = new THREE.Texture( image, mapping );

		var loader = new THREE.ImageLoader();

		loader.addEventListener( 'load', function ( event ) {

			texture.image = event.content;
			texture.needsUpdate = true;

			if ( onLoad ) onLoad( texture );

		} );

		loader.addEventListener( 'error', function ( event ) {

			if ( onError ) onError( event.message );

		} );

		loader.crossOrigin = this.crossOrigin;
		loader.load( url, image );

		texture.sourceFile = url;

		return texture;

	},

	loadCompressedTexture: function ( url, mapping, onLoad, onError ) {

		var texture = new THREE.CompressedTexture();
		texture.mapping = mapping;

		var request = new XMLHttpRequest();

		request.onload = function () {

			var buffer = request.response;
			var dds = THREE.ImageUtils.parseDDS( buffer, true );

			texture.format = dds.format;

			texture.mipmaps = dds.mipmaps;
			texture.image.width = dds.width;
			texture.image.height = dds.height;

			// gl.generateMipmap fails for compressed textures
			// mipmaps must be embedded in the DDS file
			// or texture filters must not use mipmapping

			texture.generateMipmaps = false;

			texture.needsUpdate = true;

			if ( onLoad ) onLoad( texture );

		}

		request.onerror = onError;

		request.open( 'GET', url, true );
		request.responseType = "arraybuffer";
		request.send( null );

		return texture;

	},

	loadTextureCube: function ( array, mapping, onLoad, onError ) {

		var images = [];
		images.loadCount = 0;

		var texture = new THREE.Texture();
		texture.image = images;
		if ( mapping !== undefined ) texture.mapping = mapping;

		// no flipping needed for cube textures

		texture.flipY = false;

		for ( var i = 0, il = array.length; i < il; ++ i ) {

			var cubeImage = new Image();
			images[ i ] = cubeImage;

			cubeImage.onload = function () {

				images.loadCount += 1;

				if ( images.loadCount === 6 ) {

					texture.needsUpdate = true;
					if ( onLoad ) onLoad();

				}

			};

			cubeImage.onerror = onError;

			cubeImage.crossOrigin = this.crossOrigin;
			cubeImage.src = array[ i ];

		}

		return texture;

	},

	loadCompressedTextureCube: function ( array, mapping, onLoad, onError ) {

		var images = [];
		images.loadCount = 0;

		var texture = new THREE.CompressedTexture();
		texture.image = images;
		if ( mapping !== undefined ) texture.mapping = mapping;

		// no flipping for cube textures
		// (also flipping doesn't work for compressed textures )

		texture.flipY = false;

		// can't generate mipmaps for compressed textures
		// mips must be embedded in DDS files

		texture.generateMipmaps = false;

		var generateCubeFaceCallback = function ( rq, img ) {

			return function () {

				var buffer = rq.response;
				var dds = THREE.ImageUtils.parseDDS( buffer, true );

				img.format = dds.format;

				img.mipmaps = dds.mipmaps;
				img.width = dds.width;
				img.height = dds.height;

				images.loadCount += 1;

				if ( images.loadCount === 6 ) {

					texture.format = dds.format;
					texture.needsUpdate = true;
					if ( onLoad ) onLoad();

				}

			}

		}

		for ( var i = 0, il = array.length; i < il; ++ i ) {

			var cubeImage = {};
			images[ i ] = cubeImage;

			var request = new XMLHttpRequest();

			request.onload = generateCubeFaceCallback( request, cubeImage );
			request.onerror = onError;

			var url = array[ i ];

			request.open( 'GET', url, true );
			request.responseType = "arraybuffer";
			request.send( null );

		}

		return texture;

	},

	parseDDS: function ( buffer, loadMipmaps ) {

		var dds = { mipmaps: [], width: 0, height: 0, format: null, mipmapCount: 1 };

		// Adapted from @toji's DDS utils
		//	https://github.com/toji/webgl-texture-utils/blob/master/texture-util/dds.js

		// All values and structures referenced from:
		// http://msdn.microsoft.com/en-us/library/bb943991.aspx/

		var DDS_MAGIC = 0x20534444;

		var DDSD_CAPS = 0x1,
			DDSD_HEIGHT = 0x2,
			DDSD_WIDTH = 0x4,
			DDSD_PITCH = 0x8,
			DDSD_PIXELFORMAT = 0x1000,
			DDSD_MIPMAPCOUNT = 0x20000,
			DDSD_LINEARSIZE = 0x80000,
			DDSD_DEPTH = 0x800000;

		var DDSCAPS_COMPLEX = 0x8,
			DDSCAPS_MIPMAP = 0x400000,
			DDSCAPS_TEXTURE = 0x1000;

		var DDSCAPS2_CUBEMAP = 0x200,
			DDSCAPS2_CUBEMAP_POSITIVEX = 0x400,
			DDSCAPS2_CUBEMAP_NEGATIVEX = 0x800,
			DDSCAPS2_CUBEMAP_POSITIVEY = 0x1000,
			DDSCAPS2_CUBEMAP_NEGATIVEY = 0x2000,
			DDSCAPS2_CUBEMAP_POSITIVEZ = 0x4000,
			DDSCAPS2_CUBEMAP_NEGATIVEZ = 0x8000,
			DDSCAPS2_VOLUME = 0x200000;

		var DDPF_ALPHAPIXELS = 0x1,
			DDPF_ALPHA = 0x2,
			DDPF_FOURCC = 0x4,
			DDPF_RGB = 0x40,
			DDPF_YUV = 0x200,
			DDPF_LUMINANCE = 0x20000;

		function fourCCToInt32( value ) {

			return value.charCodeAt(0) +
				(value.charCodeAt(1) << 8) +
				(value.charCodeAt(2) << 16) +
				(value.charCodeAt(3) << 24);

		}

		function int32ToFourCC( value ) {

			return String.fromCharCode(
				value & 0xff,
				(value >> 8) & 0xff,
				(value >> 16) & 0xff,
				(value >> 24) & 0xff
			);
		}

		var FOURCC_DXT1 = fourCCToInt32("DXT1");
		var FOURCC_DXT3 = fourCCToInt32("DXT3");
		var FOURCC_DXT5 = fourCCToInt32("DXT5");

		var headerLengthInt = 31; // The header length in 32 bit ints

		// Offsets into the header array

		var off_magic = 0;

		var off_size = 1;
		var off_flags = 2;
		var off_height = 3;
		var off_width = 4;

		var off_mipmapCount = 7;

		var off_pfFlags = 20;
		var off_pfFourCC = 21;

		// Parse header

		var header = new Int32Array( buffer, 0, headerLengthInt );

        if ( header[ off_magic ] !== DDS_MAGIC ) {

            console.error( "ImageUtils.parseDDS(): Invalid magic number in DDS header" );
            return dds;

        }

        if ( ! header[ off_pfFlags ] & DDPF_FOURCC ) {

            console.error( "ImageUtils.parseDDS(): Unsupported format, must contain a FourCC code" );
            return dds;

        }

		var blockBytes;

		var fourCC = header[ off_pfFourCC ];

        switch ( fourCC ) {

			case FOURCC_DXT1:

				blockBytes = 8;
                dds.format = THREE.RGB_S3TC_DXT1_Format;
                break;

            case FOURCC_DXT3:

                blockBytes = 16;
                dds.format = THREE.RGBA_S3TC_DXT3_Format;
                break;

            case FOURCC_DXT5:

                blockBytes = 16;
                dds.format = THREE.RGBA_S3TC_DXT5_Format;
                break;

            default:

                console.error( "ImageUtils.parseDDS(): Unsupported FourCC code: ", int32ToFourCC( fourCC ) );
                return dds;

        }

		dds.mipmapCount = 1;

        if ( header[ off_flags ] & DDSD_MIPMAPCOUNT && loadMipmaps !== false ) {

            dds.mipmapCount = Math.max( 1, header[ off_mipmapCount ] );

        }

        dds.width = header[ off_width ];
        dds.height = header[ off_height ];

        var dataOffset = header[ off_size ] + 4;

		// Extract mipmaps buffers

		var width = dds.width;
		var height = dds.height;

		for ( var i = 0; i < dds.mipmapCount; i ++ ) {

			var dataLength = Math.max( 4, width ) / 4 * Math.max( 4, height ) / 4 * blockBytes;
			var byteArray = new Uint8Array( buffer, dataOffset, dataLength );

			var mipmap = { "data": byteArray, "width": width, "height": height };
			dds.mipmaps.push( mipmap );

			dataOffset += dataLength;

			width = Math.max( width * 0.5, 1 );
			height = Math.max( height * 0.5, 1 );

		}

		return dds;

	},

	getNormalMap: function ( image, depth ) {

		// Adapted from http://www.paulbrunt.co.uk/lab/heightnormal/

		var cross = function ( a, b ) {

			return [ a[ 1 ] * b[ 2 ] - a[ 2 ] * b[ 1 ], a[ 2 ] * b[ 0 ] - a[ 0 ] * b[ 2 ], a[ 0 ] * b[ 1 ] - a[ 1 ] * b[ 0 ] ];

		}

		var subtract = function ( a, b ) {

			return [ a[ 0 ] - b[ 0 ], a[ 1 ] - b[ 1 ], a[ 2 ] - b[ 2 ] ];

		}

		var normalize = function ( a ) {

			var l = Math.sqrt( a[ 0 ] * a[ 0 ] + a[ 1 ] * a[ 1 ] + a[ 2 ] * a[ 2 ] );
			return [ a[ 0 ] / l, a[ 1 ] / l, a[ 2 ] / l ];

		}

		depth = depth | 1;

		var width = image.width;
		var height = image.height;

		var canvas = document.createElement( 'canvas' );
		canvas.width = width;
		canvas.height = height;

		var context = canvas.getContext( '2d' );
		context.drawImage( image, 0, 0 );

		var data = context.getImageData( 0, 0, width, height ).data;
		var imageData = context.createImageData( width, height );
		var output = imageData.data;

		for ( var x = 0; x < width; x ++ ) {

			for ( var y = 0; y < height; y ++ ) {

				var ly = y - 1 < 0 ? 0 : y - 1;
				var uy = y + 1 > height - 1 ? height - 1 : y + 1;
				var lx = x - 1 < 0 ? 0 : x - 1;
				var ux = x + 1 > width - 1 ? width - 1 : x + 1;

				var points = [];
				var origin = [ 0, 0, data[ ( y * width + x ) * 4 ] / 255 * depth ];
				points.push( [ - 1, 0, data[ ( y * width + lx ) * 4 ] / 255 * depth ] );
				points.push( [ - 1, - 1, data[ ( ly * width + lx ) * 4 ] / 255 * depth ] );
				points.push( [ 0, - 1, data[ ( ly * width + x ) * 4 ] / 255 * depth ] );
				points.push( [  1, - 1, data[ ( ly * width + ux ) * 4 ] / 255 * depth ] );
				points.push( [ 1, 0, data[ ( y * width + ux ) * 4 ] / 255 * depth ] );
				points.push( [ 1, 1, data[ ( uy * width + ux ) * 4 ] / 255 * depth ] );
				points.push( [ 0, 1, data[ ( uy * width + x ) * 4 ] / 255 * depth ] );
				points.push( [ - 1, 1, data[ ( uy * width + lx ) * 4 ] / 255 * depth ] );

				var normals = [];
				var num_points = points.length;

				for ( var i = 0; i < num_points; i ++ ) {

					var v1 = points[ i ];
					var v2 = points[ ( i + 1 ) % num_points ];
					v1 = subtract( v1, origin );
					v2 = subtract( v2, origin );
					normals.push( normalize( cross( v1, v2 ) ) );

				}

				var normal = [ 0, 0, 0 ];

				for ( var i = 0; i < normals.length; i ++ ) {

					normal[ 0 ] += normals[ i ][ 0 ];
					normal[ 1 ] += normals[ i ][ 1 ];
					normal[ 2 ] += normals[ i ][ 2 ];

				}

				normal[ 0 ] /= normals.length;
				normal[ 1 ] /= normals.length;
				normal[ 2 ] /= normals.length;

				var idx = ( y * width + x ) * 4;

				output[ idx ] = ( ( normal[ 0 ] + 1.0 ) / 2.0 * 255 ) | 0;
				output[ idx + 1 ] = ( ( normal[ 1 ] + 1.0 ) / 2.0 * 255 ) | 0;
				output[ idx + 2 ] = ( normal[ 2 ] * 255 ) | 0;
				output[ idx + 3 ] = 255;

			}

		}

		context.putImageData( imageData, 0, 0 );

		return canvas;

	},

	generateDataTexture: function ( width, height, color ) {

		var size = width * height;
		var data = new Uint8Array( 3 * size );

		var r = Math.floor( color.r * 255 );
		var g = Math.floor( color.g * 255 );
		var b = Math.floor( color.b * 255 );

		for ( var i = 0; i < size; i ++ ) {

			data[ i * 3 ] 	  = r;
			data[ i * 3 + 1 ] = g;
			data[ i * 3 + 2 ] = b;

		}

		var texture = new THREE.DataTexture( data, width, height, THREE.RGBFormat );
		texture.needsUpdate = true;

		return texture;

	}

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.SceneUtils = {

	createMultiMaterialObject: function ( geometry, materials ) {

		var group = new THREE.Object3D();

		for ( var i = 0, l = materials.length; i < l; i ++ ) {

			group.add( new THREE.Mesh( geometry, materials[ i ] ) );

		}

		return group;

	},

	detach : function ( child, parent, scene ) {

		child.applyMatrix( parent.matrixWorld );
		parent.remove( child );
		scene.add( child );

	},

	attach: function ( child, scene, parent ) {

		var matrixWorldInverse = new THREE.Matrix4();
		matrixWorldInverse.getInverse( parent.matrixWorld );
		child.applyMatrix( matrixWorldInverse );

		scene.remove( child );
		parent.add( child );

	}

};
/**
 * @author alteredq / http://alteredqualia.com/
 * @author mrdoob / http://mrdoob.com/
 *
 * ShaderUtils currently contains:
 *
 *	fresnel
 *	normal
 * 	cube
 *
 */

THREE.ShaderUtils = {

	lib: {

		/* -------------------------------------------------------------------------
		//	Fresnel shader
		//	- based on Nvidia Cg tutorial
		 ------------------------------------------------------------------------- */

		'fresnel': {

			uniforms: {

				"mRefractionRatio": { type: "f", value: 1.02 },
				"mFresnelBias": { type: "f", value: 0.1 },
				"mFresnelPower": { type: "f", value: 2.0 },
				"mFresnelScale": { type: "f", value: 1.0 },
				"tCube": { type: "t", value: null }

			},

			fragmentShader: [

				"uniform samplerCube tCube;",

				"varying vec3 vReflect;",
				"varying vec3 vRefract[3];",
				"varying float vReflectionFactor;",

				"void main() {",

					"vec4 reflectedColor = textureCube( tCube, vec3( -vReflect.x, vReflect.yz ) );",
					"vec4 refractedColor = vec4( 1.0 );",

					"refractedColor.r = textureCube( tCube, vec3( -vRefract[0].x, vRefract[0].yz ) ).r;",
					"refractedColor.g = textureCube( tCube, vec3( -vRefract[1].x, vRefract[1].yz ) ).g;",
					"refractedColor.b = textureCube( tCube, vec3( -vRefract[2].x, vRefract[2].yz ) ).b;",

					"gl_FragColor = mix( refractedColor, reflectedColor, clamp( vReflectionFactor, 0.0, 1.0 ) );",

				"}"

			].join("\n"),

			vertexShader: [

				"uniform float mRefractionRatio;",
				"uniform float mFresnelBias;",
				"uniform float mFresnelScale;",
				"uniform float mFresnelPower;",

				"varying vec3 vReflect;",
				"varying vec3 vRefract[3];",
				"varying float vReflectionFactor;",

				"void main() {",

					"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
					"vec4 worldPosition = modelMatrix * vec4( position, 1.0 );",

					"vec3 worldNormal = normalize( mat3( modelMatrix[0].xyz, modelMatrix[1].xyz, modelMatrix[2].xyz ) * normal );",

					"vec3 I = worldPosition.xyz - cameraPosition;",

					"vReflect = reflect( I, worldNormal );",
					"vRefract[0] = refract( normalize( I ), worldNormal, mRefractionRatio );",
					"vRefract[1] = refract( normalize( I ), worldNormal, mRefractionRatio * 0.99 );",
					"vRefract[2] = refract( normalize( I ), worldNormal, mRefractionRatio * 0.98 );",
					"vReflectionFactor = mFresnelBias + mFresnelScale * pow( 1.0 + dot( normalize( I ), worldNormal ), mFresnelPower );",

					"gl_Position = projectionMatrix * mvPosition;",

				"}"

			].join("\n")

		},

		/* -------------------------------------------------------------------------
		//	Normal map shader
		//		- Blinn-Phong
		//		- normal + diffuse + specular + AO + displacement + reflection + shadow maps
		//		- point and directional lights (use with "lights: true" material option)
		 ------------------------------------------------------------------------- */

		'normal' : {

			uniforms: THREE.UniformsUtils.merge( [

				THREE.UniformsLib[ "fog" ],
				THREE.UniformsLib[ "lights" ],
				THREE.UniformsLib[ "shadowmap" ],

				{

				"enableAO"		  : { type: "i", value: 0 },
				"enableDiffuse"	  : { type: "i", value: 0 },
				"enableSpecular"  : { type: "i", value: 0 },
				"enableReflection": { type: "i", value: 0 },
				"enableDisplacement": { type: "i", value: 0 },

				"tDisplacement": { type: "t", value: null }, // must go first as this is vertex texture
				"tDiffuse"	   : { type: "t", value: null },
				"tCube"		   : { type: "t", value: null },
				"tNormal"	   : { type: "t", value: null },
				"tSpecular"	   : { type: "t", value: null },
				"tAO"		   : { type: "t", value: null },

				"uNormalScale": { type: "v2", value: new THREE.Vector2( 1, 1 ) },

				"uDisplacementBias": { type: "f", value: 0.0 },
				"uDisplacementScale": { type: "f", value: 1.0 },

				"uDiffuseColor": { type: "c", value: new THREE.Color( 0xffffff ) },
				"uSpecularColor": { type: "c", value: new THREE.Color( 0x111111 ) },
				"uAmbientColor": { type: "c", value: new THREE.Color( 0xffffff ) },
				"uShininess": { type: "f", value: 30 },
				"uOpacity": { type: "f", value: 1 },

				"useRefract": { type: "i", value: 0 },
				"uRefractionRatio": { type: "f", value: 0.98 },
				"uReflectivity": { type: "f", value: 0.5 },

				"uOffset" : { type: "v2", value: new THREE.Vector2( 0, 0 ) },
				"uRepeat" : { type: "v2", value: new THREE.Vector2( 1, 1 ) },

				"wrapRGB"  : { type: "v3", value: new THREE.Vector3( 1, 1, 1 ) }

				}

			] ),

			fragmentShader: [

				"uniform vec3 uAmbientColor;",
				"uniform vec3 uDiffuseColor;",
				"uniform vec3 uSpecularColor;",
				"uniform float uShininess;",
				"uniform float uOpacity;",

				"uniform bool enableDiffuse;",
				"uniform bool enableSpecular;",
				"uniform bool enableAO;",
				"uniform bool enableReflection;",

				"uniform sampler2D tDiffuse;",
				"uniform sampler2D tNormal;",
				"uniform sampler2D tSpecular;",
				"uniform sampler2D tAO;",

				"uniform samplerCube tCube;",

				"uniform vec2 uNormalScale;",

				"uniform bool useRefract;",
				"uniform float uRefractionRatio;",
				"uniform float uReflectivity;",

				"varying vec3 vTangent;",
				"varying vec3 vBinormal;",
				"varying vec3 vNormal;",
				"varying vec2 vUv;",

				"uniform vec3 ambientLightColor;",

				"#if MAX_DIR_LIGHTS > 0",

					"uniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];",
					"uniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];",

				"#endif",

				"#if MAX_HEMI_LIGHTS > 0",

					"uniform vec3 hemisphereLightSkyColor[ MAX_HEMI_LIGHTS ];",
					"uniform vec3 hemisphereLightGroundColor[ MAX_HEMI_LIGHTS ];",
					"uniform vec3 hemisphereLightDirection[ MAX_HEMI_LIGHTS ];",

				"#endif",

				"#if MAX_POINT_LIGHTS > 0",

					"uniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];",
					"uniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];",
					"uniform float pointLightDistance[ MAX_POINT_LIGHTS ];",

				"#endif",

				"#if MAX_SPOT_LIGHTS > 0",

					"uniform vec3 spotLightColor[ MAX_SPOT_LIGHTS ];",
					"uniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];",
					"uniform vec3 spotLightDirection[ MAX_SPOT_LIGHTS ];",
					"uniform float spotLightAngleCos[ MAX_SPOT_LIGHTS ];",
					"uniform float spotLightExponent[ MAX_SPOT_LIGHTS ];",
					"uniform float spotLightDistance[ MAX_SPOT_LIGHTS ];",

				"#endif",

				"#ifdef WRAP_AROUND",

					"uniform vec3 wrapRGB;",

				"#endif",

				"varying vec3 vWorldPosition;",
				"varying vec3 vViewPosition;",

				THREE.ShaderChunk[ "shadowmap_pars_fragment" ],
				THREE.ShaderChunk[ "fog_pars_fragment" ],

				"void main() {",

					"gl_FragColor = vec4( vec3( 1.0 ), uOpacity );",

					"vec3 specularTex = vec3( 1.0 );",

					"vec3 normalTex = texture2D( tNormal, vUv ).xyz * 2.0 - 1.0;",
					"normalTex.xy *= uNormalScale;",
					"normalTex = normalize( normalTex );",

					"if( enableDiffuse ) {",

						"#ifdef GAMMA_INPUT",

							"vec4 texelColor = texture2D( tDiffuse, vUv );",
							"texelColor.xyz *= texelColor.xyz;",

							"gl_FragColor = gl_FragColor * texelColor;",

						"#else",

							"gl_FragColor = gl_FragColor * texture2D( tDiffuse, vUv );",

						"#endif",

					"}",

					"if( enableAO ) {",

						"#ifdef GAMMA_INPUT",

							"vec4 aoColor = texture2D( tAO, vUv );",
							"aoColor.xyz *= aoColor.xyz;",

							"gl_FragColor.xyz = gl_FragColor.xyz * aoColor.xyz;",

						"#else",

							"gl_FragColor.xyz = gl_FragColor.xyz * texture2D( tAO, vUv ).xyz;",

						"#endif",

					"}",

					"if( enableSpecular )",
						"specularTex = texture2D( tSpecular, vUv ).xyz;",

					"mat3 tsb = mat3( normalize( vTangent ), normalize( vBinormal ), normalize( vNormal ) );",
					"vec3 finalNormal = tsb * normalTex;",

					"#ifdef FLIP_SIDED",

						"finalNormal = -finalNormal;",

					"#endif",

					"vec3 normal = normalize( finalNormal );",
					"vec3 viewPosition = normalize( vViewPosition );",

					// point lights

					"#if MAX_POINT_LIGHTS > 0",

						"vec3 pointDiffuse = vec3( 0.0 );",
						"vec3 pointSpecular = vec3( 0.0 );",

						"for ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {",

							"vec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );",
							"vec3 pointVector = lPosition.xyz + vViewPosition.xyz;",

							"float pointDistance = 1.0;",
							"if ( pointLightDistance[ i ] > 0.0 )",
								"pointDistance = 1.0 - min( ( length( pointVector ) / pointLightDistance[ i ] ), 1.0 );",

							"pointVector = normalize( pointVector );",

							// diffuse

							"#ifdef WRAP_AROUND",

								"float pointDiffuseWeightFull = max( dot( normal, pointVector ), 0.0 );",
								"float pointDiffuseWeightHalf = max( 0.5 * dot( normal, pointVector ) + 0.5, 0.0 );",

								"vec3 pointDiffuseWeight = mix( vec3 ( pointDiffuseWeightFull ), vec3( pointDiffuseWeightHalf ), wrapRGB );",

							"#else",

								"float pointDiffuseWeight = max( dot( normal, pointVector ), 0.0 );",

							"#endif",

							"pointDiffuse += pointDistance * pointLightColor[ i ] * uDiffuseColor * pointDiffuseWeight;",

							// specular

							"vec3 pointHalfVector = normalize( pointVector + viewPosition );",
							"float pointDotNormalHalf = max( dot( normal, pointHalfVector ), 0.0 );",
							"float pointSpecularWeight = specularTex.r * max( pow( pointDotNormalHalf, uShininess ), 0.0 );",

							"#ifdef PHYSICALLY_BASED_SHADING",

								// 2.0 => 2.0001 is hack to work around ANGLE bug

								"float specularNormalization = ( uShininess + 2.0001 ) / 8.0;",

								"vec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( pointVector, pointHalfVector ), 5.0 );",
								"pointSpecular += schlick * pointLightColor[ i ] * pointSpecularWeight * pointDiffuseWeight * pointDistance * specularNormalization;",

							"#else",

								"pointSpecular += pointDistance * pointLightColor[ i ] * uSpecularColor * pointSpecularWeight * pointDiffuseWeight;",

							"#endif",

						"}",

					"#endif",

					// spot lights

					"#if MAX_SPOT_LIGHTS > 0",

						"vec3 spotDiffuse = vec3( 0.0 );",
						"vec3 spotSpecular = vec3( 0.0 );",

						"for ( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {",

							"vec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );",
							"vec3 spotVector = lPosition.xyz + vViewPosition.xyz;",

							"float spotDistance = 1.0;",
							"if ( spotLightDistance[ i ] > 0.0 )",
								"spotDistance = 1.0 - min( ( length( spotVector ) / spotLightDistance[ i ] ), 1.0 );",

							"spotVector = normalize( spotVector );",

							"float spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - vWorldPosition ) );",

							"if ( spotEffect > spotLightAngleCos[ i ] ) {",

								"spotEffect = max( pow( spotEffect, spotLightExponent[ i ] ), 0.0 );",

								// diffuse

								"#ifdef WRAP_AROUND",

									"float spotDiffuseWeightFull = max( dot( normal, spotVector ), 0.0 );",
									"float spotDiffuseWeightHalf = max( 0.5 * dot( normal, spotVector ) + 0.5, 0.0 );",

									"vec3 spotDiffuseWeight = mix( vec3 ( spotDiffuseWeightFull ), vec3( spotDiffuseWeightHalf ), wrapRGB );",

								"#else",

									"float spotDiffuseWeight = max( dot( normal, spotVector ), 0.0 );",

								"#endif",

								"spotDiffuse += spotDistance * spotLightColor[ i ] * uDiffuseColor * spotDiffuseWeight * spotEffect;",

								// specular

								"vec3 spotHalfVector = normalize( spotVector + viewPosition );",
								"float spotDotNormalHalf = max( dot( normal, spotHalfVector ), 0.0 );",
								"float spotSpecularWeight = specularTex.r * max( pow( spotDotNormalHalf, uShininess ), 0.0 );",

								"#ifdef PHYSICALLY_BASED_SHADING",

									// 2.0 => 2.0001 is hack to work around ANGLE bug

									"float specularNormalization = ( uShininess + 2.0001 ) / 8.0;",

									"vec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( spotVector, spotHalfVector ), 5.0 );",
									"spotSpecular += schlick * spotLightColor[ i ] * spotSpecularWeight * spotDiffuseWeight * spotDistance * specularNormalization * spotEffect;",

								"#else",

									"spotSpecular += spotDistance * spotLightColor[ i ] * uSpecularColor * spotSpecularWeight * spotDiffuseWeight * spotEffect;",

								"#endif",

							"}",

						"}",

					"#endif",

					// directional lights

					"#if MAX_DIR_LIGHTS > 0",

						"vec3 dirDiffuse = vec3( 0.0 );",
						"vec3 dirSpecular = vec3( 0.0 );",

						"for( int i = 0; i < MAX_DIR_LIGHTS; i++ ) {",

							"vec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );",
							"vec3 dirVector = normalize( lDirection.xyz );",

							// diffuse

							"#ifdef WRAP_AROUND",

								"float directionalLightWeightingFull = max( dot( normal, dirVector ), 0.0 );",
								"float directionalLightWeightingHalf = max( 0.5 * dot( normal, dirVector ) + 0.5, 0.0 );",

								"vec3 dirDiffuseWeight = mix( vec3( directionalLightWeightingFull ), vec3( directionalLightWeightingHalf ), wrapRGB );",

							"#else",

								"float dirDiffuseWeight = max( dot( normal, dirVector ), 0.0 );",

							"#endif",

							"dirDiffuse += directionalLightColor[ i ] * uDiffuseColor * dirDiffuseWeight;",

							// specular

							"vec3 dirHalfVector = normalize( dirVector + viewPosition );",
							"float dirDotNormalHalf = max( dot( normal, dirHalfVector ), 0.0 );",
							"float dirSpecularWeight = specularTex.r * max( pow( dirDotNormalHalf, uShininess ), 0.0 );",

							"#ifdef PHYSICALLY_BASED_SHADING",

								// 2.0 => 2.0001 is hack to work around ANGLE bug

								"float specularNormalization = ( uShininess + 2.0001 ) / 8.0;",

								"vec3 schlick = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( dirVector, dirHalfVector ), 5.0 );",
								"dirSpecular += schlick * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight * specularNormalization;",

							"#else",

								"dirSpecular += directionalLightColor[ i ] * uSpecularColor * dirSpecularWeight * dirDiffuseWeight;",

							"#endif",

						"}",

					"#endif",

					// hemisphere lights

					"#if MAX_HEMI_LIGHTS > 0",

						"vec3 hemiDiffuse  = vec3( 0.0 );",
						"vec3 hemiSpecular = vec3( 0.0 );" ,

						"for( int i = 0; i < MAX_HEMI_LIGHTS; i ++ ) {",

							"vec4 lDirection = viewMatrix * vec4( hemisphereLightDirection[ i ], 0.0 );",
							"vec3 lVector = normalize( lDirection.xyz );",

							// diffuse

							"float dotProduct = dot( normal, lVector );",
							"float hemiDiffuseWeight = 0.5 * dotProduct + 0.5;",

							"vec3 hemiColor = mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );",

							"hemiDiffuse += uDiffuseColor * hemiColor;",

							// specular (sky light)


							"vec3 hemiHalfVectorSky = normalize( lVector + viewPosition );",
							"float hemiDotNormalHalfSky = 0.5 * dot( normal, hemiHalfVectorSky ) + 0.5;",
							"float hemiSpecularWeightSky = specularTex.r * max( pow( hemiDotNormalHalfSky, uShininess ), 0.0 );",

							// specular (ground light)

							"vec3 lVectorGround = -lVector;",

							"vec3 hemiHalfVectorGround = normalize( lVectorGround + viewPosition );",
							"float hemiDotNormalHalfGround = 0.5 * dot( normal, hemiHalfVectorGround ) + 0.5;",
							"float hemiSpecularWeightGround = specularTex.r * max( pow( hemiDotNormalHalfGround, uShininess ), 0.0 );",

							"#ifdef PHYSICALLY_BASED_SHADING",

								"float dotProductGround = dot( normal, lVectorGround );",

								// 2.0 => 2.0001 is hack to work around ANGLE bug

								"float specularNormalization = ( uShininess + 2.0001 ) / 8.0;",

								"vec3 schlickSky = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( lVector, hemiHalfVectorSky ), 5.0 );",
								"vec3 schlickGround = uSpecularColor + vec3( 1.0 - uSpecularColor ) * pow( 1.0 - dot( lVectorGround, hemiHalfVectorGround ), 5.0 );",
								"hemiSpecular += hemiColor * specularNormalization * ( schlickSky * hemiSpecularWeightSky * max( dotProduct, 0.0 ) + schlickGround * hemiSpecularWeightGround * max( dotProductGround, 0.0 ) );",

							"#else",

								"hemiSpecular += uSpecularColor * hemiColor * ( hemiSpecularWeightSky + hemiSpecularWeightGround ) * hemiDiffuseWeight;",

							"#endif",

						"}",

					"#endif",

					// all lights contribution summation

					"vec3 totalDiffuse = vec3( 0.0 );",
					"vec3 totalSpecular = vec3( 0.0 );",

					"#if MAX_DIR_LIGHTS > 0",

						"totalDiffuse += dirDiffuse;",
						"totalSpecular += dirSpecular;",

					"#endif",

					"#if MAX_HEMI_LIGHTS > 0",

						"totalDiffuse += hemiDiffuse;",
						"totalSpecular += hemiSpecular;",

					"#endif",

					"#if MAX_POINT_LIGHTS > 0",

						"totalDiffuse += pointDiffuse;",
						"totalSpecular += pointSpecular;",

					"#endif",

					"#if MAX_SPOT_LIGHTS > 0",

						"totalDiffuse += spotDiffuse;",
						"totalSpecular += spotSpecular;",

					"#endif",

					"#ifdef METAL",

						"gl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor + totalSpecular );",

					"#else",

						"gl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor ) + totalSpecular;",

					"#endif",

					"if ( enableReflection ) {",

						"vec3 vReflect;",
						"vec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );",

						"if ( useRefract ) {",

							"vReflect = refract( cameraToVertex, normal, uRefractionRatio );",

						"} else {",

							"vReflect = reflect( cameraToVertex, normal );",

						"}",

						"vec4 cubeColor = textureCube( tCube, vec3( -vReflect.x, vReflect.yz ) );",

						"#ifdef GAMMA_INPUT",

							"cubeColor.xyz *= cubeColor.xyz;",

						"#endif",

						"gl_FragColor.xyz = mix( gl_FragColor.xyz, cubeColor.xyz, specularTex.r * uReflectivity );",

					"}",

					THREE.ShaderChunk[ "shadowmap_fragment" ],
					THREE.ShaderChunk[ "linear_to_gamma_fragment" ],
					THREE.ShaderChunk[ "fog_fragment" ],

				"}"

			].join("\n"),

			vertexShader: [

				"attribute vec4 tangent;",

				"uniform vec2 uOffset;",
				"uniform vec2 uRepeat;",

				"uniform bool enableDisplacement;",

				"#ifdef VERTEX_TEXTURES",

					"uniform sampler2D tDisplacement;",
					"uniform float uDisplacementScale;",
					"uniform float uDisplacementBias;",

				"#endif",

				"varying vec3 vTangent;",
				"varying vec3 vBinormal;",
				"varying vec3 vNormal;",
				"varying vec2 vUv;",

				"varying vec3 vWorldPosition;",
				"varying vec3 vViewPosition;",

				THREE.ShaderChunk[ "skinning_pars_vertex" ],
				THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

				"void main() {",

					THREE.ShaderChunk[ "skinbase_vertex" ],
					THREE.ShaderChunk[ "skinnormal_vertex" ],

					// normal, tangent and binormal vectors

					"#ifdef USE_SKINNING",

						"vNormal = normalize( normalMatrix * skinnedNormal.xyz );",

						"vec4 skinnedTangent = skinMatrix * vec4( tangent.xyz, 0.0 );",
						"vTangent = normalize( normalMatrix * skinnedTangent.xyz );",

					"#else",

						"vNormal = normalize( normalMatrix * normal );",
						"vTangent = normalize( normalMatrix * tangent.xyz );",

					"#endif",

					"vBinormal = normalize( cross( vNormal, vTangent ) * tangent.w );",

					"vUv = uv * uRepeat + uOffset;",

					// displacement mapping

					"vec3 displacedPosition;",

					"#ifdef VERTEX_TEXTURES",

						"if ( enableDisplacement ) {",

							"vec3 dv = texture2D( tDisplacement, uv ).xyz;",
							"float df = uDisplacementScale * dv.x + uDisplacementBias;",
							"displacedPosition = position + normalize( normal ) * df;",

						"} else {",

							"#ifdef USE_SKINNING",

								"vec4 skinVertex = vec4( position, 1.0 );",

								"vec4 skinned  = boneMatX * skinVertex * skinWeight.x;",
								"skinned 	  += boneMatY * skinVertex * skinWeight.y;",

								"displacedPosition  = skinned.xyz;",

							"#else",

								"displacedPosition = position;",

							"#endif",

						"}",

					"#else",

						"#ifdef USE_SKINNING",

							"vec4 skinVertex = vec4( position, 1.0 );",

							"vec4 skinned  = boneMatX * skinVertex * skinWeight.x;",
							"skinned 	  += boneMatY * skinVertex * skinWeight.y;",

							"displacedPosition  = skinned.xyz;",

						"#else",

							"displacedPosition = position;",

						"#endif",

					"#endif",

					//

					"vec4 mvPosition = modelViewMatrix * vec4( displacedPosition, 1.0 );",
					"vec4 worldPosition = modelMatrix * vec4( displacedPosition, 1.0 );",

					"gl_Position = projectionMatrix * mvPosition;",

					//

					"vWorldPosition = worldPosition.xyz;",
					"vViewPosition = -mvPosition.xyz;",

					// shadows

					"#ifdef USE_SHADOWMAP",

						"for( int i = 0; i < MAX_SHADOWS; i ++ ) {",

							"vShadowCoord[ i ] = shadowMatrix[ i ] * worldPosition;",

						"}",

					"#endif",

				"}"

			].join("\n")

		},

		/* -------------------------------------------------------------------------
		//	Cube map shader
		 ------------------------------------------------------------------------- */

		'cube': {

			uniforms: { "tCube": { type: "t", value: null },
						"tFlip": { type: "f", value: -1 } },

			vertexShader: [

				"varying vec3 vWorldPosition;",

				"void main() {",

					"vec4 worldPosition = modelMatrix * vec4( position, 1.0 );",
					"vWorldPosition = worldPosition.xyz;",

					"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",

				"}"

			].join("\n"),

			fragmentShader: [

				"uniform samplerCube tCube;",
				"uniform float tFlip;",

				"varying vec3 vWorldPosition;",

				"void main() {",

					"gl_FragColor = textureCube( tCube, vec3( tFlip * vWorldPosition.x, vWorldPosition.yz ) );",

				"}"

			].join("\n")

		}

	}

};
/**
 * @author zz85 / http://www.lab4games.net/zz85/blog
 * @author alteredq / http://alteredqualia.com/
 *
 * For Text operations in three.js (See TextGeometry)
 *
 * It uses techniques used in:
 *
 * 	typeface.js and canvastext
 * 		For converting fonts and rendering with javascript
 *		http://typeface.neocracy.org
 *
 *	Triangulation ported from AS3
 *		Simple Polygon Triangulation
 *		http://actionsnippet.com/?p=1462
 *
 * 	A Method to triangulate shapes with holes
 *		http://www.sakri.net/blog/2009/06/12/an-approach-to-triangulating-polygons-with-holes/
 *
 */

THREE.FontUtils = {

	faces : {},

	// Just for now. face[weight][style]

	face : "helvetiker",
	weight: "normal",
	style : "normal",
	size : 150,
	divisions : 10,

	getFace : function() {

		return this.faces[ this.face ][ this.weight ][ this.style ];

	},

	loadFace : function( data ) {

		var family = data.familyName.toLowerCase();

		var ThreeFont = this;

		ThreeFont.faces[ family ] = ThreeFont.faces[ family ] || {};

		ThreeFont.faces[ family ][ data.cssFontWeight ] = ThreeFont.faces[ family ][ data.cssFontWeight ] || {};
		ThreeFont.faces[ family ][ data.cssFontWeight ][ data.cssFontStyle ] = data;

		var face = ThreeFont.faces[ family ][ data.cssFontWeight ][ data.cssFontStyle ] = data;

		return data;

	},

	drawText : function( text ) {

		var characterPts = [], allPts = [];

		// RenderText

		var i, p,
			face = this.getFace(),
			scale = this.size / face.resolution,
			offset = 0,
			chars = String( text ).split( '' ),
			length = chars.length;

		var fontPaths = [];

		for ( i = 0; i < length; i ++ ) {

			var path = new THREE.Path();

			var ret = this.extractGlyphPoints( chars[ i ], face, scale, offset, path );
			offset += ret.offset;

			fontPaths.push( ret.path );

		}

		// get the width

		var width = offset / 2;
		//
		// for ( p = 0; p < allPts.length; p++ ) {
		//
		// 	allPts[ p ].x -= width;
		//
		// }

		//var extract = this.extractPoints( allPts, characterPts );
		//extract.contour = allPts;

		//extract.paths = fontPaths;
		//extract.offset = width;

		return { paths : fontPaths, offset : width };

	},




	extractGlyphPoints : function( c, face, scale, offset, path ) {

		var pts = [];

		var i, i2, divisions,
			outline, action, length,
			scaleX, scaleY,
			x, y, cpx, cpy, cpx0, cpy0, cpx1, cpy1, cpx2, cpy2,
			laste,
			glyph = face.glyphs[ c ] || face.glyphs[ '?' ];

		if ( !glyph ) return;

		if ( glyph.o ) {

			outline = glyph._cachedOutline || ( glyph._cachedOutline = glyph.o.split( ' ' ) );
			length = outline.length;

			scaleX = scale;
			scaleY = scale;

			for ( i = 0; i < length; ) {

				action = outline[ i ++ ];

				//console.log( action );

				switch( action ) {

				case 'm':

					// Move To

					x = outline[ i++ ] * scaleX + offset;
					y = outline[ i++ ] * scaleY;

					path.moveTo( x, y );
					break;

				case 'l':

					// Line To

					x = outline[ i++ ] * scaleX + offset;
					y = outline[ i++ ] * scaleY;
					path.lineTo(x,y);
					break;

				case 'q':

					// QuadraticCurveTo

					cpx  = outline[ i++ ] * scaleX + offset;
					cpy  = outline[ i++ ] * scaleY;
					cpx1 = outline[ i++ ] * scaleX + offset;
					cpy1 = outline[ i++ ] * scaleY;

					path.quadraticCurveTo(cpx1, cpy1, cpx, cpy);

					laste = pts[ pts.length - 1 ];

					if ( laste ) {

						cpx0 = laste.x;
						cpy0 = laste.y;

						for ( i2 = 1, divisions = this.divisions; i2 <= divisions; i2 ++ ) {

							var t = i2 / divisions;
							var tx = THREE.Shape.Utils.b2( t, cpx0, cpx1, cpx );
							var ty = THREE.Shape.Utils.b2( t, cpy0, cpy1, cpy );
					  }

				  }

				  break;

				case 'b':

					// Cubic Bezier Curve

					cpx  = outline[ i++ ] *  scaleX + offset;
					cpy  = outline[ i++ ] *  scaleY;
					cpx1 = outline[ i++ ] *  scaleX + offset;
					cpy1 = outline[ i++ ] * -scaleY;
					cpx2 = outline[ i++ ] *  scaleX + offset;
					cpy2 = outline[ i++ ] * -scaleY;

					path.bezierCurveTo( cpx, cpy, cpx1, cpy1, cpx2, cpy2 );

					laste = pts[ pts.length - 1 ];

					if ( laste ) {

						cpx0 = laste.x;
						cpy0 = laste.y;

						for ( i2 = 1, divisions = this.divisions; i2 <= divisions; i2 ++ ) {

							var t = i2 / divisions;
							var tx = THREE.Shape.Utils.b3( t, cpx0, cpx1, cpx2, cpx );
							var ty = THREE.Shape.Utils.b3( t, cpy0, cpy1, cpy2, cpy );

						}

					}

					break;

				}

			}
		}



		return { offset: glyph.ha*scale, path:path};
	}

};


THREE.FontUtils.generateShapes = function( text, parameters ) {

	// Parameters

	parameters = parameters || {};

	var size = parameters.size !== undefined ? parameters.size : 100;
	var curveSegments = parameters.curveSegments !== undefined ? parameters.curveSegments: 4;

	var font = parameters.font !== undefined ? parameters.font : "helvetiker";
	var weight = parameters.weight !== undefined ? parameters.weight : "normal";
	var style = parameters.style !== undefined ? parameters.style : "normal";

	THREE.FontUtils.size = size;
	THREE.FontUtils.divisions = curveSegments;

	THREE.FontUtils.face = font;
	THREE.FontUtils.weight = weight;
	THREE.FontUtils.style = style;

	// Get a Font data json object

	var data = THREE.FontUtils.drawText( text );

	var paths = data.paths;
	var shapes = [];

	for ( var p = 0, pl = paths.length; p < pl; p ++ ) {

		Array.prototype.push.apply( shapes, paths[ p ].toShapes() );

	}

	return shapes;

};


/**
 * This code is a quick port of code written in C++ which was submitted to
 * flipcode.com by John W. Ratcliff  // July 22, 2000
 * See original code and more information here:
 * http://www.flipcode.com/archives/Efficient_Polygon_Triangulation.shtml
 *
 * ported to actionscript by Zevan Rosser
 * www.actionsnippet.com
 *
 * ported to javascript by Joshua Koo
 * http://www.lab4games.net/zz85/blog
 *
 */


( function( namespace ) {

	var EPSILON = 0.0000000001;

	// takes in an contour array and returns

	var process = function( contour, indices ) {

		var n = contour.length;

		if ( n < 3 ) return null;

		var result = [],
			verts = [],
			vertIndices = [];

		/* we want a counter-clockwise polygon in verts */

		var u, v, w;

		if ( area( contour ) > 0.0 ) {

			for ( v = 0; v < n; v++ ) verts[ v ] = v;

		} else {

			for ( v = 0; v < n; v++ ) verts[ v ] = ( n - 1 ) - v;

		}

		var nv = n;

		/*  remove nv - 2 vertices, creating 1 triangle every time */

		var count = 2 * nv;   /* error detection */

		for( v = nv - 1; nv > 2; ) {

			/* if we loop, it is probably a non-simple polygon */

			if ( ( count-- ) <= 0 ) {

				//** Triangulate: ERROR - probable bad polygon!

				//throw ( "Warning, unable to triangulate polygon!" );
				//return null;
				// Sometimes warning is fine, especially polygons are triangulated in reverse.
				console.log( "Warning, unable to triangulate polygon!" );

				if ( indices ) return vertIndices;
				return result;

			}

			/* three consecutive vertices in current polygon, <u,v,w> */

			u = v; 	 	if ( nv <= u ) u = 0;     /* previous */
			v = u + 1;  if ( nv <= v ) v = 0;     /* new v    */
			w = v + 1;  if ( nv <= w ) w = 0;     /* next     */

			if ( snip( contour, u, v, w, nv, verts ) ) {

				var a, b, c, s, t;

				/* true names of the vertices */

				a = verts[ u ];
				b = verts[ v ];
				c = verts[ w ];

				/* output Triangle */

				/*
				result.push( contour[ a ] );
				result.push( contour[ b ] );
				result.push( contour[ c ] );
				*/
				result.push( [ contour[ a ],
					contour[ b ],
					contour[ c ] ] );


				vertIndices.push( [ verts[ u ], verts[ v ], verts[ w ] ] );

				/* remove v from the remaining polygon */

				for( s = v, t = v + 1; t < nv; s++, t++ ) {

					verts[ s ] = verts[ t ];

				}

				nv--;

				/* reset error detection counter */

				count = 2 * nv;

			}

		}

		if ( indices ) return vertIndices;
		return result;

	};

	// calculate area of the contour polygon

	var area = function ( contour ) {

		var n = contour.length;
		var a = 0.0;

		for( var p = n - 1, q = 0; q < n; p = q++ ) {

			a += contour[ p ].x * contour[ q ].y - contour[ q ].x * contour[ p ].y;

		}

		return a * 0.5;

	};

	// see if p is inside triangle abc

	var insideTriangle = function( ax, ay,
								   bx, by,
								   cx, cy,
								   px, py ) {

		  var aX, aY, bX, bY;
		  var cX, cY, apx, apy;
		  var bpx, bpy, cpx, cpy;
		  var cCROSSap, bCROSScp, aCROSSbp;

		  aX = cx - bx;  aY = cy - by;
		  bX = ax - cx;  bY = ay - cy;
		  cX = bx - ax;  cY = by - ay;
		  apx= px  -ax;  apy= py - ay;
		  bpx= px - bx;  bpy= py - by;
		  cpx= px - cx;  cpy= py - cy;

		  aCROSSbp = aX*bpy - aY*bpx;
		  cCROSSap = cX*apy - cY*apx;
		  bCROSScp = bX*cpy - bY*cpx;

		  return ( (aCROSSbp >= 0.0) && (bCROSScp >= 0.0) && (cCROSSap >= 0.0) );

	};


	var snip = function ( contour, u, v, w, n, verts ) {

		var p;
		var ax, ay, bx, by;
		var cx, cy, px, py;

		ax = contour[ verts[ u ] ].x;
		ay = contour[ verts[ u ] ].y;

		bx = contour[ verts[ v ] ].x;
		by = contour[ verts[ v ] ].y;

		cx = contour[ verts[ w ] ].x;
		cy = contour[ verts[ w ] ].y;

		if ( EPSILON > (((bx-ax)*(cy-ay)) - ((by-ay)*(cx-ax))) ) return false;

			for ( p = 0; p < n; p++ ) {

				if( (p == u) || (p == v) || (p == w) ) continue;

				px = contour[ verts[ p ] ].x
				py = contour[ verts[ p ] ].y

				if ( insideTriangle( ax, ay, bx, by, cx, cy, px, py ) ) return false;

		  }

		  return true;

	};


	namespace.Triangulate = process;
	namespace.Triangulate.area = area;

	return namespace;

})(THREE.FontUtils);

// To use the typeface.js face files, hook up the API
self._typeface_js = { faces: THREE.FontUtils.faces, loadFace: THREE.FontUtils.loadFace };/**
 * @author zz85 / http://www.lab4games.net/zz85/blog
 * Extensible curve object
 *
 * Some common of Curve methods
 * .getPoint(t), getTangent(t)
 * .getPointAt(u), getTagentAt(u)
 * .getPoints(), .getSpacedPoints()
 * .getLength()
 * .updateArcLengths()
 *
 * This file contains following classes:
 *
 * -- 2d classes --
 * THREE.Curve
 * THREE.LineCurve
 * THREE.QuadraticBezierCurve
 * THREE.CubicBezierCurve
 * THREE.SplineCurve
 * THREE.ArcCurve
 * THREE.EllipseCurve
 *
 * -- 3d classes --
 * THREE.LineCurve3
 * THREE.QuadraticBezierCurve3
 * THREE.CubicBezierCurve3
 * THREE.SplineCurve3
 * THREE.ClosedSplineCurve3
 *
 * A series of curves can be represented as a THREE.CurvePath
 *
 **/

/**************************************************************
 *	Abstract Curve base class
 **************************************************************/

THREE.Curve = function () {

};

// Virtual base class method to overwrite and implement in subclasses
//	- t [0 .. 1]

THREE.Curve.prototype.getPoint = function ( t ) {

	console.log( "Warning, getPoint() not implemented!" );
	return null;

};

// Get point at relative position in curve according to arc length
// - u [0 .. 1]

THREE.Curve.prototype.getPointAt = function ( u ) {

	var t = this.getUtoTmapping( u );
	return this.getPoint( t );

};

// Get sequence of points using getPoint( t )

THREE.Curve.prototype.getPoints = function ( divisions ) {

	if ( !divisions ) divisions = 5;

	var d, pts = [];

	for ( d = 0; d <= divisions; d ++ ) {

		pts.push( this.getPoint( d / divisions ) );

	}

	return pts;

};

// Get sequence of points using getPointAt( u )

THREE.Curve.prototype.getSpacedPoints = function ( divisions ) {

	if ( !divisions ) divisions = 5;

	var d, pts = [];

	for ( d = 0; d <= divisions; d ++ ) {

		pts.push( this.getPointAt( d / divisions ) );

	}

	return pts;

};

// Get total curve arc length

THREE.Curve.prototype.getLength = function () {

	var lengths = this.getLengths();
	return lengths[ lengths.length - 1 ];

};

// Get list of cumulative segment lengths

THREE.Curve.prototype.getLengths = function ( divisions ) {

	if ( !divisions ) divisions = (this.__arcLengthDivisions) ? (this.__arcLengthDivisions): 200;

	if ( this.cacheArcLengths
		&& ( this.cacheArcLengths.length == divisions + 1 )
		&& !this.needsUpdate) {

		//console.log( "cached", this.cacheArcLengths );
		return this.cacheArcLengths;

	}

	this.needsUpdate = false;

	var cache = [];
	var current, last = this.getPoint( 0 );
	var p, sum = 0;

	cache.push( 0 );

	for ( p = 1; p <= divisions; p ++ ) {

		current = this.getPoint ( p / divisions );
		sum += current.distanceTo( last );
		cache.push( sum );
		last = current;

	}

	this.cacheArcLengths = cache;

	return cache; // { sums: cache, sum:sum }; Sum is in the last element.

};


THREE.Curve.prototype.updateArcLengths = function() {
	this.needsUpdate = true;
	this.getLengths();
};

// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equi distance

THREE.Curve.prototype.getUtoTmapping = function ( u, distance ) {

	var arcLengths = this.getLengths();

	var i = 0, il = arcLengths.length;

	var targetArcLength; // The targeted u distance value to get

	if ( distance ) {

		targetArcLength = distance;

	} else {

		targetArcLength = u * arcLengths[ il - 1 ];

	}

	//var time = Date.now();

	// binary search for the index with largest value smaller than target u distance

	var low = 0, high = il - 1, comparison;

	while ( low <= high ) {

		i = Math.floor( low + ( high - low ) / 2 ); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats

		comparison = arcLengths[ i ] - targetArcLength;

		if ( comparison < 0 ) {

			low = i + 1;
			continue;

		} else if ( comparison > 0 ) {

			high = i - 1;
			continue;

		} else {

			high = i;
			break;

			// DONE

		}

	}

	i = high;

	//console.log('b' , i, low, high, Date.now()- time);

	if ( arcLengths[ i ] == targetArcLength ) {

		var t = i / ( il - 1 );
		return t;

	}

	// we could get finer grain at lengths, or use simple interpolatation between two points

	var lengthBefore = arcLengths[ i ];
    var lengthAfter = arcLengths[ i + 1 ];

    var segmentLength = lengthAfter - lengthBefore;

    // determine where we are between the 'before' and 'after' points

    var segmentFraction = ( targetArcLength - lengthBefore ) / segmentLength;

    // add that fractional amount to t

    var t = ( i + segmentFraction ) / ( il -1 );

	return t;

};


// In 2D space, there are actually 2 normal vectors,
// and in 3D space, infinte
// TODO this should be depreciated.
THREE.Curve.prototype.getNormalVector = function( t ) {

	var vec = this.getTangent( t );

	return new THREE.Vector2( -vec.y , vec.x );

};

// Returns a unit vector tangent at t
// In case any sub curve does not implement its tangent / normal finding,
// we get 2 points with a small delta and find a gradient of the 2 points
// which seems to make a reasonable approximation

THREE.Curve.prototype.getTangent = function( t ) {

	var delta = 0.0001;
	var t1 = t - delta;
	var t2 = t + delta;

	// Capping in case of danger

	if ( t1 < 0 ) t1 = 0;
	if ( t2 > 1 ) t2 = 1;

	var pt1 = this.getPoint( t1 );
	var pt2 = this.getPoint( t2 );

	var vec = pt2.clone().subSelf(pt1);
	return vec.normalize();

};


THREE.Curve.prototype.getTangentAt = function ( u ) {

	var t = this.getUtoTmapping( u );
	return this.getTangent( t );

};

/**************************************************************
 *	Line
 **************************************************************/

THREE.LineCurve = function ( v1, v2 ) {

	this.v1 = v1;
	this.v2 = v2;

};

THREE.LineCurve.prototype = Object.create( THREE.Curve.prototype );

THREE.LineCurve.prototype.getPoint = function ( t ) {

	var point = this.v2.clone().subSelf(this.v1);
	point.multiplyScalar( t ).addSelf( this.v1 );

	return point;

};

// Line curve is linear, so we can overwrite default getPointAt

THREE.LineCurve.prototype.getPointAt = function ( u ) {

	return this.getPoint( u );

};

THREE.LineCurve.prototype.getTangent = function( t ) {

	var tangent = this.v2.clone().subSelf(this.v1);

	return tangent.normalize();

};

/**************************************************************
 *	Quadratic Bezier curve
 **************************************************************/


THREE.QuadraticBezierCurve = function ( v0, v1, v2 ) {

	this.v0 = v0;
	this.v1 = v1;
	this.v2 = v2;

};

THREE.QuadraticBezierCurve.prototype = Object.create( THREE.Curve.prototype );


THREE.QuadraticBezierCurve.prototype.getPoint = function ( t ) {

	var tx, ty;

	tx = THREE.Shape.Utils.b2( t, this.v0.x, this.v1.x, this.v2.x );
	ty = THREE.Shape.Utils.b2( t, this.v0.y, this.v1.y, this.v2.y );

	return new THREE.Vector2( tx, ty );

};


THREE.QuadraticBezierCurve.prototype.getTangent = function( t ) {

	var tx, ty;

	tx = THREE.Curve.Utils.tangentQuadraticBezier( t, this.v0.x, this.v1.x, this.v2.x );
	ty = THREE.Curve.Utils.tangentQuadraticBezier( t, this.v0.y, this.v1.y, this.v2.y );

	// returns unit vector

	var tangent = new THREE.Vector2( tx, ty );
	tangent.normalize();

	return tangent;

};


/**************************************************************
 *	Cubic Bezier curve
 **************************************************************/

THREE.CubicBezierCurve = function ( v0, v1, v2, v3 ) {

	this.v0 = v0;
	this.v1 = v1;
	this.v2 = v2;
	this.v3 = v3;

};

THREE.CubicBezierCurve.prototype = Object.create( THREE.Curve.prototype );

THREE.CubicBezierCurve.prototype.getPoint = function ( t ) {

	var tx, ty;

	tx = THREE.Shape.Utils.b3( t, this.v0.x, this.v1.x, this.v2.x, this.v3.x );
	ty = THREE.Shape.Utils.b3( t, this.v0.y, this.v1.y, this.v2.y, this.v3.y );

	return new THREE.Vector2( tx, ty );

};

THREE.CubicBezierCurve.prototype.getTangent = function( t ) {

	var tx, ty;

	tx = THREE.Curve.Utils.tangentCubicBezier( t, this.v0.x, this.v1.x, this.v2.x, this.v3.x );
	ty = THREE.Curve.Utils.tangentCubicBezier( t, this.v0.y, this.v1.y, this.v2.y, this.v3.y );

	var tangent = new THREE.Vector2( tx, ty );
	tangent.normalize();

	return tangent;

};


/**************************************************************
 *	Spline curve
 **************************************************************/

THREE.SplineCurve = function ( points /* array of Vector2 */ ) {

	this.points = (points == undefined) ? [] : points;

};

THREE.SplineCurve.prototype = Object.create( THREE.Curve.prototype );

THREE.SplineCurve.prototype.getPoint = function ( t ) {

	var v = new THREE.Vector2();
	var c = [];
	var points = this.points, point, intPoint, weight;
	point = ( points.length - 1 ) * t;

	intPoint = Math.floor( point );
	weight = point - intPoint;

	c[ 0 ] = intPoint == 0 ? intPoint : intPoint - 1;
	c[ 1 ] = intPoint;
	c[ 2 ] = intPoint  > points.length - 2 ? points.length -1 : intPoint + 1;
	c[ 3 ] = intPoint  > points.length - 3 ? points.length -1 : intPoint + 2;

	v.x = THREE.Curve.Utils.interpolate( points[ c[ 0 ] ].x, points[ c[ 1 ] ].x, points[ c[ 2 ] ].x, points[ c[ 3 ] ].x, weight );
	v.y = THREE.Curve.Utils.interpolate( points[ c[ 0 ] ].y, points[ c[ 1 ] ].y, points[ c[ 2 ] ].y, points[ c[ 3 ] ].y, weight );

	return v;

};

/**************************************************************
 *	Ellipse curve
 **************************************************************/

THREE.EllipseCurve = function ( aX, aY, xRadius, yRadius,
							aStartAngle, aEndAngle,
							aClockwise ) {

	this.aX = aX;
	this.aY = aY;

	this.xRadius = xRadius;
	this.yRadius = yRadius;

	this.aStartAngle = aStartAngle;
	this.aEndAngle = aEndAngle;

	this.aClockwise = aClockwise;

};

THREE.EllipseCurve.prototype = Object.create( THREE.Curve.prototype );

THREE.EllipseCurve.prototype.getPoint = function ( t ) {

	var deltaAngle = this.aEndAngle - this.aStartAngle;

	if ( !this.aClockwise ) {

		t = 1 - t;

	}

	var angle = this.aStartAngle + t * deltaAngle;

	var tx = this.aX + this.xRadius * Math.cos( angle );
	var ty = this.aY + this.yRadius * Math.sin( angle );

	return new THREE.Vector2( tx, ty );

};

/**************************************************************
 *	Arc curve
 **************************************************************/

THREE.ArcCurve = function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

	THREE.EllipseCurve.call( this, aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );
};

THREE.ArcCurve.prototype = Object.create( THREE.EllipseCurve.prototype );


/**************************************************************
 *	Utils
 **************************************************************/

THREE.Curve.Utils = {

	tangentQuadraticBezier: function ( t, p0, p1, p2 ) {

		return 2 * ( 1 - t ) * ( p1 - p0 ) + 2 * t * ( p2 - p1 );

	},

	// Puay Bing, thanks for helping with this derivative!

	tangentCubicBezier: function (t, p0, p1, p2, p3 ) {

		return -3 * p0 * (1 - t) * (1 - t)  +
			3 * p1 * (1 - t) * (1-t) - 6 *t *p1 * (1-t) +
			6 * t *  p2 * (1-t) - 3 * t * t * p2 +
			3 * t * t * p3;
	},


	tangentSpline: function ( t, p0, p1, p2, p3 ) {

		// To check if my formulas are correct

		var h00 = 6 * t * t - 6 * t; 	// derived from 2t^3 − 3t^2 + 1
		var h10 = 3 * t * t - 4 * t + 1; // t^3 − 2t^2 + t
		var h01 = -6 * t * t + 6 * t; 	// − 2t3 + 3t2
		var h11 = 3 * t * t - 2 * t;	// t3 − t2

		return h00 + h10 + h01 + h11;

	},

	// Catmull-Rom

	interpolate: function( p0, p1, p2, p3, t ) {

		var v0 = ( p2 - p0 ) * 0.5;
		var v1 = ( p3 - p1 ) * 0.5;
		var t2 = t * t;
		var t3 = t * t2;
		return ( 2 * p1 - 2 * p2 + v0 + v1 ) * t3 + ( - 3 * p1 + 3 * p2 - 2 * v0 - v1 ) * t2 + v0 * t + p1;

	}

};


// TODO: Transformation for Curves?

/**************************************************************
 *	3D Curves
 **************************************************************/

// A Factory method for creating new curve subclasses

THREE.Curve.create = function ( constructor, getPointFunc ) {

	constructor.prototype = Object.create( THREE.Curve.prototype );
	constructor.prototype.getPoint = getPointFunc;

	return constructor;

};


/**************************************************************
 *	Line3D
 **************************************************************/

THREE.LineCurve3 = THREE.Curve.create(

	function ( v1, v2 ) {

		this.v1 = v1;
		this.v2 = v2;

	},

	function ( t ) {

		var r = new THREE.Vector3();


		r.sub( this.v2, this.v1 ); // diff
		r.multiplyScalar( t );
		r.addSelf( this.v1 );

		return r;

	}

);


/**************************************************************
 *	Quadratic Bezier 3D curve
 **************************************************************/

THREE.QuadraticBezierCurve3 = THREE.Curve.create(

	function ( v0, v1, v2 ) {

		this.v0 = v0;
		this.v1 = v1;
		this.v2 = v2;

	},

	function ( t ) {

		var tx, ty, tz;

		tx = THREE.Shape.Utils.b2( t, this.v0.x, this.v1.x, this.v2.x );
		ty = THREE.Shape.Utils.b2( t, this.v0.y, this.v1.y, this.v2.y );
		tz = THREE.Shape.Utils.b2( t, this.v0.z, this.v1.z, this.v2.z );

		return new THREE.Vector3( tx, ty, tz );

	}

);



/**************************************************************
 *	Cubic Bezier 3D curve
 **************************************************************/

THREE.CubicBezierCurve3 = THREE.Curve.create(

	function ( v0, v1, v2, v3 ) {

		this.v0 = v0;
		this.v1 = v1;
		this.v2 = v2;
		this.v3 = v3;

	},

	function ( t ) {

		var tx, ty, tz;

		tx = THREE.Shape.Utils.b3( t, this.v0.x, this.v1.x, this.v2.x, this.v3.x );
		ty = THREE.Shape.Utils.b3( t, this.v0.y, this.v1.y, this.v2.y, this.v3.y );
		tz = THREE.Shape.Utils.b3( t, this.v0.z, this.v1.z, this.v2.z, this.v3.z );

		return new THREE.Vector3( tx, ty, tz );

	}

);



/**************************************************************
 *	Spline 3D curve
 **************************************************************/


THREE.SplineCurve3 = THREE.Curve.create(

	function ( points /* array of Vector3 */) {

		this.points = (points == undefined) ? [] : points;

	},

	function ( t ) {

		var v = new THREE.Vector3();
		var c = [];
		var points = this.points, point, intPoint, weight;
		point = ( points.length - 1 ) * t;

		intPoint = Math.floor( point );
		weight = point - intPoint;

		c[ 0 ] = intPoint == 0 ? intPoint : intPoint - 1;
		c[ 1 ] = intPoint;
		c[ 2 ] = intPoint  > points.length - 2 ? points.length - 1 : intPoint + 1;
		c[ 3 ] = intPoint  > points.length - 3 ? points.length - 1 : intPoint + 2;

		var pt0 = points[ c[0] ],
			pt1 = points[ c[1] ],
			pt2 = points[ c[2] ],
			pt3 = points[ c[3] ];

		v.x = THREE.Curve.Utils.interpolate(pt0.x, pt1.x, pt2.x, pt3.x, weight);
		v.y = THREE.Curve.Utils.interpolate(pt0.y, pt1.y, pt2.y, pt3.y, weight);
		v.z = THREE.Curve.Utils.interpolate(pt0.z, pt1.z, pt2.z, pt3.z, weight);

		return v;

	}

);


// THREE.SplineCurve3.prototype.getTangent = function(t) {
// 		var v = new THREE.Vector3();
// 		var c = [];
// 		var points = this.points, point, intPoint, weight;
// 		point = ( points.length - 1 ) * t;

// 		intPoint = Math.floor( point );
// 		weight = point - intPoint;

// 		c[ 0 ] = intPoint == 0 ? intPoint : intPoint - 1;
// 		c[ 1 ] = intPoint;
// 		c[ 2 ] = intPoint  > points.length - 2 ? points.length - 1 : intPoint + 1;
// 		c[ 3 ] = intPoint  > points.length - 3 ? points.length - 1 : intPoint + 2;

// 		var pt0 = points[ c[0] ],
// 			pt1 = points[ c[1] ],
// 			pt2 = points[ c[2] ],
// 			pt3 = points[ c[3] ];

// 	// t = weight;
// 	v.x = THREE.Curve.Utils.tangentSpline( t, pt0.x, pt1.x, pt2.x, pt3.x );
// 	v.y = THREE.Curve.Utils.tangentSpline( t, pt0.y, pt1.y, pt2.y, pt3.y );
// 	v.z = THREE.Curve.Utils.tangentSpline( t, pt0.z, pt1.z, pt2.z, pt3.z );

// 	return v;

// }

/**************************************************************
 *	Closed Spline 3D curve
 **************************************************************/


THREE.ClosedSplineCurve3 = THREE.Curve.create(

	function ( points /* array of Vector3 */) {

		this.points = (points == undefined) ? [] : points;

	},

    function ( t ) {

        var v = new THREE.Vector3();
        var c = [];
        var points = this.points, point, intPoint, weight;
        point = ( points.length - 0 ) * t;
            // This needs to be from 0-length +1

        intPoint = Math.floor( point );
        weight = point - intPoint;

        intPoint += intPoint > 0 ? 0 : ( Math.floor( Math.abs( intPoint ) / points.length ) + 1 ) * points.length;
        c[ 0 ] = ( intPoint - 1 ) % points.length;
        c[ 1 ] = ( intPoint ) % points.length;
        c[ 2 ] = ( intPoint + 1 ) % points.length;
        c[ 3 ] = ( intPoint + 2 ) % points.length;

        v.x = THREE.Curve.Utils.interpolate( points[ c[ 0 ] ].x, points[ c[ 1 ] ].x, points[ c[ 2 ] ].x, points[ c[ 3 ] ].x, weight );
        v.y = THREE.Curve.Utils.interpolate( points[ c[ 0 ] ].y, points[ c[ 1 ] ].y, points[ c[ 2 ] ].y, points[ c[ 3 ] ].y, weight );
        v.z = THREE.Curve.Utils.interpolate( points[ c[ 0 ] ].z, points[ c[ 1 ] ].z, points[ c[ 2 ] ].z, points[ c[ 3 ] ].z, weight );

        return v;

    }

);
/**
 * @author zz85 / http://www.lab4games.net/zz85/blog
 *
 **/

/**************************************************************
 *	Curved Path - a curve path is simply a array of connected
 *  curves, but retains the api of a curve
 **************************************************************/

THREE.CurvePath = function () {

	this.curves = [];
	this.bends = [];

	this.autoClose = false; // Automatically closes the path
};

THREE.CurvePath.prototype = Object.create( THREE.Curve.prototype );

THREE.CurvePath.prototype.add = function ( curve ) {

	this.curves.push( curve );

};

THREE.CurvePath.prototype.checkConnection = function() {
	// TODO
	// If the ending of curve is not connected to the starting
	// or the next curve, then, this is not a real path
};

THREE.CurvePath.prototype.closePath = function() {
	// TODO Test
	// and verify for vector3 (needs to implement equals)
	// Add a line curve if start and end of lines are not connected
	var startPoint = this.curves[0].getPoint(0);
	var endPoint = this.curves[this.curves.length-1].getPoint(1);

	if (!startPoint.equals(endPoint)) {
		this.curves.push( new THREE.LineCurve(endPoint, startPoint) );
	}

};

// To get accurate point with reference to
// entire path distance at time t,
// following has to be done:

// 1. Length of each sub path have to be known
// 2. Locate and identify type of curve
// 3. Get t for the curve
// 4. Return curve.getPointAt(t')

THREE.CurvePath.prototype.getPoint = function( t ) {

	var d = t * this.getLength();
	var curveLengths = this.getCurveLengths();
	var i = 0, diff, curve;

	// To think about boundaries points.

	while ( i < curveLengths.length ) {

		if ( curveLengths[ i ] >= d ) {

			diff = curveLengths[ i ] - d;
			curve = this.curves[ i ];

			var u = 1 - diff / curve.getLength();

			return curve.getPointAt( u );

			break;
		}

		i ++;

	}

	return null;

	// loop where sum != 0, sum > d , sum+1 <d

};

/*
THREE.CurvePath.prototype.getTangent = function( t ) {
};*/


// We cannot use the default THREE.Curve getPoint() with getLength() because in
// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath
// getPoint() depends on getLength

THREE.CurvePath.prototype.getLength = function() {

	var lens = this.getCurveLengths();
	return lens[ lens.length - 1 ];

};

// Compute lengths and cache them
// We cannot overwrite getLengths() because UtoT mapping uses it.

THREE.CurvePath.prototype.getCurveLengths = function() {

	// We use cache values if curves and cache array are same length

	if ( this.cacheLengths && this.cacheLengths.length == this.curves.length ) {

		return this.cacheLengths;

	};

	// Get length of subsurve
	// Push sums into cached array

	var lengths = [], sums = 0;
	var i, il = this.curves.length;

	for ( i = 0; i < il; i ++ ) {

		sums += this.curves[ i ].getLength();
		lengths.push( sums );

	}

	this.cacheLengths = lengths;

	return lengths;

};



// Returns min and max coordinates, as well as centroid

THREE.CurvePath.prototype.getBoundingBox = function () {

	var points = this.getPoints();

	var maxX, maxY, maxZ;
	var minX, minY, minZ;

	maxX = maxY = Number.NEGATIVE_INFINITY;
	minX = minY = Number.POSITIVE_INFINITY;

	var p, i, il, sum;

	var v3 = points[0] instanceof THREE.Vector3;

	sum = v3 ? new THREE.Vector3() : new THREE.Vector2();

	for ( i = 0, il = points.length; i < il; i ++ ) {

		p = points[ i ];

		if ( p.x > maxX ) maxX = p.x;
		else if ( p.x < minX ) minX = p.x;

		if ( p.y > maxY ) maxY = p.y;
		else if ( p.y < minY ) minY = p.y;

		if (v3) {

			if ( p.z > maxZ ) maxZ = p.z;
			else if ( p.z < minZ ) minZ = p.z;

		}

		sum.addSelf( p );

	}

	var ret = {

		minX: minX,
		minY: minY,
		maxX: maxX,
		maxY: maxY,
		centroid: sum.divideScalar( il )

	};

	if (v3) {

		ret.maxZ = maxZ;
		ret.minZ = minZ;

	}

	return ret;

};

/**************************************************************
 *	Create Geometries Helpers
 **************************************************************/

/// Generate geometry from path points (for Line or ParticleSystem objects)

THREE.CurvePath.prototype.createPointsGeometry = function( divisions ) {

	var pts = this.getPoints( divisions, true );
	return this.createGeometry( pts );

};

// Generate geometry from equidistance sampling along the path

THREE.CurvePath.prototype.createSpacedPointsGeometry = function( divisions ) {

	var pts = this.getSpacedPoints( divisions, true );
	return this.createGeometry( pts );

};

THREE.CurvePath.prototype.createGeometry = function( points ) {

	var geometry = new THREE.Geometry();

	for ( var i = 0; i < points.length; i ++ ) {

		geometry.vertices.push( new THREE.Vector3( points[ i ].x, points[ i ].y, points[ i ].z || 0) );

	}

	return geometry;

};


/**************************************************************
 *	Bend / Wrap Helper Methods
 **************************************************************/

// Wrap path / Bend modifiers?

THREE.CurvePath.prototype.addWrapPath = function ( bendpath ) {

	this.bends.push( bendpath );

};

THREE.CurvePath.prototype.getTransformedPoints = function( segments, bends ) {

	var oldPts = this.getPoints( segments ); // getPoints getSpacedPoints
	var i, il;

	if ( !bends ) {

		bends = this.bends;

	}

	for ( i = 0, il = bends.length; i < il; i ++ ) {

		oldPts = this.getWrapPoints( oldPts, bends[ i ] );

	}

	return oldPts;

};

THREE.CurvePath.prototype.getTransformedSpacedPoints = function( segments, bends ) {

	var oldPts = this.getSpacedPoints( segments );

	var i, il;

	if ( !bends ) {

		bends = this.bends;

	}

	for ( i = 0, il = bends.length; i < il; i ++ ) {

		oldPts = this.getWrapPoints( oldPts, bends[ i ] );

	}

	return oldPts;

};

// This returns getPoints() bend/wrapped around the contour of a path.
// Read http://www.planetclegg.com/projects/WarpingTextToSplines.html

THREE.CurvePath.prototype.getWrapPoints = function ( oldPts, path ) {

	var bounds = this.getBoundingBox();

	var i, il, p, oldX, oldY, xNorm;

	for ( i = 0, il = oldPts.length; i < il; i ++ ) {

		p = oldPts[ i ];

		oldX = p.x;
		oldY = p.y;

		xNorm = oldX / bounds.maxX;

		// If using actual distance, for length > path, requires line extrusions
		//xNorm = path.getUtoTmapping(xNorm, oldX); // 3 styles. 1) wrap stretched. 2) wrap stretch by arc length 3) warp by actual distance

		xNorm = path.getUtoTmapping( xNorm, oldX );

		// check for out of bounds?

		var pathPt = path.getPoint( xNorm );
		var normal = path.getNormalVector( xNorm ).multiplyScalar( oldY );

		p.x = pathPt.x + normal.x;
		p.y = pathPt.y + normal.y;

	}

	return oldPts;

};

/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Gyroscope = function () {

	THREE.Object3D.call( this );

};

THREE.Gyroscope.prototype = Object.create( THREE.Object3D.prototype );

THREE.Gyroscope.prototype.updateMatrixWorld = function ( force ) {

	this.matrixAutoUpdate && this.updateMatrix();

	// update matrixWorld

	if ( this.matrixWorldNeedsUpdate || force ) {

		if ( this.parent ) {

			this.matrixWorld.multiply( this.parent.matrixWorld, this.matrix );

			this.matrixWorld.decompose( this.translationWorld, this.rotationWorld, this.scaleWorld );
			this.matrix.decompose( this.translationObject, this.rotationObject, this.scaleObject );

			this.matrixWorld.compose( this.translationWorld, this.rotationObject, this.scaleWorld );


		} else {

			this.matrixWorld.copy( this.matrix );

		}


		this.matrixWorldNeedsUpdate = false;

		force = true;

	}

	// update children

	for ( var i = 0, l = this.children.length; i < l; i ++ ) {

		this.children[ i ].updateMatrixWorld( force );

	}

};

THREE.Gyroscope.prototype.translationWorld = new THREE.Vector3();
THREE.Gyroscope.prototype.translationObject = new THREE.Vector3();
THREE.Gyroscope.prototype.rotationWorld = new THREE.Quaternion();
THREE.Gyroscope.prototype.rotationObject = new THREE.Quaternion();
THREE.Gyroscope.prototype.scaleWorld = new THREE.Vector3();
THREE.Gyroscope.prototype.scaleObject = new THREE.Vector3();

/**
 * @author zz85 / http://www.lab4games.net/zz85/blog
 * Creates free form 2d path using series of points, lines or curves.
 *
 **/

THREE.Path = function ( points ) {

	THREE.CurvePath.call(this);

	this.actions = [];

	if ( points ) {

		this.fromPoints( points );

	}

};

THREE.Path.prototype = Object.create( THREE.CurvePath.prototype );

THREE.PathActions = {

	MOVE_TO: 'moveTo',
	LINE_TO: 'lineTo',
	QUADRATIC_CURVE_TO: 'quadraticCurveTo', // Bezier quadratic curve
	BEZIER_CURVE_TO: 'bezierCurveTo', 		// Bezier cubic curve
	CSPLINE_THRU: 'splineThru',				// Catmull-rom spline
	ARC: 'arc',								// Circle
	ELLIPSE: 'ellipse'
};

// TODO Clean up PATH API

// Create path using straight lines to connect all points
// - vectors: array of Vector2

THREE.Path.prototype.fromPoints = function ( vectors ) {

	this.moveTo( vectors[ 0 ].x, vectors[ 0 ].y );

	for ( var v = 1, vlen = vectors.length; v < vlen; v ++ ) {

		this.lineTo( vectors[ v ].x, vectors[ v ].y );

	};

};

// startPath() endPath()?

THREE.Path.prototype.moveTo = function ( x, y ) {

	var args = Array.prototype.slice.call( arguments );
	this.actions.push( { action: THREE.PathActions.MOVE_TO, args: args } );

};

THREE.Path.prototype.lineTo = function ( x, y ) {

	var args = Array.prototype.slice.call( arguments );

	var lastargs = this.actions[ this.actions.length - 1 ].args;

	var x0 = lastargs[ lastargs.length - 2 ];
	var y0 = lastargs[ lastargs.length - 1 ];

	var curve = new THREE.LineCurve( new THREE.Vector2( x0, y0 ), new THREE.Vector2( x, y ) );
	this.curves.push( curve );

	this.actions.push( { action: THREE.PathActions.LINE_TO, args: args } );

};

THREE.Path.prototype.quadraticCurveTo = function( aCPx, aCPy, aX, aY ) {

	var args = Array.prototype.slice.call( arguments );

	var lastargs = this.actions[ this.actions.length - 1 ].args;

	var x0 = lastargs[ lastargs.length - 2 ];
	var y0 = lastargs[ lastargs.length - 1 ];

	var curve = new THREE.QuadraticBezierCurve( new THREE.Vector2( x0, y0 ),
												new THREE.Vector2( aCPx, aCPy ),
												new THREE.Vector2( aX, aY ) );
	this.curves.push( curve );

	this.actions.push( { action: THREE.PathActions.QUADRATIC_CURVE_TO, args: args } );

};

THREE.Path.prototype.bezierCurveTo = function( aCP1x, aCP1y,
                                               aCP2x, aCP2y,
                                               aX, aY ) {

	var args = Array.prototype.slice.call( arguments );

	var lastargs = this.actions[ this.actions.length - 1 ].args;

	var x0 = lastargs[ lastargs.length - 2 ];
	var y0 = lastargs[ lastargs.length - 1 ];

	var curve = new THREE.CubicBezierCurve( new THREE.Vector2( x0, y0 ),
											new THREE.Vector2( aCP1x, aCP1y ),
											new THREE.Vector2( aCP2x, aCP2y ),
											new THREE.Vector2( aX, aY ) );
	this.curves.push( curve );

	this.actions.push( { action: THREE.PathActions.BEZIER_CURVE_TO, args: args } );

};

THREE.Path.prototype.splineThru = function( pts /*Array of Vector*/ ) {

	var args = Array.prototype.slice.call( arguments );
	var lastargs = this.actions[ this.actions.length - 1 ].args;

	var x0 = lastargs[ lastargs.length - 2 ];
	var y0 = lastargs[ lastargs.length - 1 ];
//---
	var npts = [ new THREE.Vector2( x0, y0 ) ];
	Array.prototype.push.apply( npts, pts );

	var curve = new THREE.SplineCurve( npts );
	this.curves.push( curve );

	this.actions.push( { action: THREE.PathActions.CSPLINE_THRU, args: args } );

};

// FUTURE: Change the API or follow canvas API?

THREE.Path.prototype.arc = function ( aX, aY, aRadius,
									  aStartAngle, aEndAngle, aClockwise ) {

	var lastargs = this.actions[ this.actions.length - 1].args;
	var x0 = lastargs[ lastargs.length - 2 ];
	var y0 = lastargs[ lastargs.length - 1 ];

	this.absarc(aX + x0, aY + y0, aRadius,
		aStartAngle, aEndAngle, aClockwise );

 };

 THREE.Path.prototype.absarc = function ( aX, aY, aRadius,
									  aStartAngle, aEndAngle, aClockwise ) {
	this.absellipse(aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);
 };

THREE.Path.prototype.ellipse = function ( aX, aY, xRadius, yRadius,
									  aStartAngle, aEndAngle, aClockwise ) {

	var lastargs = this.actions[ this.actions.length - 1].args;
	var x0 = lastargs[ lastargs.length - 2 ];
	var y0 = lastargs[ lastargs.length - 1 ];

	this.absellipse(aX + x0, aY + y0, xRadius, yRadius,
		aStartAngle, aEndAngle, aClockwise );

 };


THREE.Path.prototype.absellipse = function ( aX, aY, xRadius, yRadius,
									  aStartAngle, aEndAngle, aClockwise ) {

	var args = Array.prototype.slice.call( arguments );
	var curve = new THREE.EllipseCurve( aX, aY, xRadius, yRadius,
									aStartAngle, aEndAngle, aClockwise );
	this.curves.push( curve );

	var lastPoint = curve.getPoint(aClockwise ? 1 : 0);
	args.push(lastPoint.x);
	args.push(lastPoint.y);

	this.actions.push( { action: THREE.PathActions.ELLIPSE, args: args } );

 };

THREE.Path.prototype.getSpacedPoints = function ( divisions, closedPath ) {

	if ( ! divisions ) divisions = 40;

	var points = [];

	for ( var i = 0; i < divisions; i ++ ) {

		points.push( this.getPoint( i / divisions ) );

		//if( !this.getPoint( i / divisions ) ) throw "DIE";

	}

	// if ( closedPath ) {
	//
	// 	points.push( points[ 0 ] );
	//
	// }

	return points;

};

/* Return an array of vectors based on contour of the path */

THREE.Path.prototype.getPoints = function( divisions, closedPath ) {

	if (this.useSpacedPoints) {
		console.log('tata');
		return this.getSpacedPoints( divisions, closedPath );
	}

	divisions = divisions || 12;

	var points = [];

	var i, il, item, action, args;
	var cpx, cpy, cpx2, cpy2, cpx1, cpy1, cpx0, cpy0,
		laste, j,
		t, tx, ty;

	for ( i = 0, il = this.actions.length; i < il; i ++ ) {

		item = this.actions[ i ];

		action = item.action;
		args = item.args;

		switch( action ) {

		case THREE.PathActions.MOVE_TO:

			points.push( new THREE.Vector2( args[ 0 ], args[ 1 ] ) );

			break;

		case THREE.PathActions.LINE_TO:

			points.push( new THREE.Vector2( args[ 0 ], args[ 1 ] ) );

			break;

		case THREE.PathActions.QUADRATIC_CURVE_TO:

			cpx  = args[ 2 ];
			cpy  = args[ 3 ];

			cpx1 = args[ 0 ];
			cpy1 = args[ 1 ];

			if ( points.length > 0 ) {

				laste = points[ points.length - 1 ];

				cpx0 = laste.x;
				cpy0 = laste.y;

			} else {

				laste = this.actions[ i - 1 ].args;

				cpx0 = laste[ laste.length - 2 ];
				cpy0 = laste[ laste.length - 1 ];

			}

			for ( j = 1; j <= divisions; j ++ ) {

				t = j / divisions;

				tx = THREE.Shape.Utils.b2( t, cpx0, cpx1, cpx );
				ty = THREE.Shape.Utils.b2( t, cpy0, cpy1, cpy );

				points.push( new THREE.Vector2( tx, ty ) );

		  	}

			break;

		case THREE.PathActions.BEZIER_CURVE_TO:

			cpx  = args[ 4 ];
			cpy  = args[ 5 ];

			cpx1 = args[ 0 ];
			cpy1 = args[ 1 ];

			cpx2 = args[ 2 ];
			cpy2 = args[ 3 ];

			if ( points.length > 0 ) {

				laste = points[ points.length - 1 ];

				cpx0 = laste.x;
				cpy0 = laste.y;

			} else {

				laste = this.actions[ i - 1 ].args;

				cpx0 = laste[ laste.length - 2 ];
				cpy0 = laste[ laste.length - 1 ];

			}


			for ( j = 1; j <= divisions; j ++ ) {

				t = j / divisions;

				tx = THREE.Shape.Utils.b3( t, cpx0, cpx1, cpx2, cpx );
				ty = THREE.Shape.Utils.b3( t, cpy0, cpy1, cpy2, cpy );

				points.push( new THREE.Vector2( tx, ty ) );

			}

			break;

		case THREE.PathActions.CSPLINE_THRU:

			laste = this.actions[ i - 1 ].args;

			var last = new THREE.Vector2( laste[ laste.length - 2 ], laste[ laste.length - 1 ] );
			var spts = [ last ];

			var n = divisions * args[ 0 ].length;

			spts = spts.concat( args[ 0 ] );

			var spline = new THREE.SplineCurve( spts );

			for ( j = 1; j <= n; j ++ ) {

				points.push( spline.getPointAt( j / n ) ) ;

			}

			break;

		case THREE.PathActions.ARC:

			var aX = args[ 0 ], aY = args[ 1 ],
				aRadius = args[ 2 ],
				aStartAngle = args[ 3 ], aEndAngle = args[ 4 ],
				aClockwise = !!args[ 5 ];

			var deltaAngle = aEndAngle - aStartAngle;
			var angle;
			var tdivisions = divisions * 2;

			for ( j = 1; j <= tdivisions; j ++ ) {

				t = j / tdivisions;

				if ( ! aClockwise ) {

					t = 1 - t;

				}

				angle = aStartAngle + t * deltaAngle;

				tx = aX + aRadius * Math.cos( angle );
				ty = aY + aRadius * Math.sin( angle );

				//console.log('t', t, 'angle', angle, 'tx', tx, 'ty', ty);

				points.push( new THREE.Vector2( tx, ty ) );

			}

			//console.log(points);

		  break;

		case THREE.PathActions.ELLIPSE:

			var aX = args[ 0 ], aY = args[ 1 ],
				xRadius = args[ 2 ],
				yRadius = args[ 3 ],
				aStartAngle = args[ 4 ], aEndAngle = args[ 5 ],
				aClockwise = !!args[ 6 ];


			var deltaAngle = aEndAngle - aStartAngle;
			var angle;
			var tdivisions = divisions * 2;

			for ( j = 1; j <= tdivisions; j ++ ) {

				t = j / tdivisions;

				if ( ! aClockwise ) {

					t = 1 - t;

				}

				angle = aStartAngle + t * deltaAngle;

				tx = aX + xRadius * Math.cos( angle );
				ty = aY + yRadius * Math.sin( angle );

				//console.log('t', t, 'angle', angle, 'tx', tx, 'ty', ty);

				points.push( new THREE.Vector2( tx, ty ) );

			}

			//console.log(points);

		  break;

		} // end switch

	}



	// Normalize to remove the closing point by default.
	var lastPoint = points[ points.length - 1];
	var EPSILON = 0.0000000001;
	if ( Math.abs(lastPoint.x - points[ 0 ].x) < EPSILON &&
             Math.abs(lastPoint.y - points[ 0 ].y) < EPSILON)
		points.splice( points.length - 1, 1);
	if ( closedPath ) {

		points.push( points[ 0 ] );

	}

	return points;

};

// Breaks path into shapes

THREE.Path.prototype.toShapes = function() {

	var i, il, item, action, args;

	var subPaths = [], lastPath = new THREE.Path();

	for ( i = 0, il = this.actions.length; i < il; i ++ ) {

		item = this.actions[ i ];

		args = item.args;
		action = item.action;

		if ( action == THREE.PathActions.MOVE_TO ) {

			if ( lastPath.actions.length != 0 ) {

				subPaths.push( lastPath );
				lastPath = new THREE.Path();

			}

		}

		lastPath[ action ].apply( lastPath, args );

	}

	if ( lastPath.actions.length != 0 ) {

		subPaths.push( lastPath );

	}

	// console.log(subPaths);

	if ( subPaths.length == 0 ) return [];

	var tmpPath, tmpShape, shapes = [];

	var holesFirst = !THREE.Shape.Utils.isClockWise( subPaths[ 0 ].getPoints() );
	// console.log("Holes first", holesFirst);

	if ( subPaths.length == 1) {
		tmpPath = subPaths[0];
		tmpShape = new THREE.Shape();
		tmpShape.actions = tmpPath.actions;
		tmpShape.curves = tmpPath.curves;
		shapes.push( tmpShape );
		return shapes;
	};

	if ( holesFirst ) {

		tmpShape = new THREE.Shape();

		for ( i = 0, il = subPaths.length; i < il; i ++ ) {

			tmpPath = subPaths[ i ];

			if ( THREE.Shape.Utils.isClockWise( tmpPath.getPoints() ) ) {

				tmpShape.actions = tmpPath.actions;
				tmpShape.curves = tmpPath.curves;

				shapes.push( tmpShape );
				tmpShape = new THREE.Shape();

				//console.log('cw', i);

			} else {

				tmpShape.holes.push( tmpPath );

				//console.log('ccw', i);

			}

		}

	} else {

		// Shapes first

		for ( i = 0, il = subPaths.length; i < il; i ++ ) {

			tmpPath = subPaths[ i ];

			if ( THREE.Shape.Utils.isClockWise( tmpPath.getPoints() ) ) {


				if ( tmpShape ) shapes.push( tmpShape );

				tmpShape = new THREE.Shape();
				tmpShape.actions = tmpPath.actions;
				tmpShape.curves = tmpPath.curves;

			} else {

				tmpShape.holes.push( tmpPath );

			}

		}

		shapes.push( tmpShape );

	}

	//console.log("shape", shapes);

	return shapes;

};
/**
 * @author zz85 / http://www.lab4games.net/zz85/blog
 * Defines a 2d shape plane using paths.
 **/

// STEP 1 Create a path.
// STEP 2 Turn path into shape.
// STEP 3 ExtrudeGeometry takes in Shape/Shapes
// STEP 3a - Extract points from each shape, turn to vertices
// STEP 3b - Triangulate each shape, add faces.

THREE.Shape = function ( ) {

	THREE.Path.apply( this, arguments );
	this.holes = [];

};

THREE.Shape.prototype = Object.create( THREE.Path.prototype );

// Convenience method to return ExtrudeGeometry

THREE.Shape.prototype.extrude = function ( options ) {

	var extruded = new THREE.ExtrudeGeometry( this, options );
	return extruded;

};

// Convenience method to return ShapeGeometry

THREE.Shape.prototype.makeGeometry = function ( options ) {

	var geometry = new THREE.ShapeGeometry( this, options );
	return geometry;

};

// Get points of holes

THREE.Shape.prototype.getPointsHoles = function ( divisions ) {

	var i, il = this.holes.length, holesPts = [];

	for ( i = 0; i < il; i ++ ) {

		holesPts[ i ] = this.holes[ i ].getTransformedPoints( divisions, this.bends );

	}

	return holesPts;

};

// Get points of holes (spaced by regular distance)

THREE.Shape.prototype.getSpacedPointsHoles = function ( divisions ) {

	var i, il = this.holes.length, holesPts = [];

	for ( i = 0; i < il; i ++ ) {

		holesPts[ i ] = this.holes[ i ].getTransformedSpacedPoints( divisions, this.bends );

	}

	return holesPts;

};


// Get points of shape and holes (keypoints based on segments parameter)

THREE.Shape.prototype.extractAllPoints = function ( divisions ) {

	return {

		shape: this.getTransformedPoints( divisions ),
		holes: this.getPointsHoles( divisions )

	};

};

THREE.Shape.prototype.extractPoints = function ( divisions ) {

	if (this.useSpacedPoints) {
		return this.extractAllSpacedPoints(divisions);
	}

	return this.extractAllPoints(divisions);

};

//
// THREE.Shape.prototype.extractAllPointsWithBend = function ( divisions, bend ) {
//
// 	return {
//
// 		shape: this.transform( bend, divisions ),
// 		holes: this.getPointsHoles( divisions, bend )
//
// 	};
//
// };

// Get points of shape and holes (spaced by regular distance)

THREE.Shape.prototype.extractAllSpacedPoints = function ( divisions ) {

	return {

		shape: this.getTransformedSpacedPoints( divisions ),
		holes: this.getSpacedPointsHoles( divisions )

	};

};

/**************************************************************
 *	Utils
 **************************************************************/

THREE.Shape.Utils = {

	/*
		contour - array of vector2 for contour
		holes   - array of array of vector2
	*/

	removeHoles: function ( contour, holes ) {

		var shape = contour.concat(); // work on this shape
		var allpoints = shape.concat();

		/* For each isolated shape, find the closest points and break to the hole to allow triangulation */


		var prevShapeVert, nextShapeVert,
			prevHoleVert, nextHoleVert,
			holeIndex, shapeIndex,
			shapeId, shapeGroup,
			h, h2,
			hole, shortest, d,
			p, pts1, pts2,
			tmpShape1, tmpShape2,
			tmpHole1, tmpHole2,
			verts = [];

		for ( h = 0; h < holes.length; h ++ ) {

			hole = holes[ h ];

			/*
			shapeholes[ h ].concat(); // preserves original
			holes.push( hole );
			*/

			Array.prototype.push.apply( allpoints, hole );

			shortest = Number.POSITIVE_INFINITY;


			// Find the shortest pair of pts between shape and hole

			// Note: Actually, I'm not sure now if we could optimize this to be faster than O(m*n)
			// Using distanceToSquared() intead of distanceTo() should speed a little
			// since running square roots operations are reduced.

			for ( h2 = 0; h2 < hole.length; h2 ++ ) {

				pts1 = hole[ h2 ];
				var dist = [];

				for ( p = 0; p < shape.length; p++ ) {

					pts2 = shape[ p ];
					d = pts1.distanceToSquared( pts2 );
					dist.push( d );

					if ( d < shortest ) {

						shortest = d;
						holeIndex = h2;
						shapeIndex = p;

					}

				}

			}

			//console.log("shortest", shortest, dist);

			prevShapeVert = ( shapeIndex - 1 ) >= 0 ? shapeIndex - 1 : shape.length - 1;
			prevHoleVert = ( holeIndex - 1 ) >= 0 ? holeIndex - 1 : hole.length - 1;

			var areaapts = [

				hole[ holeIndex ],
				shape[ shapeIndex ],
				shape[ prevShapeVert ]

			];

			var areaa = THREE.FontUtils.Triangulate.area( areaapts );

			var areabpts = [

				hole[ holeIndex ],
				hole[ prevHoleVert ],
				shape[ shapeIndex ]

			];

			var areab = THREE.FontUtils.Triangulate.area( areabpts );

			var shapeOffset = 1;
			var holeOffset = -1;

			var oldShapeIndex = shapeIndex, oldHoleIndex = holeIndex;
			shapeIndex += shapeOffset;
			holeIndex += holeOffset;

			if ( shapeIndex < 0 ) { shapeIndex += shape.length;  }
			shapeIndex %= shape.length;

			if ( holeIndex < 0 ) { holeIndex += hole.length;  }
			holeIndex %= hole.length;

			prevShapeVert = ( shapeIndex - 1 ) >= 0 ? shapeIndex - 1 : shape.length - 1;
			prevHoleVert = ( holeIndex - 1 ) >= 0 ? holeIndex - 1 : hole.length - 1;

			areaapts = [

				hole[ holeIndex ],
				shape[ shapeIndex ],
				shape[ prevShapeVert ]

			];

			var areaa2 = THREE.FontUtils.Triangulate.area( areaapts );

			areabpts = [

				hole[ holeIndex ],
				hole[ prevHoleVert ],
				shape[ shapeIndex ]

			];

			var areab2 = THREE.FontUtils.Triangulate.area( areabpts );
			//console.log(areaa,areab ,areaa2,areab2, ( areaa + areab ),  ( areaa2 + areab2 ));

			if ( ( areaa + areab ) > ( areaa2 + areab2 ) ) {

				// In case areas are not correct.
				//console.log("USE THIS");

				shapeIndex = oldShapeIndex;
				holeIndex = oldHoleIndex ;

				if ( shapeIndex < 0 ) { shapeIndex += shape.length;  }
				shapeIndex %= shape.length;

				if ( holeIndex < 0 ) { holeIndex += hole.length;  }
				holeIndex %= hole.length;

				prevShapeVert = ( shapeIndex - 1 ) >= 0 ? shapeIndex - 1 : shape.length - 1;
				prevHoleVert = ( holeIndex - 1 ) >= 0 ? holeIndex - 1 : hole.length - 1;

			} else {

				//console.log("USE THAT ")

			}

			tmpShape1 = shape.slice( 0, shapeIndex );
			tmpShape2 = shape.slice( shapeIndex );
			tmpHole1 = hole.slice( holeIndex );
			tmpHole2 = hole.slice( 0, holeIndex );

			// Should check orders here again?

			var trianglea = [

				hole[ holeIndex ],
				shape[ shapeIndex ],
				shape[ prevShapeVert ]

			];

			var triangleb = [

				hole[ holeIndex ] ,
				hole[ prevHoleVert ],
				shape[ shapeIndex ]

			];

			verts.push( trianglea );
			verts.push( triangleb );

			shape = tmpShape1.concat( tmpHole1 ).concat( tmpHole2 ).concat( tmpShape2 );

		}

		return {

			shape:shape, 		/* shape with no holes */
			isolatedPts: verts, /* isolated faces */
			allpoints: allpoints

		}


	},

	triangulateShape: function ( contour, holes ) {

		var shapeWithoutHoles = THREE.Shape.Utils.removeHoles( contour, holes );

		var shape = shapeWithoutHoles.shape,
			allpoints = shapeWithoutHoles.allpoints,
			isolatedPts = shapeWithoutHoles.isolatedPts;

		var triangles = THREE.FontUtils.Triangulate( shape, false ); // True returns indices for points of spooled shape

		// To maintain reference to old shape, one must match coordinates, or offset the indices from original arrays. It's probably easier to do the first.

		//console.log( "triangles",triangles, triangles.length );
		//console.log( "allpoints",allpoints, allpoints.length );

		var i, il, f, face,
			key, index,
			allPointsMap = {},
			isolatedPointsMap = {};

		// prepare all points map

		for ( i = 0, il = allpoints.length; i < il; i ++ ) {

			key = allpoints[ i ].x + ":" + allpoints[ i ].y;

			if ( allPointsMap[ key ] !== undefined ) {

				console.log( "Duplicate point", key );

			}

			allPointsMap[ key ] = i;

		}

		// check all face vertices against all points map

		for ( i = 0, il = triangles.length; i < il; i ++ ) {

			face = triangles[ i ];

			for ( f = 0; f < 3; f ++ ) {

				key = face[ f ].x + ":" + face[ f ].y;

				index = allPointsMap[ key ];

				if ( index !== undefined ) {

					face[ f ] = index;

				}

			}

		}

		// check isolated points vertices against all points map

		for ( i = 0, il = isolatedPts.length; i < il; i ++ ) {

			face = isolatedPts[ i ];

			for ( f = 0; f < 3; f ++ ) {

				key = face[ f ].x + ":" + face[ f ].y;

				index = allPointsMap[ key ];

				if ( index !== undefined ) {

					face[ f ] = index;

				}

			}

		}

		return triangles.concat( isolatedPts );

	}, // end triangulate shapes

	/*
	triangulate2 : function( pts, holes ) {

		// For use with Poly2Tri.js

		var allpts = pts.concat();
		var shape = [];
		for (var p in pts) {
			shape.push(new js.poly2tri.Point(pts[p].x, pts[p].y));
		}

		var swctx = new js.poly2tri.SweepContext(shape);

		for (var h in holes) {
			var aHole = holes[h];
			var newHole = []
			for (i in aHole) {
				newHole.push(new js.poly2tri.Point(aHole[i].x, aHole[i].y));
				allpts.push(aHole[i]);
			}
			swctx.AddHole(newHole);
		}

		var find;
		var findIndexForPt = function (pt) {
			find = new THREE.Vector2(pt.x, pt.y);
			var p;
			for (p=0, pl = allpts.length; p<pl; p++) {
				if (allpts[p].equals(find)) return p;
			}
			return -1;
		};

		// triangulate
		js.poly2tri.sweep.Triangulate(swctx);

		var triangles =  swctx.GetTriangles();
		var tr ;
		var facesPts = [];
		for (var t in triangles) {
			tr =  triangles[t];
			facesPts.push([
				findIndexForPt(tr.GetPoint(0)),
				findIndexForPt(tr.GetPoint(1)),
				findIndexForPt(tr.GetPoint(2))
					]);
		}


	//	console.log(facesPts);
	//	console.log("triangles", triangles.length, triangles);

		// Returns array of faces with 3 element each
	return facesPts;
	},
*/

	isClockWise: function ( pts ) {

		return THREE.FontUtils.Triangulate.area( pts ) < 0;

	},

	// Bezier Curves formulas obtained from
	// http://en.wikipedia.org/wiki/B%C3%A9zier_curve

	// Quad Bezier Functions

	b2p0: function ( t, p ) {

		var k = 1 - t;
		return k * k * p;

	},

	b2p1: function ( t, p ) {

		return 2 * ( 1 - t ) * t * p;

	},

	b2p2: function ( t, p ) {

		return t * t * p;

	},

	b2: function ( t, p0, p1, p2 ) {

		return this.b2p0( t, p0 ) + this.b2p1( t, p1 ) + this.b2p2( t, p2 );

	},

	// Cubic Bezier Functions

	b3p0: function ( t, p ) {

		var k = 1 - t;
		return k * k * k * p;

	},

	b3p1: function ( t, p ) {

		var k = 1 - t;
		return 3 * k * k * t * p;

	},

	b3p2: function ( t, p ) {

		var k = 1 - t;
		return 3 * k * t * t * p;

	},

	b3p3: function ( t, p ) {

		return t * t * t * p;

	},

	b3: function ( t, p0, p1, p2, p3 ) {

		return this.b3p0( t, p0 ) + this.b3p1( t, p1 ) + this.b3p2( t, p2 ) +  this.b3p3( t, p3 );

	}

};

/**
 * @author mikael emtinger / http://gomo.se/
 */

THREE.AnimationHandler = (function() {

	var playing = [];
	var library = {};
	var that    = {};


	//--- update ---

	that.update = function( deltaTimeMS ) {

		for( var i = 0; i < playing.length; i ++ )
			playing[ i ].update( deltaTimeMS );

	};


	//--- add ---

	that.addToUpdate = function( animation ) {

		if ( playing.indexOf( animation ) === -1 )
			playing.push( animation );

	};


	//--- remove ---

	that.removeFromUpdate = function( animation ) {

		var index = playing.indexOf( animation );

		if( index !== -1 )
			playing.splice( index, 1 );

	};


	//--- add ---

	that.add = function( data ) {

		if ( library[ data.name ] !== undefined )
			console.log( "THREE.AnimationHandler.add: Warning! " + data.name + " already exists in library. Overwriting." );

		library[ data.name ] = data;
		initData( data );

	};


	//--- get ---

	that.get = function( name ) {

		if ( typeof name === "string" ) {

			if ( library[ name ] ) {

				return library[ name ];

			} else {

				console.log( "THREE.AnimationHandler.get: Couldn't find animation " + name );
				return null;

			}

		} else {

			// todo: add simple tween library

		}

	};

	//--- parse ---

	that.parse = function( root ) {

		// setup hierarchy

		var hierarchy = [];

		if ( root instanceof THREE.SkinnedMesh ) {

			for( var b = 0; b < root.bones.length; b++ ) {

				hierarchy.push( root.bones[ b ] );

			}

		} else {

			parseRecurseHierarchy( root, hierarchy );

		}

		return hierarchy;

	};

	var parseRecurseHierarchy = function( root, hierarchy ) {

		hierarchy.push( root );

		for( var c = 0; c < root.children.length; c++ )
			parseRecurseHierarchy( root.children[ c ], hierarchy );

	}


	//--- init data ---

	var initData = function( data ) {

		if( data.initialized === true )
			return;


		// loop through all keys

		for( var h = 0; h < data.hierarchy.length; h ++ ) {

			for( var k = 0; k < data.hierarchy[ h ].keys.length; k ++ ) {

				// remove minus times

				if( data.hierarchy[ h ].keys[ k ].time < 0 )
					data.hierarchy[ h ].keys[ k ].time = 0;


				// create quaternions

				if( data.hierarchy[ h ].keys[ k ].rot !== undefined &&
				 !( data.hierarchy[ h ].keys[ k ].rot instanceof THREE.Quaternion ) ) {

					var quat = data.hierarchy[ h ].keys[ k ].rot;
					data.hierarchy[ h ].keys[ k ].rot = new THREE.Quaternion( quat[0], quat[1], quat[2], quat[3] );

				}

			}


			// prepare morph target keys

			if( data.hierarchy[ h ].keys.length && data.hierarchy[ h ].keys[ 0 ].morphTargets !== undefined ) {

				// get all used

				var usedMorphTargets = {};

				for ( var k = 0; k < data.hierarchy[ h ].keys.length; k ++ ) {

					for ( var m = 0; m < data.hierarchy[ h ].keys[ k ].morphTargets.length; m ++ ) {

						var morphTargetName = data.hierarchy[ h ].keys[ k ].morphTargets[ m ];
						usedMorphTargets[ morphTargetName ] = -1;

					}

				}

				data.hierarchy[ h ].usedMorphTargets = usedMorphTargets;


				// set all used on all frames

				for ( var k = 0; k < data.hierarchy[ h ].keys.length; k ++ ) {

					var influences = {};

					for ( var morphTargetName in usedMorphTargets ) {

						for ( var m = 0; m < data.hierarchy[ h ].keys[ k ].morphTargets.length; m ++ ) {

							if ( data.hierarchy[ h ].keys[ k ].morphTargets[ m ] === morphTargetName ) {

								influences[ morphTargetName ] = data.hierarchy[ h ].keys[ k ].morphTargetsInfluences[ m ];
								break;

							}

						}

						if ( m === data.hierarchy[ h ].keys[ k ].morphTargets.length ) {

							influences[ morphTargetName ] = 0;

						}

					}

					data.hierarchy[ h ].keys[ k ].morphTargetsInfluences = influences;

				}

			}


			// remove all keys that are on the same time

			for ( var k = 1; k < data.hierarchy[ h ].keys.length; k ++ ) {

				if ( data.hierarchy[ h ].keys[ k ].time === data.hierarchy[ h ].keys[ k - 1 ].time ) {

					data.hierarchy[ h ].keys.splice( k, 1 );
					k --;

				}

			}


			// set index

			for ( var k = 0; k < data.hierarchy[ h ].keys.length; k ++ ) {

				data.hierarchy[ h ].keys[ k ].index = k;

			}

		}


		// JIT

		var lengthInFrames = parseInt( data.length * data.fps, 10 );

		data.JIT = {};
		data.JIT.hierarchy = [];

		for( var h = 0; h < data.hierarchy.length; h ++ )
			data.JIT.hierarchy.push( new Array( lengthInFrames ) );


		// done

		data.initialized = true;

	};


	// interpolation types

	that.LINEAR = 0;
	that.CATMULLROM = 1;
	that.CATMULLROM_FORWARD = 2;

	return that;

}());
/**
 * @author mikael emtinger / http://gomo.se/
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Animation = function ( root, name, interpolationType ) {

	this.root = root;
	this.data = THREE.AnimationHandler.get( name );
	this.hierarchy = THREE.AnimationHandler.parse( root );

	this.currentTime = 0;
	this.timeScale = 1;

	this.isPlaying = false;
	this.isPaused = true;
	this.loop = true;

	this.interpolationType = interpolationType !== undefined ? interpolationType : THREE.AnimationHandler.LINEAR;

	this.points = [];
	this.target = new THREE.Vector3();

};

THREE.Animation.prototype.play = function ( loop, startTimeMS ) {

	if ( this.isPlaying === false ) {

		this.isPlaying = true;
		this.loop = loop !== undefined ? loop : true;
		this.currentTime = startTimeMS !== undefined ? startTimeMS : 0;

		// reset key cache

		var h, hl = this.hierarchy.length,
			object;

		for ( h = 0; h < hl; h ++ ) {

			object = this.hierarchy[ h ];

			if ( this.interpolationType !== THREE.AnimationHandler.CATMULLROM_FORWARD ) {

				object.useQuaternion = true;

			}

			object.matrixAutoUpdate = true;

			if ( object.animationCache === undefined ) {

				object.animationCache = {};
				object.animationCache.prevKey = { pos: 0, rot: 0, scl: 0 };
				object.animationCache.nextKey = { pos: 0, rot: 0, scl: 0 };
				object.animationCache.originalMatrix = object instanceof THREE.Bone ? object.skinMatrix : object.matrix;

			}

			var prevKey = object.animationCache.prevKey;
			var nextKey = object.animationCache.nextKey;

			prevKey.pos = this.data.hierarchy[ h ].keys[ 0 ];
			prevKey.rot = this.data.hierarchy[ h ].keys[ 0 ];
			prevKey.scl = this.data.hierarchy[ h ].keys[ 0 ];

			nextKey.pos = this.getNextKeyWith( "pos", h, 1 );
			nextKey.rot = this.getNextKeyWith( "rot", h, 1 );
			nextKey.scl = this.getNextKeyWith( "scl", h, 1 );

		}

		this.update( 0 );

	}

	this.isPaused = false;

	THREE.AnimationHandler.addToUpdate( this );

};


THREE.Animation.prototype.pause = function() {

	if ( this.isPaused === true ) {

		THREE.AnimationHandler.addToUpdate( this );

	} else {

		THREE.AnimationHandler.removeFromUpdate( this );

	}

	this.isPaused = !this.isPaused;

};


THREE.Animation.prototype.stop = function() {

	this.isPlaying = false;
	this.isPaused  = false;
	THREE.AnimationHandler.removeFromUpdate( this );

};


THREE.Animation.prototype.update = function ( deltaTimeMS ) {

	// early out

	if ( this.isPlaying === false ) return;


	// vars

	var types = [ "pos", "rot", "scl" ];
	var type;
	var scale;
	var vector;
	var prevXYZ, nextXYZ;
	var prevKey, nextKey;
	var object;
	var animationCache;
	var frame;
	var JIThierarchy = this.data.JIT.hierarchy;
	var currentTime, unloopedCurrentTime;
	var currentPoint, forwardPoint, angle;


	this.currentTime += deltaTimeMS * this.timeScale;

	unloopedCurrentTime = this.currentTime;
	currentTime = this.currentTime = this.currentTime % this.data.length;
	frame = parseInt( Math.min( currentTime * this.data.fps, this.data.length * this.data.fps ), 10 );


	for ( var h = 0, hl = this.hierarchy.length; h < hl; h ++ ) {

		object = this.hierarchy[ h ];
		animationCache = object.animationCache;

		// loop through pos/rot/scl

		for ( var t = 0; t < 3; t ++ ) {

			// get keys

			type    = types[ t ];
			prevKey = animationCache.prevKey[ type ];
			nextKey = animationCache.nextKey[ type ];

			// switch keys?

			if ( nextKey.time <= unloopedCurrentTime ) {

				// did we loop?

				if ( currentTime < unloopedCurrentTime ) {

					if ( this.loop ) {

						prevKey = this.data.hierarchy[ h ].keys[ 0 ];
						nextKey = this.getNextKeyWith( type, h, 1 );

						while( nextKey.time < currentTime ) {

							prevKey = nextKey;
							nextKey = this.getNextKeyWith( type, h, nextKey.index + 1 );

						}

					} else {

						this.stop();
						return;

					}

				} else {

					do {

						prevKey = nextKey;
						nextKey = this.getNextKeyWith( type, h, nextKey.index + 1 );

					} while( nextKey.time < currentTime )

				}

				animationCache.prevKey[ type ] = prevKey;
				animationCache.nextKey[ type ] = nextKey;

			}


			object.matrixAutoUpdate = true;
			object.matrixWorldNeedsUpdate = true;

			scale = ( currentTime - prevKey.time ) / ( nextKey.time - prevKey.time );
			prevXYZ = prevKey[ type ];
			nextXYZ = nextKey[ type ];


			// check scale error

			if ( scale < 0 || scale > 1 ) {

				console.log( "THREE.Animation.update: Warning! Scale out of bounds:" + scale + " on bone " + h );
				scale = scale < 0 ? 0 : 1;

			}

			// interpolate

			if ( type === "pos" ) {

				vector = object.position;

				if ( this.interpolationType === THREE.AnimationHandler.LINEAR ) {

					vector.x = prevXYZ[ 0 ] + ( nextXYZ[ 0 ] - prevXYZ[ 0 ] ) * scale;
					vector.y = prevXYZ[ 1 ] + ( nextXYZ[ 1 ] - prevXYZ[ 1 ] ) * scale;
					vector.z = prevXYZ[ 2 ] + ( nextXYZ[ 2 ] - prevXYZ[ 2 ] ) * scale;

				} else if ( this.interpolationType === THREE.AnimationHandler.CATMULLROM ||
						    this.interpolationType === THREE.AnimationHandler.CATMULLROM_FORWARD ) {

					this.points[ 0 ] = this.getPrevKeyWith( "pos", h, prevKey.index - 1 )[ "pos" ];
					this.points[ 1 ] = prevXYZ;
					this.points[ 2 ] = nextXYZ;
					this.points[ 3 ] = this.getNextKeyWith( "pos", h, nextKey.index + 1 )[ "pos" ];

					scale = scale * 0.33 + 0.33;

					currentPoint = this.interpolateCatmullRom( this.points, scale );

					vector.x = currentPoint[ 0 ];
					vector.y = currentPoint[ 1 ];
					vector.z = currentPoint[ 2 ];

					if ( this.interpolationType === THREE.AnimationHandler.CATMULLROM_FORWARD ) {

						forwardPoint = this.interpolateCatmullRom( this.points, scale * 1.01 );

						this.target.set( forwardPoint[ 0 ], forwardPoint[ 1 ], forwardPoint[ 2 ] );
						this.target.subSelf( vector );
						this.target.y = 0;
						this.target.normalize();

						angle = Math.atan2( this.target.x, this.target.z );
						object.rotation.set( 0, angle, 0 );

					}

				}

			} else if ( type === "rot" ) {

				THREE.Quaternion.slerp( prevXYZ, nextXYZ, object.quaternion, scale );

			} else if ( type === "scl" ) {

				vector = object.scale;

				vector.x = prevXYZ[ 0 ] + ( nextXYZ[ 0 ] - prevXYZ[ 0 ] ) * scale;
				vector.y = prevXYZ[ 1 ] + ( nextXYZ[ 1 ] - prevXYZ[ 1 ] ) * scale;
				vector.z = prevXYZ[ 2 ] + ( nextXYZ[ 2 ] - prevXYZ[ 2 ] ) * scale;

			}

		}

	}

};

// Catmull-Rom spline

THREE.Animation.prototype.interpolateCatmullRom = function ( points, scale ) {

	var c = [], v3 = [],
	point, intPoint, weight, w2, w3,
	pa, pb, pc, pd;

	point = ( points.length - 1 ) * scale;
	intPoint = Math.floor( point );
	weight = point - intPoint;

	c[ 0 ] = intPoint === 0 ? intPoint : intPoint - 1;
	c[ 1 ] = intPoint;
	c[ 2 ] = intPoint > points.length - 2 ? intPoint : intPoint + 1;
	c[ 3 ] = intPoint > points.length - 3 ? intPoint : intPoint + 2;

	pa = points[ c[ 0 ] ];
	pb = points[ c[ 1 ] ];
	pc = points[ c[ 2 ] ];
	pd = points[ c[ 3 ] ];

	w2 = weight * weight;
	w3 = weight * w2;

	v3[ 0 ] = this.interpolate( pa[ 0 ], pb[ 0 ], pc[ 0 ], pd[ 0 ], weight, w2, w3 );
	v3[ 1 ] = this.interpolate( pa[ 1 ], pb[ 1 ], pc[ 1 ], pd[ 1 ], weight, w2, w3 );
	v3[ 2 ] = this.interpolate( pa[ 2 ], pb[ 2 ], pc[ 2 ], pd[ 2 ], weight, w2, w3 );

	return v3;

};

THREE.Animation.prototype.interpolate = function ( p0, p1, p2, p3, t, t2, t3 ) {

	var v0 = ( p2 - p0 ) * 0.5,
		v1 = ( p3 - p1 ) * 0.5;

	return ( 2 * ( p1 - p2 ) + v0 + v1 ) * t3 + ( - 3 * ( p1 - p2 ) - 2 * v0 - v1 ) * t2 + v0 * t + p1;

};



// Get next key with

THREE.Animation.prototype.getNextKeyWith = function ( type, h, key ) {

	var keys = this.data.hierarchy[ h ].keys;

	if ( this.interpolationType === THREE.AnimationHandler.CATMULLROM ||
		 this.interpolationType === THREE.AnimationHandler.CATMULLROM_FORWARD ) {

		key = key < keys.length - 1 ? key : keys.length - 1;

	} else {

		key = key % keys.length;

	}

	for ( ; key < keys.length; key++ ) {

		if ( keys[ key ][ type ] !== undefined ) {

			return keys[ key ];

		}

	}

	return this.data.hierarchy[ h ].keys[ 0 ];

};

// Get previous key with

THREE.Animation.prototype.getPrevKeyWith = function ( type, h, key ) {

	var keys = this.data.hierarchy[ h ].keys;

	if ( this.interpolationType === THREE.AnimationHandler.CATMULLROM ||
		 this.interpolationType === THREE.AnimationHandler.CATMULLROM_FORWARD ) {

		key = key > 0 ? key : 0;

	} else {

		key = key >= 0 ? key : key + keys.length;

	}


	for ( ; key >= 0; key -- ) {

		if ( keys[ key ][ type ] !== undefined ) {

			return keys[ key ];

		}

	}

	return this.data.hierarchy[ h ].keys[ keys.length - 1 ];

};
/**
 * @author mikael emtinger / http://gomo.se/
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 * @author khang duong
 * @author erik kitson
 */

THREE.KeyFrameAnimation = function( root, data, JITCompile ) {

	this.root = root;
	this.data = THREE.AnimationHandler.get( data );
	this.hierarchy = THREE.AnimationHandler.parse( root );
	this.currentTime = 0;
	this.timeScale = 0.001;
	this.isPlaying = false;
	this.isPaused = true;
	this.loop = true;
	this.JITCompile = JITCompile !== undefined ? JITCompile : true;

	// initialize to first keyframes

	for ( var h = 0, hl = this.hierarchy.length; h < hl; h++ ) {

		var keys = this.data.hierarchy[h].keys,
			sids = this.data.hierarchy[h].sids,
			obj = this.hierarchy[h];

		if ( keys.length && sids ) {

			for ( var s = 0; s < sids.length; s++ ) {

				var sid = sids[ s ],
					next = this.getNextKeyWith( sid, h, 0 );

				if ( next ) {

					next.apply( sid );

				}

			}

			obj.matrixAutoUpdate = false;
			this.data.hierarchy[h].node.updateMatrix();
			obj.matrixWorldNeedsUpdate = true;

		}

	}

};

// Play

THREE.KeyFrameAnimation.prototype.play = function( loop, startTimeMS ) {

	if( !this.isPlaying ) {

		this.isPlaying = true;
		this.loop = loop !== undefined ? loop : true;
		this.currentTime = startTimeMS !== undefined ? startTimeMS : 0;
		this.startTimeMs = startTimeMS;
		this.startTime = 10000000;
		this.endTime = -this.startTime;


		// reset key cache

		var h, hl = this.hierarchy.length,
			object,
			node;

		for ( h = 0; h < hl; h++ ) {

			object = this.hierarchy[ h ];
			node = this.data.hierarchy[ h ];
			object.useQuaternion = true;

			if ( node.animationCache === undefined ) {

				node.animationCache = {};
				node.animationCache.prevKey = null;
				node.animationCache.nextKey = null;
				node.animationCache.originalMatrix = object instanceof THREE.Bone ? object.skinMatrix : object.matrix;

			}

			var keys = this.data.hierarchy[h].keys;

			if (keys.length) {

				node.animationCache.prevKey = keys[ 0 ];
				node.animationCache.nextKey = keys[ 1 ];

				this.startTime = Math.min( keys[0].time, this.startTime );
				this.endTime = Math.max( keys[keys.length - 1].time, this.endTime );

			}

		}

		this.update( 0 );

	}

	this.isPaused = false;

	THREE.AnimationHandler.addToUpdate( this );

};



// Pause

THREE.KeyFrameAnimation.prototype.pause = function() {

	if( this.isPaused ) {

		THREE.AnimationHandler.addToUpdate( this );

	} else {

		THREE.AnimationHandler.removeFromUpdate( this );

	}

	this.isPaused = !this.isPaused;

};


// Stop

THREE.KeyFrameAnimation.prototype.stop = function() {

	this.isPlaying = false;
	this.isPaused  = false;
	THREE.AnimationHandler.removeFromUpdate( this );


	// reset JIT matrix and remove cache

	for ( var h = 0; h < this.data.hierarchy.length; h++ ) {

        var obj = this.hierarchy[ h ];
		var node = this.data.hierarchy[ h ];

		if ( node.animationCache !== undefined ) {

			var original = node.animationCache.originalMatrix;

			if( obj instanceof THREE.Bone ) {

				original.copy( obj.skinMatrix );
				obj.skinMatrix = original;

			} else {

				original.copy( obj.matrix );
				obj.matrix = original;

			}

			delete node.animationCache;

		}

	}

};


// Update

THREE.KeyFrameAnimation.prototype.update = function( deltaTimeMS ) {

	// early out

	if( !this.isPlaying ) return;


	// vars

	var prevKey, nextKey;
	var object;
	var node;
	var frame;
	var JIThierarchy = this.data.JIT.hierarchy;
	var currentTime, unloopedCurrentTime;
	var looped;


	// update

	this.currentTime += deltaTimeMS * this.timeScale;

	unloopedCurrentTime = this.currentTime;
	currentTime         = this.currentTime = this.currentTime % this.data.length;

	// if looped around, the current time should be based on the startTime
	if ( currentTime < this.startTimeMs ) {

		currentTime = this.currentTime = this.startTimeMs + currentTime;

	}

	frame               = parseInt( Math.min( currentTime * this.data.fps, this.data.length * this.data.fps ), 10 );
	looped 				= currentTime < unloopedCurrentTime;

	if ( looped && !this.loop ) {

		// Set the animation to the last keyframes and stop
		for ( var h = 0, hl = this.hierarchy.length; h < hl; h++ ) {

			var keys = this.data.hierarchy[h].keys,
				sids = this.data.hierarchy[h].sids,
				end = keys.length-1,
				obj = this.hierarchy[h];

			if ( keys.length ) {

				for ( var s = 0; s < sids.length; s++ ) {

					var sid = sids[ s ],
						prev = this.getPrevKeyWith( sid, h, end );

					if ( prev ) {
						prev.apply( sid );

					}

				}

				this.data.hierarchy[h].node.updateMatrix();
				obj.matrixWorldNeedsUpdate = true;

			}

		}

		this.stop();
		return;

	}

	// check pre-infinity
	if ( currentTime < this.startTime ) {

		return;

	}

	// update

	for ( var h = 0, hl = this.hierarchy.length; h < hl; h++ ) {

		object = this.hierarchy[ h ];
		node = this.data.hierarchy[ h ];

		var keys = node.keys,
			animationCache = node.animationCache;

		// use JIT?

		if ( this.JITCompile && JIThierarchy[ h ][ frame ] !== undefined ) {

			if( object instanceof THREE.Bone ) {

				object.skinMatrix = JIThierarchy[ h ][ frame ];
				object.matrixWorldNeedsUpdate = false;

			} else {

				object.matrix = JIThierarchy[ h ][ frame ];
				object.matrixWorldNeedsUpdate = true;

			}

		// use interpolation

		} else if ( keys.length ) {

			// make sure so original matrix and not JIT matrix is set

			if ( this.JITCompile && animationCache ) {

				if( object instanceof THREE.Bone ) {

					object.skinMatrix = animationCache.originalMatrix;

				} else {

					object.matrix = animationCache.originalMatrix;

				}

			}

			prevKey = animationCache.prevKey;
			nextKey = animationCache.nextKey;

			if ( prevKey && nextKey ) {

				// switch keys?

				if ( nextKey.time <= unloopedCurrentTime ) {

					// did we loop?

					if ( looped && this.loop ) {

						prevKey = keys[ 0 ];
						nextKey = keys[ 1 ];

						while ( nextKey.time < currentTime ) {

							prevKey = nextKey;
							nextKey = keys[ prevKey.index + 1 ];

						}

					} else if ( !looped ) {

						var lastIndex = keys.length - 1;

						while ( nextKey.time < currentTime && nextKey.index !== lastIndex ) {

							prevKey = nextKey;
							nextKey = keys[ prevKey.index + 1 ];

						}

					}

					animationCache.prevKey = prevKey;
					animationCache.nextKey = nextKey;

				}
                if(nextKey.time >= currentTime)
                    prevKey.interpolate( nextKey, currentTime );
                else
                    prevKey.interpolate( nextKey, nextKey.time);

			}

			this.data.hierarchy[h].node.updateMatrix();
			object.matrixWorldNeedsUpdate = true;

		}

	}

	// update JIT?

	if ( this.JITCompile ) {

		if ( JIThierarchy[ 0 ][ frame ] === undefined ) {

			this.hierarchy[ 0 ].updateMatrixWorld( true );

			for ( var h = 0; h < this.hierarchy.length; h++ ) {

				if( this.hierarchy[ h ] instanceof THREE.Bone ) {

					JIThierarchy[ h ][ frame ] = this.hierarchy[ h ].skinMatrix.clone();

				} else {

					JIThierarchy[ h ][ frame ] = this.hierarchy[ h ].matrix.clone();

				}

			}

		}

	}

};

// Get next key with

THREE.KeyFrameAnimation.prototype.getNextKeyWith = function( sid, h, key ) {

	var keys = this.data.hierarchy[ h ].keys;
	key = key % keys.length;

	for ( ; key < keys.length; key++ ) {

		if ( keys[ key ].hasTarget( sid ) ) {

			return keys[ key ];

		}

	}

	return keys[ 0 ];

};

// Get previous key with

THREE.KeyFrameAnimation.prototype.getPrevKeyWith = function( sid, h, key ) {

	var keys = this.data.hierarchy[ h ].keys;
	key = key >= 0 ? key : key + keys.length;

	for ( ; key >= 0; key-- ) {

		if ( keys[ key ].hasTarget( sid ) ) {

			return keys[ key ];

		}

	}

	return keys[ keys.length - 1 ];

};
/**
 * Camera for rendering cube maps
 *	- renders scene into axis-aligned cube
 *
 * @author alteredq / http://alteredqualia.com/
 */

THREE.CubeCamera = function ( near, far, cubeResolution ) {

	THREE.Object3D.call( this );

	var fov = 90, aspect = 1;

	var cameraPX = new THREE.PerspectiveCamera( fov, aspect, near, far );
	cameraPX.up.set( 0, -1, 0 );
	cameraPX.lookAt( new THREE.Vector3( 1, 0, 0 ) );
	this.add( cameraPX );

	var cameraNX = new THREE.PerspectiveCamera( fov, aspect, near, far );
	cameraNX.up.set( 0, -1, 0 );
	cameraNX.lookAt( new THREE.Vector3( -1, 0, 0 ) );
	this.add( cameraNX );

	var cameraPY = new THREE.PerspectiveCamera( fov, aspect, near, far );
	cameraPY.up.set( 0, 0, 1 );
	cameraPY.lookAt( new THREE.Vector3( 0, 1, 0 ) );
	this.add( cameraPY );

	var cameraNY = new THREE.PerspectiveCamera( fov, aspect, near, far );
	cameraNY.up.set( 0, 0, -1 );
	cameraNY.lookAt( new THREE.Vector3( 0, -1, 0 ) );
	this.add( cameraNY );

	var cameraPZ = new THREE.PerspectiveCamera( fov, aspect, near, far );
	cameraPZ.up.set( 0, -1, 0 );
	cameraPZ.lookAt( new THREE.Vector3( 0, 0, 1 ) );
	this.add( cameraPZ );

	var cameraNZ = new THREE.PerspectiveCamera( fov, aspect, near, far );
	cameraNZ.up.set( 0, -1, 0 );
	cameraNZ.lookAt( new THREE.Vector3( 0, 0, -1 ) );
	this.add( cameraNZ );

	this.renderTarget = new THREE.WebGLRenderTargetCube( cubeResolution, cubeResolution, { format: THREE.RGBFormat, magFilter: THREE.LinearFilter, minFilter: THREE.LinearFilter } );

	this.updateCubeMap = function ( renderer, scene ) {

		var renderTarget = this.renderTarget;
		var generateMipmaps = renderTarget.generateMipmaps;

		renderTarget.generateMipmaps = false;

		renderTarget.activeCubeFace = 0;
		renderer.render( scene, cameraPX, renderTarget );

		renderTarget.activeCubeFace = 1;
		renderer.render( scene, cameraNX, renderTarget );

		renderTarget.activeCubeFace = 2;
		renderer.render( scene, cameraPY, renderTarget );

		renderTarget.activeCubeFace = 3;
		renderer.render( scene, cameraNY, renderTarget );

		renderTarget.activeCubeFace = 4;
		renderer.render( scene, cameraPZ, renderTarget );

		renderTarget.generateMipmaps = generateMipmaps;

		renderTarget.activeCubeFace = 5;
		renderer.render( scene, cameraNZ, renderTarget );

	};

};

THREE.CubeCamera.prototype = Object.create( THREE.Object3D.prototype );
/*
 *	@author zz85 / http://twitter.com/blurspline / http://www.lab4games.net/zz85/blog
 *
 *	A general perpose camera, for setting FOV, Lens Focal Length,
 *		and switching between perspective and orthographic views easily.
 *		Use this only if you do not wish to manage
 *		both a Orthographic and Perspective Camera
 *
 */


THREE.CombinedCamera = function ( width, height, fov, near, far, orthoNear, orthoFar ) {

	THREE.Camera.call( this );

	this.fov = fov;

	this.left = -width / 2;
	this.right = width / 2
	this.top = height / 2;
	this.bottom = -height / 2;

	// We could also handle the projectionMatrix internally, but just wanted to test nested camera objects

	this.cameraO = new THREE.OrthographicCamera( width / - 2, width / 2, height / 2, height / - 2, 	orthoNear, orthoFar );
	this.cameraP = new THREE.PerspectiveCamera( fov, width / height, near, far );

	this.zoom = 1;

	this.toPerspective();

	var aspect = width/height;

};

THREE.CombinedCamera.prototype = Object.create( THREE.Camera.prototype );

THREE.CombinedCamera.prototype.toPerspective = function () {

	// Switches to the Perspective Camera

	this.near = this.cameraP.near;
	this.far = this.cameraP.far;

	this.cameraP.fov =  this.fov / this.zoom ;

	this.cameraP.updateProjectionMatrix();

	this.projectionMatrix = this.cameraP.projectionMatrix;

	this.inPerspectiveMode = true;
	this.inOrthographicMode = false;

};

THREE.CombinedCamera.prototype.toOrthographic = function () {

	// Switches to the Orthographic camera estimating viewport from Perspective

	var fov = this.fov;
	var aspect = this.cameraP.aspect;
	var near = this.cameraP.near;
	var far = this.cameraP.far;

	// The size that we set is the mid plane of the viewing frustum

	var hyperfocus = ( near + far ) / 2;

	var halfHeight = Math.tan( fov / 2 ) * hyperfocus;
	var planeHeight = 2 * halfHeight;
	var planeWidth = planeHeight * aspect;
	var halfWidth = planeWidth / 2;

	halfHeight /= this.zoom;
	halfWidth /= this.zoom;

	this.cameraO.left = -halfWidth;
	this.cameraO.right = halfWidth;
	this.cameraO.top = halfHeight;
	this.cameraO.bottom = -halfHeight;

	// this.cameraO.left = -farHalfWidth;
	// this.cameraO.right = farHalfWidth;
	// this.cameraO.top = farHalfHeight;
	// this.cameraO.bottom = -farHalfHeight;

	// this.cameraO.left = this.left / this.zoom;
	// this.cameraO.right = this.right / this.zoom;
	// this.cameraO.top = this.top / this.zoom;
	// this.cameraO.bottom = this.bottom / this.zoom;

	this.cameraO.updateProjectionMatrix();

	this.near = this.cameraO.near;
	this.far = this.cameraO.far;
	this.projectionMatrix = this.cameraO.projectionMatrix;

	this.inPerspectiveMode = false;
	this.inOrthographicMode = true;

};


THREE.CombinedCamera.prototype.setSize = function( width, height ) {

	this.cameraP.aspect = width / height;
	this.left = -width / 2;
	this.right = width / 2
	this.top = height / 2;
	this.bottom = -height / 2;

};


THREE.CombinedCamera.prototype.setFov = function( fov ) {

	this.fov = fov;

	if ( this.inPerspectiveMode ) {

		this.toPerspective();

	} else {

		this.toOrthographic();

	}

};

// For mantaining similar API with PerspectiveCamera

THREE.CombinedCamera.prototype.updateProjectionMatrix = function() {

	if ( this.inPerspectiveMode ) {

		this.toPerspective();

	} else {

		this.toPerspective();
		this.toOrthographic();

	}

};

/*
* Uses Focal Length (in mm) to estimate and set FOV
* 35mm (fullframe) camera is used if frame size is not specified;
* Formula based on http://www.bobatkins.com/photography/technical/field_of_view.html
*/
THREE.CombinedCamera.prototype.setLens = function ( focalLength, frameHeight ) {

	if ( frameHeight === undefined ) frameHeight = 24;

	var fov = 2 * Math.atan( frameHeight / ( focalLength * 2 ) ) * ( 180 / Math.PI );

	this.setFov( fov );

	return fov;
};


THREE.CombinedCamera.prototype.setZoom = function( zoom ) {

	this.zoom = zoom;

	if ( this.inPerspectiveMode ) {

		this.toPerspective();

	} else {

		this.toOrthographic();

	}

};

THREE.CombinedCamera.prototype.toFrontView = function() {

	this.rotation.x = 0;
	this.rotation.y = 0;
	this.rotation.z = 0;

	// should we be modifing the matrix instead?

	this.rotationAutoUpdate = false;

};

THREE.CombinedCamera.prototype.toBackView = function() {

	this.rotation.x = 0;
	this.rotation.y = Math.PI;
	this.rotation.z = 0;
	this.rotationAutoUpdate = false;

};

THREE.CombinedCamera.prototype.toLeftView = function() {

	this.rotation.x = 0;
	this.rotation.y = - Math.PI / 2;
	this.rotation.z = 0;
	this.rotationAutoUpdate = false;

};

THREE.CombinedCamera.prototype.toRightView = function() {

	this.rotation.x = 0;
	this.rotation.y = Math.PI / 2;
	this.rotation.z = 0;
	this.rotationAutoUpdate = false;

};

THREE.CombinedCamera.prototype.toTopView = function() {

	this.rotation.x = - Math.PI / 2;
	this.rotation.y = 0;
	this.rotation.z = 0;
	this.rotationAutoUpdate = false;

};

THREE.CombinedCamera.prototype.toBottomView = function() {

	this.rotation.x = Math.PI / 2;
	this.rotation.y = 0;
	this.rotation.z = 0;
	this.rotationAutoUpdate = false;

};

/**
 * @author alteredq / http://alteredqualia.com/
 *
 *	- 3d asterisk shape (for line pieces THREE.Line)
 */

THREE.AsteriskGeometry = function ( innerRadius, outerRadius ) {

	THREE.Geometry.call( this );

	var sd = innerRadius;
	var ed = outerRadius;

	var sd2 = 0.707 * sd;
	var ed2 = 0.707 * ed;

	var rays = [ [ sd, 0, 0 ], [ ed, 0, 0 ], [ -sd, 0, 0 ], [ -ed, 0, 0 ],
				 [ 0, sd, 0 ], [ 0, ed, 0 ], [ 0, -sd, 0 ], [ 0, -ed, 0 ],
				 [ 0, 0, sd ], [ 0, 0, ed ], [ 0, 0, -sd ], [ 0, 0, -ed ],
				 [ sd2, sd2, 0 ], [ ed2, ed2, 0 ], [ -sd2, -sd2, 0 ], [ -ed2, -ed2, 0 ],
				 [ sd2, -sd2, 0 ], [ ed2, -ed2, 0 ], [ -sd2, sd2, 0 ], [ -ed2, ed2, 0 ],
				 [ sd2, 0, sd2 ], [ ed2, 0, ed2 ], [ -sd2, 0, -sd2 ], [ -ed2, 0, -ed2 ],
				 [ sd2, 0, -sd2 ], [ ed2, 0, -ed2 ], [ -sd2, 0, sd2 ], [ -ed2, 0, ed2 ],
				 [ 0, sd2, sd2 ], [ 0, ed2, ed2 ], [ 0, -sd2, -sd2 ], [ 0, -ed2, -ed2 ],
				 [ 0, sd2, -sd2 ], [ 0, ed2, -ed2 ], [ 0, -sd2, sd2 ], [ 0, -ed2, ed2 ]
	];

	for ( var i = 0, il = rays.length; i < il; i ++ ) {

		var x = rays[ i ][ 0 ];
		var y = rays[ i ][ 1 ];
		var z = rays[ i ][ 2 ];

		this.vertices.push( new THREE.Vector3( x, y, z ) );

	}

};

THREE.AsteriskGeometry.prototype = Object.create( THREE.Geometry.prototype );/**
 * @author hughes
 */

THREE.CircleGeometry = function ( radius, segments, thetaStart, thetaLength ) {

    THREE.Geometry.call( this );

    radius = radius || 50;

    thetaStart = thetaStart !== undefined ? thetaStart : 0;
    thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;
    segments = segments !== undefined ? Math.max( 3, segments ) : 8;

    var i, uvs = [],
    center = new THREE.Vector3(), centerUV = new THREE.UV( 0.5, 0.5 );

    this.vertices.push(center);
    uvs.push( centerUV );

    for ( i = 0; i <= segments; i ++ ) {

        var vertex = new THREE.Vector3();

        vertex.x = radius * Math.cos( thetaStart + i / segments * thetaLength );
        vertex.y = radius * Math.sin( thetaStart + i / segments * thetaLength );

        this.vertices.push( vertex );
        uvs.push( new THREE.UV( ( vertex.x / radius + 1 ) / 2, - ( vertex.y / radius + 1 ) / 2 + 1 ) );

    }

    var n = new THREE.Vector3( 0, 0, -1 );

    for ( i = 1; i <= segments; i ++ ) {

        var v1 = i;
        var v2 = i + 1 ;
        var v3 = 0;

        this.faces.push( new THREE.Face3( v1, v2, v3, [ n, n, n ] ) );
        this.faceVertexUvs[ 0 ].push( [ uvs[ i ], uvs[ i + 1 ], centerUV ] );

    }

    this.computeCentroids();
    this.computeFaceNormals();

    this.boundingSphere = { radius: radius };

};

THREE.CircleGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author mrdoob / http://mrdoob.com/
 * based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Cube.as
 */

THREE.CubeGeometry = function ( width, height, depth, widthSegments, heightSegments, depthSegments ) {

	THREE.Geometry.call( this );

	var scope = this;

	this.width = width;
	this.height = height;
	this.depth = depth;

	this.widthSegments = widthSegments || 1;
	this.heightSegments = heightSegments || 1;
	this.depthSegments = depthSegments || 1;

	var width_half = this.width / 2;
	var height_half = this.height / 2;
	var depth_half = this.depth / 2;

	buildPlane( 'z', 'y', - 1, - 1, this.depth, this.height, width_half, 0 ); // px
	buildPlane( 'z', 'y',   1, - 1, this.depth, this.height, - width_half, 1 ); // nx
	buildPlane( 'x', 'z',   1,   1, this.width, this.depth, height_half, 2 ); // py
	buildPlane( 'x', 'z',   1, - 1, this.width, this.depth, - height_half, 3 ); // ny
	buildPlane( 'x', 'y',   1, - 1, this.width, this.height, depth_half, 4 ); // pz
	buildPlane( 'x', 'y', - 1, - 1, this.width, this.height, - depth_half, 5 ); // nz

	function buildPlane( u, v, udir, vdir, width, height, depth, materialIndex ) {

		var w, ix, iy,
		gridX = scope.widthSegments,
		gridY = scope.heightSegments,
		width_half = width / 2,
		height_half = height / 2,
		offset = scope.vertices.length;

		if ( ( u === 'x' && v === 'y' ) || ( u === 'y' && v === 'x' ) ) {

			w = 'z';

		} else if ( ( u === 'x' && v === 'z' ) || ( u === 'z' && v === 'x' ) ) {

			w = 'y';
			gridY = scope.depthSegments;

		} else if ( ( u === 'z' && v === 'y' ) || ( u === 'y' && v === 'z' ) ) {

			w = 'x';
			gridX = scope.depthSegments;

		}

		var gridX1 = gridX + 1,
		gridY1 = gridY + 1,
		segment_width = width / gridX,
		segment_height = height / gridY,
		normal = new THREE.Vector3();

		normal[ w ] = depth > 0 ? 1 : - 1;

		for ( iy = 0; iy < gridY1; iy ++ ) {

			for ( ix = 0; ix < gridX1; ix ++ ) {

				var vector = new THREE.Vector3();
				vector[ u ] = ( ix * segment_width - width_half ) * udir;
				vector[ v ] = ( iy * segment_height - height_half ) * vdir;
				vector[ w ] = depth;

				scope.vertices.push( vector );

			}

		}

		for ( iy = 0; iy < gridY; iy++ ) {

			for ( ix = 0; ix < gridX; ix++ ) {

				var a = ix + gridX1 * iy;
				var b = ix + gridX1 * ( iy + 1 );
				var c = ( ix + 1 ) + gridX1 * ( iy + 1 );
				var d = ( ix + 1 ) + gridX1 * iy;

				var face = new THREE.Face4( a + offset, b + offset, c + offset, d + offset );
				face.normal.copy( normal );
				face.vertexNormals.push( normal.clone(), normal.clone(), normal.clone(), normal.clone() );
				face.materialIndex = materialIndex;

				scope.faces.push( face );
				scope.faceVertexUvs[ 0 ].push( [
							new THREE.UV( ix / gridX, 1 - iy / gridY ),
							new THREE.UV( ix / gridX, 1 - ( iy + 1 ) / gridY ),
							new THREE.UV( ( ix + 1 ) / gridX, 1- ( iy + 1 ) / gridY ),
							new THREE.UV( ( ix + 1 ) / gridX, 1 - iy / gridY )
						] );

			}

		}

	}

	this.computeCentroids();
	this.mergeVertices();

};

THREE.CubeGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.CylinderGeometry = function ( radiusTop, radiusBottom, height, radiusSegments, heightSegments, openEnded ) {

	THREE.Geometry.call( this );

	radiusTop = radiusTop !== undefined ? radiusTop : 20;
	radiusBottom = radiusBottom !== undefined ? radiusBottom : 20;
	height = height !== undefined ? height : 100;

	var heightHalf = height / 2;
	var segmentsX = radiusSegments || 8;
	var segmentsY = heightSegments || 1;

	var x, y, vertices = [], uvs = [];

	for ( y = 0; y <= segmentsY; y ++ ) {

		var verticesRow = [];
		var uvsRow = [];

		var v = y / segmentsY;
		var radius = v * ( radiusBottom - radiusTop ) + radiusTop;

		for ( x = 0; x <= segmentsX; x ++ ) {

			var u = x / segmentsX;

			var vertex = new THREE.Vector3();
			vertex.x = radius * Math.sin( u * Math.PI * 2 );
			vertex.y = - v * height + heightHalf;
			vertex.z = radius * Math.cos( u * Math.PI * 2 );

			this.vertices.push( vertex );

			verticesRow.push( this.vertices.length - 1 );
			uvsRow.push( new THREE.UV( u, 1 - v ) );

		}

		vertices.push( verticesRow );
		uvs.push( uvsRow );

	}

	var tanTheta = ( radiusBottom - radiusTop ) / height;
	var na, nb;

	for ( x = 0; x < segmentsX; x ++ ) {

		if ( radiusTop !== 0 ) {

			na = this.vertices[ vertices[ 0 ][ x ] ].clone();
			nb = this.vertices[ vertices[ 0 ][ x + 1 ] ].clone();

		} else {

			na = this.vertices[ vertices[ 1 ][ x ] ].clone();
			nb = this.vertices[ vertices[ 1 ][ x + 1 ] ].clone();

		}

		na.setY( Math.sqrt( na.x * na.x + na.z * na.z ) * tanTheta ).normalize();
		nb.setY( Math.sqrt( nb.x * nb.x + nb.z * nb.z ) * tanTheta ).normalize();

		for ( y = 0; y < segmentsY; y ++ ) {

			var v1 = vertices[ y ][ x ];
			var v2 = vertices[ y + 1 ][ x ];
			var v3 = vertices[ y + 1 ][ x + 1 ];
			var v4 = vertices[ y ][ x + 1 ];

			var n1 = na.clone();
			var n2 = na.clone();
			var n3 = nb.clone();
			var n4 = nb.clone();

			var uv1 = uvs[ y ][ x ].clone();
			var uv2 = uvs[ y + 1 ][ x ].clone();
			var uv3 = uvs[ y + 1 ][ x + 1 ].clone();
			var uv4 = uvs[ y ][ x + 1 ].clone();

			this.faces.push( new THREE.Face4( v1, v2, v3, v4, [ n1, n2, n3, n4 ] ) );
			this.faceVertexUvs[ 0 ].push( [ uv1, uv2, uv3, uv4 ] );

		}

	}

	// top cap

	if ( !openEnded && radiusTop > 0 ) {

		this.vertices.push( new THREE.Vector3( 0, heightHalf, 0 ) );

		for ( x = 0; x < segmentsX; x ++ ) {

			var v1 = vertices[ 0 ][ x ];
			var v2 = vertices[ 0 ][ x + 1 ];
			var v3 = this.vertices.length - 1;

			var n1 = new THREE.Vector3( 0, 1, 0 );
			var n2 = new THREE.Vector3( 0, 1, 0 );
			var n3 = new THREE.Vector3( 0, 1, 0 );

			var uv1 = uvs[ 0 ][ x ].clone();
			var uv2 = uvs[ 0 ][ x + 1 ].clone();
			var uv3 = new THREE.UV( uv2.u, 0 );

			this.faces.push( new THREE.Face3( v1, v2, v3, [ n1, n2, n3 ] ) );
			this.faceVertexUvs[ 0 ].push( [ uv1, uv2, uv3 ] );

		}

	}

	// bottom cap

	if ( !openEnded && radiusBottom > 0 ) {

		this.vertices.push( new THREE.Vector3( 0, - heightHalf, 0 ) );

		for ( x = 0; x < segmentsX; x ++ ) {

			var v1 = vertices[ y ][ x + 1 ];
			var v2 = vertices[ y ][ x ];
			var v3 = this.vertices.length - 1;

			var n1 = new THREE.Vector3( 0, - 1, 0 );
			var n2 = new THREE.Vector3( 0, - 1, 0 );
			var n3 = new THREE.Vector3( 0, - 1, 0 );

			var uv1 = uvs[ y ][ x + 1 ].clone();
			var uv2 = uvs[ y ][ x ].clone();
			var uv3 = new THREE.UV( uv2.u, 1 );

			this.faces.push( new THREE.Face3( v1, v2, v3, [ n1, n2, n3 ] ) );
			this.faceVertexUvs[ 0 ].push( [ uv1, uv2, uv3 ] );

		}

	}

	this.computeCentroids();
	this.computeFaceNormals();

}

THREE.CylinderGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author zz85 / http://www.lab4games.net/zz85/blog
 *
 * Creates extruded geometry from a path shape.
 *
 * parameters = {
 *
 *  size: <float>, // size of the text
 *  height: <float>, // thickness to extrude text
 *  curveSegments: <int>, // number of points on the curves
 *  steps: <int>, // number of points for z-side extrusions / used for subdividing segements of extrude spline too
 *  amount: <int>, // Amount
 *
 *  bevelEnabled: <bool>, // turn on bevel
 *  bevelThickness: <float>, // how deep into text bevel goes
 *  bevelSize: <float>, // how far from text outline is bevel
 *  bevelSegments: <int>, // number of bevel layers
 *
 *  extrudePath: <THREE.CurvePath> // 3d spline path to extrude shape along. (creates Frames if .frames aren't defined)
 *  frames: <THREE.TubeGeometry.FrenetFrames> // containing arrays of tangents, normals, binormals
 *
 *  material: <int> // material index for front and back faces
 *  extrudeMaterial: <int> // material index for extrusion and beveled faces
 *  uvGenerator: <Object> // object that provides UV generator functions
 *
 * }
 **/

THREE.ExtrudeGeometry = function ( shapes, options ) {

	if ( typeof( shapes ) === "undefined" ) {
		shapes = [];
		return;
	}

	THREE.Geometry.call( this );

	shapes = shapes instanceof Array ? shapes : [ shapes ];

	this.shapebb = shapes[ shapes.length - 1 ].getBoundingBox();

	this.addShapeList( shapes, options );

	this.computeCentroids();
	this.computeFaceNormals();

	// can't really use automatic vertex normals
	// as then front and back sides get smoothed too
	// should do separate smoothing just for sides

	//this.computeVertexNormals();

	//console.log( "took", ( Date.now() - startTime ) );

};

THREE.ExtrudeGeometry.prototype = Object.create( THREE.Geometry.prototype );

THREE.ExtrudeGeometry.prototype.addShapeList = function ( shapes, options ) {
	var sl = shapes.length;

	for ( var s = 0; s < sl; s ++ ) {
		var shape = shapes[ s ];
		this.addShape( shape, options );
	}
};

THREE.ExtrudeGeometry.prototype.addShape = function ( shape, options ) {

	var amount = options.amount !== undefined ? options.amount : 100;

	var bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6; // 10
	var bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2; // 8
	var bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;

	var bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true; // false

	var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;

	var steps = options.steps !== undefined ? options.steps : 1;

	var extrudePath = options.extrudePath;
	var extrudePts, extrudeByPath = false;

	var material = options.material;
	var extrudeMaterial = options.extrudeMaterial;

	// Use default WorldUVGenerator if no UV generators are specified.
	var uvgen = options.UVGenerator !== undefined ? options.UVGenerator : THREE.ExtrudeGeometry.WorldUVGenerator;

	var shapebb = this.shapebb;
	//shapebb = shape.getBoundingBox();



	var splineTube, binormal, normal, position2;
	if ( extrudePath ) {

		extrudePts = extrudePath.getSpacedPoints( steps );

		extrudeByPath = true;
		bevelEnabled = false; // bevels not supported for path extrusion

		// SETUP TNB variables

		// Reuse TNB from TubeGeomtry for now.
		// TODO1 - have a .isClosed in spline?

		splineTube = options.frames !== undefined ? options.frames : new THREE.TubeGeometry.FrenetFrames(extrudePath, steps, false);

		// console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);

		binormal = new THREE.Vector3();
		normal = new THREE.Vector3();
		position2 = new THREE.Vector3();

	}

	// Safeguards if bevels are not enabled

	if ( ! bevelEnabled ) {

		bevelSegments = 0;
		bevelThickness = 0;
		bevelSize = 0;

	}

	// Variables initalization

	var ahole, h, hl; // looping of holes
	var scope = this;
	var bevelPoints = [];

	var shapesOffset = this.vertices.length;

	var shapePoints = shape.extractPoints();

	var vertices = shapePoints.shape;
	var holes = shapePoints.holes;

	var reverse = !THREE.Shape.Utils.isClockWise( vertices ) ;

	if ( reverse ) {

		vertices = vertices.reverse();

		// Maybe we should also check if holes are in the opposite direction, just to be safe ...

		for ( h = 0, hl = holes.length; h < hl; h ++ ) {

			ahole = holes[ h ];

			if ( THREE.Shape.Utils.isClockWise( ahole ) ) {

				holes[ h ] = ahole.reverse();

			}

		}

		reverse = false; // If vertices are in order now, we shouldn't need to worry about them again (hopefully)!

	}


	var faces = THREE.Shape.Utils.triangulateShape ( vertices, holes );

	/* Vertices */

	var contour = vertices; // vertices has all points but contour has only points of circumference

	for ( h = 0, hl = holes.length;  h < hl; h ++ ) {

		ahole = holes[ h ];

		vertices = vertices.concat( ahole );

	}


	function scalePt2 ( pt, vec, size ) {

		if ( !vec ) console.log( "die" );

		return vec.clone().multiplyScalar( size ).addSelf( pt );

	}

	var b, bs, t, z,
		vert, vlen = vertices.length,
		face, flen = faces.length,
		cont, clen = contour.length;


	// Find directions for point movement

	var RAD_TO_DEGREES = 180 / Math.PI;


	function getBevelVec( pt_i, pt_j, pt_k ) {

		// Algorithm 2

		return getBevelVec2( pt_i, pt_j, pt_k );

	}

	function getBevelVec1( pt_i, pt_j, pt_k ) {

		var anglea = Math.atan2( pt_j.y - pt_i.y, pt_j.x - pt_i.x );
		var angleb = Math.atan2( pt_k.y - pt_i.y, pt_k.x - pt_i.x );

		if ( anglea > angleb ) {

			angleb += Math.PI * 2;

		}

		var anglec = ( anglea + angleb ) / 2;


		//console.log('angle1', anglea * RAD_TO_DEGREES,'angle2', angleb * RAD_TO_DEGREES, 'anglec', anglec *RAD_TO_DEGREES);

		var x = - Math.cos( anglec );
		var y = - Math.sin( anglec );

		var vec = new THREE.Vector2( x, y ); //.normalize();

		return vec;

	}

	function getBevelVec2( pt_i, pt_j, pt_k ) {

		var a = THREE.ExtrudeGeometry.__v1,
			b = THREE.ExtrudeGeometry.__v2,
			v_hat = THREE.ExtrudeGeometry.__v3,
			w_hat = THREE.ExtrudeGeometry.__v4,
			p = THREE.ExtrudeGeometry.__v5,
			q = THREE.ExtrudeGeometry.__v6,
			v, w,
			v_dot_w_hat, q_sub_p_dot_w_hat,
			s, intersection;

		// good reading for line-line intersection
		// http://sputsoft.com/blog/2010/03/line-line-intersection.html

		// define a as vector j->i
		// define b as vectot k->i

		a.set( pt_i.x - pt_j.x, pt_i.y - pt_j.y );
		b.set( pt_i.x - pt_k.x, pt_i.y - pt_k.y );

		// get unit vectors

		v = a.normalize();
		w = b.normalize();

		// normals from pt i

		v_hat.set( -v.y, v.x );
		w_hat.set( w.y, -w.x );

		// pts from i

		p.copy( pt_i ).addSelf( v_hat );
		q.copy( pt_i ).addSelf( w_hat );

		if ( p.equals( q ) ) {

			//console.log("Warning: lines are straight");
			return w_hat.clone();

		}

		// Points from j, k. helps prevents points cross overover most of the time

		p.copy( pt_j ).addSelf( v_hat );
		q.copy( pt_k ).addSelf( w_hat );

		v_dot_w_hat = v.dot( w_hat );
		q_sub_p_dot_w_hat = q.subSelf( p ).dot( w_hat );

		// We should not reach these conditions

		if ( v_dot_w_hat === 0 ) {

			console.log( "Either infinite or no solutions!" );

			if ( q_sub_p_dot_w_hat === 0 ) {

				console.log( "Its finite solutions." );

			} else {

				console.log( "Too bad, no solutions." );

			}

		}

		s = q_sub_p_dot_w_hat / v_dot_w_hat;

		if ( s < 0 ) {

			// in case of emergecy, revert to algorithm 1.

			return getBevelVec1( pt_i, pt_j, pt_k );

		}

		intersection = v.multiplyScalar( s ).addSelf( p );

		return intersection.subSelf( pt_i ).clone(); // Don't normalize!, otherwise sharp corners become ugly

	}

	var contourMovements = [];

	for ( var i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {

		if ( j === il ) j = 0;
		if ( k === il ) k = 0;

		//  (j)---(i)---(k)
		// console.log('i,j,k', i, j , k)

		var pt_i = contour[ i ];
		var pt_j = contour[ j ];
		var pt_k = contour[ k ];

		contourMovements[ i ]= getBevelVec( contour[ i ], contour[ j ], contour[ k ] );

	}

	var holesMovements = [], oneHoleMovements, verticesMovements = contourMovements.concat();

	for ( h = 0, hl = holes.length; h < hl; h ++ ) {

		ahole = holes[ h ];

		oneHoleMovements = [];

		for ( i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {

			if ( j === il ) j = 0;
			if ( k === il ) k = 0;

			//  (j)---(i)---(k)
			oneHoleMovements[ i ]= getBevelVec( ahole[ i ], ahole[ j ], ahole[ k ] );

		}

		holesMovements.push( oneHoleMovements );
		verticesMovements = verticesMovements.concat( oneHoleMovements );

	}


	// Loop bevelSegments, 1 for the front, 1 for the back

	for ( b = 0; b < bevelSegments; b ++ ) {
	//for ( b = bevelSegments; b > 0; b -- ) {

		t = b / bevelSegments;
		z = bevelThickness * ( 1 - t );

		//z = bevelThickness * t;
		bs = bevelSize * ( Math.sin ( t * Math.PI/2 ) ) ; // curved
		//bs = bevelSize * t ; // linear

		// contract shape

		for ( i = 0, il = contour.length; i < il; i ++ ) {

			vert = scalePt2( contour[ i ], contourMovements[ i ], bs );
			//vert = scalePt( contour[ i ], contourCentroid, bs, false );
			v( vert.x, vert.y,  - z );

		}

		// expand holes

		for ( h = 0, hl = holes.length; h < hl; h++ ) {

			ahole = holes[ h ];
			oneHoleMovements = holesMovements[ h ];

			for ( i = 0, il = ahole.length; i < il; i++ ) {

				vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );
				//vert = scalePt( ahole[ i ], holesCentroids[ h ], bs, true );

				v( vert.x, vert.y,  -z );

			}

		}

	}

	bs = bevelSize;

	// Back facing vertices

	for ( i = 0; i < vlen; i ++ ) {

		vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];

		if ( !extrudeByPath ) {

			v( vert.x, vert.y, 0 );

		} else {

			// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );

			normal.copy( splineTube.normals[0] ).multiplyScalar(vert.x);
			binormal.copy( splineTube.binormals[0] ).multiplyScalar(vert.y);

			position2.copy( extrudePts[0] ).addSelf(normal).addSelf(binormal);

			v( position2.x, position2.y, position2.z );

		}

	}

	// Add stepped vertices...
	// Including front facing vertices

	var s;

	for ( s = 1; s <= steps; s ++ ) {

		for ( i = 0; i < vlen; i ++ ) {

			vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];

			if ( !extrudeByPath ) {

				v( vert.x, vert.y, amount / steps * s );

			} else {

				// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );

				normal.copy( splineTube.normals[s] ).multiplyScalar( vert.x );
				binormal.copy( splineTube.binormals[s] ).multiplyScalar( vert.y );

				position2.copy( extrudePts[s] ).addSelf( normal ).addSelf( binormal );

				v( position2.x, position2.y, position2.z );

			}

		}

	}


	// Add bevel segments planes

	//for ( b = 1; b <= bevelSegments; b ++ ) {
	for ( b = bevelSegments - 1; b >= 0; b -- ) {

		t = b / bevelSegments;
		z = bevelThickness * ( 1 - t );
		//bs = bevelSize * ( 1-Math.sin ( ( 1 - t ) * Math.PI/2 ) );
		bs = bevelSize * Math.sin ( t * Math.PI/2 ) ;

		// contract shape

		for ( i = 0, il = contour.length; i < il; i ++ ) {

			vert = scalePt2( contour[ i ], contourMovements[ i ], bs );
			v( vert.x, vert.y,  amount + z );

		}

		// expand holes

		for ( h = 0, hl = holes.length; h < hl; h ++ ) {

			ahole = holes[ h ];
			oneHoleMovements = holesMovements[ h ];

			for ( i = 0, il = ahole.length; i < il; i ++ ) {

				vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );

				if ( !extrudeByPath ) {

					v( vert.x, vert.y,  amount + z );

				} else {

					v( vert.x, vert.y + extrudePts[ steps - 1 ].y, extrudePts[ steps - 1 ].x + z );

				}

			}

		}

	}

	/* Faces */

	// Top and bottom faces

	buildLidFaces();

	// Sides faces

	buildSideFaces();


	/////  Internal functions

	function buildLidFaces() {

		if ( bevelEnabled ) {

			var layer = 0 ; // steps + 1
			var offset = vlen * layer;

			// Bottom faces

			for ( i = 0; i < flen; i ++ ) {

				face = faces[ i ];
				f3( face[ 2 ]+ offset, face[ 1 ]+ offset, face[ 0 ] + offset, true );

			}

			layer = steps + bevelSegments * 2;
			offset = vlen * layer;

			// Top faces

			for ( i = 0; i < flen; i ++ ) {

				face = faces[ i ];
				f3( face[ 0 ] + offset, face[ 1 ] + offset, face[ 2 ] + offset, false );

			}

		} else {

			// Bottom faces

			for ( i = 0; i < flen; i++ ) {

				face = faces[ i ];
				f3( face[ 2 ], face[ 1 ], face[ 0 ], true );

			}

			// Top faces

			for ( i = 0; i < flen; i ++ ) {

				face = faces[ i ];
				f3( face[ 0 ] + vlen * steps, face[ 1 ] + vlen * steps, face[ 2 ] + vlen * steps, false );

			}
		}

	}

	// Create faces for the z-sides of the shape

	function buildSideFaces() {

		var layeroffset = 0;
		sidewalls( contour, layeroffset );
		layeroffset += contour.length;

		for ( h = 0, hl = holes.length;  h < hl; h ++ ) {

			ahole = holes[ h ];
			sidewalls( ahole, layeroffset );

			//, true
			layeroffset += ahole.length;

		}

	}

	function sidewalls( contour, layeroffset ) {

		var j, k;
		i = contour.length;

		while ( --i >= 0 ) {

			j = i;
			k = i - 1;
			if ( k < 0 ) k = contour.length - 1;

			//console.log('b', i,j, i-1, k,vertices.length);

			var s = 0, sl = steps  + bevelSegments * 2;

			for ( s = 0; s < sl; s ++ ) {

				var slen1 = vlen * s;
				var slen2 = vlen * ( s + 1 );

				var a = layeroffset + j + slen1,
					b = layeroffset + k + slen1,
					c = layeroffset + k + slen2,
					d = layeroffset + j + slen2;

				f4( a, b, c, d, contour, s, sl, j, k );

			}
		}

	}


	function v( x, y, z ) {

		scope.vertices.push( new THREE.Vector3( x, y, z ) );

	}

	function f3( a, b, c, isBottom ) {

		a += shapesOffset;
		b += shapesOffset;
		c += shapesOffset;

		// normal, color, material
		scope.faces.push( new THREE.Face3( a, b, c, null, null, material ) );

		var uvs = isBottom ? uvgen.generateBottomUV( scope, shape, options, a, b, c ) : uvgen.generateTopUV( scope, shape, options, a, b, c );

 		scope.faceVertexUvs[ 0 ].push( uvs );

	}

	function f4( a, b, c, d, wallContour, stepIndex, stepsLength, contourIndex1, contourIndex2 ) {

		a += shapesOffset;
		b += shapesOffset;
		c += shapesOffset;
		d += shapesOffset;

 		scope.faces.push( new THREE.Face4( a, b, c, d, null, null, extrudeMaterial ) );

 		var uvs = uvgen.generateSideWallUV( scope, shape, wallContour, options, a, b, c, d,
 		                                    stepIndex, stepsLength, contourIndex1, contourIndex2 );
 		scope.faceVertexUvs[ 0 ].push( uvs );

	}

};

THREE.ExtrudeGeometry.WorldUVGenerator = {

	generateTopUV: function( geometry, extrudedShape, extrudeOptions, indexA, indexB, indexC ) {
		var ax = geometry.vertices[ indexA ].x,
			ay = geometry.vertices[ indexA ].y,

			bx = geometry.vertices[ indexB ].x,
			by = geometry.vertices[ indexB ].y,

			cx = geometry.vertices[ indexC ].x,
			cy = geometry.vertices[ indexC ].y;

		return [
			new THREE.UV( ax, ay ),
			new THREE.UV( bx, by ),
			new THREE.UV( cx, cy )
		];

	},

	generateBottomUV: function( geometry, extrudedShape, extrudeOptions, indexA, indexB, indexC ) {

		return this.generateTopUV( geometry, extrudedShape, extrudeOptions, indexA, indexB, indexC );

	},

	generateSideWallUV: function( geometry, extrudedShape, wallContour, extrudeOptions,
	                              indexA, indexB, indexC, indexD, stepIndex, stepsLength,
	                              contourIndex1, contourIndex2 ) {

		var ax = geometry.vertices[ indexA ].x,
			ay = geometry.vertices[ indexA ].y,
			az = geometry.vertices[ indexA ].z,

			bx = geometry.vertices[ indexB ].x,
			by = geometry.vertices[ indexB ].y,
			bz = geometry.vertices[ indexB ].z,

			cx = geometry.vertices[ indexC ].x,
			cy = geometry.vertices[ indexC ].y,
			cz = geometry.vertices[ indexC ].z,

			dx = geometry.vertices[ indexD ].x,
			dy = geometry.vertices[ indexD ].y,
			dz = geometry.vertices[ indexD ].z;

		if ( Math.abs( ay - by ) < 0.01 ) {
			return [
				new THREE.UV( ax, 1 - az ),
				new THREE.UV( bx, 1 - bz ),
				new THREE.UV( cx, 1 - cz ),
				new THREE.UV( dx, 1 - dz )
			];
		} else {
			return [
				new THREE.UV( ay, 1 - az ),
				new THREE.UV( by, 1 - bz ),
				new THREE.UV( cy, 1 - cz ),
				new THREE.UV( dy, 1 - dz )
			];
		}
	}
};

THREE.ExtrudeGeometry.__v1 = new THREE.Vector2();
THREE.ExtrudeGeometry.__v2 = new THREE.Vector2();
THREE.ExtrudeGeometry.__v3 = new THREE.Vector2();
THREE.ExtrudeGeometry.__v4 = new THREE.Vector2();
THREE.ExtrudeGeometry.__v5 = new THREE.Vector2();
THREE.ExtrudeGeometry.__v6 = new THREE.Vector2();
/**
 * @author jonobr1 / http://jonobr1.com
 *
 * Creates a one-sided polygonal geometry from a path shape. Similar to
 * ExtrudeGeometry.
 *
 * parameters = {
 *
 *	curveSegments: <int>, // number of points on the curves. NOT USED AT THE MOMENT.
 *
 *	material: <int> // material index for front and back faces
 *	uvGenerator: <Object> // object that provides UV generator functions
 *
 * }
 **/

THREE.ShapeGeometry = function ( shapes, options ) {

	THREE.Geometry.call( this );

	if ( shapes instanceof Array === false ) shapes = [ shapes ];

	this.shapebb = shapes[ shapes.length - 1 ].getBoundingBox();

	this.addShapeList( shapes, options );

	this.computeCentroids();
	this.computeFaceNormals();

};

THREE.ShapeGeometry.prototype = Object.create( THREE.Geometry.prototype );

/**
 * Add an array of shapes to THREE.ShapeGeometry.
 */
THREE.ShapeGeometry.prototype.addShapeList = function ( shapes, options ) {

	for ( var i = 0, l = shapes.length; i < l; i++ ) {

		this.addShape( shapes[ i ], options );

	}

	return this;

};

/**
 * Adds a shape to THREE.ShapeGeometry, based on THREE.ExtrudeGeometry.
 */
THREE.ShapeGeometry.prototype.addShape = function ( shape, options ) {

	if ( options === undefined ) options = {};

	var material = options.material;
	var uvgen = options.UVGenerator === undefined ? THREE.ExtrudeGeometry.WorldUVGenerator : options.UVGenerator;

	var shapebb = this.shapebb;

	//

	var i, l, hole, s;

	var shapesOffset = this.vertices.length;
	var shapePoints = shape.extractPoints();

	var vertices = shapePoints.shape;
	var holes = shapePoints.holes;

	var reverse = !THREE.Shape.Utils.isClockWise( vertices );

	if ( reverse ) {

		vertices = vertices.reverse();

		// Maybe we should also check if holes are in the opposite direction, just to be safe...

		for ( i = 0, l = holes.length; i < l; i++ ) {

			hole = holes[ i ];

			if ( THREE.Shape.Utils.isClockWise( hole ) ) {

				holes[ i ] = hole.reverse();

			}

		}

		reverse = false;

	}

	var faces = THREE.Shape.Utils.triangulateShape( vertices, holes );

	// Vertices

	var contour = vertices;

	for ( i = 0, l = holes.length; i < l; i++ ) {

		hole = holes[ i ];
		vertices = vertices.concat( hole );

	}

	//

	var vert, vlen = vertices.length;
	var face, flen = faces.length;
	var cont, clen = contour.length;

	for ( i = 0; i < vlen; i++ ) {

		vert = vertices[ i ];

		this.vertices.push( new THREE.Vector3( vert.x, vert.y, 0 ) );

	}

	for ( i = 0; i < flen; i++ ) {

		face = faces[ i ];

		var a = face[ 0 ] + shapesOffset;
		var b = face[ 1 ] + shapesOffset;
		var c = face[ 2 ] + shapesOffset;

		this.faces.push( new THREE.Face3( a, b, c, null, null, material ) );
		this.faceVertexUvs[ 0 ].push( uvgen.generateBottomUV( this, shape, options, a, b, c ) );

	}

};
/**
 * @author astrodud / http://astrodud.isgreat.org/
 * @author zz85 / https://github.com/zz85
 */

THREE.LatheGeometry = function ( points, steps, angle ) {

	THREE.Geometry.call( this );

	var _steps = steps || 12;
	var _angle = angle || 2 * Math.PI;

	var _newV = [];
	var _matrix = new THREE.Matrix4().makeRotationZ( _angle / _steps );

	for ( var j = 0; j < points.length; j ++ ) {

		_newV[ j ] = points[ j ].clone();
		this.vertices.push( _newV[ j ] );

	}

	var i, il = _steps + 1;

	for ( i = 0; i < il; i ++ ) {

		for ( var j = 0; j < _newV.length; j ++ ) {

			_newV[ j ] = _matrix.multiplyVector3( _newV[ j ].clone() );
			this.vertices.push( _newV[ j ] );

		}

	}

	for ( i = 0; i < _steps; i ++ ) {

		for ( var k = 0, kl = points.length; k < kl - 1; k ++ ) {

			var a = i * kl + k;
			var b = ( ( i + 1 ) % il ) * kl + k;
			var c = ( ( i + 1 ) % il ) * kl + ( k + 1 ) % kl;
			var d = i * kl + ( k + 1 ) % kl;

			this.faces.push( new THREE.Face4( a, b, c, d ) );

			this.faceVertexUvs[ 0 ].push( [

				new THREE.UV( 1 - i / _steps, k / kl ),
				new THREE.UV( 1 - ( i + 1 ) / _steps, k / kl ),
				new THREE.UV( 1 - ( i + 1 ) / _steps, ( k + 1 ) / kl ),
				new THREE.UV( 1 - i / _steps, ( k + 1 ) / kl )

			] );

		}

	}

	this.computeCentroids();
	this.computeFaceNormals();
	this.computeVertexNormals();

};

THREE.LatheGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author mrdoob / http://mrdoob.com/
 * based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Plane.as
 */

THREE.PlaneGeometry = function ( width, height, widthSegments, heightSegments ) {

	THREE.Geometry.call( this );

	this.width = width;
	this.height = height;

	this.widthSegments = widthSegments || 1;
	this.heightSegments = heightSegments || 1;

	var ix, iz;
	var width_half = width / 2;
	var height_half = height / 2;

	var gridX = this.widthSegments;
	var gridZ = this.heightSegments;

	var gridX1 = gridX + 1;
	var gridZ1 = gridZ + 1;

	var segment_width = this.width / gridX;
	var segment_height = this.height / gridZ;

	var normal = new THREE.Vector3( 0, 0, 1 );

	for ( iz = 0; iz < gridZ1; iz ++ ) {

		for ( ix = 0; ix < gridX1; ix ++ ) {

			var x = ix * segment_width - width_half;
			var y = iz * segment_height - height_half;

			this.vertices.push( new THREE.Vector3( x, - y, 0 ) );

		}

	}

	for ( iz = 0; iz < gridZ; iz ++ ) {

		for ( ix = 0; ix < gridX; ix ++ ) {

			var a = ix + gridX1 * iz;
			var b = ix + gridX1 * ( iz + 1 );
			var c = ( ix + 1 ) + gridX1 * ( iz + 1 );
			var d = ( ix + 1 ) + gridX1 * iz;

			var face = new THREE.Face4( a, b, c, d );
			face.normal.copy( normal );
			face.vertexNormals.push( normal.clone(), normal.clone(), normal.clone(), normal.clone() );

			this.faces.push( face );
			this.faceVertexUvs[ 0 ].push( [
				new THREE.UV( ix / gridX, 1 - iz / gridZ ),
				new THREE.UV( ix / gridX, 1 - ( iz + 1 ) / gridZ ),
				new THREE.UV( ( ix + 1 ) / gridX, 1 - ( iz + 1 ) / gridZ ),
				new THREE.UV( ( ix + 1 ) / gridX, 1 - iz / gridZ )
			] );

		}

	}

	this.computeCentroids();

};

THREE.PlaneGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.SphereGeometry = function ( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {

	THREE.Geometry.call( this );

	this.radius = radius || 50;

	this.widthSegments = Math.max( 3, Math.floor( widthSegments ) || 8 );
	this.heightSegments = Math.max( 2, Math.floor( heightSegments ) || 6 );

	phiStart = phiStart !== undefined ? phiStart : 0;
	phiLength = phiLength !== undefined ? phiLength : Math.PI * 2;

	thetaStart = thetaStart !== undefined ? thetaStart : 0;
	thetaLength = thetaLength !== undefined ? thetaLength : Math.PI;

	var x, y, vertices = [], uvs = [];

	for ( y = 0; y <= this.heightSegments; y ++ ) {

		var verticesRow = [];
		var uvsRow = [];

		for ( x = 0; x <= this.widthSegments; x ++ ) {

			var u = x / this.widthSegments;
			var v = y / this.heightSegments;

			var vertex = new THREE.Vector3();
			vertex.x = - this.radius * Math.cos( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );
			vertex.y = this.radius * Math.cos( thetaStart + v * thetaLength );
			vertex.z = this.radius * Math.sin( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );

			this.vertices.push( vertex );

			verticesRow.push( this.vertices.length - 1 );
			uvsRow.push( new THREE.UV( u, 1 - v ) );

		}

		vertices.push( verticesRow );
		uvs.push( uvsRow );

	}

	for ( y = 0; y < this.heightSegments; y ++ ) {

		for ( x = 0; x < this.widthSegments; x ++ ) {

			var v1 = vertices[ y ][ x + 1 ];
			var v2 = vertices[ y ][ x ];
			var v3 = vertices[ y + 1 ][ x ];
			var v4 = vertices[ y + 1 ][ x + 1 ];

			var n1 = this.vertices[ v1 ].clone().normalize();
			var n2 = this.vertices[ v2 ].clone().normalize();
			var n3 = this.vertices[ v3 ].clone().normalize();
			var n4 = this.vertices[ v4 ].clone().normalize();

			var uv1 = uvs[ y ][ x + 1 ].clone();
			var uv2 = uvs[ y ][ x ].clone();
			var uv3 = uvs[ y + 1 ][ x ].clone();
			var uv4 = uvs[ y + 1 ][ x + 1 ].clone();

			if ( Math.abs( this.vertices[ v1 ].y ) === this.radius ) {

				this.faces.push( new THREE.Face3( v1, v3, v4, [ n1, n3, n4 ] ) );
				this.faceVertexUvs[ 0 ].push( [ uv1, uv3, uv4 ] );

			} else if ( Math.abs( this.vertices[ v3 ].y ) === this.radius ) {

				this.faces.push( new THREE.Face3( v1, v2, v3, [ n1, n2, n3 ] ) );
				this.faceVertexUvs[ 0 ].push( [ uv1, uv2, uv3 ] );

			} else {

				this.faces.push( new THREE.Face4( v1, v2, v3, v4, [ n1, n2, n3, n4 ] ) );
				this.faceVertexUvs[ 0 ].push( [ uv1, uv2, uv3, uv4 ] );

			}

		}

	}

	this.computeCentroids();
	this.computeFaceNormals();

	this.boundingSphere = { radius: this.radius };

};

THREE.SphereGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author zz85 / http://www.lab4games.net/zz85/blog
 * @author alteredq / http://alteredqualia.com/
 *
 * For creating 3D text geometry in three.js
 *
 * Text = 3D Text
 *
 * parameters = {
 *  size: 			<float>, 	// size of the text
 *  height: 		<float>, 	// thickness to extrude text
 *  curveSegments: 	<int>,		// number of points on the curves
 *
 *  font: 			<string>,		// font name
 *  weight: 		<string>,		// font weight (normal, bold)
 *  style: 			<string>,		// font style  (normal, italics)
 *
 *  bevelEnabled:	<bool>,			// turn on bevel
 *  bevelThickness: <float>, 		// how deep into text bevel goes
 *  bevelSize:		<float>, 		// how far from text outline is bevel
 *  }
 *
 */

/*	Usage Examples

	// TextGeometry wrapper

	var text3d = new TextGeometry( text, options );

	// Complete manner

	var textShapes = THREE.FontUtils.generateShapes( text, options );
	var text3d = new ExtrudeGeometry( textShapes, options );

*/


THREE.TextGeometry = function ( text, parameters ) {

	var textShapes = THREE.FontUtils.generateShapes( text, parameters );

	// translate parameters to ExtrudeGeometry API

	parameters.amount = parameters.height !== undefined ? parameters.height : 50;

	// defaults

	if ( parameters.bevelThickness === undefined ) parameters.bevelThickness = 10;
	if ( parameters.bevelSize === undefined ) parameters.bevelSize = 8;
	if ( parameters.bevelEnabled === undefined ) parameters.bevelEnabled = false;

	THREE.ExtrudeGeometry.call( this, textShapes, parameters );

};

THREE.TextGeometry.prototype = Object.create( THREE.ExtrudeGeometry.prototype );
/**
 * @author oosmoxiecode
 * @author mrdoob / http://mrdoob.com/
 * based on http://code.google.com/p/away3d/source/browse/trunk/fp10/Away3DLite/src/away3dlite/primitives/Torus.as?r=2888
 */

THREE.TorusGeometry = function ( radius, tube, radialSegments, tubularSegments, arc ) {

	THREE.Geometry.call( this );

	var scope = this;

	this.radius = radius || 100;
	this.tube = tube || 40;
	this.radialSegments = radialSegments || 8;
	this.tubularSegments = tubularSegments || 6;
	this.arc = arc || Math.PI * 2;

	var center = new THREE.Vector3(), uvs = [], normals = [];

	for ( var j = 0; j <= this.radialSegments; j ++ ) {

		for ( var i = 0; i <= this.tubularSegments; i ++ ) {

			var u = i / this.tubularSegments * this.arc;
			var v = j / this.radialSegments * Math.PI * 2;

			center.x = this.radius * Math.cos( u );
			center.y = this.radius * Math.sin( u );

			var vertex = new THREE.Vector3();
			vertex.x = ( this.radius + this.tube * Math.cos( v ) ) * Math.cos( u );
			vertex.y = ( this.radius + this.tube * Math.cos( v ) ) * Math.sin( u );
			vertex.z = this.tube * Math.sin( v );

			this.vertices.push( vertex );

			uvs.push( new THREE.UV( i / this.tubularSegments, j / this.radialSegments ) );
			normals.push( vertex.clone().subSelf( center ).normalize() );

		}
	}


	for ( var j = 1; j <= this.radialSegments; j ++ ) {

		for ( var i = 1; i <= this.tubularSegments; i ++ ) {

			var a = ( this.tubularSegments + 1 ) * j + i - 1;
			var b = ( this.tubularSegments + 1 ) * ( j - 1 ) + i - 1;
			var c = ( this.tubularSegments + 1 ) * ( j - 1 ) + i;
			var d = ( this.tubularSegments + 1 ) * j + i;

			var face = new THREE.Face4( a, b, c, d, [ normals[ a ], normals[ b ], normals[ c ], normals[ d ] ] );
			face.normal.addSelf( normals[ a ] );
			face.normal.addSelf( normals[ b ] );
			face.normal.addSelf( normals[ c ] );
			face.normal.addSelf( normals[ d ] );
			face.normal.normalize();

			this.faces.push( face );

			this.faceVertexUvs[ 0 ].push( [ uvs[ a ].clone(), uvs[ b ].clone(), uvs[ c ].clone(), uvs[ d ].clone() ] );
		}

	}

	this.computeCentroids();

};

THREE.TorusGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author oosmoxiecode
 * based on http://code.google.com/p/away3d/source/browse/trunk/fp10/Away3D/src/away3d/primitives/TorusKnot.as?spec=svn2473&r=2473
 */

THREE.TorusKnotGeometry = function ( radius, tube, radialSegments, tubularSegments, p, q, heightScale ) {

	THREE.Geometry.call( this );

	var scope = this;

	this.radius = radius || 200;
	this.tube = tube || 40;
	this.radialSegments = radialSegments || 64;
	this.tubularSegments = tubularSegments || 8;
	this.p = p || 2;
	this.q = q || 3;
	this.heightScale = heightScale || 1;
	this.grid = new Array(this.radialSegments);

	var tang = new THREE.Vector3();
	var n = new THREE.Vector3();
	var bitan = new THREE.Vector3();

	for ( var i = 0; i < this.radialSegments; ++ i ) {

		this.grid[ i ] = new Array( this.tubularSegments );

		for ( var j = 0; j < this.tubularSegments; ++ j ) {

			var u = i / this.radialSegments * 2 * this.p * Math.PI;
			var v = j / this.tubularSegments * 2 * Math.PI;
			var p1 = getPos( u, v, this.q, this.p, this.radius, this.heightScale );
			var p2 = getPos( u + 0.01, v, this.q, this.p, this.radius, this.heightScale );
			var cx, cy;

			tang.sub( p2, p1 );
			n.add( p2, p1 );

			bitan.cross( tang, n );
			n.cross( bitan, tang );
			bitan.normalize();
			n.normalize();

			cx = - this.tube * Math.cos( v ); // TODO: Hack: Negating it so it faces outside.
			cy = this.tube * Math.sin( v );

			p1.x += cx * n.x + cy * bitan.x;
			p1.y += cx * n.y + cy * bitan.y;
			p1.z += cx * n.z + cy * bitan.z;

			this.grid[ i ][ j ] = vert( p1.x, p1.y, p1.z );

		}

	}

	for ( var i = 0; i < this.radialSegments; ++ i ) {

		for ( var j = 0; j < this.tubularSegments; ++ j ) {

			var ip = ( i + 1 ) % this.radialSegments;
			var jp = ( j + 1 ) % this.tubularSegments;

			var a = this.grid[ i ][ j ];
			var b = this.grid[ ip ][ j ];
			var c = this.grid[ ip ][ jp ];
			var d = this.grid[ i ][ jp ];

			var uva = new THREE.UV( i / this.radialSegments, j / this.tubularSegments );
			var uvb = new THREE.UV( ( i + 1 ) / this.radialSegments, j / this.tubularSegments );
			var uvc = new THREE.UV( ( i + 1 ) / this.radialSegments, ( j + 1 ) / this.tubularSegments );
			var uvd = new THREE.UV( i / this.radialSegments, ( j + 1 ) / this.tubularSegments );

			this.faces.push( new THREE.Face4( a, b, c, d ) );
			this.faceVertexUvs[ 0 ].push( [ uva,uvb,uvc, uvd ] );

		}
	}

	this.computeCentroids();
	this.computeFaceNormals();
	this.computeVertexNormals();

	function vert( x, y, z ) {

		return scope.vertices.push( new THREE.Vector3( x, y, z ) ) - 1;

	}

	function getPos( u, v, in_q, in_p, radius, heightScale ) {

		var cu = Math.cos( u );
		var cv = Math.cos( v );
		var su = Math.sin( u );
		var quOverP = in_q / in_p * u;
		var cs = Math.cos( quOverP );

		var tx = radius * ( 2 + cs ) * 0.5 * cu;
		var ty = radius * ( 2 + cs ) * su * 0.5;
		var tz = heightScale * radius * Math.sin( quOverP ) * 0.5;

		return new THREE.Vector3( tx, ty, tz );

	}

};

THREE.TorusKnotGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author WestLangley / https://github.com/WestLangley
 * @author zz85 / https://github.com/zz85
 * @author miningold / https://github.com/miningold
 *
 * Modified from the TorusKnotGeometry by @oosmoxiecode
 *
 * Creates a tube which extrudes along a 3d spline
 *
 * Uses parallel transport frames as described in
 * http://www.cs.indiana.edu/pub/techreports/TR425.pdf
 */

THREE.TubeGeometry = function( path, segments, radius, radiusSegments, closed, debug ) {

	THREE.Geometry.call( this );

	this.path = path;
	this.segments = segments || 64;
	this.radius = radius || 1;
	this.radiusSegments = radiusSegments || 8;
	this.closed = closed || false;

	if ( debug ) this.debug = new THREE.Object3D();

	this.grid = [];

	var scope = this,

		tangent,
		normal,
		binormal,

		numpoints = this.segments + 1,

		x, y, z,
		tx, ty, tz,
		u, v,

		cx, cy,
		pos, pos2 = new THREE.Vector3(),
		i, j,
		ip, jp,
		a, b, c, d,
		uva, uvb, uvc, uvd;

	var frames = new THREE.TubeGeometry.FrenetFrames(path, segments, closed),
		tangents = frames.tangents,
		normals = frames.normals,
		binormals = frames.binormals;

	// proxy internals
	this.tangents = tangents;
	this.normals = normals;
	this.binormals = binormals;

	function vert( x, y, z ) {

		return scope.vertices.push( new THREE.Vector3( x, y, z ) ) - 1;

	}


	// consruct the grid

	for ( i = 0; i < numpoints; i++ ) {

		this.grid[ i ] = [];

		u = i / ( numpoints - 1 );

		pos = path.getPointAt( u );

		tangent = tangents[ i ];
		normal = normals[ i ];
		binormal = binormals[ i ];

		if ( this.debug ) {

			this.debug.add( new THREE.ArrowHelper(tangent, pos, radius, 0x0000ff ) );
			this.debug.add( new THREE.ArrowHelper(normal, pos, radius, 0xff0000 ) );
			this.debug.add( new THREE.ArrowHelper(binormal, pos, radius, 0x00ff00 ) );

		}

		for ( j = 0; j < this.radiusSegments; j++ ) {

			v = j / this.radiusSegments * 2 * Math.PI;

			cx = -this.radius * Math.cos( v ); // TODO: Hack: Negating it so it faces outside.
			cy = this.radius * Math.sin( v );

			pos2.copy( pos );
			pos2.x += cx * normal.x + cy * binormal.x;
			pos2.y += cx * normal.y + cy * binormal.y;
			pos2.z += cx * normal.z + cy * binormal.z;

			this.grid[ i ][ j ] = vert( pos2.x, pos2.y, pos2.z );

		}
	}


	// construct the mesh

	for ( i = 0; i < this.segments; i++ ) {

		for ( j = 0; j < this.radiusSegments; j++ ) {

			ip = ( closed ) ? (i + 1) % this.segments : i + 1;
			jp = (j + 1) % this.radiusSegments;

			a = this.grid[ i ][ j ];		// *** NOT NECESSARILY PLANAR ! ***
			b = this.grid[ ip ][ j ];
			c = this.grid[ ip ][ jp ];
			d = this.grid[ i ][ jp ];

			uva = new THREE.UV( i / this.segments, j / this.radiusSegments );
			uvb = new THREE.UV( ( i + 1 ) / this.segments, j / this.radiusSegments );
			uvc = new THREE.UV( ( i + 1 ) / this.segments, ( j + 1 ) / this.radiusSegments );
			uvd = new THREE.UV( i / this.segments, ( j + 1 ) / this.radiusSegments );

			this.faces.push( new THREE.Face4( a, b, c, d ) );
			this.faceVertexUvs[ 0 ].push( [ uva, uvb, uvc, uvd ] );

		}
	}

	this.computeCentroids();
	this.computeFaceNormals();
	this.computeVertexNormals();

};

THREE.TubeGeometry.prototype = Object.create( THREE.Geometry.prototype );


// For computing of Frenet frames, exposing the tangents, normals and binormals the spline
THREE.TubeGeometry.FrenetFrames = function(path, segments, closed) {

	var
		tangent = new THREE.Vector3(),
		normal = new THREE.Vector3(),
		binormal = new THREE.Vector3(),

		tangents = [],
		normals = [],
		binormals = [],

		vec = new THREE.Vector3(),
		mat = new THREE.Matrix4(),

		numpoints = segments + 1,
		theta,
		epsilon = 0.0001,
		smallest,

		tx, ty, tz,
		i, u, v;


	// expose internals
	this.tangents = tangents;
	this.normals = normals;
	this.binormals = binormals;

	// compute the tangent vectors for each segment on the path

	for ( i = 0; i < numpoints; i++ ) {

		u = i / ( numpoints - 1 );

		tangents[ i ] = path.getTangentAt( u );
		tangents[ i ].normalize();

	}

	initialNormal3();

	function initialNormal1(lastBinormal) {
		// fixed start binormal. Has dangers of 0 vectors
		normals[ 0 ] = new THREE.Vector3();
		binormals[ 0 ] = new THREE.Vector3();
		if (lastBinormal===undefined) lastBinormal = new THREE.Vector3( 0, 0, 1 );
		normals[ 0 ].cross( lastBinormal, tangents[ 0 ] ).normalize();
		binormals[ 0 ].cross( tangents[ 0 ], normals[ 0 ] ).normalize();
	}

	function initialNormal2() {

		// This uses the Frenet-Serret formula for deriving binormal
		var t2 = path.getTangentAt( epsilon );

		normals[ 0 ] = new THREE.Vector3().sub( t2, tangents[ 0 ] ).normalize();
		binormals[ 0 ] = new THREE.Vector3().cross( tangents[ 0 ], normals[ 0 ] );

		normals[ 0 ].cross( binormals[ 0 ], tangents[ 0 ] ).normalize(); // last binormal x tangent
		binormals[ 0 ].cross( tangents[ 0 ], normals[ 0 ] ).normalize();

	}

	function initialNormal3() {
		// select an initial normal vector perpenicular to the first tangent vector,
		// and in the direction of the smallest tangent xyz component

		normals[ 0 ] = new THREE.Vector3();
		binormals[ 0 ] = new THREE.Vector3();
		smallest = Number.MAX_VALUE;
		tx = Math.abs( tangents[ 0 ].x );
		ty = Math.abs( tangents[ 0 ].y );
		tz = Math.abs( tangents[ 0 ].z );

		if ( tx <= smallest ) {
			smallest = tx;
			normal.set( 1, 0, 0 );
		}

		if ( ty <= smallest ) {
			smallest = ty;
			normal.set( 0, 1, 0 );
		}

		if ( tz <= smallest ) {
			normal.set( 0, 0, 1 );
		}

		vec.cross( tangents[ 0 ], normal ).normalize();

		normals[ 0 ].cross( tangents[ 0 ], vec );
		binormals[ 0 ].cross( tangents[ 0 ], normals[ 0 ] );
	}


	// compute the slowly-varying normal and binormal vectors for each segment on the path

	for ( i = 1; i < numpoints; i++ ) {

		normals[ i ] = normals[ i-1 ].clone();

		binormals[ i ] = binormals[ i-1 ].clone();

		vec.cross( tangents[ i-1 ], tangents[ i ] );

		if ( vec.length() > epsilon ) {

			vec.normalize();

			theta = Math.acos( tangents[ i-1 ].dot( tangents[ i ] ) );

			mat.makeRotationAxis( vec, theta ).multiplyVector3( normals[ i ] );

		}

		binormals[ i ].cross( tangents[ i ], normals[ i ] );

	}


	// if the curve is closed, postprocess the vectors so the first and last normal vectors are the same

	if ( closed ) {

		theta = Math.acos( normals[ 0 ].dot( normals[ numpoints-1 ] ) );
		theta /= ( numpoints - 1 );

		if ( tangents[ 0 ].dot( vec.cross( normals[ 0 ], normals[ numpoints-1 ] ) ) > 0 ) {

			theta = -theta;

		}

		for ( i = 1; i < numpoints; i++ ) {

			// twist a little...
			mat.makeRotationAxis( tangents[ i ], theta * i ).multiplyVector3( normals[ i ] );
			binormals[ i ].cross( tangents[ i ], normals[ i ] );

		}

	}
};
/**
 * @author clockworkgeek / https://github.com/clockworkgeek
 * @author timothypratley / https://github.com/timothypratley
 */

THREE.PolyhedronGeometry = function ( vertices, faces, radius, detail ) {

	THREE.Geometry.call( this );

	radius = radius || 1;
	detail = detail || 0;

	var that = this;

	for ( var i = 0, l = vertices.length; i < l; i ++ ) {

		prepare( new THREE.Vector3( vertices[ i ][ 0 ], vertices[ i ][ 1 ], vertices[ i ][ 2 ] ) );

	}

	var midpoints = [], p = this.vertices;

	for ( var i = 0, l = faces.length; i < l; i ++ ) {

		make( p[ faces[ i ][ 0 ] ], p[ faces[ i ][ 1 ] ], p[ faces[ i ][ 2 ] ], detail );

	}

	this.mergeVertices();

	// Apply radius

	for ( var i = 0, l = this.vertices.length; i < l; i ++ ) {

		this.vertices[ i ].multiplyScalar( radius );

	}


	// Project vector onto sphere's surface

	function prepare( vector ) {

		var vertex = vector.normalize().clone();
		vertex.index = that.vertices.push( vertex ) - 1;

		// Texture coords are equivalent to map coords, calculate angle and convert to fraction of a circle.

		var u = azimuth( vector ) / 2 / Math.PI + 0.5;
		var v = inclination( vector ) / Math.PI + 0.5;
		vertex.uv = new THREE.UV( u, 1 - v );

		return vertex;

	}


	// Approximate a curved face with recursively sub-divided triangles.

	function make( v1, v2, v3, detail ) {

		if ( detail < 1 ) {

			var face = new THREE.Face3( v1.index, v2.index, v3.index, [ v1.clone(), v2.clone(), v3.clone() ] );
			face.centroid.addSelf( v1 ).addSelf( v2 ).addSelf( v3 ).divideScalar( 3 );
			face.normal = face.centroid.clone().normalize();
			that.faces.push( face );

			var azi = azimuth( face.centroid );
			that.faceVertexUvs[ 0 ].push( [
				correctUV( v1.uv, v1, azi ),
				correctUV( v2.uv, v2, azi ),
				correctUV( v3.uv, v3, azi )
			] );

		} else {

			detail -= 1;

			// split triangle into 4 smaller triangles

			make( v1, midpoint( v1, v2 ), midpoint( v1, v3 ), detail ); // top quadrant
			make( midpoint( v1, v2 ), v2, midpoint( v2, v3 ), detail ); // left quadrant
			make( midpoint( v1, v3 ), midpoint( v2, v3 ), v3, detail ); // right quadrant
			make( midpoint( v1, v2 ), midpoint( v2, v3 ), midpoint( v1, v3 ), detail ); // center quadrant

		}

	}

	function midpoint( v1, v2 ) {

		if ( !midpoints[ v1.index ] ) midpoints[ v1.index ] = [];
		if ( !midpoints[ v2.index ] ) midpoints[ v2.index ] = [];

		var mid = midpoints[ v1.index ][ v2.index ];

		if ( mid === undefined ) {

			// generate mean point and project to surface with prepare()

			midpoints[ v1.index ][ v2.index ] = midpoints[ v2.index ][ v1.index ] = mid = prepare(
				new THREE.Vector3().add( v1, v2 ).divideScalar( 2 )
			);
		}

		return mid;

	}


	// Angle around the Y axis, counter-clockwise when looking from above.

	function azimuth( vector ) {

		return Math.atan2( vector.z, -vector.x );

	}


	// Angle above the XZ plane.

	function inclination( vector ) {

		return Math.atan2( -vector.y, Math.sqrt( ( vector.x * vector.x ) + ( vector.z * vector.z ) ) );

	}


	// Texture fixing helper. Spheres have some odd behaviours.

	function correctUV( uv, vector, azimuth ) {

		if ( ( azimuth < 0 ) && ( uv.u === 1 ) ) uv = new THREE.UV( uv.u - 1, uv.v );
		if ( ( vector.x === 0 ) && ( vector.z === 0 ) ) uv = new THREE.UV( azimuth / 2 / Math.PI + 0.5, uv.v );
		return uv;

	}

	this.computeCentroids();

	this.boundingSphere = { radius: radius };

};

THREE.PolyhedronGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author timothypratley / https://github.com/timothypratley
 */

THREE.IcosahedronGeometry = function ( radius, detail ) {

	var t = ( 1 + Math.sqrt( 5 ) ) / 2;

	var vertices = [
		[ -1,  t,  0 ], [  1, t, 0 ], [ -1, -t,  0 ], [  1, -t,  0 ],
		[  0, -1,  t ], [  0, 1, t ], [  0, -1, -t ], [  0,  1, -t ],
		[  t,  0, -1 ], [  t, 0, 1 ], [ -t,  0, -1 ], [ -t,  0,  1 ]
	];

	var faces = [
		[ 0, 11,  5 ], [ 0,  5,  1 ], [  0,  1,  7 ], [  0,  7, 10 ], [  0, 10, 11 ],
		[ 1,  5,  9 ], [ 5, 11,  4 ], [ 11, 10,  2 ], [ 10,  7,  6 ], [  7,  1,  8 ],
		[ 3,  9,  4 ], [ 3,  4,  2 ], [  3,  2,  6 ], [  3,  6,  8 ], [  3,  8,  9 ],
		[ 4,  9,  5 ], [ 2,  4, 11 ], [  6,  2, 10 ], [  8,  6,  7 ], [  9,  8,  1 ]
	];

	THREE.PolyhedronGeometry.call( this, vertices, faces, radius, detail );

};

THREE.IcosahedronGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author timothypratley / https://github.com/timothypratley
 */

THREE.OctahedronGeometry = function ( radius, detail ) {

	var vertices = [
		[ 1, 0, 0 ], [ -1, 0, 0 ], [ 0, 1, 0 ], [ 0, -1, 0 ], [ 0, 0, 1 ], [ 0, 0, -1 ]
	];

	var faces = [
		[ 0, 2, 4 ], [ 0, 4, 3 ], [ 0, 3, 5 ], [ 0, 5, 2 ], [ 1, 2, 5 ], [ 1, 5, 3 ], [ 1, 3, 4 ], [ 1, 4, 2 ]
	];

	THREE.PolyhedronGeometry.call( this, vertices, faces, radius, detail );
};

THREE.OctahedronGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author timothypratley / https://github.com/timothypratley
 */

THREE.TetrahedronGeometry = function ( radius, detail ) {

	var vertices = [
		[ 1,  1,  1 ], [ -1, -1, 1 ], [ -1, 1, -1 ], [ 1, -1, -1 ]
	];

	var faces = [
		[ 2, 1, 0 ], [ 0, 3, 2 ], [ 1, 3, 0 ], [ 2, 3, 1 ]
	];

	THREE.PolyhedronGeometry.call( this, vertices, faces, radius, detail );

};

THREE.TetrahedronGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author zz85 / https://github.com/zz85
 * Parametric Surfaces Geometry
 * based on the brilliant article by @prideout http://prideout.net/blog/?p=44
 *
 * new THREE.ParametricGeometry( parametricFunction, uSegments, ySegements, useTris );
 *
 */

THREE.ParametricGeometry = function ( func, slices, stacks, useTris ) {

	THREE.Geometry.call( this );

	var verts = this.vertices;
	var faces = this.faces;
	var uvs = this.faceVertexUvs[ 0 ];

	useTris = (useTris === undefined) ? false : useTris;

	var i, il, j, p;
	var u, v;

	var stackCount = stacks + 1;
	var sliceCount = slices + 1;

	for ( i = 0; i <= stacks; i ++ ) {

		v = i / stacks;

		for ( j = 0; j <= slices; j ++ ) {

			u = j / slices;

			p = func( u, v );
			verts.push( p );

		}
	}

	var a, b, c, d;
	var uva, uvb, uvc, uvd;

	for ( i = 0; i < stacks; i ++ ) {

		for ( j = 0; j < slices; j ++ ) {

			a = i * sliceCount + j;
			b = i * sliceCount + j + 1;
			c = (i + 1) * sliceCount + j;
			d = (i + 1) * sliceCount + j + 1;

			uva = new THREE.UV( j / slices, i / stacks );
			uvb = new THREE.UV( ( j + 1 ) / slices, i / stacks );
			uvc = new THREE.UV( j / slices, ( i + 1 ) / stacks );
			uvd = new THREE.UV( ( j + 1 ) / slices, ( i + 1 ) / stacks );

			if ( useTris ) {

				faces.push( new THREE.Face3( a, b, c ) );
				faces.push( new THREE.Face3( b, d, c ) );

				uvs.push( [ uva, uvb, uvc ] );
				uvs.push( [ uvb, uvd, uvc ] );

			} else {

				faces.push( new THREE.Face4( a, b, d, c ) );
				uvs.push( [ uva, uvb, uvd, uvc ] );

			}

		}

	}

	// console.log(this);

	// magic bullet
	// var diff = this.mergeVertices();
	// console.log('removed ', diff, ' vertices by merging');

	this.computeCentroids();
	this.computeFaceNormals();
	this.computeVertexNormals();

};

THREE.ParametricGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author qiao / https://github.com/qiao
 * @fileoverview This is a convex hull generator using the incremental method.
 * The complexity is O(n^2) where n is the number of vertices.
 * O(nlogn) algorithms do exist, but they are much more complicated.
 *
 * Benchmark:
 *
 *  Platform: CPU: P7350 @2.00GHz Engine: V8
 *
 *  Num Vertices	Time(ms)
 *
 *     10           1
 *     20           3
 *     30           19
 *     40           48
 *     50           107
 */

THREE.ConvexGeometry = function( vertices ) {

	THREE.Geometry.call( this );

	var faces = [ [ 0, 1, 2 ], [ 0, 2, 1 ] ];

	for ( var i = 3; i < vertices.length; i++ ) {

		addPoint( i );

	}


	function addPoint( vertexId ) {

		var vertex = vertices[ vertexId ].clone();

		var mag = vertex.length();
		vertex.x += mag * randomOffset();
		vertex.y += mag * randomOffset();
		vertex.z += mag * randomOffset();

		var hole = [];

		for ( var f = 0; f < faces.length; ) {

			var face = faces[ f ];

			// for each face, if the vertex can see it,
			// then we try to add the face's edges into the hole.
			if ( visible( face, vertex ) ) {

				for ( var e = 0; e < 3; e++ ) {

					var edge = [ face[ e ], face[ ( e + 1 ) % 3 ] ];
					var boundary = true;

					// remove duplicated edges.
					for ( var h = 0; h < hole.length; h++ ) {

						if ( equalEdge( hole[ h ], edge ) ) {

							hole[ h ] = hole[ hole.length - 1 ];
							hole.pop();
							boundary = false;
							break;

						}

					}

					if ( boundary ) {

						hole.push( edge );

					}

				}

				// remove faces[ f ]
				faces[ f ] = faces[ faces.length - 1 ];
				faces.pop();

			} else { // not visible

				f++;

			}
		}

		// construct the new faces formed by the edges of the hole and the vertex
		for ( var h = 0; h < hole.length; h++ ) {

			faces.push( [
				hole[ h ][ 0 ],
				hole[ h ][ 1 ],
				vertexId
			] );

		}
	}

	/**
	 * Whether the face is visible from the vertex
	 */
	function visible( face, vertex ) {

		var va = vertices[ face[ 0 ] ];
		var vb = vertices[ face[ 1 ] ];
		var vc = vertices[ face[ 2 ] ];

		var n = normal( va, vb, vc );

		// distance from face to origin
		var dist = n.dot( va );

		return n.dot( vertex ) >= dist;

	}

	/**
	 * Face normal
	 */
	function normal( va, vb, vc ) {

		var cb = new THREE.Vector3();
		var ab = new THREE.Vector3();

		cb.sub( vc, vb );
		ab.sub( va, vb );
		cb.crossSelf( ab );

		cb.normalize();

		return cb;

	}

	/**
	 * Detect whether two edges are equal.
	 * Note that when constructing the convex hull, two same edges can only
	 * be of the negative direction.
	 */
	function equalEdge( ea, eb ) {

		return ea[ 0 ] === eb[ 1 ] && ea[ 1 ] === eb[ 0 ];

	}

	/**
	 * Create a random offset between -1e-6 and 1e-6.
	 */
	function randomOffset() {

		return ( Math.random() - 0.5 ) * 2 * 1e-6;

	}


	/**
	 * XXX: Not sure if this is the correct approach. Need someone to review.
	 */
	function vertexUv( vertex ) {

		var mag = vertex.length();
		return new THREE.UV( vertex.x / mag, vertex.y / mag );

	}

	// Push vertices into `this.vertices`, skipping those inside the hull
	var id = 0;
	var newId = new Array( vertices.length ); // map from old vertex id to new id

	for ( var i = 0; i < faces.length; i++ ) {

		 var face = faces[ i ];

		 for ( var j = 0; j < 3; j++ ) {

				if ( newId[ face[ j ] ] === undefined ) {

						newId[ face[ j ] ] = id++;
						this.vertices.push( vertices[ face[ j ] ] );

				}

				face[ j ] = newId[ face[ j ] ];

		 }

	}

	// Convert faces into instances of THREE.Face3
	for ( var i = 0; i < faces.length; i++ ) {

		this.faces.push( new THREE.Face3(
				faces[ i ][ 0 ],
				faces[ i ][ 1 ],
				faces[ i ][ 2 ]
		) );

	}

	// Compute UVs
	for ( var i = 0; i < this.faces.length; i++ ) {

		var face = this.faces[ i ];

		this.faceVertexUvs[ 0 ].push( [
			vertexUv( this.vertices[ face.a ] ),
			vertexUv( this.vertices[ face.b ] ),
			vertexUv( this.vertices[ face.c ])
		] );

	}


	this.computeCentroids();
	this.computeFaceNormals();
	this.computeVertexNormals();

};

THREE.ConvexGeometry.prototype = Object.create( THREE.Geometry.prototype );
/**
 * @author sroucheray / http://sroucheray.org/
 * @author mrdoob / http://mrdoob.com/
 */

THREE.AxisHelper = function ( size ) {

	var geometry = new THREE.Geometry();

	geometry.vertices.push(
		new THREE.Vector3(), new THREE.Vector3( size || 1, 0, 0 ),
		new THREE.Vector3(), new THREE.Vector3( 0, size || 1, 0 ),
		new THREE.Vector3(), new THREE.Vector3( 0, 0, size || 1 )
	);

	geometry.colors.push(
		new THREE.Color( 0xff0000 ), new THREE.Color( 0xffaa00 ),
		new THREE.Color( 0x00ff00 ), new THREE.Color( 0xaaff00 ),
		new THREE.Color( 0x0000ff ), new THREE.Color( 0x00aaff )
	);

	var material = new THREE.LineBasicMaterial( { vertexColors: THREE.VertexColors } );

	THREE.Line.call( this, geometry, material, THREE.LinePieces );

};

THREE.AxisHelper.prototype = Object.create( THREE.Line.prototype );
/**
 * @author WestLangley / http://github.com/WestLangley
 * @author zz85 / https://github.com/zz85
 *
 * Creates an arrow for visualizing directions
 *
 * Parameters:
 *  dir - Vector3
 *  origin - Vector3
 *  length - Number
 *  hex - color in hex value
 */

THREE.ArrowHelper = function ( dir, origin, length, hex ) {

	THREE.Object3D.call( this );

	if ( hex === undefined ) hex = 0xffff00;
	if ( length === undefined ) length = 20;

	var lineGeometry = new THREE.Geometry();
	lineGeometry.vertices.push( new THREE.Vector3( 0, 0, 0 ) );
	lineGeometry.vertices.push( new THREE.Vector3( 0, 1, 0 ) );

	this.line = new THREE.Line( lineGeometry, new THREE.LineBasicMaterial( { color: hex } ) );
	this.add( this.line );

	var coneGeometry = new THREE.CylinderGeometry( 0, 0.05, 0.25, 5, 1 );

	this.cone = new THREE.Mesh( coneGeometry, new THREE.MeshBasicMaterial( { color: hex } ) );
	this.cone.position.set( 0, 1, 0 );
	this.add( this.cone );

	if ( origin instanceof THREE.Vector3 ) this.position = origin;

	this.setDirection( dir );
	this.setLength( length );

};

THREE.ArrowHelper.prototype = Object.create( THREE.Object3D.prototype );

THREE.ArrowHelper.prototype.setDirection = function ( dir ) {

	var axis = new THREE.Vector3( 0, 1, 0 ).crossSelf( dir );

	var radians = Math.acos( new THREE.Vector3( 0, 1, 0 ).dot( dir.clone().normalize() ) );

	this.matrix = new THREE.Matrix4().makeRotationAxis( axis.normalize(), radians );

	this.rotation.setEulerFromRotationMatrix( this.matrix, this.eulerOrder );

};

THREE.ArrowHelper.prototype.setLength = function ( length ) {

	this.scale.set( length, length, length );

};

THREE.ArrowHelper.prototype.setColor = function ( hex ) {

	this.line.material.color.setHex( hex );
	this.cone.material.color.setHex( hex );

};
/**
 * @author alteredq / http://alteredqualia.com/
 *
 *	- shows frustum, line of sight and up of the camera
 *	- suitable for fast updates
 * 	- based on frustum visualization in lightgl.js shadowmap example
 *		http://evanw.github.com/lightgl.js/tests/shadowmap.html
 */

THREE.CameraHelper = function ( camera ) {

	THREE.Line.call( this );

	var scope = this;

	this.geometry = new THREE.Geometry();
	this.material = new THREE.LineBasicMaterial( { color: 0xffffff, vertexColors: THREE.FaceColors } );
	this.type = THREE.LinePieces;

	this.matrixWorld = camera.matrixWorld;
	this.matrixAutoUpdate = false;

	this.pointMap = {};

	// colors

	var hexFrustum = 0xffaa00;
	var hexCone = 0xff0000;
	var hexUp = 0x00aaff;
	var hexTarget = 0xffffff;
	var hexCross = 0x333333;

	// near

	addLine( "n1", "n2", hexFrustum );
	addLine( "n2", "n4", hexFrustum );
	addLine( "n4", "n3", hexFrustum );
	addLine( "n3", "n1", hexFrustum );

	// far

	addLine( "f1", "f2", hexFrustum );
	addLine( "f2", "f4", hexFrustum );
	addLine( "f4", "f3", hexFrustum );
	addLine( "f3", "f1", hexFrustum );

	// sides

	addLine( "n1", "f1", hexFrustum );
	addLine( "n2", "f2", hexFrustum );
	addLine( "n3", "f3", hexFrustum );
	addLine( "n4", "f4", hexFrustum );

	// cone

	addLine( "p", "n1", hexCone );
	addLine( "p", "n2", hexCone );
	addLine( "p", "n3", hexCone );
	addLine( "p", "n4", hexCone );

	// up

	addLine( "u1", "u2", hexUp );
	addLine( "u2", "u3", hexUp );
	addLine( "u3", "u1", hexUp );

	// target

	addLine( "c", "t", hexTarget );
	addLine( "p", "c", hexCross );

	// cross

	addLine( "cn1", "cn2", hexCross );
	addLine( "cn3", "cn4", hexCross );

	addLine( "cf1", "cf2", hexCross );
	addLine( "cf3", "cf4", hexCross );

	this.camera = camera;

	function addLine( a, b, hex ) {

		addPoint( a, hex );
		addPoint( b, hex );

	}

	function addPoint( id, hex ) {

		scope.geometry.vertices.push( new THREE.Vector3() );
		scope.geometry.colors.push( new THREE.Color( hex ) );

		if ( scope.pointMap[ id ] === undefined ) scope.pointMap[ id ] = [];

		scope.pointMap[ id ].push( scope.geometry.vertices.length - 1 );

	}

	this.update( camera );

};

THREE.CameraHelper.prototype = Object.create( THREE.Line.prototype );

THREE.CameraHelper.prototype.update = function () {

	var scope = this;

	var w = 1, h = 1;

	// we need just camera projection matrix
	// world matrix must be identity

	THREE.CameraHelper.__c.projectionMatrix.copy( this.camera.projectionMatrix );

	// center / target

	setPoint( "c", 0, 0, -1 );
	setPoint( "t", 0, 0,  1 );

	// near

	setPoint( "n1", -w, -h, -1 );
	setPoint( "n2",  w, -h, -1 );
	setPoint( "n3", -w,  h, -1 );
	setPoint( "n4",  w,  h, -1 );

	// far

	setPoint( "f1", -w, -h, 1 );
	setPoint( "f2",  w, -h, 1 );
	setPoint( "f3", -w,  h, 1 );
	setPoint( "f4",  w,  h, 1 );

	// up

	setPoint( "u1",  w * 0.7, h * 1.1, -1 );
	setPoint( "u2", -w * 0.7, h * 1.1, -1 );
	setPoint( "u3",        0, h * 2,   -1 );

	// cross

	setPoint( "cf1", -w,  0, 1 );
	setPoint( "cf2",  w,  0, 1 );
	setPoint( "cf3",  0, -h, 1 );
	setPoint( "cf4",  0,  h, 1 );

	setPoint( "cn1", -w,  0, -1 );
	setPoint( "cn2",  w,  0, -1 );
	setPoint( "cn3",  0, -h, -1 );
	setPoint( "cn4",  0,  h, -1 );

	function setPoint( point, x, y, z ) {

		THREE.CameraHelper.__v.set( x, y, z );
		THREE.CameraHelper.__projector.unprojectVector( THREE.CameraHelper.__v, THREE.CameraHelper.__c );

		var points = scope.pointMap[ point ];

		if ( points !== undefined ) {

			for ( var i = 0, il = points.length; i < il; i ++ ) {

				scope.geometry.vertices[ points[ i ] ].copy( THREE.CameraHelper.__v );

			}

		}

	}

	this.geometry.verticesNeedUpdate = true;

};

THREE.CameraHelper.__projector = new THREE.Projector();
THREE.CameraHelper.__v = new THREE.Vector3();
THREE.CameraHelper.__c = new THREE.Camera();

/**
 * @author alteredq / http://alteredqualia.com/
 *
 *	- shows directional light color, intensity, position, orientation and target
 */

THREE.DirectionalLightHelper = function ( light, sphereSize, arrowLength ) {

	THREE.Object3D.call( this );

	this.light = light;

	// position

	this.position = light.position;

	// direction

	this.direction = new THREE.Vector3();
	this.direction.sub( light.target.position, light.position );

	// color

	this.color = light.color.clone();

	var intensity = THREE.Math.clamp( light.intensity, 0, 1 );

	this.color.r *= intensity;
	this.color.g *= intensity;
	this.color.b *= intensity;

	var hexColor = this.color.getHex();

	// light helper

	var bulbGeometry = new THREE.SphereGeometry( sphereSize, 16, 8 );
	var raysGeometry = new THREE.AsteriskGeometry( sphereSize * 1.25, sphereSize * 2.25 );

	var bulbMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false } );
	var raysMaterial = new THREE.LineBasicMaterial( { color: hexColor, fog: false } );

	this.lightArrow = new THREE.ArrowHelper( this.direction, null, arrowLength, hexColor );
	this.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );

	this.lightArrow.cone.material.fog = false;
	this.lightArrow.line.material.fog = false;

	this.lightRays = new THREE.Line( raysGeometry, raysMaterial, THREE.LinePieces );

	this.add( this.lightArrow );
	this.add( this.lightSphere );
	this.add( this.lightRays );

	this.lightSphere.properties.isGizmo = true;
	this.lightSphere.properties.gizmoSubject = light;
	this.lightSphere.properties.gizmoRoot = this;

	// light target helper

	this.targetSphere = null;

	if ( light.target.properties.targetInverse ) {

		var targetGeo = new THREE.SphereGeometry( sphereSize, 8, 4 );
		var targetMaterial = new THREE.MeshBasicMaterial( { color: hexColor, wireframe: true, fog: false } );

		this.targetSphere = new THREE.Mesh( targetGeo, targetMaterial );
		this.targetSphere.position = light.target.position;

		this.targetSphere.properties.isGizmo = true;
		this.targetSphere.properties.gizmoSubject = light.target;
		this.targetSphere.properties.gizmoRoot = this.targetSphere;

		var lineMaterial = new THREE.LineDashedMaterial( { color: hexColor, dashSize: 4, gapSize: 4, opacity: 0.75, transparent: true, fog: false } );
		var lineGeometry = new THREE.Geometry();
		lineGeometry.vertices.push( this.position.clone() );
		lineGeometry.vertices.push( this.targetSphere.position.clone() );
		lineGeometry.computeLineDistances();

		this.targetLine = new THREE.Line( lineGeometry, lineMaterial );
		this.targetLine.properties.isGizmo = true;

	}

	//

	this.properties.isGizmo = true;

}

THREE.DirectionalLightHelper.prototype = Object.create( THREE.Object3D.prototype );

THREE.DirectionalLightHelper.prototype.update = function () {

	// update arrow orientation
	// pointing from light to target

	this.direction.sub( this.light.target.position, this.light.position );
	this.lightArrow.setDirection( this.direction );

	// update arrow, spheres, rays and line colors to light color * light intensity

	this.color.copy( this.light.color );

	var intensity = THREE.Math.clamp( this.light.intensity, 0, 1 );
	this.color.r *= intensity;
	this.color.g *= intensity;
	this.color.b *= intensity;

	this.lightArrow.setColor( this.color.getHex() );
	this.lightSphere.material.color.copy( this.color );
	this.lightRays.material.color.copy( this.color );

	this.targetSphere.material.color.copy( this.color );
	this.targetLine.material.color.copy( this.color );

	// update target line vertices

	this.targetLine.geometry.vertices[ 0 ].copy( this.light.position );
	this.targetLine.geometry.vertices[ 1 ].copy( this.light.target.position );

	this.targetLine.geometry.computeLineDistances();
	this.targetLine.geometry.verticesNeedUpdate = true;

}

/**
 * @author alteredq / http://alteredqualia.com/
 *
 *	- shows hemisphere light intensity, sky and ground colors and directions
 */

THREE.HemisphereLightHelper = function ( light, sphereSize, arrowLength, domeSize ) {

	THREE.Object3D.call( this );

	this.light = light;

	// position

	this.position = light.position;

	//

	var intensity = THREE.Math.clamp( light.intensity, 0, 1 );

	// sky color

	this.color = light.color.clone();

	this.color.r *= intensity;
	this.color.g *= intensity;
	this.color.b *= intensity;

	var hexColor = this.color.getHex();

	// ground color

	this.groundColor = light.groundColor.clone();

	this.groundColor.r *= intensity;
	this.groundColor.g *= intensity;
	this.groundColor.b *= intensity;

	var hexColorGround = this.groundColor.getHex();

	// double colored light bulb

	var bulbGeometry = new THREE.SphereGeometry( sphereSize, 16, 8, 0, Math.PI * 2, 0, Math.PI * 0.5 );
	var bulbGroundGeometry = new THREE.SphereGeometry( sphereSize, 16, 8, 0, Math.PI * 2, Math.PI * 0.5, Math.PI );

	var bulbSkyMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false } );
	var bulbGroundMaterial = new THREE.MeshBasicMaterial( { color: hexColorGround, fog: false } );

	for ( var i = 0, il = bulbGeometry.faces.length; i < il; i ++ ) {

		bulbGeometry.faces[ i ].materialIndex = 0;

	}

	for ( var i = 0, il = bulbGroundGeometry.faces.length; i < il; i ++ ) {

		bulbGroundGeometry.faces[ i ].materialIndex = 1;

	}

	THREE.GeometryUtils.merge( bulbGeometry, bulbGroundGeometry );

	this.lightSphere = new THREE.Mesh( bulbGeometry, new THREE.MeshFaceMaterial( [ bulbSkyMaterial, bulbGroundMaterial ] ) );

	// arrows for sky and ground light directions

	this.lightArrow = new THREE.ArrowHelper( new THREE.Vector3( 0, 1, 0 ), new THREE.Vector3( 0, ( sphereSize + arrowLength ) * 1.1, 0 ), arrowLength, hexColor );
	this.lightArrow.rotation.x = Math.PI;

	this.lightArrowGround = new THREE.ArrowHelper( new THREE.Vector3( 0, 1, 0 ), new THREE.Vector3( 0, ( sphereSize + arrowLength ) * -1.1, 0 ), arrowLength, hexColorGround );

	var joint = new THREE.Object3D();
	joint.rotation.x = -Math.PI * 0.5;

	joint.add( this.lightSphere );
	joint.add( this.lightArrow );
	joint.add( this.lightArrowGround );

	this.add( joint );

	//

	this.lightSphere.properties.isGizmo = true;
	this.lightSphere.properties.gizmoSubject = light;
	this.lightSphere.properties.gizmoRoot = this;

	//

	this.properties.isGizmo = true;

	//

	this.target = new THREE.Vector3();
	this.lookAt( this.target );

}

THREE.HemisphereLightHelper.prototype = Object.create( THREE.Object3D.prototype );

THREE.HemisphereLightHelper.prototype.update = function () {

	// update sphere sky and ground colors to light color * light intensity

	var intensity = THREE.Math.clamp( this.light.intensity, 0, 1 );

	this.color.copy( this.light.color );
	this.groundColor.copy( this.light.groundColor );

	this.color.r *= intensity;
	this.color.g *= intensity;
	this.color.b *= intensity;

	this.groundColor.r *= intensity;
	this.groundColor.g *= intensity;
	this.groundColor.b *= intensity;

	this.lightSphere.material.materials[ 0 ].color.copy( this.color );
	this.lightSphere.material.materials[ 1 ].color.copy( this.groundColor );

	this.lightArrow.setColor( this.color.getHex() );
	this.lightArrowGround.setColor( this.groundColor.getHex() );

	this.lookAt( this.target );

}

/**
 * @author alteredq / http://alteredqualia.com/
 *
 *	- shows point light color, intensity, position and distance
 */

THREE.PointLightHelper = function ( light, sphereSize ) {

	THREE.Object3D.call( this );

	this.light = light;

	// position

	this.position = light.position;

	// color

	this.color = light.color.clone();

	var intensity = THREE.Math.clamp( light.intensity, 0, 1 );

	this.color.r *= intensity;
	this.color.g *= intensity;
	this.color.b *= intensity;

	var hexColor = this.color.getHex();

	// light helper

	var bulbGeometry = new THREE.SphereGeometry( sphereSize, 16, 8 );
	var raysGeometry = new THREE.AsteriskGeometry( sphereSize * 1.25, sphereSize * 2.25 );
	var distanceGeometry = new THREE.IcosahedronGeometry( 1, 2 );

	var bulbMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false } );
	var raysMaterial = new THREE.LineBasicMaterial( { color: hexColor, fog: false } );
	var distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );

	this.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );
	this.lightRays = new THREE.Line( raysGeometry, raysMaterial, THREE.LinePieces );
	this.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );

	var d = light.distance;

	if ( d === 0.0 ) {

		this.lightDistance.visible = false;

	} else {

		this.lightDistance.scale.set( d, d, d );

	}

	this.add( this.lightSphere );
	this.add( this.lightRays );
	this.add( this.lightDistance );

	//

	this.lightSphere.properties.isGizmo = true;
	this.lightSphere.properties.gizmoSubject = light;
	this.lightSphere.properties.gizmoRoot = this;

	//

	this.properties.isGizmo = true;

}

THREE.PointLightHelper.prototype = Object.create( THREE.Object3D.prototype );

THREE.PointLightHelper.prototype.update = function () {

	// update sphere and rays colors to light color * light intensity

	this.color.copy( this.light.color );

	var intensity = THREE.Math.clamp( this.light.intensity, 0, 1 );
	this.color.r *= intensity;
	this.color.g *= intensity;
	this.color.b *= intensity;

	this.lightSphere.material.color.copy( this.color );
	this.lightRays.material.color.copy( this.color );
	this.lightDistance.material.color.copy( this.color );

	//

	var d = this.light.distance;

	if ( d === 0.0 ) {

		this.lightDistance.visible = false;

	} else {

		this.lightDistance.visible = true;
		this.lightDistance.scale.set( d, d, d );

	}

}

/**
 * @author alteredq / http://alteredqualia.com/
 *
 *	- shows spot light color, intensity, position, orientation, light cone and target
 */

THREE.SpotLightHelper = function ( light, sphereSize, arrowLength ) {

	THREE.Object3D.call( this );

	this.light = light;

	// position

	this.position = light.position;

	// direction

	this.direction = new THREE.Vector3();
	this.direction.sub( light.target.position, light.position );

	// color

	this.color = light.color.clone();

	var intensity = THREE.Math.clamp( light.intensity, 0, 1 );

	this.color.r *= intensity;
	this.color.g *= intensity;
	this.color.b *= intensity;

	var hexColor = this.color.getHex();

	// light helper

	var bulbGeometry = new THREE.SphereGeometry( sphereSize, 16, 8 );
	var raysGeometry = new THREE.AsteriskGeometry( sphereSize * 1.25, sphereSize * 2.25 );
	var coneGeometry = new THREE.CylinderGeometry( 0.0001, 1, 1, 8, 1, true );

	var coneMatrix = new THREE.Matrix4();
	coneMatrix.rotateX( -Math.PI/2 );
	coneMatrix.translate( new THREE.Vector3( 0, -0.5, 0 ) );
	coneGeometry.applyMatrix( coneMatrix );

	var bulbMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false } );
	var raysMaterial = new THREE.LineBasicMaterial( { color: hexColor, fog: false } );
	var coneMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.3, transparent: true } );

	this.lightArrow = new THREE.ArrowHelper( this.direction, null, arrowLength, hexColor );
	this.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );
	this.lightCone = new THREE.Mesh( coneGeometry, coneMaterial );

	var coneLength = light.distance ? light.distance : 10000;
	var coneWidth = coneLength * Math.tan( light.angle * 0.5 ) * 2;
	this.lightCone.scale.set( coneWidth, coneWidth, coneLength );

	this.lightArrow.cone.material.fog = false;
	this.lightArrow.line.material.fog = false;

	this.lightRays = new THREE.Line( raysGeometry, raysMaterial, THREE.LinePieces );

	this.gyroscope = new THREE.Gyroscope();

	this.gyroscope.add( this.lightArrow );
	this.gyroscope.add( this.lightSphere );
	this.gyroscope.add( this.lightRays );

	this.add( this.gyroscope );
	this.add( this.lightCone );

	this.lookAt( light.target.position );

	this.lightSphere.properties.isGizmo = true;
	this.lightSphere.properties.gizmoSubject = light;
	this.lightSphere.properties.gizmoRoot = this;

	// light target helper

	this.targetSphere = null;

	if ( light.target.properties.targetInverse ) {

		var targetGeo = new THREE.SphereGeometry( sphereSize, 8, 4 );
		var targetMaterial = new THREE.MeshBasicMaterial( { color: hexColor, wireframe: true, fog: false } );

		this.targetSphere = new THREE.Mesh( targetGeo, targetMaterial );
		this.targetSphere.position = light.target.position;

		this.targetSphere.properties.isGizmo = true;
		this.targetSphere.properties.gizmoSubject = light.target;
		this.targetSphere.properties.gizmoRoot = this.targetSphere;

		var lineMaterial = new THREE.LineDashedMaterial( { color: hexColor, dashSize: 4, gapSize: 4, opacity: 0.75, transparent: true, fog: false } );
		var lineGeometry = new THREE.Geometry();
		lineGeometry.vertices.push( this.position.clone() );
		lineGeometry.vertices.push( this.targetSphere.position.clone() );
		lineGeometry.computeLineDistances();

		this.targetLine = new THREE.Line( lineGeometry, lineMaterial );
		this.targetLine.properties.isGizmo = true;

	}

	//

	this.properties.isGizmo = true;

}

THREE.SpotLightHelper.prototype = Object.create( THREE.Object3D.prototype );

THREE.SpotLightHelper.prototype.update = function () {

	// update arrow orientation
	// pointing from light to target

	this.direction.sub( this.light.target.position, this.light.position );
	this.lightArrow.setDirection( this.direction );

	// update light cone orientation and size

	this.lookAt( this.light.target.position );

	var coneLength = this.light.distance ? this.light.distance : 10000;
	var coneWidth = coneLength * Math.tan( this.light.angle * 0.5 ) * 2;
	this.lightCone.scale.set( coneWidth, coneWidth, coneLength );

	// update arrow, spheres, rays and line colors to light color * light intensity

	this.color.copy( this.light.color );

	var intensity = THREE.Math.clamp( this.light.intensity, 0, 1 );
	this.color.r *= intensity;
	this.color.g *= intensity;
	this.color.b *= intensity;

	this.lightArrow.setColor( this.color.getHex() );
	this.lightSphere.material.color.copy( this.color );
	this.lightRays.material.color.copy( this.color );
	this.lightCone.material.color.copy( this.color );

	this.targetSphere.material.color.copy( this.color );
	this.targetLine.material.color.copy( this.color );

	// update target line vertices

	this.targetLine.geometry.vertices[ 0 ].copy( this.light.position );
	this.targetLine.geometry.vertices[ 1 ].copy( this.light.target.position );

	this.targetLine.geometry.computeLineDistances();
	this.targetLine.geometry.verticesNeedUpdate = true;

}

/*
 *	@author zz85 / http://twitter.com/blurspline / http://www.lab4games.net/zz85/blog
 *
 *	Subdivision Geometry Modifier
 *		using Catmull-Clark Subdivision Surfaces
 *		for creating smooth geometry meshes
 *
 *	Note: a modifier modifies vertices and faces of geometry,
 *		so use geometry.clone() if original geometry needs to be retained
 *
 *	Readings:
 *		http://en.wikipedia.org/wiki/Catmull%E2%80%93Clark_subdivision_surface
 *		http://www.rorydriscoll.com/2008/08/01/catmull-clark-subdivision-the-basics/
 *		http://xrt.wikidot.com/blog:31
 *		"Subdivision Surfaces in Character Animation"
 *
 *		(on boundary edges)
 *		http://rosettacode.org/wiki/Catmull%E2%80%93Clark_subdivision_surface
 *		https://graphics.stanford.edu/wikis/cs148-09-summer/Assignment3Description
 *
 *	Supports:
 *		Closed and Open geometries.
 *
 *	TODO:
 *		crease vertex and "semi-sharp" features
 *		selective subdivision
 */


THREE.SubdivisionModifier = function( subdivisions ) {

	this.subdivisions = (subdivisions === undefined ) ? 1 : subdivisions;

	// Settings
	this.useOldVertexColors = false;
	this.supportUVs = true;
	this.debug = false;

};

// Applies the "modify" pattern
THREE.SubdivisionModifier.prototype.modify = function ( geometry ) {

	var repeats = this.subdivisions;

	while ( repeats-- > 0 ) {
		this.smooth( geometry );
	}

};

/// REFACTORING THIS OUT

THREE.GeometryUtils.orderedKey = function ( a, b ) {

	return Math.min( a, b ) + "_" + Math.max( a, b );

};


// Returns a hashmap - of { edge_key: face_index }
THREE.GeometryUtils.computeEdgeFaces = function ( geometry ) {

	var i, il, v1, v2, j, k,
		face, faceIndices, faceIndex,
		edge,
		hash,
		edgeFaceMap = {};

	var orderedKey = THREE.GeometryUtils.orderedKey;

	function mapEdgeHash( hash, i ) {

		if ( edgeFaceMap[ hash ] === undefined ) {

			edgeFaceMap[ hash ] = [];

		}

		edgeFaceMap[ hash ].push( i );
	}


	// construct vertex -> face map

	for( i = 0, il = geometry.faces.length; i < il; i ++ ) {

		face = geometry.faces[ i ];

		if ( face instanceof THREE.Face3 ) {

			hash = orderedKey( face.a, face.b );
			mapEdgeHash( hash, i );

			hash = orderedKey( face.b, face.c );
			mapEdgeHash( hash, i );

			hash = orderedKey( face.c, face.a );
			mapEdgeHash( hash, i );

		} else if ( face instanceof THREE.Face4 ) {

			hash = orderedKey( face.a, face.b );
			mapEdgeHash( hash, i );

			hash = orderedKey( face.b, face.c );
			mapEdgeHash( hash, i );

			hash = orderedKey( face.c, face.d );
			mapEdgeHash( hash, i );

			hash = orderedKey( face.d, face.a );
			mapEdgeHash( hash, i );

		}

	}

	// extract faces

	// var edges = [];
	//
	// var numOfEdges = 0;
	// for (i in edgeFaceMap) {
	// 	numOfEdges++;
	//
	// 	edge = edgeFaceMap[i];
	// 	edges.push(edge);
	//
	// }

	//debug('edgeFaceMap', edgeFaceMap, 'geometry.edges',geometry.edges, 'numOfEdges', numOfEdges);

	return edgeFaceMap;

}

/////////////////////////////

// Performs an iteration of Catmull-Clark Subdivision
THREE.SubdivisionModifier.prototype.smooth = function ( oldGeometry ) {

	//debug( 'running smooth' );

	// New set of vertices, faces and uvs
	var newVertices = [], newFaces = [], newUVs = [];

	function v( x, y, z ) {
		newVertices.push( new THREE.Vector3( x, y, z ) );
	}

	var scope = this;
	var orderedKey = THREE.GeometryUtils.orderedKey;
	var computeEdgeFaces = THREE.GeometryUtils.computeEdgeFaces;

	function assert() {

		if (scope.debug && console && console.assert) console.assert.apply(console, arguments);

	}

	function debug() {

		if (scope.debug) console.log.apply(console, arguments);

	}

	function warn() {

		if (console)
		console.log.apply(console, arguments);

	}

	function f4( a, b, c, d, oldFace, orders, facei ) {

		// TODO move vertex selection over here!

		var newFace = new THREE.Face4( a, b, c, d, null, oldFace.color, oldFace.materialIndex );

		if (scope.useOldVertexColors) {

			newFace.vertexColors = [];

			var color, tmpColor, order;

			for (var i=0;i<4;i++) {

				order = orders[i];

				color = new THREE.Color(),
				color.setRGB(0,0,0);

				for (var j=0, jl=0; j<order.length;j++) {
					tmpColor = oldFace.vertexColors[order[j]-1];
					color.r += tmpColor.r;
					color.g += tmpColor.g;
					color.b += tmpColor.b;
				}

				color.r /= order.length;
				color.g /= order.length;
				color.b /= order.length;

				newFace.vertexColors[i] = color;

			}

		}

		newFaces.push( newFace );

		if (scope.supportUVs) {

			var aUv = [
				getUV(a, ''),
				getUV(b, facei),
				getUV(c, facei),
				getUV(d, facei)
			];

			if (!aUv[0]) debug('a :( ', a+':'+facei);
			else if (!aUv[1]) debug('b :( ', b+':'+facei);
			else if (!aUv[2]) debug('c :( ', c+':'+facei);
			else if (!aUv[3]) debug('d :( ', d+':'+facei);
			else
				newUVs.push( aUv );

		}
	}

	var originalPoints = oldGeometry.vertices;
	var originalFaces = oldGeometry.faces;
	var originalVerticesLength = originalPoints.length;

	var newPoints = originalPoints.concat(); // New set of vertices to work on

	var facePoints = [], // these are new points on exisiting faces
		edgePoints = {}; // these are new points on exisiting edges

	var sharpEdges = {}, sharpVertices = []; // Mark edges and vertices to prevent smoothening on them
	// TODO: handle this correctly.

	var uvForVertices = {}; // Stored in {vertex}:{old face} format


	function debugCoreStuff() {

		console.log('facePoints', facePoints, 'edgePoints', edgePoints);
		console.log('edgeFaceMap', edgeFaceMap, 'vertexEdgeMap', vertexEdgeMap);

	}

	function getUV(vertexNo, oldFaceNo) {
		var j,jl;

		var key = vertexNo+':'+oldFaceNo;
		var theUV = uvForVertices[key];

		if (!theUV) {
			if (vertexNo>=originalVerticesLength && vertexNo < (originalVerticesLength + originalFaces.length)) {
				debug('face pt');
			} else {
				debug('edge pt');
			}

			warn('warning, UV not found for', key);

			return null;
		}

		return theUV;

		// Original faces -> Vertex Nos.
		// new Facepoint -> Vertex Nos.
		// edge Points

	}

	function addUV(vertexNo, oldFaceNo, value) {

		var key = vertexNo+':'+oldFaceNo;
		if (!(key in uvForVertices)) {
			uvForVertices[key] = value;
		} else {
			warn('dup vertexNo', vertexNo, 'oldFaceNo', oldFaceNo, 'value', value, 'key', key, uvForVertices[key]);
		}
	}

	// Step 1
	//	For each face, add a face point
	//	Set each face point to be the centroid of all original points for the respective face.
	// debug(oldGeometry);
	var i, il, j, jl, face;

	// For Uvs
	var uvs = oldGeometry.faceVertexUvs[0];
	var abcd = 'abcd', vertice;

	debug('originalFaces, uvs, originalVerticesLength', originalFaces.length, uvs.length, originalVerticesLength);

	if (scope.supportUVs)

	for (i=0, il = uvs.length; i<il; i++ ) {

		for (j=0,jl=uvs[i].length;j<jl;j++) {

			vertice = originalFaces[i][abcd.charAt(j)];
			addUV(vertice, i, uvs[i][j]);

		}

	}

	if (uvs.length == 0) scope.supportUVs = false;

	// Additional UVs check, if we index original
	var uvCount = 0;
	for (var u in uvForVertices) {
		uvCount++;
	}
	if (!uvCount) {
		scope.supportUVs = false;
		debug('no uvs');
	}

	var avgUv ;

	for (i=0, il = originalFaces.length; i<il ;i++) {

		face = originalFaces[ i ];
		facePoints.push( face.centroid );
		newPoints.push( face.centroid );

		if (!scope.supportUVs) continue;

		// Prepare subdivided uv

		avgUv = new THREE.UV();

		if ( face instanceof THREE.Face3 ) {

			avgUv.u = getUV( face.a, i ).u + getUV( face.b, i ).u + getUV( face.c, i ).u;
			avgUv.v = getUV( face.a, i ).v + getUV( face.b, i ).v + getUV( face.c, i ).v;
			avgUv.u /= 3;
			avgUv.v /= 3;

		} else if ( face instanceof THREE.Face4 ) {

			avgUv.u = getUV( face.a, i ).u + getUV( face.b, i ).u + getUV( face.c, i ).u + getUV( face.d, i ).u;
			avgUv.v = getUV( face.a, i ).v + getUV( face.b, i ).v + getUV( face.c, i ).v + getUV( face.d, i ).v;
			avgUv.u /= 4;
			avgUv.v /= 4;

		}

		addUV(originalVerticesLength + i, '', avgUv);

	}

	// Step 2
	//	For each edge, add an edge point.
	//	Set each edge point to be the average of the two neighbouring face points and its two original endpoints.

	var edgeFaceMap = computeEdgeFaces ( oldGeometry ); // Edge Hash -> Faces Index  eg { edge_key: [face_index, face_index2 ]}
	var edge, faceIndexA, faceIndexB, avg;

	// debug('edgeFaceMap', edgeFaceMap);

	var edgeCount = 0;

	var edgeVertex, edgeVertexA, edgeVertexB;

	////

	var vertexEdgeMap = {}; // Gives edges connecting from each vertex
	var vertexFaceMap = {}; // Gives faces connecting from each vertex

	function addVertexEdgeMap(vertex, edge) {

		if (vertexEdgeMap[vertex]===undefined) {

			vertexEdgeMap[vertex] = [];

		}

		vertexEdgeMap[vertex].push(edge);
	}

	function addVertexFaceMap(vertex, face, edge) {

		if (vertexFaceMap[vertex]===undefined) {

			vertexFaceMap[vertex] = {};

		}

		vertexFaceMap[vertex][face] = edge;
		// vertexFaceMap[vertex][face] = null;
	}

	// Prepares vertexEdgeMap and vertexFaceMap
	for (i in edgeFaceMap) { // This is for every edge
		edge = edgeFaceMap[i];

		edgeVertex = i.split('_');
		edgeVertexA = edgeVertex[0];
		edgeVertexB = edgeVertex[1];

		// Maps an edgeVertex to connecting edges
		addVertexEdgeMap(edgeVertexA, [edgeVertexA, edgeVertexB] );
		addVertexEdgeMap(edgeVertexB, [edgeVertexA, edgeVertexB] );

		for (j=0,jl=edge.length;j<jl;j++) {

			face = edge[j];
			addVertexFaceMap(edgeVertexA, face, i);
			addVertexFaceMap(edgeVertexB, face, i);

		}

		// {edge vertex: { face1: edge_key, face2: edge_key.. } }

		// this thing is fishy right now.
		if (edge.length < 2) {

			// edge is "sharp";
			sharpEdges[i] = true;
			sharpVertices[edgeVertexA] = true;
			sharpVertices[edgeVertexB] = true;

		}

	}

	for (i in edgeFaceMap) {

		edge = edgeFaceMap[i];

		faceIndexA = edge[0]; // face index a
		faceIndexB = edge[1]; // face index b

		edgeVertex = i.split('_');
		edgeVertexA = edgeVertex[0];
		edgeVertexB = edgeVertex[1];

		avg = new THREE.Vector3();

		//debug(i, faceIndexB,facePoints[faceIndexB]);

		assert(edge.length > 0, 'an edge without faces?!');

		if (edge.length==1) {

			avg.addSelf(originalPoints[edgeVertexA]);
			avg.addSelf(originalPoints[edgeVertexB]);
			avg.multiplyScalar(0.5);

			sharpVertices[newPoints.length] = true;

		} else {

			avg.addSelf(facePoints[faceIndexA]);
			avg.addSelf(facePoints[faceIndexB]);

			avg.addSelf(originalPoints[edgeVertexA]);
			avg.addSelf(originalPoints[edgeVertexB]);

			avg.multiplyScalar(0.25);

		}

		edgePoints[i] = originalVerticesLength + originalFaces.length + edgeCount;

		newPoints.push( avg );

		edgeCount ++;

		if (!scope.supportUVs) {
			continue;
		}

		// Prepare subdivided uv

		avgUv = new THREE.UV();

		avgUv.u = getUV(edgeVertexA, faceIndexA).u + getUV(edgeVertexB, faceIndexA).u;
		avgUv.v = getUV(edgeVertexA, faceIndexA).v + getUV(edgeVertexB, faceIndexA).v;
		avgUv.u /= 2;
		avgUv.v /= 2;

		addUV(edgePoints[i], faceIndexA, avgUv);

		if (edge.length>=2) {
			assert(edge.length == 2, 'did we plan for more than 2 edges?');
			avgUv = new THREE.UV();

			avgUv.u = getUV(edgeVertexA, faceIndexB).u + getUV(edgeVertexB, faceIndexB).u;
			avgUv.v = getUV(edgeVertexA, faceIndexB).v + getUV(edgeVertexB, faceIndexB).v;
			avgUv.u /= 2;
			avgUv.v /= 2;

			addUV(edgePoints[i], faceIndexB, avgUv);
		}

	}

	debug('-- Step 2 done');

	// Step 3
	//	For each face point, add an edge for every edge of the face,
	//	connecting the face point to each edge point for the face.

	var facePt, currentVerticeIndex;

	var hashAB, hashBC, hashCD, hashDA, hashCA;

	var abc123 = ['123', '12', '2', '23'];
	var bca123 = ['123', '23', '3', '31'];
	var cab123 = ['123', '31', '1', '12'];
	var abc1234 = ['1234', '12', '2', '23'];
	var bcd1234 = ['1234', '23', '3', '34'];
	var cda1234 = ['1234', '34', '4', '41'];
	var dab1234 = ['1234', '41', '1', '12'];

	for (i=0, il = facePoints.length; i<il ;i++) { // for every face
		facePt = facePoints[i];
		face = originalFaces[i];
		currentVerticeIndex = originalVerticesLength+ i;

		if ( face instanceof THREE.Face3 ) {

			// create 3 face4s

			hashAB = orderedKey( face.a, face.b );
			hashBC = orderedKey( face.b, face.c );
			hashCA = orderedKey( face.c, face.a );

			f4( currentVerticeIndex, edgePoints[hashAB], face.b, edgePoints[hashBC], face, abc123, i );
			f4( currentVerticeIndex, edgePoints[hashBC], face.c, edgePoints[hashCA], face, bca123, i );
			f4( currentVerticeIndex, edgePoints[hashCA], face.a, edgePoints[hashAB], face, cab123, i );

		} else if ( face instanceof THREE.Face4 ) {

			// create 4 face4s

			hashAB = orderedKey( face.a, face.b );
			hashBC = orderedKey( face.b, face.c );
			hashCD = orderedKey( face.c, face.d );
			hashDA = orderedKey( face.d, face.a );

			f4( currentVerticeIndex, edgePoints[hashAB], face.b, edgePoints[hashBC], face, abc1234, i );
			f4( currentVerticeIndex, edgePoints[hashBC], face.c, edgePoints[hashCD], face, bcd1234, i );
			f4( currentVerticeIndex, edgePoints[hashCD], face.d, edgePoints[hashDA], face, cda1234, i );
			f4( currentVerticeIndex, edgePoints[hashDA], face.a, edgePoints[hashAB], face, dab1234, i );


		} else {

			debug('face should be a face!', face);

		}

	}

	newVertices = newPoints;

	// Step 4

	//	For each original point P,
	//		take the average F of all n face points for faces touching P,
	//		and take the average R of all n edge midpoints for edges touching P,
	//		where each edge midpoint is the average of its two endpoint vertices.
	//	Move each original point to the point


	var F = new THREE.Vector3();
	var R = new THREE.Vector3();

	var n;
	for (i=0, il = originalPoints.length; i<il; i++) {
		// (F + 2R + (n-3)P) / n

		if (vertexEdgeMap[i]===undefined) continue;

		F.set(0,0,0);
		R.set(0,0,0);
		var newPos =  new THREE.Vector3(0,0,0);

		var f = 0; // this counts number of faces, original vertex is connected to (also known as valance?)
		for (j in vertexFaceMap[i]) {
			F.addSelf(facePoints[j]);
			f++;
		}

		var sharpEdgeCount = 0;

		n = vertexEdgeMap[i].length; // given a vertex, return its connecting edges

		// Are we on the border?
		var boundary_case = f != n;

		// if (boundary_case) {
		// 	console.error('moo', 'o', i, 'faces touched', f, 'edges',  n, n == 2);
		// }

		for (j=0;j<n;j++) {
			if (
				sharpEdges[
					orderedKey(vertexEdgeMap[i][j][0],vertexEdgeMap[i][j][1])
				]) {
					sharpEdgeCount++;
				}
		}

		// if ( sharpEdgeCount==2 ) {
		// 	continue;
		// 	// Do not move vertex if there's 2 connecting sharp edges.
		// }

		/*
		if (sharpEdgeCount>2) {
			// TODO
		}
		*/

		F.divideScalar(f);


		var boundary_edges = 0;

		if (boundary_case) {

			var bb_edge;
			for (j=0; j<n;j++) {
				edge = vertexEdgeMap[i][j];
				bb_edge = edgeFaceMap[orderedKey(edge[0], edge[1])].length == 1
				if (bb_edge) {
					var midPt = originalPoints[edge[0]].clone().addSelf(originalPoints[edge[1]]).divideScalar(2);
					R.addSelf(midPt);
					boundary_edges++;
				}
			}

			R.divideScalar(4);
			// console.log(j + ' --- ' + n + ' --- ' + boundary_edges);
			assert(boundary_edges == 2, 'should have only 2 boundary edges');

		} else {
			for (j=0; j<n;j++) {
				edge = vertexEdgeMap[i][j];
				var midPt = originalPoints[edge[0]].clone().addSelf(originalPoints[edge[1]]).divideScalar(2);
				R.addSelf(midPt);
			}

			R.divideScalar(n);
		}

		// Sum the formula
		newPos.addSelf(originalPoints[i]);


		if (boundary_case) {

			newPos.divideScalar(2);
			newPos.addSelf(R);

		} else {

			newPos.multiplyScalar(n - 3);

			newPos.addSelf(F);
			newPos.addSelf(R.multiplyScalar(2));
			newPos.divideScalar(n);

		}

		newVertices[i] = newPos;

	}

	var newGeometry = oldGeometry; // Let's pretend the old geometry is now new :P

	newGeometry.vertices = newVertices;
	newGeometry.faces = newFaces;
	newGeometry.faceVertexUvs[ 0 ] = newUVs;

	delete newGeometry.__tmpVertices; // makes __tmpVertices undefined :P

	newGeometry.computeCentroids();
	newGeometry.computeFaceNormals();
	newGeometry.computeVertexNormals();

};
/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.ImmediateRenderObject = function ( ) {

	THREE.Object3D.call( this );

	this.render = function ( renderCallback ) { };

};

THREE.ImmediateRenderObject.prototype = Object.create( THREE.Object3D.prototype );
/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.LensFlare = function ( texture, size, distance, blending, color ) {

	THREE.Object3D.call( this );

	this.lensFlares = [];

	this.positionScreen = new THREE.Vector3();
	this.customUpdateCallback = undefined;

	if( texture !== undefined ) {

		this.add( texture, size, distance, blending, color );

	}

};

THREE.LensFlare.prototype = Object.create( THREE.Object3D.prototype );


/*
 * Add: adds another flare
 */

THREE.LensFlare.prototype.add = function ( texture, size, distance, blending, color, opacity ) {

	if( size === undefined ) size = -1;
	if( distance === undefined ) distance = 0;
	if( opacity === undefined ) opacity = 1;
	if( color === undefined ) color = new THREE.Color( 0xffffff );
	if( blending === undefined ) blending = THREE.NormalBlending;

	distance = Math.min( distance, Math.max( 0, distance ) );

	this.lensFlares.push( { texture: texture, 			// THREE.Texture
		                    size: size, 				// size in pixels (-1 = use texture.width)
		                    distance: distance, 		// distance (0-1) from light source (0=at light source)
		                    x: 0, y: 0, z: 0,			// screen position (-1 => 1) z = 0 is ontop z = 1 is back
		                    scale: 1, 					// scale
		                    rotation: 1, 				// rotation
		                    opacity: opacity,			// opacity
							color: color,				// color
		                    blending: blending } );		// blending

};


/*
 * Update lens flares update positions on all flares based on the screen position
 * Set myLensFlare.customUpdateCallback to alter the flares in your project specific way.
 */

THREE.LensFlare.prototype.updateLensFlares = function () {

	var f, fl = this.lensFlares.length;
	var flare;
	var vecX = -this.positionScreen.x * 2;
	var vecY = -this.positionScreen.y * 2;

	for( f = 0; f < fl; f ++ ) {

		flare = this.lensFlares[ f ];

		flare.x = this.positionScreen.x + vecX * flare.distance;
		flare.y = this.positionScreen.y + vecY * flare.distance;

		flare.wantedRotation = flare.x * Math.PI * 0.25;
		flare.rotation += ( flare.wantedRotation - flare.rotation ) * 0.25;

	}

};












/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.MorphBlendMesh = function( geometry, material ) {

	THREE.Mesh.call( this, geometry, material );

	this.animationsMap = {};
	this.animationsList = [];

	// prepare default animation
	// (all frames played together in 1 second)

	var numFrames = this.geometry.morphTargets.length;

	var name = "__default";

	var startFrame = 0;
	var endFrame = numFrames - 1;

	var fps = numFrames / 1;

	this.createAnimation( name, startFrame, endFrame, fps );
	this.setAnimationWeight( name, 1 );

};

THREE.MorphBlendMesh.prototype = Object.create( THREE.Mesh.prototype );

THREE.MorphBlendMesh.prototype.createAnimation = function ( name, start, end, fps ) {

	var animation = {

		startFrame: start,
		endFrame: end,

		length: end - start + 1,

		fps: fps,
		duration: ( end - start ) / fps,

		lastFrame: 0,
		currentFrame: 0,

		active: false,

		time: 0,
		direction: 1,
		weight: 1,

		directionBackwards: false,
		mirroredLoop: false

	};

	this.animationsMap[ name ] = animation;
	this.animationsList.push( animation );

};

THREE.MorphBlendMesh.prototype.autoCreateAnimations = function ( fps ) {

	var pattern = /([a-z]+)(\d+)/;

	var firstAnimation, frameRanges = {};

	var geometry = this.geometry;

	for ( var i = 0, il = geometry.morphTargets.length; i < il; i ++ ) {

		var morph = geometry.morphTargets[ i ];
		var chunks = morph.name.match( pattern );

		if ( chunks && chunks.length > 1 ) {

			var name = chunks[ 1 ];
			var num = chunks[ 2 ];

			if ( ! frameRanges[ name ] ) frameRanges[ name ] = { start: Infinity, end: -Infinity };

			var range = frameRanges[ name ];

			if ( i < range.start ) range.start = i;
			if ( i > range.end ) range.end = i;

			if ( ! firstAnimation ) firstAnimation = name;

		}

	}

	for ( var name in frameRanges ) {

		var range = frameRanges[ name ];
		this.createAnimation( name, range.start, range.end, fps );

	}

	this.firstAnimation = firstAnimation;

};

THREE.MorphBlendMesh.prototype.setAnimationDirectionForward = function ( name ) {

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		animation.direction = 1;
		animation.directionBackwards = false;

	}

};

THREE.MorphBlendMesh.prototype.setAnimationDirectionBackward = function ( name ) {

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		animation.direction = -1;
		animation.directionBackwards = true;

	}

};

THREE.MorphBlendMesh.prototype.setAnimationFPS = function ( name, fps ) {

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		animation.fps = fps;
		animation.duration = ( animation.end - animation.start ) / animation.fps;

	}

};

THREE.MorphBlendMesh.prototype.setAnimationDuration = function ( name, duration ) {

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		animation.duration = duration;
		animation.fps = ( animation.end - animation.start ) / animation.duration;

	}

};

THREE.MorphBlendMesh.prototype.setAnimationWeight = function ( name, weight ) {

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		animation.weight = weight;

	}

};

THREE.MorphBlendMesh.prototype.setAnimationTime = function ( name, time ) {

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		animation.time = time;

	}

};

THREE.MorphBlendMesh.prototype.getAnimationTime = function ( name ) {

	var time = 0;

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		time = animation.time;

	}

	return time;

};

THREE.MorphBlendMesh.prototype.getAnimationDuration = function ( name ) {

	var duration = -1;

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		duration = animation.duration;

	}

	return duration;

};

THREE.MorphBlendMesh.prototype.playAnimation = function ( name ) {

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		animation.time = 0;
		animation.active = true;

	} else {

		console.warn( "animation[" + name + "] undefined" );

	}

};

THREE.MorphBlendMesh.prototype.stopAnimation = function ( name ) {

	var animation = this.animationsMap[ name ];

	if ( animation ) {

		animation.active = false;

	}

};

THREE.MorphBlendMesh.prototype.update = function ( delta ) {

	for ( var i = 0, il = this.animationsList.length; i < il; i ++ ) {

		var animation = this.animationsList[ i ];

		if ( ! animation.active ) continue;

		var frameTime = animation.duration / animation.length;

		animation.time += animation.direction * delta;

		if ( animation.mirroredLoop ) {

			if ( animation.time > animation.duration || animation.time < 0 ) {

				animation.direction *= -1;

				if ( animation.time > animation.duration ) {

					animation.time = animation.duration;
					animation.directionBackwards = true;

				}

				if ( animation.time < 0 ) {

					animation.time = 0;
					animation.directionBackwards = false;

				}

			}

		} else {

			animation.time = animation.time % animation.duration;

			if ( animation.time < 0 ) animation.time += animation.duration;

		}

		var keyframe = animation.startFrame + THREE.Math.clamp( Math.floor( animation.time / frameTime ), 0, animation.length - 1 );
		var weight = animation.weight;

		if ( keyframe !== animation.currentFrame ) {

			this.morphTargetInfluences[ animation.lastFrame ] = 0;
			this.morphTargetInfluences[ animation.currentFrame ] = 1 * weight;

			this.morphTargetInfluences[ keyframe ] = 0;

			animation.lastFrame = animation.currentFrame;
			animation.currentFrame = keyframe;

		}

		var mix = ( animation.time % frameTime ) / frameTime;

		if ( animation.directionBackwards ) mix = 1 - mix;

		this.morphTargetInfluences[ animation.currentFrame ] = mix * weight;
		this.morphTargetInfluences[ animation.lastFrame ] = ( 1 - mix ) * weight;

	}

};
/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.LensFlarePlugin = function ( ) {

	var _gl, _renderer, _lensFlare = {};

	this.init = function ( renderer ) {

		_gl = renderer.context;
		_renderer = renderer;

		_lensFlare.vertices = new Float32Array( 8 + 8 );
		_lensFlare.faces = new Uint16Array( 6 );

		var i = 0;
		_lensFlare.vertices[ i++ ] = -1; _lensFlare.vertices[ i++ ] = -1;	// vertex
		_lensFlare.vertices[ i++ ] = 0;  _lensFlare.vertices[ i++ ] = 0;	// uv... etc.

		_lensFlare.vertices[ i++ ] = 1;  _lensFlare.vertices[ i++ ] = -1;
		_lensFlare.vertices[ i++ ] = 1;  _lensFlare.vertices[ i++ ] = 0;

		_lensFlare.vertices[ i++ ] = 1;  _lensFlare.vertices[ i++ ] = 1;
		_lensFlare.vertices[ i++ ] = 1;  _lensFlare.vertices[ i++ ] = 1;

		_lensFlare.vertices[ i++ ] = -1; _lensFlare.vertices[ i++ ] = 1;
		_lensFlare.vertices[ i++ ] = 0;  _lensFlare.vertices[ i++ ] = 1;

		i = 0;
		_lensFlare.faces[ i++ ] = 0; _lensFlare.faces[ i++ ] = 1; _lensFlare.faces[ i++ ] = 2;
		_lensFlare.faces[ i++ ] = 0; _lensFlare.faces[ i++ ] = 2; _lensFlare.faces[ i++ ] = 3;

		// buffers

		_lensFlare.vertexBuffer     = _gl.createBuffer();
		_lensFlare.elementBuffer    = _gl.createBuffer();

		_gl.bindBuffer( _gl.ARRAY_BUFFER, _lensFlare.vertexBuffer );
		_gl.bufferData( _gl.ARRAY_BUFFER, _lensFlare.vertices, _gl.STATIC_DRAW );

		_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, _lensFlare.elementBuffer );
		_gl.bufferData( _gl.ELEMENT_ARRAY_BUFFER, _lensFlare.faces, _gl.STATIC_DRAW );

		// textures

		_lensFlare.tempTexture      = _gl.createTexture();
		_lensFlare.occlusionTexture = _gl.createTexture();

		_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.tempTexture );
		_gl.texImage2D( _gl.TEXTURE_2D, 0, _gl.RGB, 16, 16, 0, _gl.RGB, _gl.UNSIGNED_BYTE, null );
		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE );
		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE );
		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_MAG_FILTER, _gl.NEAREST );
		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_MIN_FILTER, _gl.NEAREST );

		_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.occlusionTexture );
		_gl.texImage2D( _gl.TEXTURE_2D, 0, _gl.RGBA, 16, 16, 0, _gl.RGBA, _gl.UNSIGNED_BYTE, null );
		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE );
		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE );
		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_MAG_FILTER, _gl.NEAREST );
		_gl.texParameteri( _gl.TEXTURE_2D, _gl.TEXTURE_MIN_FILTER, _gl.NEAREST );

		if ( _gl.getParameter( _gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS ) <= 0 ) {

			_lensFlare.hasVertexTexture = false;
			_lensFlare.program = createProgram( THREE.ShaderFlares[ "lensFlare" ] );

		} else {

			_lensFlare.hasVertexTexture = true;
			_lensFlare.program = createProgram( THREE.ShaderFlares[ "lensFlareVertexTexture" ] );

		}

		_lensFlare.attributes = {};
		_lensFlare.uniforms = {};

		_lensFlare.attributes.vertex       = _gl.getAttribLocation ( _lensFlare.program, "position" );
		_lensFlare.attributes.uv           = _gl.getAttribLocation ( _lensFlare.program, "uv" );

		_lensFlare.uniforms.renderType     = _gl.getUniformLocation( _lensFlare.program, "renderType" );
		_lensFlare.uniforms.map            = _gl.getUniformLocation( _lensFlare.program, "map" );
		_lensFlare.uniforms.occlusionMap   = _gl.getUniformLocation( _lensFlare.program, "occlusionMap" );
		_lensFlare.uniforms.opacity        = _gl.getUniformLocation( _lensFlare.program, "opacity" );
		_lensFlare.uniforms.color          = _gl.getUniformLocation( _lensFlare.program, "color" );
		_lensFlare.uniforms.scale          = _gl.getUniformLocation( _lensFlare.program, "scale" );
		_lensFlare.uniforms.rotation       = _gl.getUniformLocation( _lensFlare.program, "rotation" );
		_lensFlare.uniforms.screenPosition = _gl.getUniformLocation( _lensFlare.program, "screenPosition" );

		_lensFlare.attributesEnabled = false;

	};


	/*
	 * Render lens flares
	 * Method: renders 16x16 0xff00ff-colored points scattered over the light source area,
	 *         reads these back and calculates occlusion.
	 *         Then _lensFlare.update_lensFlares() is called to re-position and
	 *         update transparency of flares. Then they are rendered.
	 *
	 */

	this.render = function ( scene, camera, viewportWidth, viewportHeight ) {

		var flares = scene.__webglFlares,
			nFlares = flares.length;

		if ( ! nFlares ) return;

		var tempPosition = new THREE.Vector3();

		var invAspect = viewportHeight / viewportWidth,
			halfViewportWidth = viewportWidth * 0.5,
			halfViewportHeight = viewportHeight * 0.5;

		var size = 16 / viewportHeight,
			scale = new THREE.Vector2( size * invAspect, size );

		var screenPosition = new THREE.Vector3( 1, 1, 0 ),
			screenPositionPixels = new THREE.Vector2( 1, 1 );

		var uniforms = _lensFlare.uniforms,
			attributes = _lensFlare.attributes;

		// set _lensFlare program and reset blending

		_gl.useProgram( _lensFlare.program );

		if ( ! _lensFlare.attributesEnabled ) {

			_gl.enableVertexAttribArray( _lensFlare.attributes.vertex );
			_gl.enableVertexAttribArray( _lensFlare.attributes.uv );

			_lensFlare.attributesEnabled = true;

		}

		// loop through all lens flares to update their occlusion and positions
		// setup gl and common used attribs/unforms

		_gl.uniform1i( uniforms.occlusionMap, 0 );
		_gl.uniform1i( uniforms.map, 1 );

		_gl.bindBuffer( _gl.ARRAY_BUFFER, _lensFlare.vertexBuffer );
		_gl.vertexAttribPointer( attributes.vertex, 2, _gl.FLOAT, false, 2 * 8, 0 );
		_gl.vertexAttribPointer( attributes.uv, 2, _gl.FLOAT, false, 2 * 8, 8 );

		_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, _lensFlare.elementBuffer );

		_gl.disable( _gl.CULL_FACE );
		_gl.depthMask( false );

		var i, j, jl, flare, sprite;

		for ( i = 0; i < nFlares; i ++ ) {

			size = 16 / viewportHeight;
			scale.set( size * invAspect, size );

			// calc object screen position

			flare = flares[ i ];

			tempPosition.set( flare.matrixWorld.elements[12], flare.matrixWorld.elements[13], flare.matrixWorld.elements[14] );

			camera.matrixWorldInverse.multiplyVector3( tempPosition );
			camera.projectionMatrix.multiplyVector3( tempPosition );

			// setup arrays for gl programs

			screenPosition.copy( tempPosition )

			screenPositionPixels.x = screenPosition.x * halfViewportWidth + halfViewportWidth;
			screenPositionPixels.y = screenPosition.y * halfViewportHeight + halfViewportHeight;

			// screen cull

			if ( _lensFlare.hasVertexTexture || (
				screenPositionPixels.x > 0 &&
				screenPositionPixels.x < viewportWidth &&
				screenPositionPixels.y > 0 &&
				screenPositionPixels.y < viewportHeight ) ) {

				// save current RGB to temp texture

				_gl.activeTexture( _gl.TEXTURE1 );
				_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.tempTexture );
				_gl.copyTexImage2D( _gl.TEXTURE_2D, 0, _gl.RGB, screenPositionPixels.x - 8, screenPositionPixels.y - 8, 16, 16, 0 );


				// render pink quad

				_gl.uniform1i( uniforms.renderType, 0 );
				_gl.uniform2f( uniforms.scale, scale.x, scale.y );
				_gl.uniform3f( uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z );

				_gl.disable( _gl.BLEND );
				_gl.enable( _gl.DEPTH_TEST );

				_gl.drawElements( _gl.TRIANGLES, 6, _gl.UNSIGNED_SHORT, 0 );


				// copy result to occlusionMap

				_gl.activeTexture( _gl.TEXTURE0 );
				_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.occlusionTexture );
				_gl.copyTexImage2D( _gl.TEXTURE_2D, 0, _gl.RGBA, screenPositionPixels.x - 8, screenPositionPixels.y - 8, 16, 16, 0 );


				// restore graphics

				_gl.uniform1i( uniforms.renderType, 1 );
				_gl.disable( _gl.DEPTH_TEST );

				_gl.activeTexture( _gl.TEXTURE1 );
				_gl.bindTexture( _gl.TEXTURE_2D, _lensFlare.tempTexture );
				_gl.drawElements( _gl.TRIANGLES, 6, _gl.UNSIGNED_SHORT, 0 );


				// update object positions

				flare.positionScreen.copy( screenPosition )

				if ( flare.customUpdateCallback ) {

					flare.customUpdateCallback( flare );

				} else {

					flare.updateLensFlares();

				}

				// render flares

				_gl.uniform1i( uniforms.renderType, 2 );
				_gl.enable( _gl.BLEND );

				for ( j = 0, jl = flare.lensFlares.length; j < jl; j ++ ) {

					sprite = flare.lensFlares[ j ];

					if ( sprite.opacity > 0.001 && sprite.scale > 0.001 ) {

						screenPosition.x = sprite.x;
						screenPosition.y = sprite.y;
						screenPosition.z = sprite.z;

						size = sprite.size * sprite.scale / viewportHeight;

						scale.x = size * invAspect;
						scale.y = size;

						_gl.uniform3f( uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z );
						_gl.uniform2f( uniforms.scale, scale.x, scale.y );
						_gl.uniform1f( uniforms.rotation, sprite.rotation );

						_gl.uniform1f( uniforms.opacity, sprite.opacity );
						_gl.uniform3f( uniforms.color, sprite.color.r, sprite.color.g, sprite.color.b );

						_renderer.setBlending( sprite.blending, sprite.blendEquation, sprite.blendSrc, sprite.blendDst );
						_renderer.setTexture( sprite.texture, 1 );

						_gl.drawElements( _gl.TRIANGLES, 6, _gl.UNSIGNED_SHORT, 0 );

					}

				}

			}

		}

		// restore gl

		_gl.enable( _gl.CULL_FACE );
		_gl.enable( _gl.DEPTH_TEST );
		_gl.depthMask( true );

	};

	function createProgram ( shader ) {

		var program = _gl.createProgram();

		var fragmentShader = _gl.createShader( _gl.FRAGMENT_SHADER );
		var vertexShader = _gl.createShader( _gl.VERTEX_SHADER );

		_gl.shaderSource( fragmentShader, shader.fragmentShader );
		_gl.shaderSource( vertexShader, shader.vertexShader );

		_gl.compileShader( fragmentShader );
		_gl.compileShader( vertexShader );

		_gl.attachShader( program, fragmentShader );
		_gl.attachShader( program, vertexShader );

		_gl.linkProgram( program );

		return program;

	};

};/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.ShadowMapPlugin = function ( ) {

	var _gl,
	_renderer,
	_depthMaterial, _depthMaterialMorph, _depthMaterialSkin, _depthMaterialMorphSkin,

	_frustum = new THREE.Frustum(),
	_projScreenMatrix = new THREE.Matrix4(),

	_min = new THREE.Vector3(),
	_max = new THREE.Vector3();

	this.init = function ( renderer ) {

		_gl = renderer.context;
		_renderer = renderer;

		var depthShader = THREE.ShaderLib[ "depthRGBA" ];
		var depthUniforms = THREE.UniformsUtils.clone( depthShader.uniforms );

		_depthMaterial = new THREE.ShaderMaterial( { fragmentShader: depthShader.fragmentShader, vertexShader: depthShader.vertexShader, uniforms: depthUniforms } );
		_depthMaterialMorph = new THREE.ShaderMaterial( { fragmentShader: depthShader.fragmentShader, vertexShader: depthShader.vertexShader, uniforms: depthUniforms, morphTargets: true } );
		_depthMaterialSkin = new THREE.ShaderMaterial( { fragmentShader: depthShader.fragmentShader, vertexShader: depthShader.vertexShader, uniforms: depthUniforms, skinning: true } );
		_depthMaterialMorphSkin = new THREE.ShaderMaterial( { fragmentShader: depthShader.fragmentShader, vertexShader: depthShader.vertexShader, uniforms: depthUniforms, morphTargets: true, skinning: true } );

		_depthMaterial._shadowPass = true;
		_depthMaterialMorph._shadowPass = true;
		_depthMaterialSkin._shadowPass = true;
		_depthMaterialMorphSkin._shadowPass = true;

	};

	this.render = function ( scene, camera ) {

		if ( ! ( _renderer.shadowMapEnabled && _renderer.shadowMapAutoUpdate ) ) return;

		this.update( scene, camera );

	};

	this.update = function ( scene, camera ) {

		var i, il, j, jl, n,

		shadowMap, shadowMatrix, shadowCamera,
		program, buffer, material,
		webglObject, object, light,
		renderList,

		lights = [],
		k = 0,

		fog = null;

		// set GL state for depth map

		_gl.clearColor( 1, 1, 1, 1 );
		_gl.disable( _gl.BLEND );

		_gl.enable( _gl.CULL_FACE );
		_gl.frontFace( _gl.CCW );

		if ( _renderer.shadowMapCullFrontFaces ) {

			_gl.cullFace( _gl.FRONT );

		} else {

			_gl.cullFace( _gl.BACK );

		}

		_renderer.setDepthTest( true );

		// preprocess lights
		// 	- skip lights that are not casting shadows
		//	- create virtual lights for cascaded shadow maps

		for ( i = 0, il = scene.__lights.length; i < il; i ++ ) {

			light = scene.__lights[ i ];

			if ( ! light.castShadow ) continue;

			if ( ( light instanceof THREE.DirectionalLight ) && light.shadowCascade ) {

				for ( n = 0; n < light.shadowCascadeCount; n ++ ) {

					var virtualLight;

					if ( ! light.shadowCascadeArray[ n ] ) {

						virtualLight = createVirtualLight( light, n );
						virtualLight.originalCamera = camera;

						var gyro = new THREE.Gyroscope();
						gyro.position = light.shadowCascadeOffset;

						gyro.add( virtualLight );
						gyro.add( virtualLight.target );

						camera.add( gyro );

						light.shadowCascadeArray[ n ] = virtualLight;

						console.log( "Created virtualLight", virtualLight );

					} else {

						virtualLight = light.shadowCascadeArray[ n ];

					}

					updateVirtualLight( light, n );

					lights[ k ] = virtualLight;
					k ++;

				}

			} else {

				lights[ k ] = light;
				k ++;

			}

		}

		// render depth map

		for ( i = 0, il = lights.length; i < il; i ++ ) {

			light = lights[ i ];

			if ( ! light.shadowMap ) {

				var pars = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBAFormat };

				light.shadowMap = new THREE.WebGLRenderTarget( light.shadowMapWidth, light.shadowMapHeight, pars );
				light.shadowMapSize = new THREE.Vector2( light.shadowMapWidth, light.shadowMapHeight );

				light.shadowMatrix = new THREE.Matrix4();

			}

			if ( ! light.shadowCamera ) {

				if ( light instanceof THREE.SpotLight ) {

					light.shadowCamera = new THREE.PerspectiveCamera( light.shadowCameraFov, light.shadowMapWidth / light.shadowMapHeight, light.shadowCameraNear, light.shadowCameraFar );

				} else if ( light instanceof THREE.DirectionalLight ) {

					light.shadowCamera = new THREE.OrthographicCamera( light.shadowCameraLeft, light.shadowCameraRight, light.shadowCameraTop, light.shadowCameraBottom, light.shadowCameraNear, light.shadowCameraFar );

				} else {

					console.error( "Unsupported light type for shadow" );
					continue;

				}

				scene.add( light.shadowCamera );

				if ( _renderer.autoUpdateScene ) scene.updateMatrixWorld();

			}

			if ( light.shadowCameraVisible && ! light.cameraHelper ) {

				light.cameraHelper = new THREE.CameraHelper( light.shadowCamera );
				light.shadowCamera.add( light.cameraHelper );

			}

			if ( light.isVirtual && virtualLight.originalCamera == camera ) {

				updateShadowCamera( camera, light );

			}

			shadowMap = light.shadowMap;
			shadowMatrix = light.shadowMatrix;
			shadowCamera = light.shadowCamera;

			shadowCamera.position.copy( light.matrixWorld.getPosition() );
			shadowCamera.lookAt( light.target.matrixWorld.getPosition() );
			shadowCamera.updateMatrixWorld();

			shadowCamera.matrixWorldInverse.getInverse( shadowCamera.matrixWorld );

			if ( light.cameraHelper ) light.cameraHelper.visible = light.shadowCameraVisible;
			if ( light.shadowCameraVisible ) light.cameraHelper.update();

			// compute shadow matrix

			shadowMatrix.set( 0.5, 0.0, 0.0, 0.5,
							  0.0, 0.5, 0.0, 0.5,
							  0.0, 0.0, 0.5, 0.5,
							  0.0, 0.0, 0.0, 1.0 );

			shadowMatrix.multiplySelf( shadowCamera.projectionMatrix );
			shadowMatrix.multiplySelf( shadowCamera.matrixWorldInverse );

			// update camera matrices and frustum

			if ( ! shadowCamera._viewMatrixArray ) shadowCamera._viewMatrixArray = new Float32Array( 16 );
			if ( ! shadowCamera._projectionMatrixArray ) shadowCamera._projectionMatrixArray = new Float32Array( 16 );

			shadowCamera.matrixWorldInverse.flattenToArray( shadowCamera._viewMatrixArray );
			shadowCamera.projectionMatrix.flattenToArray( shadowCamera._projectionMatrixArray );

			_projScreenMatrix.multiply( shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse );
			_frustum.setFromMatrix( _projScreenMatrix );

			// render shadow map

			_renderer.setRenderTarget( shadowMap );
			_renderer.clear();

			// set object matrices & frustum culling

			renderList = scene.__webglObjects;

			for ( j = 0, jl = renderList.length; j < jl; j ++ ) {

				webglObject = renderList[ j ];
				object = webglObject.object;

				webglObject.render = false;

				if ( object.visible && object.castShadow ) {

					if ( ! ( object instanceof THREE.Mesh || object instanceof THREE.ParticleSystem ) || ! ( object.frustumCulled ) || _frustum.contains( object ) ) {

						object._modelViewMatrix.multiply( shadowCamera.matrixWorldInverse, object.matrixWorld );

						webglObject.render = true;

					}

				}

			}

			// render regular objects

			var objectMaterial, useMorphing, useSkinning;

			for ( j = 0, jl = renderList.length; j < jl; j ++ ) {

				webglObject = renderList[ j ];

				if ( webglObject.render ) {

					object = webglObject.object;
					buffer = webglObject.buffer;

					// culling is overriden globally for all objects
					// while rendering depth map

					// need to deal with MeshFaceMaterial somehow
					// in that case just use the first of material.materials for now
					// (proper solution would require to break objects by materials
					//  similarly to regular rendering and then set corresponding
					//  depth materials per each chunk instead of just once per object)

					objectMaterial = getObjectMaterial( object );

					useMorphing = object.geometry.morphTargets.length > 0 && objectMaterial.morphTargets;
					useSkinning = object instanceof THREE.SkinnedMesh && objectMaterial.skinning;

					if ( object.customDepthMaterial ) {

						material = object.customDepthMaterial;

					} else if ( useSkinning ) {

						material = useMorphing ? _depthMaterialMorphSkin : _depthMaterialSkin;

					} else if ( useMorphing ) {

						material = _depthMaterialMorph;

					} else {

						material = _depthMaterial;

					}

					if ( buffer instanceof THREE.BufferGeometry ) {

						_renderer.renderBufferDirect( shadowCamera, scene.__lights, fog, material, buffer, object );

					} else {

						_renderer.renderBuffer( shadowCamera, scene.__lights, fog, material, buffer, object );

					}

				}

			}

			// set matrices and render immediate objects

			renderList = scene.__webglObjectsImmediate;

			for ( j = 0, jl = renderList.length; j < jl; j ++ ) {

				webglObject = renderList[ j ];
				object = webglObject.object;

				if ( object.visible && object.castShadow ) {

					object._modelViewMatrix.multiply( shadowCamera.matrixWorldInverse, object.matrixWorld );

					_renderer.renderImmediateObject( shadowCamera, scene.__lights, fog, _depthMaterial, object );

				}

			}

		}

		// restore GL state

		var clearColor = _renderer.getClearColor(),
		clearAlpha = _renderer.getClearAlpha();

		_gl.clearColor( clearColor.r, clearColor.g, clearColor.b, clearAlpha );
		_gl.enable( _gl.BLEND );

		if ( _renderer.shadowMapCullFrontFaces ) {

			_gl.cullFace( _gl.BACK );

		}

	};

	function createVirtualLight( light, cascade ) {

		var virtualLight = new THREE.DirectionalLight();

		virtualLight.isVirtual = true;

		virtualLight.onlyShadow = true;
		virtualLight.castShadow = true;

		virtualLight.shadowCameraNear = light.shadowCameraNear;
		virtualLight.shadowCameraFar = light.shadowCameraFar;

		virtualLight.shadowCameraLeft = light.shadowCameraLeft;
		virtualLight.shadowCameraRight = light.shadowCameraRight;
		virtualLight.shadowCameraBottom = light.shadowCameraBottom;
		virtualLight.shadowCameraTop = light.shadowCameraTop;

		virtualLight.shadowCameraVisible = light.shadowCameraVisible;

		virtualLight.shadowDarkness = light.shadowDarkness;

		virtualLight.shadowBias = light.shadowCascadeBias[ cascade ];
		virtualLight.shadowMapWidth = light.shadowCascadeWidth[ cascade ];
		virtualLight.shadowMapHeight = light.shadowCascadeHeight[ cascade ];

		virtualLight.pointsWorld = [];
		virtualLight.pointsFrustum = [];

		var pointsWorld = virtualLight.pointsWorld,
			pointsFrustum = virtualLight.pointsFrustum;

		for ( var i = 0; i < 8; i ++ ) {

			pointsWorld[ i ] = new THREE.Vector3();
			pointsFrustum[ i ] = new THREE.Vector3();

		}

		var nearZ = light.shadowCascadeNearZ[ cascade ];
		var farZ = light.shadowCascadeFarZ[ cascade ];

		pointsFrustum[ 0 ].set( -1, -1, nearZ );
		pointsFrustum[ 1 ].set(  1, -1, nearZ );
		pointsFrustum[ 2 ].set( -1,  1, nearZ );
		pointsFrustum[ 3 ].set(  1,  1, nearZ );

		pointsFrustum[ 4 ].set( -1, -1, farZ );
		pointsFrustum[ 5 ].set(  1, -1, farZ );
		pointsFrustum[ 6 ].set( -1,  1, farZ );
		pointsFrustum[ 7 ].set(  1,  1, farZ );

		return virtualLight;

	}

	// Synchronize virtual light with the original light

	function updateVirtualLight( light, cascade ) {

		var virtualLight = light.shadowCascadeArray[ cascade ];

		virtualLight.position.copy( light.position );
		virtualLight.target.position.copy( light.target.position );
		virtualLight.lookAt( virtualLight.target );

		virtualLight.shadowCameraVisible = light.shadowCameraVisible;
		virtualLight.shadowDarkness = light.shadowDarkness;

		virtualLight.shadowBias = light.shadowCascadeBias[ cascade ];

		var nearZ = light.shadowCascadeNearZ[ cascade ];
		var farZ = light.shadowCascadeFarZ[ cascade ];

		var pointsFrustum = virtualLight.pointsFrustum;

		pointsFrustum[ 0 ].z = nearZ;
		pointsFrustum[ 1 ].z = nearZ;
		pointsFrustum[ 2 ].z = nearZ;
		pointsFrustum[ 3 ].z = nearZ;

		pointsFrustum[ 4 ].z = farZ;
		pointsFrustum[ 5 ].z = farZ;
		pointsFrustum[ 6 ].z = farZ;
		pointsFrustum[ 7 ].z = farZ;

	}

	// Fit shadow camera's ortho frustum to camera frustum

	function updateShadowCamera( camera, light ) {

		var shadowCamera = light.shadowCamera,
			pointsFrustum = light.pointsFrustum,
			pointsWorld = light.pointsWorld;

		_min.set( Infinity, Infinity, Infinity );
		_max.set( -Infinity, -Infinity, -Infinity );

		for ( var i = 0; i < 8; i ++ ) {

			var p = pointsWorld[ i ];

			p.copy( pointsFrustum[ i ] );
			THREE.ShadowMapPlugin.__projector.unprojectVector( p, camera );

			shadowCamera.matrixWorldInverse.multiplyVector3( p );

			if ( p.x < _min.x ) _min.x = p.x;
			if ( p.x > _max.x ) _max.x = p.x;

			if ( p.y < _min.y ) _min.y = p.y;
			if ( p.y > _max.y ) _max.y = p.y;

			if ( p.z < _min.z ) _min.z = p.z;
			if ( p.z > _max.z ) _max.z = p.z;

		}

		shadowCamera.left = _min.x;
		shadowCamera.right = _max.x;
		shadowCamera.top = _max.y;
		shadowCamera.bottom = _min.y;

		// can't really fit near/far
		//shadowCamera.near = _min.z;
		//shadowCamera.far = _max.z;

		shadowCamera.updateProjectionMatrix();

	}

	// For the moment just ignore objects that have multiple materials with different animation methods
	// Only the first material will be taken into account for deciding which depth material to use for shadow maps

	function getObjectMaterial( object ) {

		return object.material instanceof THREE.MeshFaceMaterial
			? object.material.materials[ 0 ]
			: object.material;

	};

};

THREE.ShadowMapPlugin.__projector = new THREE.Projector();
/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.SpritePlugin = function ( ) {

	var _gl, _renderer, _sprite = {};

	this.init = function ( renderer ) {

		_gl = renderer.context;
		_renderer = renderer;

		_sprite.vertices = new Float32Array( 8 + 8 );
		_sprite.faces    = new Uint16Array( 6 );

		var i = 0;

		_sprite.vertices[ i++ ] = -1; _sprite.vertices[ i++ ] = -1;	// vertex 0
		_sprite.vertices[ i++ ] = 0;  _sprite.vertices[ i++ ] = 0;	// uv 0

		_sprite.vertices[ i++ ] = 1;  _sprite.vertices[ i++ ] = -1;	// vertex 1
		_sprite.vertices[ i++ ] = 1;  _sprite.vertices[ i++ ] = 0;	// uv 1

		_sprite.vertices[ i++ ] = 1;  _sprite.vertices[ i++ ] = 1;	// vertex 2
		_sprite.vertices[ i++ ] = 1;  _sprite.vertices[ i++ ] = 1;	// uv 2

		_sprite.vertices[ i++ ] = -1; _sprite.vertices[ i++ ] = 1;	// vertex 3
		_sprite.vertices[ i++ ] = 0;  _sprite.vertices[ i++ ] = 1;	// uv 3

		i = 0;

		_sprite.faces[ i++ ] = 0; _sprite.faces[ i++ ] = 1; _sprite.faces[ i++ ] = 2;
		_sprite.faces[ i++ ] = 0; _sprite.faces[ i++ ] = 2; _sprite.faces[ i++ ] = 3;

		_sprite.vertexBuffer  = _gl.createBuffer();
		_sprite.elementBuffer = _gl.createBuffer();

		_gl.bindBuffer( _gl.ARRAY_BUFFER, _sprite.vertexBuffer );
		_gl.bufferData( _gl.ARRAY_BUFFER, _sprite.vertices, _gl.STATIC_DRAW );

		_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, _sprite.elementBuffer );
		_gl.bufferData( _gl.ELEMENT_ARRAY_BUFFER, _sprite.faces, _gl.STATIC_DRAW );

		_sprite.program = createProgram( THREE.ShaderSprite[ "sprite" ] );

		_sprite.attributes = {};
		_sprite.uniforms = {};

		_sprite.attributes.position           = _gl.getAttribLocation ( _sprite.program, "position" );
		_sprite.attributes.uv                 = _gl.getAttribLocation ( _sprite.program, "uv" );

		_sprite.uniforms.uvOffset             = _gl.getUniformLocation( _sprite.program, "uvOffset" );
		_sprite.uniforms.uvScale              = _gl.getUniformLocation( _sprite.program, "uvScale" );

		_sprite.uniforms.rotation             = _gl.getUniformLocation( _sprite.program, "rotation" );
		_sprite.uniforms.scale                = _gl.getUniformLocation( _sprite.program, "scale" );
		_sprite.uniforms.alignment            = _gl.getUniformLocation( _sprite.program, "alignment" );

		_sprite.uniforms.color                = _gl.getUniformLocation( _sprite.program, "color" );
		_sprite.uniforms.map                  = _gl.getUniformLocation( _sprite.program, "map" );
		_sprite.uniforms.opacity              = _gl.getUniformLocation( _sprite.program, "opacity" );

		_sprite.uniforms.useScreenCoordinates = _gl.getUniformLocation( _sprite.program, "useScreenCoordinates" );
		_sprite.uniforms.affectedByDistance   = _gl.getUniformLocation( _sprite.program, "affectedByDistance" );
		_sprite.uniforms.screenPosition    	  = _gl.getUniformLocation( _sprite.program, "screenPosition" );
		_sprite.uniforms.modelViewMatrix      = _gl.getUniformLocation( _sprite.program, "modelViewMatrix" );
		_sprite.uniforms.projectionMatrix     = _gl.getUniformLocation( _sprite.program, "projectionMatrix" );

		_sprite.uniforms.fogType 		  	  = _gl.getUniformLocation( _sprite.program, "fogType" );
		_sprite.uniforms.fogDensity 		  = _gl.getUniformLocation( _sprite.program, "fogDensity" );
		_sprite.uniforms.fogNear 		  	  = _gl.getUniformLocation( _sprite.program, "fogNear" );
		_sprite.uniforms.fogFar 		  	  = _gl.getUniformLocation( _sprite.program, "fogFar" );
		_sprite.uniforms.fogColor 		  	  = _gl.getUniformLocation( _sprite.program, "fogColor" );

		_sprite.attributesEnabled = false;

	};

	this.render = function ( scene, camera, viewportWidth, viewportHeight ) {

		var sprites = scene.__webglSprites,
			nSprites = sprites.length;

		if ( ! nSprites ) return;

		var attributes = _sprite.attributes,
			uniforms = _sprite.uniforms;

		var invAspect = viewportHeight / viewportWidth;

		var halfViewportWidth = viewportWidth * 0.5,
			halfViewportHeight = viewportHeight * 0.5;

		var mergeWith3D = true;

		// setup gl

		_gl.useProgram( _sprite.program );

		if ( ! _sprite.attributesEnabled ) {

			_gl.enableVertexAttribArray( attributes.position );
			_gl.enableVertexAttribArray( attributes.uv );

			_sprite.attributesEnabled = true;

		}

		_gl.disable( _gl.CULL_FACE );
		_gl.enable( _gl.BLEND );
		_gl.depthMask( true );

		_gl.bindBuffer( _gl.ARRAY_BUFFER, _sprite.vertexBuffer );
		_gl.vertexAttribPointer( attributes.position, 2, _gl.FLOAT, false, 2 * 8, 0 );
		_gl.vertexAttribPointer( attributes.uv, 2, _gl.FLOAT, false, 2 * 8, 8 );

		_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, _sprite.elementBuffer );

		_gl.uniformMatrix4fv( uniforms.projectionMatrix, false, camera._projectionMatrixArray );

		_gl.activeTexture( _gl.TEXTURE0 );
		_gl.uniform1i( uniforms.map, 0 );

		var oldFogType = 0;
		var sceneFogType = 0;
		var fog = scene.fog;

		if ( fog ) {

			_gl.uniform3f( uniforms.fogColor, fog.color.r, fog.color.g, fog.color.b );

			if ( fog instanceof THREE.Fog ) {

				_gl.uniform1f( uniforms.fogNear, fog.near );
				_gl.uniform1f( uniforms.fogFar, fog.far );

				_gl.uniform1i( uniforms.fogType, 1 );
				oldFogType = 1;
				sceneFogType = 1;

			} else if ( fog instanceof THREE.FogExp2 ) {

				_gl.uniform1f( uniforms.fogDensity, fog.density );

				_gl.uniform1i( uniforms.fogType, 2 );
				oldFogType = 2;
				sceneFogType = 2;

			}

		} else {

			_gl.uniform1i( uniforms.fogType, 0 );
			oldFogType = 0;
			sceneFogType = 0;

		}


		// update positions and sort

		var i, sprite, screenPosition, size, fogType, scale = [];

		for( i = 0; i < nSprites; i ++ ) {

			sprite = sprites[ i ];

			if ( ! sprite.visible || sprite.opacity === 0 ) continue;

			if ( ! sprite.useScreenCoordinates ) {

				sprite._modelViewMatrix.multiply( camera.matrixWorldInverse, sprite.matrixWorld );
				sprite.z = - sprite._modelViewMatrix.elements[ 14 ];

			} else {

				sprite.z = - sprite.position.z;

			}

		}

		sprites.sort( painterSortStable );

		// render all sprites

		for( i = 0; i < nSprites; i ++ ) {

			sprite = sprites[ i ];

			if ( ! sprite.visible || sprite.opacity === 0 ) continue;

			if ( sprite.map && sprite.map.image && sprite.map.image.width ) {

				if ( sprite.useScreenCoordinates ) {

					_gl.uniform1i( uniforms.useScreenCoordinates, 1 );
					_gl.uniform3f(
						uniforms.screenPosition,
						( sprite.position.x - halfViewportWidth  ) / halfViewportWidth,
						( halfViewportHeight - sprite.position.y ) / halfViewportHeight,
						Math.max( 0, Math.min( 1, sprite.position.z ) )
					);

				} else {

					_gl.uniform1i( uniforms.useScreenCoordinates, 0 );
					_gl.uniform1i( uniforms.affectedByDistance, sprite.affectedByDistance ? 1 : 0 );
					_gl.uniformMatrix4fv( uniforms.modelViewMatrix, false, sprite._modelViewMatrix.elements );

				}

				if ( scene.fog && sprite.fog ) {

					fogType = sceneFogType;

				} else {

					fogType = 0;

				}

				if ( oldFogType !== fogType ) {

					_gl.uniform1i( uniforms.fogType, fogType );
					oldFogType = fogType;

				}

				size = 1 / ( sprite.scaleByViewport ? viewportHeight : 1 );

				scale[ 0 ] = size * invAspect * sprite.scale.x;
				scale[ 1 ] = size * sprite.scale.y;

				_gl.uniform2f( uniforms.uvScale, sprite.uvScale.x, sprite.uvScale.y );
				_gl.uniform2f( uniforms.uvOffset, sprite.uvOffset.x, sprite.uvOffset.y );
				_gl.uniform2f( uniforms.alignment, sprite.alignment.x, sprite.alignment.y );

				_gl.uniform1f( uniforms.opacity, sprite.opacity );
				_gl.uniform3f( uniforms.color, sprite.color.r, sprite.color.g, sprite.color.b );

				_gl.uniform1f( uniforms.rotation, sprite.rotation );
				_gl.uniform2fv( uniforms.scale, scale );

				if ( sprite.mergeWith3D && !mergeWith3D ) {

					_gl.enable( _gl.DEPTH_TEST );
					mergeWith3D = true;

				} else if ( ! sprite.mergeWith3D && mergeWith3D ) {

					_gl.disable( _gl.DEPTH_TEST );
					mergeWith3D = false;

				}

				_renderer.setBlending( sprite.blending, sprite.blendEquation, sprite.blendSrc, sprite.blendDst );
				_renderer.setTexture( sprite.map, 0 );

				_gl.drawElements( _gl.TRIANGLES, 6, _gl.UNSIGNED_SHORT, 0 );

			}

		}

		// restore gl

		_gl.enable( _gl.CULL_FACE );
		_gl.enable( _gl.DEPTH_TEST );
		_gl.depthMask( true );

	};

	function createProgram ( shader ) {

		var program = _gl.createProgram();

		var fragmentShader = _gl.createShader( _gl.FRAGMENT_SHADER );
		var vertexShader = _gl.createShader( _gl.VERTEX_SHADER );

		_gl.shaderSource( fragmentShader, shader.fragmentShader );
		_gl.shaderSource( vertexShader, shader.vertexShader );

		_gl.compileShader( fragmentShader );
		_gl.compileShader( vertexShader );

		_gl.attachShader( program, fragmentShader );
		_gl.attachShader( program, vertexShader );

		_gl.linkProgram( program );

		return program;

	};

	function painterSortStable ( a, b ) {

		if ( a.z !== b.z ) {

			return b.z - a.z;

		} else {

			return b.id - a.id;

		}

	};

};/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.DepthPassPlugin = function ( ) {

	this.enabled = false;
	this.renderTarget = null;

	var _gl,
	_renderer,
	_depthMaterial, _depthMaterialMorph, _depthMaterialSkin, _depthMaterialMorphSkin,

	_frustum = new THREE.Frustum(),
	_projScreenMatrix = new THREE.Matrix4();

	this.init = function ( renderer ) {

		_gl = renderer.context;
		_renderer = renderer;

		var depthShader = THREE.ShaderLib[ "depthRGBA" ];
		var depthUniforms = THREE.UniformsUtils.clone( depthShader.uniforms );

		_depthMaterial = new THREE.ShaderMaterial( { fragmentShader: depthShader.fragmentShader, vertexShader: depthShader.vertexShader, uniforms: depthUniforms } );
		_depthMaterialMorph = new THREE.ShaderMaterial( { fragmentShader: depthShader.fragmentShader, vertexShader: depthShader.vertexShader, uniforms: depthUniforms, morphTargets: true } );
		_depthMaterialSkin = new THREE.ShaderMaterial( { fragmentShader: depthShader.fragmentShader, vertexShader: depthShader.vertexShader, uniforms: depthUniforms, skinning: true } );
		_depthMaterialMorphSkin = new THREE.ShaderMaterial( { fragmentShader: depthShader.fragmentShader, vertexShader: depthShader.vertexShader, uniforms: depthUniforms, morphTargets: true, skinning: true } );

		_depthMaterial._shadowPass = true;
		_depthMaterialMorph._shadowPass = true;
		_depthMaterialSkin._shadowPass = true;
		_depthMaterialMorphSkin._shadowPass = true;

	};

	this.render = function ( scene, camera ) {

		if ( ! this.enabled ) return;

		this.update( scene, camera );

	};

	this.update = function ( scene, camera ) {

		var i, il, j, jl, n,

		program, buffer, material,
		webglObject, object, light,
		renderList,

		fog = null;

		// set GL state for depth map

		_gl.clearColor( 1, 1, 1, 1 );
		_gl.disable( _gl.BLEND );

		_renderer.setDepthTest( true );

		// update scene

		if ( _renderer.autoUpdateScene ) scene.updateMatrixWorld();

		// update camera matrices and frustum

		if ( ! camera._viewMatrixArray ) camera._viewMatrixArray = new Float32Array( 16 );
		if ( ! camera._projectionMatrixArray ) camera._projectionMatrixArray = new Float32Array( 16 );

		camera.matrixWorldInverse.getInverse( camera.matrixWorld );

		camera.matrixWorldInverse.flattenToArray( camera._viewMatrixArray );
		camera.projectionMatrix.flattenToArray( camera._projectionMatrixArray );

		_projScreenMatrix.multiply( camera.projectionMatrix, camera.matrixWorldInverse );
		_frustum.setFromMatrix( _projScreenMatrix );

		// render depth map

		_renderer.setRenderTarget( this.renderTarget );
		_renderer.clear();

		// set object matrices & frustum culling

		renderList = scene.__webglObjects;

		for ( j = 0, jl = renderList.length; j < jl; j ++ ) {

			webglObject = renderList[ j ];
			object = webglObject.object;

			webglObject.render = false;

			if ( object.visible ) {

				if ( ! ( object instanceof THREE.Mesh || object instanceof THREE.ParticleSystem ) || ! ( object.frustumCulled ) || _frustum.contains( object ) ) {

					object._modelViewMatrix.multiply( camera.matrixWorldInverse, object.matrixWorld );

					webglObject.render = true;

				}

			}

		}

		// render regular objects

		var objectMaterial, useMorphing, useSkinning;

		for ( j = 0, jl = renderList.length; j < jl; j ++ ) {

			webglObject = renderList[ j ];

			if ( webglObject.render ) {

				object = webglObject.object;
				buffer = webglObject.buffer;

				// todo: create proper depth material for particles

				if ( object instanceof THREE.ParticleSystem && !object.customDepthMaterial ) continue;

				objectMaterial = getObjectMaterial( object );

				if ( objectMaterial ) _renderer.setMaterialFaces( object.material );

				useMorphing = object.geometry.morphTargets.length > 0 && objectMaterial.morphTargets;
				useSkinning = object instanceof THREE.SkinnedMesh && objectMaterial.skinning;

				if ( object.customDepthMaterial ) {

					material = object.customDepthMaterial;

				} else if ( useSkinning ) {

					material = useMorphing ? _depthMaterialMorphSkin : _depthMaterialSkin;

				} else if ( useMorphing ) {

					material = _depthMaterialMorph;

				} else {

					material = _depthMaterial;

				}

				if ( buffer instanceof THREE.BufferGeometry ) {

					_renderer.renderBufferDirect( camera, scene.__lights, fog, material, buffer, object );

				} else {

					_renderer.renderBuffer( camera, scene.__lights, fog, material, buffer, object );

				}

			}

		}

		// set matrices and render immediate objects

		renderList = scene.__webglObjectsImmediate;

		for ( j = 0, jl = renderList.length; j < jl; j ++ ) {

			webglObject = renderList[ j ];
			object = webglObject.object;

			if ( object.visible ) {

				object._modelViewMatrix.multiply( camera.matrixWorldInverse, object.matrixWorld );

				_renderer.renderImmediateObject( camera, scene.__lights, fog, _depthMaterial, object );

			}

		}

		// restore GL state

		var clearColor = _renderer.getClearColor(),
		clearAlpha = _renderer.getClearAlpha();

		_gl.clearColor( clearColor.r, clearColor.g, clearColor.b, clearAlpha );
		_gl.enable( _gl.BLEND );

	};

	// For the moment just ignore objects that have multiple materials with different animation methods
	// Only the first material will be taken into account for deciding which depth material to use

	function getObjectMaterial( object ) {

		return object.material instanceof THREE.MeshFaceMaterial
			? object.material.materials[ 0 ]
			: object.material;

	};

};

/**
 * @author mikael emtinger / http://gomo.se/
 *
 */

THREE.ShaderFlares = {

	'lensFlareVertexTexture': {

		vertexShader: [

			"uniform vec3 screenPosition;",
			"uniform vec2 scale;",
			"uniform float rotation;",
			"uniform int renderType;",

			"uniform sampler2D occlusionMap;",

			"attribute vec2 position;",
			"attribute vec2 uv;",

			"varying vec2 vUV;",
			"varying float vVisibility;",

			"void main() {",

				"vUV = uv;",

				"vec2 pos = position;",

				"if( renderType == 2 ) {",

					"vec4 visibility = texture2D( occlusionMap, vec2( 0.1, 0.1 ) ) +",
									  "texture2D( occlusionMap, vec2( 0.5, 0.1 ) ) +",
									  "texture2D( occlusionMap, vec2( 0.9, 0.1 ) ) +",
									  "texture2D( occlusionMap, vec2( 0.9, 0.5 ) ) +",
									  "texture2D( occlusionMap, vec2( 0.9, 0.9 ) ) +",
									  "texture2D( occlusionMap, vec2( 0.5, 0.9 ) ) +",
									  "texture2D( occlusionMap, vec2( 0.1, 0.9 ) ) +",
									  "texture2D( occlusionMap, vec2( 0.1, 0.5 ) ) +",
									  "texture2D( occlusionMap, vec2( 0.5, 0.5 ) );",

					"vVisibility = (       visibility.r / 9.0 ) *",
								  "( 1.0 - visibility.g / 9.0 ) *",
								  "(       visibility.b / 9.0 ) *",
								  "( 1.0 - visibility.a / 9.0 );",

					"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;",
					"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;",

				"}",

				"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );",

			"}"

		].join( "\n" ),

		fragmentShader: [

			"precision mediump float;",

			"uniform sampler2D map;",
			"uniform float opacity;",
			"uniform int renderType;",
			"uniform vec3 color;",

			"varying vec2 vUV;",
			"varying float vVisibility;",

			"void main() {",

				// pink square

				"if( renderType == 0 ) {",

					"gl_FragColor = vec4( 1.0, 0.0, 1.0, 0.0 );",

				// restore

				"} else if( renderType == 1 ) {",

					"gl_FragColor = texture2D( map, vUV );",

				// flare

				"} else {",

					"vec4 texture = texture2D( map, vUV );",
					"texture.a *= opacity * vVisibility;",
					"gl_FragColor = texture;",
					"gl_FragColor.rgb *= color;",

				"}",

			"}"
		].join( "\n" )

	},


	'lensFlare': {

		vertexShader: [

			"uniform vec3 screenPosition;",
			"uniform vec2 scale;",
			"uniform float rotation;",
			"uniform int renderType;",

			"attribute vec2 position;",
			"attribute vec2 uv;",

			"varying vec2 vUV;",

			"void main() {",

				"vUV = uv;",

				"vec2 pos = position;",

				"if( renderType == 2 ) {",

					"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;",
					"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;",

				"}",

				"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );",

			"}"

		].join( "\n" ),

		fragmentShader: [

			"precision mediump float;",

			"uniform sampler2D map;",
			"uniform sampler2D occlusionMap;",
			"uniform float opacity;",
			"uniform int renderType;",
			"uniform vec3 color;",

			"varying vec2 vUV;",

			"void main() {",

				// pink square

				"if( renderType == 0 ) {",

					"gl_FragColor = vec4( texture2D( map, vUV ).rgb, 0.0 );",

				// restore

				"} else if( renderType == 1 ) {",

					"gl_FragColor = texture2D( map, vUV );",

				// flare

				"} else {",

					"float visibility = texture2D( occlusionMap, vec2( 0.5, 0.1 ) ).a +",
									   "texture2D( occlusionMap, vec2( 0.9, 0.5 ) ).a +",
									   "texture2D( occlusionMap, vec2( 0.5, 0.9 ) ).a +",
									   "texture2D( occlusionMap, vec2( 0.1, 0.5 ) ).a;",

					"visibility = ( 1.0 - visibility / 4.0 );",

					"vec4 texture = texture2D( map, vUV );",
					"texture.a *= opacity * visibility;",
					"gl_FragColor = texture;",
					"gl_FragColor.rgb *= color;",

				"}",

			"}"

		].join( "\n" )

	}

};
/**
 * @author mikael emtinger / http://gomo.se/
 * @author alteredq / http://alteredqualia.com/
 *
 */

THREE.ShaderSprite = {

	'sprite': {

		vertexShader: [

			"uniform int useScreenCoordinates;",
			"uniform int affectedByDistance;",
			"uniform vec3 screenPosition;",
			"uniform mat4 modelViewMatrix;",
			"uniform mat4 projectionMatrix;",
			"uniform float rotation;",
			"uniform vec2 scale;",
			"uniform vec2 alignment;",
			"uniform vec2 uvOffset;",
			"uniform vec2 uvScale;",

			"attribute vec2 position;",
			"attribute vec2 uv;",

			"varying vec2 vUV;",

			"void main() {",

				"vUV = uvOffset + uv * uvScale;",

				"vec2 alignedPosition = position + alignment;",

				"vec2 rotatedPosition;",
				"rotatedPosition.x = ( cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y ) * scale.x;",
				"rotatedPosition.y = ( sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y ) * scale.y;",

				"vec4 finalPosition;",

				"if( useScreenCoordinates != 0 ) {",

					"finalPosition = vec4( screenPosition.xy + rotatedPosition, screenPosition.z, 1.0 );",

				"} else {",

					"finalPosition = projectionMatrix * modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );",
					"finalPosition.xy += rotatedPosition * ( affectedByDistance == 1 ? 1.0 : finalPosition.z );",

				"}",

				"gl_Position = finalPosition;",

			"}"

		].join( "\n" ),

		fragmentShader: [

			"precision mediump float;",

			"uniform vec3 color;",
			"uniform sampler2D map;",
			"uniform float opacity;",

			"uniform int fogType;",
			"uniform vec3 fogColor;",
			"uniform float fogDensity;",
			"uniform float fogNear;",
			"uniform float fogFar;",

			"varying vec2 vUV;",

			"void main() {",

				"vec4 texture = texture2D( map, vUV );",
				"gl_FragColor = vec4( color * texture.xyz, texture.a * opacity );",

				"if ( fogType > 0 ) {",

					"float depth = gl_FragCoord.z / gl_FragCoord.w;",
					"float fogFactor = 0.0;",

					"if ( fogType == 1 ) {",

						"fogFactor = smoothstep( fogNear, fogFar, depth );",

					"} else {",

						"const float LOG2 = 1.442695;",
						"float fogFactor = exp2( - fogDensity * fogDensity * depth * depth * LOG2 );",
						"fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );",

					"}",

					"gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );",

				"}",

			"}"

		].join( "\n" )

	}

};
// tquery.js - https://github.com/jeromeetienne/tquery - MIT License
/**
 * @fileOverview This file is the core of tQuery library.
*/

/**
 * Create a tQuery element
 *
 * @class root class
 *
 * @param {} object
 * @param {THREE.Object3D} rootnode
 * @returns {tQuery.*} the tQuery object created
*/
var tQuery	= function(object, root)
{
	// support for tQuery(geometry, material)
	if( arguments.length === 2 &&
			(arguments[0] instanceof THREE.Geometry
				|| arguments[0] instanceof THREE.BufferGeometry
				|| arguments[0] instanceof tQuery.Geometry)
			&&
			(arguments[1] instanceof THREE.Material || arguments[1] instanceof tQuery.Material)
			){
		var tGeometry	= arguments[0] instanceof tQuery.Geometry ? arguments[0].get(0) : arguments[0];
		var tMaterial	= arguments[1] instanceof tQuery.Material ? arguments[1].get(0) : arguments[1];
		var tMesh	= new THREE.Mesh(tGeometry, tMaterial);
		return tQuery( tMesh );
	}

// TODO make tthat cleaner
// - there is a list of functions registered by each plugins
//   - handle() object instanceof THREE.Mesh
//   - create() return new tQuery(object)
// - this list is processed in order here

	// if the object is an array, compare only the first element
	// - up to the subconstructor to check if the whole array has proper type
	var instance	= Array.isArray(object) ? object[0] : object;

	if( instance instanceof THREE.Mesh  && tQuery.Mesh){
		return new tQuery.Mesh(object);
	}else if( instance instanceof THREE.DirectionalLight && tQuery.DirectionalLight){
		return new tQuery.DirectionalLight(object);
	}else if( instance instanceof THREE.AmbientLight && tQuery.AmbientLight){
		return new tQuery.AmbientLight(object);
	}else if( instance instanceof THREE.Light && tQuery.Light){
		return new tQuery.Light(object);

	}else if( instance instanceof THREE.Object3D  && tQuery.Object3D){
		return new tQuery.Object3D(object);
	}else if( instance instanceof THREE.Geometry && tQuery.Geometry){
		return new tQuery.Geometry(object);
	}else if( instance instanceof THREE.Material && tQuery.Material){
		return new tQuery.Material(object);
	}else if( typeof instance === "string" && tQuery.Object3D){
		return new tQuery.Object3D(object, root);
	}else{
		console.assert(false, "unsupported type")
	}
	return undefined;
};

/**
 * The version of tQuery
*/
tQuery.VERSION	= "r53.0";

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * generic getter/setter
 *
 * @param {Object} object the object in which store the data
 * @param {String} key the key/name of the data to get/set
 * @param {*} value the value to set (optional)
 * @param {Boolean} mustNotExist if true, ensure that the key doesnt already exist, optional default to false
 *
 * @returns {*} return the value stored in this object for this key
*/
tQuery.data	= function(object, key, value, mustNotExist)
{
	// sanity check
	console.assert( object, 'invalid parameters' );
	console.assert( typeof key === 'string', 'invalid parameters');

	// init _tqData
	object['_tqData']	= object['_tqData']	|| {};
	// honor mustNotExist
	if( mustNotExist ){
		console.assert(object['_tqData'][key] === undefined, "This key already exists "+key);
	}
	// set the value if any
	if( value ){
		object['_tqData'][key]	= value;
	}
	// return the value
	return object['_tqData'][key];
};

/**
 * Same as jQuery.removeData()
 *
 * @param {Boolean} mustExist if true, ensure the key does exist, default to false
*/
tQuery.removeData	= function(object, key, mustExist)
{
	// handle the 'key as Array' case
	if( key instanceof Array ){
		key.forEach(function(key){
			tQuery.removeData(object, key);
		})
		return;
	}
	// sanity check
	console.assert( typeof key === "string");
	// honor mustNotExist
	if( mustExist ){
		console.assert(object['_tqData'][key] !== undefined, "This key doesnt already exists "+key);
	}
	// do delete the key
	delete object['_tqData'][key];
	// TOTO remove object[_tqData] if empty now
}


//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * loop over a Array.
 *
 * @param {Array} arr the array to traverse.
 * @param {Function} callback the function to notify. function(element){ }.
 * 			loop interrupted if it returns false
 *
 * @returns {Boolean} return true if completed, false if interrupted
*/
tQuery.each	= function(arr, callback){
	for(var i = 0; i < arr.length; i++){
		var keepLooping	= callback(arr[i])
		if( keepLooping === false )	return false;
	}
	return true;
};

/**
 * precise version of Date.now() -
 * It provide submillisecond precision based on window.performance.now() when
 * available, fall back on Date.now()
 * see http://updates.html5rocks.com/2012/05/requestAnimationFrame-API-now-with-sub-millisecond-precision
*/
tQuery.now	= (function(){
	var p			= window.performance	|| {};
	if( p.now )		return function(){ return p.timing.navigationStart + p.now();		};
	else if( p.mozNow )	return function(){ return p.timing.navigationStart + p.mozNow();	};
	else if( p.webkitNow )	return function(){ return p.timing.navigationStart + p.webkitNow()	};
	else if( p.mskitNow )	return function(){ return p.timing.navigationStart + p.msNow()		};
	else if( p.okitNow )	return function(){ return p.timing.navigationStart + p.oNow()		};
	else			return function(){ return Date.now;					};
})();


/**
 * Make a child Class inherit from the parent class.
 *
 * @param {Object} childClass the child class which gonna inherit
 * @param {Object} parentClass the class which gonna be inherited
*/
tQuery.inherit	= function(childClass, parentClass){
	// trick to avoid calling parentClass constructor
	var tempFn		= function() {};
	tempFn.prototype	= parentClass.prototype;
	childClass.prototype	= new tempFn();


	childClass.parent	= parentClass.prototype;
	childClass.prototype.constructor= childClass;
};

/**
 * extend function. mainly aimed at handling default values - jme: im not sure at all it is the proper one.
 * http://jsapi.info/_/extend
 * similar to jquery one but much smaller
*/
tQuery.extend = function(obj, base, deep){
	// handle parameter polymorphism
	deep		= deep !== undefined ? deep	: true;
	var extendFn	= deep ? deepExtend : shallowExtend;
	var result	= {};
	base	&& extendFn(result, base);
	obj	&& extendFn(result, obj);
	return result;

	function shallowExtend(dst, src){
		Object.keys(src).forEach(function(key){
			dst[key]	= src[key];
		})
	};
	// from http://andrewdupont.net/2009/08/28/deep-extending-objects-in-javascript/
	function deepExtend(dst, src){
		for (var property in src) {
			if (src[property] && src[property].constructor && src[property].constructor === Object) {
				dst[property] = dst[property] || {};
				arguments.callee(dst[property], src[property]);
			} else {
				dst[property] = src[property];
			}
		}
		return dst;
	};
};

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Make an object pluginable
 *
 * @param {Object} object the object on which you mixin function
 * @param {Object} dest the object in which to register the plugin
 * @param {string} suffix the suffix to add to the function name
*/
tQuery._pluginsOn	= function(object, dest, fnNameSuffix){
	dest		= dest	|| object.prototype || object;
	fnNameSuffix	= fnNameSuffix || '';
	// sanity check
	console.assert(object['register'+fnNameSuffix] === undefined);
	console.assert(object['unregister'+fnNameSuffix] === undefined);
	console.assert(object['registered'+fnNameSuffix] === undefined);

	object['register'+fnNameSuffix]		= function(name, funct) {
		console.assert(dest[name] === undefined, 'Conflict! Already method called: ' + name);
		dest[name]	= funct;
	};
	object['unregister'+fnNameSuffix]	= function(name){
		if( dest.hasOwnProperty(name) === false ){
			throw new Error('Plugin not found: ' + name);
		}
		delete dest[name];
	};
	object['registered'+fnNameSuffix]	= function(name){
		return dest.hasOwnProperty(name) === true;
	}
};

tQuery.pluginsInstanceOn= function(klass){
	tQuery._pluginsOn(klass, undefined, 'Instance');
};
tQuery.pluginsStaticOn	= function(klass){
	tQuery._pluginsOn(klass, klass, 'Static');
};

// make it pluginable
tQuery.pluginsStaticOn(tQuery, tQuery);


//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

tQuery.mixinAttributes	= function(dstObject, properties){
	// mixin the new property
	// FIXME the inheritance should work now... not sure
	dstObject.prototype._attrProps	= tQuery.extend(dstObject.prototype._attrProps, properties);

	dstObject.prototype.attr	= function(name, value){
		// handle parameters
		if( name instanceof Object && value === undefined ){
			Object.keys(name).forEach(function(key){
				this.attr(key, name[key]);
			}.bind(this));
		}else if( typeof(name) === 'string' ){
			console.assert( Object.keys(this._attrProps).indexOf(name) !== -1, 'invalid property name:'+name);
		}else	console.assert(false, 'invalid parameter');

		// handle setter
		if( value !== undefined ){
			var convertFn	= this._attrProps[name];
			value		= convertFn(value);
			this.each(function(element){
				element[name]	= value;
			})
			return this;
		}
		// handle getter
		if( this.length === 0 )	return undefined
		var element	= this.get(0);
		return element[name];
	};

	// add shortcuts
	Object.keys(properties).forEach(function(name){
		dstObject.prototype[name]	= function(value){
			return this.attr(name, value);
		};
	}.bind(this));
};

//////////////////////////////////////////////////////////////////////////////////
//		put some helpers						//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Flow control - from https://github.com/jeromeetienne/gowiththeflow.js
*/
tQuery.Flow	= function(){
	var self, stack = [], timerId = setTimeout(function(){ timerId = null; self._next(); }, 0);
	return self = {
		destroy	: function(){ timerId && clearTimeout(timerId);	},
		par	: function(callback, isSeq){
			if(isSeq || !(stack[stack.length-1] instanceof Array)) stack.push([]);
			stack[stack.length-1].push(callback);
			return self;
		},seq	: function(callback){ return self.par(callback, true);	},
		_next	: function(err, result){
			var errors = [], results = [], callbacks = stack.shift() || [], nbReturn = callbacks.length, isSeq = nbReturn == 1;
			callbacks && callbacks.forEach(function(fct, index){
				fct(function(error, result){
					errors[index]	= error;
					results[index]	= result;
					if(--nbReturn == 0)	self._next(isSeq?errors[0]:errors, isSeq?results[0]:results)
				}, err, result)
			})
		}
	}
};

/**
 * microevents.js - https://github.com/jeromeetienne/microevent.js
*/
tQuery.MicroeventMixin	= function(destObj){
	var bind	= function(event, fct){
		if(this._events === undefined) 	this._events	= {};
		this._events[event] = this._events[event]	|| [];
		this._events[event].push(fct);
		return fct;
	};
	var unbind	= function(event, fct){
		if(this._events === undefined) 	this._events	= {};
		if( event in this._events === false  )	return;
		this._events[event].splice(this._events[event].indexOf(fct), 1);
	};
	var trigger	= function(event /* , args... */){
		if(this._events === undefined) 	this._events	= {};
		if( this._events[event] === undefined )	return;
		var tmpArray	= this._events[event].slice();
		for(var i = 0; i < tmpArray.length; i++){
			tmpArray[i].apply(this, Array.prototype.slice.call(arguments, 1))
		}
	};

	// backward compatibility
	destObj.bind	= bind;
	destObj.unbind	= unbind;
	destObj.trigger	= trigger;

	destObj.addEventListener	= function(event, fct){
		this.bind(event, fct)
		return this;	// for chained API
	}
	destObj.removeEventListener	= function(event, fct){
		this.unbind(event, fct)
		return this;	// for chained API
	}
	destObj.dispatchEvent		= function(event /* , args... */){
		this.trigger.apply(this, arguments)
		return this;
	}
};

tQuery.convert	= {};

/**
 * Convert the value into a THREE.Color object
 *
 * @return {THREE.Color} the resulting color
*/
tQuery.convert.toThreeColor	= function(value){
	if( arguments.length === 1 && typeof(value) === 'number'){
		return new THREE.Color(value);
	}else if( arguments.length === 1 && value instanceof THREE.Color ){
		return value;
	}else{
		console.assert(false, "invalid parameter");
	}
	return undefined;	// never reached - just to workaround linter complaint
};

tQuery.convert.toNumber	= function(value){
	if( arguments.length === 1 && typeof(value) === 'number'){
		return value;
	}else{
		console.assert(false, "invalid parameter");
	}
	return undefined;	// never reached - just to workaround linter complaint
};

tQuery.convert.toNumberZeroToOne	= function(value){
	if( arguments.length === 1 && typeof(value) === 'number'){
		value	= Math.min(value, 1.0);
		value	= Math.max(value, 0);
		return value;
	}else{
		console.assert(false, "invalid parameter");
	}
	return undefined;	// never reached - just to workaround linter complaint
};

tQuery.convert.toInteger	= function(value){
	if( arguments.length === 1 && typeof(value) === 'number'){
		value	= Math.floor(value);
		return value;
	}else{
		console.assert(false, "invalid parameter");
	}
	return undefined;	// never reached - just to workaround linter complaint
};

tQuery.convert.identity	= function(value){
	return value;
};

tQuery.convert.toBoolean	= function(value){
	if( arguments.length === 1 && typeof(value) === 'boolean'){
		return value;
	}else{
		console.assert(false, "invalid parameter");
	}
	return undefined;	// never reached - just to workaround linter complaint
};

tQuery.convert.toString	= function(value){
	if( arguments.length === 1 && typeof(value) === 'string'){
		return value;
	}else{
		console.assert(false, "invalid parameter");
	}
	return undefined;	// never reached - just to workaround linter complaint
};

tQuery.convert.toTexture	= function(value){
	if( arguments.length === 1 && value instanceof THREE.Texture ){
		return value;
	}else if( arguments.length === 1 && typeof(value) === 'string' ){
		return THREE.ImageUtils.loadTexture(value);
	}else if( arguments.length === 1 && (value instanceof Image || value instanceof HTMLCanvasElement) ){
		var texture		= new THREE.Texture( value );
		texture.needsUpdate	= true;
		return texture;
	}else{
		console.assert(false, "invalid parameter");
	}
	return undefined;	// never reached - just to workaround linter complaint
};
/**
 * implementation of the tQuery.Node
 *
 * @class base class for tQuery objects
 *
 * @param {Object} object an instance or an array of instance
*/
tQuery.Node	= function(object)
{
	// handle parameters
	if( object instanceof Array )	this._lists	= object;
	else if( !object )		this._lists	= [];
	else				this._lists	= [object];
	this.length	= this._lists.length;
};

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Retrieve the elements matched by the tQuery object
 *
 * @param {Function} callback the function to notify. function(element){ }.
 * 			loop interrupted if it returns false
 *
 * @returns {Boolean} return true if completed, false if interrupted
*/
tQuery.Node.prototype.get	= function(idx)
{
	if( idx === undefined )	return this._lists;
	// sanity check - it MUST be defined
	console.assert(this._lists[idx], "element not defined");
	return this._lists[idx];
};

/**
 * loop over element
 *
 * @param {Function} callback the function to notify. function(element){ }.
 * 			loop interrupted if it returns false
 *
 * @returns {Boolean} return true if completed, false if interrupted
*/
tQuery.Node.prototype.each	= function(callback)
{
	return tQuery.each(this._lists, callback)
};

/**
 * getter/setter of the back pointer
 *
 * @param {Object} back the value to return when .back() is called. optional
*/
tQuery.Node.prototype.back	= function(value)
{
	if( value  === undefined )	return this._back;
	this._back	= value;
	return this;
};

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * same as .data() in jquery
*/
tQuery.Node.prototype.data	= function(key, value)
{
	// handle the setter case
	if( value ){
		this.each(function(element){
			tQuery.data(element, key, value);
		});
		return this;	// for chained API
	}
	// return the value of the first element
	if( this.length > 0 )	return tQuery.data(this.get(0), key)
	// return undegined if the list is empty
	console.assert(this.length === 0);
	return undefined
}


/**
 * same as .data() in jquery
*/
tQuery.Node.prototype.removeData	= function(key)
{
	this.each(function(element){
		tQuery.removeData(element, key);
	});
	return this;	// for chained API
}/**
 * Handle object3D
 *
 * @class include THREE.Object3D
 *
 * @param {} object
 * @param {THREE.Object3D} rootnode
 * @returns {tQuery.*} the tQuery object created
*/
tQuery.Object3D	= function(object, root)
{
	// handle the case of selector
	if( typeof object === "string" ){
		object	= tQuery.Object3D._select(object, root);
	}

	// call parent ctor
	tQuery.Object3D.parent.constructor.call(this, object)

	// sanity check - all items MUST be THREE.Object3D
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.Object3D); });
};

/**
 * inherit from tQuery.Node
*/
tQuery.inherit(tQuery.Object3D, tQuery.Node);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.Object3D);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.Object3D, {
	eulerOrder		: tQuery.convert.toString,

	doubleSided		: tQuery.convert.toBoolean,
	flipSided		: tQuery.convert.toBoolean,

	rotationAutoUpdate	: tQuery.convert.toBoolean,
	matrixAutoUpdate	: tQuery.convert.toBoolean,
	matrixWorldNeedsUpdate	: tQuery.convert.toBoolean,
	useQuaternion		: tQuery.convert.toBoolean,

	visible			: tQuery.convert.toBoolean,

	receiveShadow		: tQuery.convert.toBoolean,
	castShadow		: tQuery.convert.toBoolean
});

/**
 * Traverse the hierarchy of Object3D.
 *
 * @returns {tQuery.Object3D} return the tQuery.Object3D itself
*/
tQuery.Object3D.prototype.traverseHierarchy	= function(callback){
	this.each(function(object3d){
		THREE.SceneUtils.traverseHierarchy(object3d, function(object3d){
			callback(object3d);
		});
	});
	return this;	// for chained API
};


//////////////////////////////////////////////////////////////////////////////////
//		geometry and material						//
//////////////////////////////////////////////////////////////////////////////////

/**
 * get geometry.
 *
 * TODO this should be move in tQuery.Mesh
 *
 * @returns {tQuery.Geometry} return the geometries from the tQuery.Object3D
*/
tQuery.Object3D.prototype.geometry	= function(value){
	var geometries	= [];
	this.each(function(object3d){
		geometries.push(object3d.geometry)
	});
	return new tQuery.Geometry(geometries).back(this);
};

/**
 * get material.
 *
 * TODO this should be move in tQuery.Mesh
 *
 * @returns {tQuery.Material} return the materials from the tQuery.Object3D
*/
tQuery.Object3D.prototype.material	= function(){
	var materials	= [];
	this.each(function(object3d){
		materials.push(object3d.material)
	});
	return new tQuery.Material(materials);
};


/**
 * Clone a Object3D
*/
tQuery.Object3D.prototype.clone	= function(){
	var clones	= [];
	this._lists.forEach(function(object3d){
		var clone	= object3d.clone();
		clones.push(clone);
	})
	return tQuery(clones)
}

//////////////////////////////////////////////////////////////////////////////////
//			addTo/removeFrom tQuery.World/tQuery.Object3d		//
//////////////////////////////////////////////////////////////////////////////////

/**
 * add all matched elements to a world
 *
 * @param {tQuery.World or tQuery.Object3D} target object to which add it
 * @returns {tQuery.Object3D} chained API
*/
tQuery.Object3D.prototype.addTo	= function(target)
{
	console.assert( target instanceof tQuery.World || target instanceof tQuery.Object3D || target instanceof THREE.Object3D )
	this.each(function(object3d){
		target.add(object3d)
	}.bind(this));
	return this;
}

/**
 * remove all matched elements from a world
 *
 * @param {tQuery.World or tQuery.Object3D} target object to which add it
 * @returns {tQuery.Object3D} chained API
*/
tQuery.Object3D.prototype.removeFrom	= function(target)
{
	console.assert( target instanceof tQuery.World || target instanceof tQuery.Object3D )
	this.each(function(tObject3d){
		target.remove(tObject3d)
	}.bind(this));
	return this;
}

/**
 * remove an element from the parent to which it is attached
 *
 * @returns {tQuery.Object3D} chained API
*/
tQuery.Object3D.prototype.detach	= function()
{
	this.each(function(object3D){
		if( !object3D.parent )	return;
		object3D.parent.remove(object3D)
	}.bind(this));
	return this;
}

//////////////////////////////////////////////////////////////////////////////////
//			addTo/removeFrom tQuery.World/tQuery.Object3d		//
//////////////////////////////////////////////////////////////////////////////////

/**
 * add all matched elements to a world
 *
 * @param {tQuery.Object3D} target object to which add it
 * @returns {tQuery.Object3D} chained API
*/
tQuery.Object3D.prototype.add	= function(object3D)
{
	if( object3D instanceof tQuery.Object3D ){
		this.each(function(object1){
			object3D.each(function(object2){
				object1.add(object2);
			})
		}.bind(this));
	}else if( object3D instanceof THREE.Object3D ){
		this.each(function(object1){
			object1.add(object3D);
		});
	}else	console.assert(false, "invalid parameter");
	return this;
}

/**
 * remove all matched elements from a world
 *
 * @param {tQuery.Object3D} object3d the object to add in this object
 * @returns {tQuery.Object3D} chained API
*/
tQuery.Object3D.prototype.remove	= function(object3D)
{
	if( object3D instanceof tQuery.Object3D ){
		this.each(function(object1){
			object3D.each(function(object2){
				object1.remove(object2);
			})
		}.bind(this));
	}else if( object3D instanceof THREE.Object3D ){
		this.each(function(object1){
			object1.remove(object3D);
		});
	}else	console.assert(false, "invalid parameter");
	return this;
}


//////////////////////////////////////////////////////////////////////////////////
//		Handle dom attribute						//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Getter/Setter for the id of the matched elements
*/
tQuery.Object3D.prototype.id	= function(value)
{
	// sanity check
	console.assert(this.length <= 1, "tQuery.Object3D.id used on multi-elements" );
	if( value !== undefined ){
		if( this.length > 0 ){
			var object3d	= this.get(0);
			object3d._tqId	= value;
		}
		return this;
	}else{
		if( this.length > 0 ){
			var object3d	= this.get(0);
			return object3d._tqId;
		}
		return undefined;
	}
};

/**
 * add a class to all matched elements
 *
 * @param {string} className the name of the class to add
 * @returns {tQuery.Object3D} chained API
*/
tQuery.Object3D.prototype.addClass	= function(className){
	this.each(function(tObject3d){
		// init ._tqClasses if needed
		tObject3d._tqClasses	= tObject3d._tqClasses	|| '';

		if( tQuery.Object3D._hasClassOne(tObject3d, className) )	return;

		tObject3d._tqClasses	+= ' '+className;
	}.bind(this));
	return this;
};

/**
 * remove a class to all matched elements
 *
 * @param {string} className the name of the class to remove
 * @returns {tQuery.Object3D} chained API
*/
tQuery.Object3D.prototype.removeClass	= function(className){
	this.each(function(tObject3d){
		tQuery.Object3D._removeClassOne(tObject3d, className);
	}.bind(this));
	return this;	// for chained api
};

/**
 * return true if any of the matched elements has this class
 *
 * @param {string} className the name of the class
 * @returns {tQuery.Object3D} true if any of the matched elements has this class, false overwise
*/
tQuery.Object3D.prototype.hasClass	= function(className){
	var completed	= this.each(function(object3d){
		// init ._tqClasses if needed
		object3d._tqClasses	= object3d._tqClasses	|| '';

		var hasClass	= tQuery.Object3D._hasClassOne(object3d, className);
		return hasClass ? false : true;
	}.bind(this));
	return completed ? false : true;
};

tQuery.Object3D._hasClassOne	= function(object3d, className){
	if( object3d._tqClasses === undefined )	return false;
	var classes	= object3d._tqClasses;
	var re		= new RegExp('(^| |\t)+('+className+')($| |\t)+');
	return classes.match(re) ? true : false;
};

tQuery.Object3D._removeClassOne	= function(object3d, className){
	if( object3d._tqClasses === undefined )	return;
	var re		= new RegExp('(^| |\t)('+className+')($| |\t)');
	object3d._tqClasses	= object3d._tqClasses.replace(re, ' ');
};

//////////////////////////////////////////////////////////////////////////////////
//			handling selection					//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Object3D._select	= function(selector, root){
	// handle parameter
	root		= root	|| tQuery.world.tScene();
	if( root instanceof tQuery.Object3D )	root	= root.get(0)
	var selectItems	= selector.split(' ').filter(function(v){ return v.length > 0;})

	// sanity check
	console.assert(root instanceof THREE.Object3D);

	var lists	= [];
	root.children.forEach(function(child){
		var nodes	= this._crawls(child, selectItems);
		// FIXME reallocate the array without need
		lists		= lists.concat(nodes);
	}.bind(this));
	return lists;
}

tQuery.Object3D._crawls	= function(root, selectItems)
{
	var result	= [];
//console.log("crawl", root, selectItems)
	console.assert( selectItems.length >= 1 );
	var match	= this._selectItemMatch(root, selectItems[0]);
//console.log("  match", match)
	var nextSelect	= match ? selectItems.slice(1) : selectItems;
//console.log("  nextSelect", nextSelect)

	if( nextSelect.length === 0 )	return [root];

	root.children.forEach(function(child){
		var nodes	= this._crawls(child, nextSelect);
		// FIXME reallocate the array without need
		result		= result.concat(nodes);
	}.bind(this));

	return result;
}

// all the geometries keywords
tQuery.Object3D._selectableGeometries	= Object.keys(THREE).filter(function(value){
	return value.match(/.+Geometry$/);}).map(function(value){ return value.replace(/Geometry$/,'').toLowerCase();
});

// all the light keywords
tQuery.Object3D._selectableLights	= Object.keys(THREE).filter(function(value){
	return value.match(/.+Light$/);}).map(function(value){ return value.replace(/Light$/,'').toLowerCase();
});

tQuery.Object3D._selectableClasses	= ['mesh', 'light'];

tQuery.Object3D._selectItemMatch	= function(object3d, selectItem)
{
	// sanity check
	console.assert( object3d instanceof THREE.Object3D );
	console.assert( typeof selectItem === 'string' );

	// parse selectItem into subItems
	var subItems	= selectItem.match(new RegExp("([^.#]+|\.[^.#]+|\#[^.#]+)", "g"));;

	// go thru each subItem
	var completed	= tQuery.each(subItems, function(subItem){
		var meta	= subItem.charAt(0);
		var suffix	= subItem.slice(1);
		//console.log("meta", meta, subItem, suffix, object3d)
		if( meta === "." ){
			var hasClass	= tQuery.Object3D._hasClassOne(object3d, suffix);
			return hasClass ? true : false;
		}else if( meta === "#" ){
			return object3d._tqId === suffix ? true : false;
		}else if( subItem === "*" ){
			return true;
		}else if( this._selectableGeometries.indexOf(subItem) !== -1 ){	// Handle geometries
			var geometry	= object3d.geometry;
			var className	= subItem.charAt(0).toUpperCase() + subItem.slice(1) + "Geometry";
			return geometry instanceof THREE[className];
		}else if( this._selectableLights.indexOf(subItem) !== -1 ){	// Handle light
			var className	= subItem.charAt(0).toUpperCase() + subItem.slice(1) + "Light";
			return object3d instanceof THREE[className];
		}else if( this._selectableClasses.indexOf(subItem) !== -1 ){	// Handle light
			var className	= subItem.charAt(0).toUpperCase() + subItem.slice(1);
			return object3d instanceof THREE[className];
		}
		// this point should never be reached
		console.assert(false, "invalid selector: "+subItem);
		return true;
	}.bind(this));

	return completed ? true : false;
}
/**
 * Handle geometry. It inherit from tQuery.Node
 *
 * @class handle THREE.Geometry. It inherit from {@link tQuery.Node}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.Geometry} object an instance or an array of instance
*/
tQuery.Geometry	= function(object)
{
	// call parent
	tQuery.Geometry.parent.constructor.call(this, object)

	// sanity check - all items MUST be THREE.Geometry
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.Geometry); });
};

/**
 * inherit from tQuery.Node
*/
tQuery.inherit(tQuery.Geometry, tQuery.Node);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.Geometry);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.Geometry, {
	hasTangents	: tQuery.convert.toBoolean,
	dynamic		: tQuery.convert.toBoolean
});/**
 * Handle material
 *
 * @class include THREE.Material. It inherit from {@link tQuery.Node}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.Material} object an instance or array of instance
*/
tQuery.Material	= function(object)
{
	// call parent
	tQuery.Material.parent.constructor.call(this, object)

	// sanity check - all items MUST be THREE.Material
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.Material); });
};

/**
 * inherit from tQuery.Node
*/
tQuery.inherit(tQuery.Material, tQuery.Node);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.Material);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.Material, {
	opacity		: tQuery.convert.toNumber,
	transparent	: tQuery.convert.toBoolean
});
/**
 * Handle light
 *
 * @class include THREE.Light. It inherit from {@link tQuery.Node}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.Light} object an instance or array of instance
*/
tQuery.Light	= function(elements)
{
	// call parent ctor
	tQuery.Light.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Light
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.Light); });
};

/**
 * inherit from tQuery.Node
 * - TODO this should inherit from tQuery.Object3D but but in inheritance
*/
tQuery.inherit(tQuery.Light, tQuery.Object3D);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.Light);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.Light, {
	color	: tQuery.convert.toThreeColor
});


/**
 * Handle mesh
 *
 * @class include THREE.Mesh. It inherit from {@link tQuery.Node}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.Mesh} object an instance or array of instance
*/
tQuery.Mesh	= function(elements)
{
	// call parent ctor
	var parent	= tQuery.Mesh.parent;
	parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Mesh
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.Mesh); });
};

/**
 * inherit from tQuery.Object3D
*/
tQuery.inherit(tQuery.Mesh, tQuery.Object3D);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.Mesh);

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * TODO to remove. this function is crap
*/
tQuery.Mesh.prototype.material	= function(value){
	var parent	= tQuery.Mesh.parent;
	// handle the getter case
	if( value == undefined )	return parent.material.call(this);
	// handle parameter polymorphism
	if( value instanceof tQuery.Material )	value	= value.get(0)
	// sanity check
	console.assert( value instanceof THREE.Material )
	// handle the setter case
	this.each(function(tMesh){
		tMesh.material	= value;
	});
	return this;	// for the chained API
}

/**
 * Create a tQuery.Sprite
 *
 * @returns {tQuery.Sprite} the create object
*/
tQuery.registerStatic('createSprite', function(opts){
	opts		= tQuery.extend(opts, {
		useScreenCoordinates	: false
	});
	var sprite	= new THREE.Sprite(opts);
	return new tQuery.Sprite(sprite)
})

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Wrapper on top of THREE.Sprite
*/
tQuery.registerStatic('Sprite', function(elements){
	// call parent ctor
	tQuery.Sprite.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Material
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.Sprite); });
});

/**
 * inherit from tQuery.Node
*/
tQuery.inherit(tQuery.Sprite, tQuery.Object3D);


/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.Sprite, {
	color			: tQuery.convert.toThreeColor,
	map			: tQuery.convert.toTexture,
	useScreenCoordinates	: tQuery.convert.toBoolean
});
//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Handle world (aka scene+camera+renderer)
 *
 * @class tQuery.World
 *
 * @param {THREE.Material} object an instance or an array of instance
*/
tQuery.World	= function(opts)
{
	// handle parameters
	opts	= opts	|| {};
	opts	= tQuery.extend(opts, {
		renderW		: window.innerWidth,
		renderH		: window.innerHeight,
		webGLNeeded	: true,
		autoRendering	: true,
		scene		: null,
		camera		: null,
		renderer	: null
	});
	this._opts	= opts;

	// update default world.
	// - TODO no sanity check ?
	// - not clear what to do with this...
	// - tQuery.world is the user world. like the camera controls
	console.assert( !tQuery.word );
	tQuery.world	= this;

	this._autoRendering	= true;

	// create a scene
	this._scene	= opts.scene	||(new THREE.Scene());

 	// create a camera in the scene
	if( !opts.camera ){
		this._camera	= new THREE.PerspectiveCamera(35, opts.renderW / opts.renderH, 0.01, 10000 );
		this._camera.position.set(0, 0, 3);
		this._scene.add(this._camera);
	}else{
		this._camera	= opts.camera;
	}

	// create the loop
	this._loop	= new tQuery.Loop();

	// hook the render function in this._loop
	this._$loopCb	= this._loop.hookOnRender(function(delta, now){
		this.render(delta);
	}.bind(this));

	// create a renderer
	if( opts.renderer ){
		this._renderer	= opts.renderer;
	}else if( tQuery.World.hasWebGL() ){
		this._renderer	= new THREE.WebGLRenderer({
			antialias		: true,	// to get smoother output
			preserveDrawingBuffer	: true	// to allow screenshot
		});
	}else if( !opts.webGLNeeded ){
		this._renderer	= new THREE.CanvasRenderer();
	}else{
		this._addGetWebGLMessage();
		throw new Error("WebGL required and not available")
	}
	this._renderer.setClearColorHex( 0xBBBBBB, 1 );
	this._renderer.setSize( opts.renderW, opts.renderH );
};

// make it pluginable
tQuery.pluginsInstanceOn(tQuery.World);

// make it eventable
tQuery.MicroeventMixin(tQuery.World.prototype)

/**
 * destructor
 */
tQuery.World.prototype.destroy	= function(){
	// microevent.js notification
	this.trigger('destroy');
	// unhook the render function in this._loop
	this._loop.unhookOnRender(this._$loopCb);
	// destroy the loop
	this._loop.destroy();
	// remove this._cameraControls if needed
	this.removeCameraControls();
	// remove renderer element
	var parent	= this._renderer.domElement.parentElement;
	parent	&& parent.removeChild(this._renderer.domElement);

	// clear the global if needed
	if( tQuery.world === this )	tQuery.world = null;
}

//////////////////////////////////////////////////////////////////////////////////
//		WebGL Support							//
//////////////////////////////////////////////////////////////////////////////////

tQuery.World._hasWebGL	= undefined;
/**
 * @returns {Boolean} true if webgl is available, false otherwise
*/
tQuery.World.hasWebGL	= function(){
	if( tQuery.World._hasWebGL !== undefined )	return tQuery.World._hasWebGL;

	// test from Detector.js
	try{
		tQuery.World._hasWebGL	= !! window.WebGLRenderingContext && !! document.createElement( 'canvas' ).getContext( 'experimental-webgl' );
	} catch( e ){
		tQuery.World._hasWebGL	= false;
	}
	return tQuery.World._hasWebGL;
};

/**
 * display 'add webgl message' - taken from detector.js
 * @param   {DOMElement?} parent dom element to which we hook it
 * @private
 */
tQuery.World.prototype._addGetWebGLMessage	= function(parent)
{
	parent	= parent || document.body;

	// message directly taken from Detector.js
	var domElement = document.createElement( 'div' );
	domElement.style.fontFamily	= 'monospace';
	domElement.style.fontSize	= '13px';
	domElement.style.textAlign	= 'center';
	domElement.style.background	= '#eee';
	domElement.style.color		= '#000';
	domElement.style.padding	= '1em';
	domElement.style.width		= '475px';
	domElement.style.margin		= '5em auto 0';
	domElement.innerHTML		= window.WebGLRenderingContext ? [
		'Your graphics card does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation">WebGL</a>.<br />',
		'Find out how to get it <a href="http://get.webgl.org/">here</a>.'
	].join( '\n' ) : [
		'Your browser does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation">WebGL</a>.<br/>',
		'Find out how to get it <a href="http://get.webgl.org/">here</a>.'
	].join( '\n' );

	parent.appendChild(domElement);
}

//////////////////////////////////////////////////////////////////////////////////
//		add/remove object3D						//
//////////////////////////////////////////////////////////////////////////////////

// TODO why not a getter/setter here
tQuery.World.prototype.setCameraControls	= function(control){
	if( this.hasCameraControls() )	this.removeCameraControls();
	this._cameraControls	= control;
	return this;	// for chained API
};

tQuery.World.prototype.getCameraControls	= function(){
	return this._cameraControls;
};

/**
 * remove the camera controls
 * @return {tQuery.World} for chained API
 */
tQuery.World.prototype.removeCameraControls	= function(){
	if( this.hasCameraControls() === false )	return this;
	this._cameraControls	= undefined;
	return this;	// for chained API
};

/**
 * test if there is a camera controls
 * @return {Boolean} true if there is, false otherwise
 */
tQuery.World.prototype.hasCameraControls	= function(){
	return this._cameraControls !== undefined ? true : false;
};

//////////////////////////////////////////////////////////////////////////////////
//		add/remove object3D						//
//////////////////////////////////////////////////////////////////////////////////

/**
 * add an object to the scene
 *
 * @param {tQuery.Object3D} object3D to add to the scene (THREE.Object3D is accepted)
*/
tQuery.World.prototype.add	= function(object3d)
{
	if( object3d instanceof tQuery.Object3D ){
		object3d.each(function(object3d){
			this._scene.add(object3d)
		}.bind(this));
	}else if( object3d instanceof THREE.Object3D ){
		this._scene.add(object3d)
	}else	console.assert(false, "invalid type");
	// for chained API
	return this;
}

/**
 * remove an object to the scene
 *
 * @param {tQuery.Object3D} object3D to add to the scene (THREE.Object3D is accepted)
*/
tQuery.World.prototype.remove	= function(object3d)
{
	if( object3d instanceof tQuery.Object3D ){
		object3d.each(function(object3d){
			this._scene.remove(object3d)
		}.bind(this));
	}else if( object3d instanceof THREE.Object3D ){
		this._scene.remove(object3d)
	}else	console.assert(false, "invalid type");
	// for chained API
	return this;
}

/**
 * append renderer domElement
 * @param  {DOMElement} domElement the domelement which will be parent
 * @return {tQuery.World} for chained API
 */
tQuery.World.prototype.appendTo	= function(domElement)
{
	domElement.appendChild(this._renderer.domElement)
	// for chained API
	return this;
}

/**
 * Start the loop
*/
tQuery.World.prototype.start	= function(){
	this._loop.start();
	return this;	// for chained API
}
/**
 * Stop the loop
*/
tQuery.World.prototype.stop	= function(){
	this._loop.stop();
	return this;	// for chained API
}

tQuery.World.prototype.loop	= function(){ return this._loop;	}

tQuery.World.prototype.tRenderer= function(){ return this._renderer;	}
tQuery.World.prototype.tScene	= function(){ return this._scene;	}
tQuery.World.prototype.tCamera	= function(){ return this._camera;	}


// backward compatible functions to remove
tQuery.World.prototype.renderer	= function(){  console.trace();console.warn("world.renderer() is ovbslete, use .tRenderer() instead");
						return this._renderer;	}
tQuery.World.prototype.camera	= function(){ console.trace();console.warn("world.camera() is obsolete, use .tCamerar() instead");
						return this._camera;	}
tQuery.World.prototype.scene	= function(){ console.trace();console.warn("world.scene() is obsolete, use .tScene() instead");
						return this._scene;	}
tQuery.World.prototype.get	= function(){ return this._scene;	}

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

tQuery.World.prototype.autoRendering	= function(value){
	if(value === undefined)	return this._autoRendering;
	this._autoRendering	= value;
	return this;
}


tQuery.World.prototype.render	= function(delta)
{
	// update the cameraControl
	if( this.hasCameraControls() )	this._cameraControls.update(delta);
	// render the scene
	if( this._autoRendering )	this._renderer.render( this._scene, this._camera );
}
//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Handle the rendering loop
 *
 * @class This class handle the rendering loop
 *
 * @param {THREE.World} world the world to display (optional)
*/
tQuery.Loop	= function()
{
	// internally if world present do that
	this._hooks	= [];
	this._lastTime	= null;
};

// make it pluginable
tQuery.pluginsInstanceOn(tQuery.Loop);

/**
 * destructor
*/
tQuery.Loop.prototype.destroy	= function()
{
	this.stop();
}

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * start looping
 *
 * @returns {tQuery.Loop} chained API
*/
tQuery.Loop.prototype.start	= function()
{
	if( this._timerId )	this.stop();
	this._timerId	= requestAnimationFrame( this._onAnimationFrame.bind(this) );
	// for chained API
	return this;
}

/**
 * stop looping
 *
 * @returns {tQuery.Loop} chained API
*/
tQuery.Loop.prototype.stop	= function()
{
	cancelAnimationFrame(this._timerId);
	this._timerId	= null;
	// for chained API
	return this;
}

tQuery.Loop.prototype._onAnimationFrame	= function()
{
	// loop on request animation loop
	// - it has to be at the begining of the function
	// - see details at http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
	this._timerId	= requestAnimationFrame( this._onAnimationFrame.bind(this) );

	// update time values
	var now		= tQuery.now()/1000;
	if( !this._lastTime )	this._lastTime = now - 1/60;
	var delta	= now - this._lastTime;
	this._lastTime	= now;

	// run all the hooks - from lower priority to higher - in order of registration
	for(var priority = 0; priority <= this._hooks.length; priority++){
		if( this._hooks[priority] === undefined )	continue;
		var callbacks	= this._hooks[priority].slice(0)
		for(var i = 0; i < callbacks.length; i++){
			callbacks[i](delta, now);
		}
	}
}

//////////////////////////////////////////////////////////////////////////////////
//		Handle the hooks						//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Loop.prototype.PRE_RENDER		= 20;
tQuery.Loop.prototype.ON_RENDER		= 50;
tQuery.Loop.prototype.POST_RENDER	= 80;

/**
 * hook a callback at a given priority
 *
 * @param {Number} priority for this callback
 * @param {Function} callback the function which will be called function(time){}
 * @returns {Function} the callback function. usefull for this._$callback = loop.hook(this._callback.bind(this))
 *                     and later loop.unhook(this._$callback)
*/
tQuery.Loop.prototype.hook	= function(priority, callback)
{
	// handle parameters
	if( typeof priority === 'function' ){
		callback	= priority;
		priority	= this.PRE_RENDER;
	}

	this._hooks[priority]	= this._hooks[priority] || [];
	console.assert(this._hooks[priority].indexOf(callback) === -1)
	this._hooks[priority].push(callback);
	return callback;
}

/**
 * unhook a callback at a given priority
 *
 * @param {Number} priority for this callback
 * @param {Function} callback the function which will be called function(time){}
 * @returns {tQuery.Loop} chained API
*/
tQuery.Loop.prototype.unhook	= function(priority, callback)
{
	// handle parameters
	if( typeof priority === 'function' ){
		callback	= priority;
		priority	= this.PRE_RENDER;
	}

	var index	= this._hooks[priority].indexOf(callback);
	console.assert(index !== -1);
	this._hooks[priority].splice(index, 1);
	this._hooks[priority].length === 0 && delete this._hooks[priority]
	// for chained API
	return this;
}


// bunch of shortcut
// - TODO should it be in a plugin ?

tQuery.Loop.prototype.hookPreRender	= function(callback){ return this.hook(this.PRE_RENDER, callback);	};
tQuery.Loop.prototype.hookOnRender	= function(callback){ return this.hook(this.ON_RENDER, callback);	};
tQuery.Loop.prototype.hookPostRender	= function(callback){ return this.hook(this.POST_RENDER, callback);	};
tQuery.Loop.prototype.unhookPreRender	= function(callback){ return this.unhook(this.PRE_RENDER, callback);	};
tQuery.Loop.prototype.unhookOnRender	= function(callback){ return this.unhook(this.ON_RENDER, callback);	};
tQuery.Loop.prototype.unhookPostRender	= function(callback){ return this.unhook(this.POST_RENDER, callback);	};
/**
 * @fileOverview plugins for tQuery.core to help creation of object
*/


//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Create tQuery.World
*/
tQuery.registerStatic('createWorld', function(opts){
	return new tQuery.World(opts);
});

/**
 * Create tQuery.World
*/
tQuery.registerStatic('createObject3D', function(){
	var object3d	= new THREE.Object3D();
	return tQuery(object3d);
});


/**
 * Create tQuery.loop
 *
 * @param {tQuery.World} world the world to display (optional)
 * @function
*/
tQuery.registerStatic('createLoop', function(world){
	return new tQuery.Loop(world);
});


tQuery.registerStatic('createDirectionalLight', function(){
	var tLight	= new THREE.DirectionalLight();
	return new tQuery.DirectionalLight([tLight]);
});

tQuery.registerStatic('createSpotLight', function(){
	var tLight	= new THREE.SpotLight();
	return new tQuery.SpotLight([tLight]);
});

tQuery.registerStatic('createPointLight', function(){
	var tLight	= new THREE.PointLight();
	return new tQuery.PointLight([tLight]);
});

tQuery.registerStatic('createAmbientLight', function(){
	var tLight	= new THREE.AmbientLight();
	return new tQuery.AmbientLight([tLight]);
});


//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * contains the default material to use when create tQuery.Object3D
 *
 * @fieldOf tQuery
 * @name defaultObject3DMaterial
*/
tQuery.registerStatic('defaultObject3DMaterial', new THREE.MeshNormalMaterial());

tQuery.Geometry.prototype.toMesh	= function(material){
	var meshes	= [];
	this.each(function(tGeometry){
		// handle paramters
		material	= material || tQuery.defaultObject3DMaterial;
		// create the THREE.Mesh
		var mesh	= new THREE.Mesh(tGeometry, material)
		// return it
		meshes.push(mesh);
	});
	return new tQuery.Mesh(meshes);
};


/**
 * Create a cube
 *
 * @returns {tQuery.Object3D} a tQuery.Object3D containing it
*/
tQuery.registerStatic('createCube', function(){
	var ctor	= THREE.CubeGeometry;
	var dflGeometry	= [1, 1, 1];
	return this._createMesh(ctor, dflGeometry, arguments)
});

tQuery.registerStatic('createTorus', function(){
	var ctor	= THREE.TorusGeometry;
	var dflGeometry	= [0.5-0.15, 0.15];
	return this._createMesh(ctor, dflGeometry, arguments)
});

tQuery.registerStatic('createVector3', function(x, y, z){
	return new THREE.Vector3(x, y, z);
});

tQuery.registerStatic('createVector2', function(x, y){
	return new THREE.Vector2(x, y);
});

tQuery.registerStatic('createSphere', function(){
	var ctor	= THREE.SphereGeometry;
	var dflGeometry	= [0.5, 32, 16];
	return this._createMesh(ctor, dflGeometry, arguments)
});

tQuery.registerStatic('createPlane', function(){
	var ctor	= THREE.PlaneGeometry;
	var dflGeometry	= [1, 1, 16, 16];
	return this._createMesh(ctor, dflGeometry, arguments)
});

tQuery.registerStatic('createCylinder', function(){
	var ctor	= THREE.CylinderGeometry;
	var dflGeometry	= [0.5, 0.5, 1, 16, 4];
	return this._createMesh(ctor, dflGeometry, arguments)
});

tQuery.registerStatic('_createMesh', function(ctor, dflGeometry, args)
{
	// convert args to array if it is instanceof Arguments
	// FIXME if( args instanceof Arguments )
	args	= Array.prototype.slice.call( args );

	// init the material
	var material	= tQuery.defaultObject3DMaterial;
	// if the last arguments is a material, use it
	if( args.length && args[args.length-1] instanceof THREE.Material ){
		material	= args.pop();
	}

	// ugly trick to get .apply() to work
	var createFn	= function(ctor, a0, a1, a2, a3, a4, a5, a6, a7){
		console.assert(arguments.length <= 9);
		//console.log("createFn", arguments)
		return new ctor(a0,a1,a2,a3,a4,a5,a6,a7);
	}
	if( args.length === 0 )	args	= dflGeometry.slice();
	args.unshift(ctor);
	var geometry	= createFn.apply(this, args);

	// set the geometry.dynamic by default
	geometry.dynamic= true;
	// create the THREE.Mesh
	var mesh	= new THREE.Mesh(geometry, material)
	// return it
	return tQuery(mesh);
});

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

tQuery.registerStatic('createAxis', function(){
	var axis	= new THREE.AxisHelper();
	axis.scale.multiplyScalar(1/100);
	return tQuery(axis);
});
/**
 * Handle ambient light
 *
 * @class include THREE.AmbientLight. It inherit from {@link tQuery.Light}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.AmbientLight} element an instance or array of instance
*/
tQuery.AmbientLight	= function(elements)
{
	// call parent ctor
	tQuery.AmbientLight.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Light
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.AmbientLight); });
};

/**
 * inherit from tQuery.Node
*/
tQuery.inherit(tQuery.AmbientLight, tQuery.Light);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.AmbientLight);
/**
 * Handle directional light
 *
 * @class include THREE.DirectionalLight. It inherit from {@link tQuery.Light}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.DirectionalLight} element an instance or array of instance
*/
tQuery.DirectionalLight	= function(elements)
{
	// call parent ctor
	tQuery.DirectionalLight.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Light
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.DirectionalLight); });
};

/**
 * inherit from tQuery.Light
*/
tQuery.inherit(tQuery.DirectionalLight, tQuery.Light);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.DirectionalLight);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.DirectionalLight, {
	intensity	: tQuery.convert.toNumber,
	distance	: tQuery.convert.toNumber,

	shadowDarkness		: tQuery.convert.toNumberZeroToOne,
	shadowBias		: tQuery.convert.toNumber,

	shadowMapWidth		: tQuery.convert.toInteger,
	shadowMapHeight		: tQuery.convert.toInteger,

	shadowCameraRight	: tQuery.convert.toNumber,
	shadowCameraLeft	: tQuery.convert.toNumber,
	shadowCameraTop		: tQuery.convert.toNumber,
	shadowCameraBottom	: tQuery.convert.toNumber,
	shadowCameraVisible	: tQuery.convert.toBoolean,

	shadowCameraNear	: tQuery.convert.toNumber,
	shadowCameraFar		: tQuery.convert.toNumber
});



/**
 * Handle directional light
 *
 * @class include THREE.PointLight. It inherit from {@link tQuery.Light}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.PointLight} element an instance or array of instance
*/
tQuery.PointLight	= function(elements)
{
	// call parent ctor
	tQuery.PointLight.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Light
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.PointLight); });
};

/**
 * inherit from tQuery.Light
*/
tQuery.inherit(tQuery.PointLight, tQuery.Light);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.PointLight);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.PointLight, {
	intensity	: tQuery.convert.toNumber,
	distance	: tQuery.convert.toNumber
});


/**
 * Handle directional light
 *
 * @class include THREE.SpotLight. It inherit from {@link tQuery.Light}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.SpotLight} element an instance or array of instance
*/
tQuery.SpotLight	= function(elements)
{
	// call parent ctor
	tQuery.SpotLight.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Light
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.SpotLight); });
};

/**
 * inherit from tQuery.Light
*/
tQuery.inherit(tQuery.SpotLight, tQuery.Light);

/**
 * Make it pluginable
*/
tQuery.pluginsInstanceOn(tQuery.SpotLight);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.SpotLight, {
	intensity	: tQuery.convert.toNumber,
	distance	: tQuery.convert.toNumber,

	angle		: tQuery.convert.toNumber,
	exponent	: tQuery.convert.toNumber,

	onlyShadow	: tQuery.convert.toBoolean,

	shadowDarkness		: tQuery.convert.toNumberZeroToOne,
	shadowBias		: tQuery.convert.toNumber,
	shadowMapWidth		: tQuery.convert.toInteger,
	shadowMapHeight		: tQuery.convert.toInteger,
	shadowCameraRight	: tQuery.convert.toNumber,
	shadowCameraLeft	: tQuery.convert.toNumber,
	shadowCameraTop		: tQuery.convert.toNumber,
	shadowCameraBottom	: tQuery.convert.toNumber,
	shadowCameraVisible	: tQuery.convert.toBoolean
});


//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Mesh.registerInstance('setBasicMaterial', function(opts){
	var material	= tQuery.createMeshBasicMaterial(opts);
	this.material( material.get(0) );
	return material.back(this);
})

tQuery.registerStatic('createMeshBasicMaterial', function(opts){
	var tMaterial	= new THREE.MeshBasicMaterial(opts);
	var material	= new tQuery.MeshBasicMaterial(tMaterial);
	return material;
});

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Handle Basic Material
 *
 * @class include THREE.MeshBasicMaterial. It inherit from {@link tQuery.Material}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.BasicMaterial} element an instance or array of instance
*/
tQuery.MeshBasicMaterial	= function(elements)
{
	// call parent ctor
	tQuery.MeshBasicMaterial.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Material
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.MeshBasicMaterial); });
};

/**
 * inherit from tQuery.Material
*/
tQuery.inherit(tQuery.MeshBasicMaterial, tQuery.Material);


/**
 * Initial code to automatically extract attribute names from THREE.Material child classes

 	var extractMaterialAttribute	= function(className){
		var parentClass	= new THREE.Material();
		var mainClass	= new THREE[className]();
		var parentProps	= Object.keys(parentClass)
		var mainProps	= Object.keys(mainClass)
		console.log("parentProps", JSON.stringify(parentProps, null, '\t'),"mainProps", JSON.stringify(mainProps, null, '\t'));
		mainProps	= mainProps.filter(function(property){
			return parentProps.indexOf(property) === -1;
		})
		console.log("mainProps", JSON.stringify(mainProps, null, '\t'));
		return mainProps;
	}
*/
/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.MeshBasicMaterial, {
	color			: tQuery.convert.toThreeColor,
	ambient			: tQuery.convert.toThreeColor,
	map			: tQuery.convert.toTexture,
	envMap			: tQuery.convert.toTexture,
	wireframe		: tQuery.convert.toBoolean,
	wireframeLinewidth	: tQuery.convert.toInteger,
	wireframeLinecap	: tQuery.convert.toString
});


//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Mesh.registerInstance('setLambertMaterial', function(opts){
	var material	= tQuery.createMeshLambertMaterial(opts);
	this.material( material.get(0) );
	return material.back(this);
})

tQuery.registerStatic('createMeshLambertMaterial', function(opts){
	var tMaterial	= new THREE.MeshLambertMaterial(opts);
	var material	= new tQuery.MeshLambertMaterial(tMaterial);
	return material;
});

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Handle directional light
 *
 * @class include THREE.LambertMaterial. It inherit from {@link tQuery.Material}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.LambertMaterial} element an instance or array of instance
*/
tQuery.MeshLambertMaterial	= function(elements)
{
	// call parent ctor
	tQuery.MeshLambertMaterial.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Material
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.MeshLambertMaterial); });
};

/**
 * inherit from tQuery.Material
*/
tQuery.inherit(tQuery.MeshLambertMaterial, tQuery.Material);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.MeshLambertMaterial, {
	color		: tQuery.convert.toThreeColor,
	ambient		: tQuery.convert.toThreeColor,
	map		: tQuery.convert.toTexture,
	bumpMap		: tQuery.convert.toTexture,
	bumpScale	: tQuery.convert.toNumber,
	side		: tQuery.convert.identity
});


//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Mesh.registerInstance('setNormalMaterial', function(opts){
	var material	= tQuery.createMeshNormalMaterial(opts);
	this.material( material.get(0) );
	return material.back(this);
})

tQuery.registerStatic('createMeshNormalMaterial', function(opts){
	var tMaterial	= new THREE.MeshNormalMaterial(opts);
	var material	= new tQuery.MeshNormalMaterial(tMaterial);
	return material;
});

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

tQuery.MeshNormalMaterial	= function(elements)
{
	// call parent ctor
	tQuery.MeshNormalMaterial.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Material
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.MeshNormalMaterial); });
};

/**
 * inherit from tQuery.Material
*/
tQuery.inherit(tQuery.MeshNormalMaterial, tQuery.Material);
//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Mesh.registerInstance('setPhongMaterial', function(opts){
	var material	= tQuery.createMeshPhongMaterial(opts);
	this.material( material.get(0) );
	return material.back(this);
})

tQuery.registerStatic('createMeshPhongMaterial', function(opts){
	var tMaterial	= new THREE.MeshPhongMaterial(opts);
	var material	= new tQuery.MeshPhongMaterial(tMaterial);
	return material;
});

//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////

/**
 * Handle directional light
 *
 * @class include THREE.PhongMaterial. It inherit from {@link tQuery.Material}
 *
 * @borrows tQuery.Node#get as this.get
 * @borrows tQuery.Node#each as this.each
 * @borrows tQuery.Node#back as this.back
 *
 * @param {THREE.PhongMaterial} element an instance or array of instance
*/
tQuery.MeshPhongMaterial	= function(elements)
{
	// call parent ctor
	tQuery.MeshPhongMaterial.parent.constructor.call(this, elements)

	// sanity check - all items MUST be THREE.Material
	this._lists.forEach(function(item){ console.assert(item instanceof THREE.MeshPhongMaterial); });
};

/**
 * inherit from tQuery.Material
*/
tQuery.inherit(tQuery.MeshPhongMaterial, tQuery.Material);

/**
 * define all acceptable attributes for this class
*/
tQuery.mixinAttributes(tQuery.MeshPhongMaterial, {
	map		: tQuery.convert.toTexture,

	color		: tQuery.convert.toThreeColor,
	ambient		: tQuery.convert.toThreeColor,
	emissive	: tQuery.convert.toThreeColor,
	specular	: tQuery.convert.toThreeColor,

	shininess	: tQuery.convert.toNumber,

	bumpMap		: tQuery.convert.toTexture,
	bumpScale	: tQuery.convert.toNumber,

	metal		: tQuery.convert.toBoolean,
	perPixel	: tQuery.convert.toBoolean
});


/**
 * @fileOverview Plugins for tQuery.Geometry: tool box to play with geometry
*/

(function(){	// TODO why is there a closure here ?

//////////////////////////////////////////////////////////////////////////////////
//		Size functions							//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Geometry.registerInstance('computeAll', function(){
	this.each(function(tGeometry){
		tGeometry.computeBoundingSphere();
		tGeometry.computeBoundingBox();
		//tGeometry.computeCentroids();
		tGeometry.computeFaceNormals();
		//tGeometry.computeVertexNormals();
		//tGeometry.computeTangents();
	});

	// return this, to get chained API
	return this;
});

/**
 * zoom a geometry
 *
 * @name zoom
 * @methodOf tQuery.Geometry
*/
tQuery.Geometry.registerInstance('scaleBy', function(vector3){
	// handle parameters
	if( typeof vector3 === "number" && arguments.length === 1 ){
		vector3	= new THREE.Vector3(vector3, vector3, vector3);
	}else if( typeof vector3 === "number" && arguments.length === 3 ){
		vector3	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	console.assert(vector3 instanceof THREE.Vector3, "Geometry.vector3 parameter error");

	// change all geometry.vertices
	this.each(function(geometry){
		for(var i = 0; i < geometry.vertices.length; i++) {
			var vertex	= geometry.vertices[i];
			vertex.multiplySelf(vector3);
		}
		// mark the vertices as dirty
		geometry.verticesNeedUpdate = true;
		geometry.computeBoundingBox();
	})

	// return this, to get chained API
	return this;
});

tQuery.Geometry.registerInstance('size', function(){
	// only on zero-or-one element
	console.assert(this.length <= 1)
	// if no element, return undefined
	if( this.length === 0 )	return undefined

	// else measure the size of the element
	var geometry	= this.get(0);
	// compute middle
	var size= new THREE.Vector3()
	size.x	= geometry.boundingBox.max.x - geometry.boundingBox.min.x;
	size.y	= geometry.boundingBox.max.y - geometry.boundingBox.min.y;
	size.z	= geometry.boundingBox.max.z - geometry.boundingBox.min.z;

	// return the just computed middle
	return size;
});

/**
*/
tQuery.Geometry.registerInstance('normalize', function(){
	// change all geometry.vertices
	this.each(function(geometry){
		var node	= tQuery(geometry);
		var size	= node.size();
		if( size.x >= size.y && size.x >= size.z ){
			node.zoom(1/size.x);
		}else if( size.y >= size.x && size.y >= size.z ){
			node.zoom(1/size.y);
		}else{
			node.zoom(1/size.z);
		}
	});
	// return this, to get chained API
	return this;
});


//////////////////////////////////////////////////////////////////////////////////
//										//
//////////////////////////////////////////////////////////////////////////////////


tQuery.Geometry.registerInstance('middlePoint', function(){
	// only on zero-or-one element
	console.assert(this.length <= 1)
	// if no element, return undegined
	if( this.length === 0 )	return undefined
	// else measure the size of the element
	var geometry	= this.get(0);
	// compute middle
	var middle	= new THREE.Vector3()
	middle.x	= ( geometry.boundingBox.max.x + geometry.boundingBox.min.x ) / 2;
	middle.y	= ( geometry.boundingBox.max.y + geometry.boundingBox.min.y ) / 2;
	middle.z	= ( geometry.boundingBox.max.z + geometry.boundingBox.min.z ) / 2;

	// return the just computed middle
	return middle;
});

//////////////////////////////////////////////////////////////////////////////////
//		move functions							//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Geometry.registerInstance('translate', function(delta){
	// handle parameters
	if( typeof delta === "number" && arguments.length === 3 ){
		delta	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	console.assert(delta instanceof THREE.Vector3, "Geometry.translate parameter error");

	// change all geometry.vertices
	this.each(function(geometry){
		// change all geometry.vertices
		for(var i = 0; i < geometry.vertices.length; i++) {
			var vertex	= geometry.vertices[i];
			vertex.addSelf(delta);
		}
		// mark the vertices as dirty
		geometry.verticesNeedUpdate = true;
		geometry.computeBoundingBox();
	})

	// return this, to get chained API
	return this;
});

tQuery.Geometry.registerInstance('rotate', function(angles, order){
	// handle parameters
	if( typeof angles === "number" && arguments.length === 3 ){
		angles	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	console.assert(angles instanceof THREE.Vector3, "Geometry.rotate parameter error");

	// set default rotation order if needed
	order	= order	|| 'XYZ';
	// compute transformation matrix
	var matrix	= new THREE.Matrix4();
	matrix.setRotationFromEuler(angles, order);

	// change all geometry.vertices
	this.each(function(geometry){
		// apply the matrix
		geometry.applyMatrix( matrix );

		// mark the vertices as dirty
		geometry.verticesNeedUpdate = true;
		geometry.computeBoundingBox();
	});

	// return this, to get chained API
	return this;
});

/**
*/
tQuery.Geometry.registerInstance('center', function(noX, noY, noZ){
	// change all geometry.vertices
	this.each(function(tGeometry){
		var geometry	= tQuery(tGeometry);
		// compute delta
		var delta 	= geometry.middlePoint().negate();
		if( noX )	delta.x	= 0;
		if( noY )	delta.y	= 0;
		if( noZ )	delta.z	= 0;

		return geometry.translate(delta)
	});
	// return this, to get chained API
	return this;
});

/**
 * Smooth the geometry using catmull-clark
 *
 * @param {Number} subdivision the number of subdivision to do
*/
tQuery.Geometry.registerInstance('smooth', function(subdivision){
	// init the modifier
	var modifier	= new THREE.SubdivisionModifier( subdivision );
	// apply it to each geometry
	this.each(function(geometry){
		// apply it
		modifier.modify( geometry )

		// mark the vertices as dirty
		geometry.verticesNeedUpdate = true;
		geometry.computeBoundingBox();
	});
	// return this, to get chained API
	return this;
});

// some shortcuts
tQuery.Geometry.registerInstance('translateX'	, function(delta){ return this.translate(delta, 0, 0);	});
tQuery.Geometry.registerInstance('translateY'	, function(delta){ return this.translate(0, delta, 0);	});
tQuery.Geometry.registerInstance('translateZ'	, function(delta){ return this.translate(0, 0, delta);	});
tQuery.Geometry.registerInstance('rotateX'	, function(angle){ return this.rotate(angle, 0, 0);	});
tQuery.Geometry.registerInstance('rotateY'	, function(angle){ return this.rotate(0, angle, 0);	});
tQuery.Geometry.registerInstance('rotateZ'	, function(angle){ return this.rotate(0, 0, angle);	});
tQuery.Geometry.registerInstance('scaleXBy'	, function(ratio){ return this.scaleBy(ratio, 1, 1);	});
tQuery.Geometry.registerInstance('scaleYBy'	, function(ratio){ return this.scaleBy(1, ratio, 1);	});
tQuery.Geometry.registerInstance('scaleZBy'	, function(ratio){ return this.scaleBy(1, 1, ratio);	});

// backward compatibility
tQuery.Geometry.registerInstance('zoom'		, function(value){return this.scaleBy(value);		});
tQuery.Geometry.registerInstance('zoomX'	, function(ratio){ return this.zoom(ratio, 1, 1);	});
tQuery.Geometry.registerInstance('zoomY'	, function(ratio){ return this.zoom(1, ratio, 1);	});
tQuery.Geometry.registerInstance('zoomZ'	, function(ratio){ return this.zoom(1, 1, ratio);	});


})();	// closure function end
/**
 * @fileOverview Plugins for tQuery.Object3D to play with .position/.rotation/.scale
*/

//////////////////////////////////////////////////////////////////////////////////
//		position 							//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Object3D.registerInstance('position', function(vector3){
	// handle the getter
	if( vector3 === undefined )	return this.get(0).position;
	// handle parameters
	if( typeof vector3 === "number" && arguments.length === 3 ){
		vector3	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	console.assert(vector3 instanceof THREE.Vector3, "Object3D.position parameter error");
	// do the operation on each node
	this.each(function(object3d){
		object3d.position.copy(vector3);
	});
	// return this, to get chained API
	return this;
});

tQuery.Object3D.registerInstance('positionX', function(scalar){
	if( scalar === undefined )	return this.get(0).position.x;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.position.x = scalar;	});
	return this;
});
tQuery.Object3D.registerInstance('positionY', function(scalar){
	if( scalar === undefined )	return this.get(0).position.y;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.position.y = scalar;	});
	return this;
});
tQuery.Object3D.registerInstance('positionZ', function(scalar){
	if( scalar === undefined )	return this.get(0).position.z;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.position.z = scalar;	});
	return this;
});

tQuery.Object3D.registerInstance('translate', function(delta){
	// handle parameters
	if( typeof delta === "number" && arguments.length === 3 ){
		delta	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	// sanity check
	console.assert(delta instanceof THREE.Vector3, "Object3D.translate parameter error");
	// do the operation on each node
	this.each(function(object3d){
		object3d.position.addSelf(delta);
	});
	// return this, to get chained API
	return this;
});

// some shortcuts
tQuery.Object3D.registerInstance('translateX'	, function(delta){ return this.translate(delta, 0, 0);	});
tQuery.Object3D.registerInstance('translateY'	, function(delta){ return this.translate(0, delta, 0);	});
tQuery.Object3D.registerInstance('translateZ'	, function(delta){ return this.translate(0, 0, delta);	});


//////////////////////////////////////////////////////////////////////////////////
//		rotation							//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Object3D.registerInstance('rotation', function(vector3){
	// handle the getter
	if( vector3 === undefined )	return this.get(0).rotation;
	// handle parameters polymorphism
	if( typeof vector3 === "number" && arguments.length === 3 ){
		vector3	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	// sanity check
	console.assert(vector3 instanceof THREE.Vector3, "Object3D.rotation parameter error");
	// do the operation on each node
	this.each(function(object3d){
		object3d.rotation.copy(vector3);
	})
	// return this, to get chained API
	return this;
});

tQuery.Object3D.registerInstance('rotationX', function(scalar){
	if( scalar === undefined )	return this.get(0).rotation.x;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.rotation.x = scalar;	});
	return this;
});
tQuery.Object3D.registerInstance('rotationY', function(scalar){
	if( scalar === undefined )	return this.get(0).rotation.y;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.rotation.y = scalar;	});
	return this;
});
tQuery.Object3D.registerInstance('rotationZ', function(scalar){
	if( scalar === undefined )	return this.get(0).rotation.z;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.rotation.z = scalar;	});
	return this;
});

tQuery.Object3D.registerInstance('rotate', function(angles){
	// handle parameter polymorphism
	if( typeof angles === "number" && arguments.length === 3 ){
		angles	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	// sanity check
	console.assert(angles instanceof THREE.Vector3, "Object3D.rotate parameter error");
	// do the operation on each node
	this.each(function(object3d){
		object3d.rotation.addSelf(angles);
	})
	// return this, to get chained API
	return this;
});


// some shortcuts
tQuery.Object3D.registerInstance('rotateX'	, function(angle){ return this.rotate(angle, 0, 0);	});
tQuery.Object3D.registerInstance('rotateY'	, function(angle){ return this.rotate(0, angle, 0);	});
tQuery.Object3D.registerInstance('rotateZ'	, function(angle){ return this.rotate(0, 0, angle);	});

//////////////////////////////////////////////////////////////////////////////////
//		scale								//
//////////////////////////////////////////////////////////////////////////////////

tQuery.Object3D.registerInstance('scale', function(vector3){
	// handle the getter
	if( vector3 === undefined )	return this.get(0).scale;
	// handle parameters
	if( typeof vector3 === "number" && arguments.length === 1 ){
		vector3	= new THREE.Vector3(vector3, vector3, vector3);
	}else if( typeof vector3 === "number" && arguments.length === 3 ){
		vector3	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	// sanity check
	console.assert(vector3 instanceof THREE.Vector3, "Object3D.scale parameter error");
	// do the operation on each node
	this.each(function(object3d){
		object3d.scale.copy(vector3);
	});
	// return this, to get chained API
	return this;
});

tQuery.Object3D.registerInstance('scaleX', function(scalar){
	if( scalar === undefined )	return this.get(0).scale.x;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.scale.x = scalar;	});
	return this;
});
tQuery.Object3D.registerInstance('scaleY', function(scalar){
	if( scalar === undefined )	return this.get(0).scale.y;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.scale.y = scalar;	});
	return this;
});
tQuery.Object3D.registerInstance('scaleZ', function(scalar){
	if( scalar === undefined )	return this.get(0).scale.z;
	console.assert(typeof scalar === "number" && arguments.length === 1);
	this.each(function(object3d){ object3d.scale.z = scalar;	});
	return this;
});

tQuery.Object3D.registerInstance('scaleBy', function(ratio){
	// handle parameters
	if( typeof ratio === "number" && arguments.length === 1 ){
		ratio	= new THREE.Vector3(ratio, ratio, ratio);
	}else if( typeof ratio === "number" && arguments.length === 3 ){
		ratio	= new THREE.Vector3(arguments[0], arguments[1], arguments[2]);
	}
	// sanity check
	console.assert(ratio instanceof THREE.Vector3, "Object3D.rotate parameter error");
	// do the operation on each node
	this.each(function(object3d){
		object3d.scale.multiplySelf(ratio);
	})
	// return this, to get chained API
	return this;
});

// some shortcuts
tQuery.Object3D.registerInstance('scaleXBy'	, function(ratio){ return this.scaleBy(ratio, 1, 1);	});
tQuery.Object3D.registerInstance('scaleYBy'	, function(ratio){ return this.scaleBy(1, ratio, 1);	});
tQuery.Object3D.registerInstance('scaleZBy'	, function(ratio){ return this.scaleBy(1, 1, ratio);	});
// backward compatibility only
tQuery.World.registerInstance('fullpage', function(){
	console.log("world.fullpage() is obsolete. use world.boilerplate() instead.");
	return this.boilerplate();
});

tQuery.World.registerInstance('boilerplate', function(opts){
	// put renderer fullpage
	var domElement	= document.body;
	domElement.style.margin		= "0";
	domElement.style.padding	= "0";
	domElement.style.overflow	= 'hidden';
	this.appendTo(domElement);
	this._renderer.setSize( domElement.offsetWidth, domElement.offsetHeight );

	// add the boilerplate
	this.addBoilerplate(opts);

	// for chained API
	return this;
});

/**
 * Define a page title
*/
tQuery.World.registerInstance('pageTitle', function(element){
	// handle parameters polymorphism
	if( typeof(element) === 'string' ){
		var element	= document.querySelector(element);
	}
	// sanity check
	console.assert( element instanceof HTMLElement, ".pageTitle(element) needs a HTMLElement");
	// set element.style
	element.style.position	= "absolute";
	element.style.width	= "100%";
	element.style.textAlign	= "center";
	element.style.fontWeight= "bolder";
	element.style.fontColor	= "white";
	element.style.paddingTop= "0.5em";
	element.style.fontFamily= "arial";
	// for chained API
	return this;
});

tQuery.World.registerInstance('addBoilerplate', function(opts){
	var _this	= this;
	// sanity check - no boilerplate is already installed
	console.assert( this.hasBoilerplate() !== true );
	// handle parameters
	opts	= tQuery.extend(opts, {
		stats		: true,
		cameraControls	: true,
		windowResize	: true,
		screenshot	: true,
		fullscreen	: true
	});
	// get the context
	var ctx	= {};

	// make tRenderer.domElement style "display: block" - by default it is inline-block
	// - so it is affected by line-height and create a white line at the bottom
	this.tRenderer().domElement.style.display = "block"

	// create the context
	tQuery.data(this, '_boilerplateCtx', ctx);

	// get some variables
	var tCamera	= this.tCamera();
	var tRenderer	= this.tRenderer();

	// add Stats.js - https://github.com/mrdoob/stats.js
	if( opts.stats ){
		ctx.stats	= new Stats();
		ctx.stats.domElement.style.position	= 'absolute';
		ctx.stats.domElement.style.bottom	= '0px';
		tRenderer.domElement.parentNode && tRenderer.domElement.parentNode.appendChild( ctx.stats.domElement );
		ctx.loopStats	= function(){
			ctx.stats.update();
		};
		this.loop().hook(ctx.loopStats);
	}

	// create a camera contol
	if( opts.cameraControls ){
		ctx.cameraControls	= new THREEx.DragPanControls(tCamera);
		this.setCameraControls(ctx.cameraControls);
	}

	// transparently support window resize
	if( opts.windowResize ){
		ctx.windowResize	= THREEx.WindowResize.bind(tRenderer, tCamera);
	}
	// allow 'p' to make screenshot
	if( opts.screenshot ){
		ctx.screenshot		= THREEx.Screenshot.bindKey(tRenderer);
	}
	// allow 'f' to go fullscreen where this feature is supported
	if( opts.fullscreen && THREEx.FullScreen.available() ){
		ctx.fullscreen	= THREEx.FullScreen.bindKey();
	}

	// bind 'destroy' event on tQuery.world
	ctx._$onDestroy	= this.bind('destroy', function(){
		if( this.hasBoilerplate() === false )	return;
		this.removeBoilerplate();
	});

	// for chained API
	return this;
});

tQuery.World.registerInstance('hasBoilerplate', function(){
	// get the context
	var ctx	= tQuery.data(this, "_boilerplateCtx")
	// return true if ctx if defined, false otherwise
	return ctx === undefined ? false : true;
});

tQuery.World.registerInstance('removeBoilerplate', function(){
	// get context
	var ctx	= tQuery.data(this, '_boilerplateCtx');
	// if not present, return now
	if( ctx === undefined )	return	this;
	// remove the context from this
	tQuery.removeData(this, '_boilerplateCtx');

	// unbind 'destroy' for tQuery.World
	this.unbind('destroy', this._$onDestroy);

	// remove stats.js
	ctx.stats		&& document.body.removeChild(ctx.stats.domElement );
	ctx.stats		&& this.loop().unhook(ctx.loopStats);
	// remove camera
	ctx.cameraControls	&& this.removeCameraControls()
	// stop windowResize
	ctx.windowResize	&& ctx.windowResize.stop();
	// unbind screenshot
	ctx.screenshot		&& ctx.screenshot.unbind();
	// unbind fullscreen
	ctx.fullscreen		&& ctx.fullscreen.unbind();
});// This THREEx helper makes it easy to handle window resize.
// It will update renderer and camera when window is resized.
//
// # Usage
//
// **Step 1**: Start updating renderer and camera
//
// ```var windowResize = THREEx.WindowResize(aRenderer, aCamera)```
//
// **Step 2**: Start updating renderer and camera
//
// ```windowResize.stop()```
// # Code

//

/** @namespace */
var THREEx	= THREEx 		|| {};

/**
 * Update renderer and camera when the window is resized
 *
 * @param {Object} renderer the renderer to update
 * @param {Object} Camera the camera to update
*/
THREEx.WindowResize	= function(renderer, camera){
	var callback	= function(){
		// notify the renderer of the size change
		renderer.setSize( window.innerWidth, window.innerHeight );
		// update the camera
		camera.aspect	= window.innerWidth / window.innerHeight;
		camera.updateProjectionMatrix();
	}
	// bind the resize event
	window.addEventListener('resize', callback, false);
	// return .stop() the function to stop watching window resize
	return {
		/**
		 * Stop watching window resize
		*/
		stop	: function(){
			window.removeEventListener('resize', callback);
		}
	};
}

THREEx.WindowResize.bind	= function(renderer, camera){
	return THREEx.WindowResize(renderer, camera);
}
/** @namespace */
var THREEx	= THREEx 		|| {};

// TODO http://29a.ch/2011/9/11/uploading-from-html5-canvas-to-imgur-data-uri
// able to upload your screenshot without running servers

// forced closure
(function(){

	/**
	 * Take a screenshot of a renderer
	 * - require WebGLRenderer to have "preserveDrawingBuffer: true" to be set
	 * - TODO is it possible to check if this variable is set ? if so check it
	 *   and make advice in the console.log
	 *   - maybe with direct access to the gl context...
	 *
	 * @param {Object} renderer to use
	 * @param {String} mimetype of the output image. default to "image/png"
	 * @param {String} dataUrl of the image
	*/
	var toDataURL	= function(renderer, mimetype)
	{
		mimetype	= mimetype	|| "image/png";
		var dataUrl	= renderer.domElement.toDataURL(mimetype);
		return dataUrl;
	}

	/**
	 * resize an image to another resolution while preserving aspect
	 *
	 * @param {String} srcUrl the url of the image to resize
	 * @param {Number} dstWidth the destination width of the image
	 * @param {Number} dstHeight the destination height of the image
	 * @param {Number} callback the callback to notify once completed with callback(newImageUrl)
	*/
	var _aspectResize	= function(srcUrl, dstW, dstH, callback){
		// to compute the width/height while keeping aspect
		var cpuScaleAspect	= function(maxW, maxH, curW, curH){
			var ratio	= curH / curW;
			if( curW >= maxW && ratio <= 1 ){
				curW	= maxW;
				curH	= maxW * ratio;
			}else if(curH >= maxH){
				curH	= maxH;
				curW	= maxH / ratio;
			}
			return { width: curW, height: curH };
		}
		// callback once the image is loaded
		var __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
		var onLoad	= __bind(function(){
			// init the canvas
			var canvas	= document.createElement('canvas');
			canvas.width	= dstW;	canvas.height	= dstH;
			var ctx		= canvas.getContext('2d');

			// TODO is this needed
			ctx.fillStyle	= "black";
			ctx.fillRect(0, 0, canvas.width, canvas.height);

			// scale the image while preserving the aspect
			var scaled	= cpuScaleAspect(canvas.width, canvas.height, image.width, image.height);

			// actually draw the image on canvas
			var offsetX	= (canvas.width  - scaled.width )/2;
			var offsetY	= (canvas.height - scaled.height)/2;
			ctx.drawImage(image, offsetX, offsetY, scaled.width, scaled.height);

			// dump the canvas to an URL
			var mimetype	= "image/png";
			var newDataUrl	= canvas.toDataURL(mimetype);
			// notify the url to the caller
			callback && callback(newDataUrl)
		}, this);

		// Create new Image object
		var image 	= new Image();
		image.onload	= onLoad;
		image.src	= srcUrl;
	}


	// Super cooked function: THREEx.Screenshot.bindKey(renderer)
	// and you are done to get screenshot on your demo

	/**
	 * Bind a key to renderer screenshot
	*/
	var bindKey	= function(renderer, opts){
		// handle parameters
		opts		= opts		|| {};
		var charCode	= opts.charCode	|| 'p'.charCodeAt(0);
		var width	= opts.width;
		var height	= opts.height;
		var callback	= opts.callback	|| function(url){
			window.open(url, "name-"+Math.random());
		};

		// callback to handle keypress
		var __bind	= function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
		var onKeyPress	= __bind(function(event){
			// return now if the KeyPress isnt for the proper charCode
			if( event.which !== charCode )	return;
			// get the renderer output
			var dataUrl	= this.toDataURL(renderer);

			if( width === undefined && height === undefined ){
				callback( dataUrl )
			}else{
				// resize it and notify the callback
				// * resize == async so if callback is a window open, it triggers the pop blocker
				_aspectResize(dataUrl, width, height, callback);
			}
		}, this);

		// listen to keypress
		// NOTE: for firefox it seems mandatory to listen to document directly
		document.addEventListener('keypress', onKeyPress, false);

		return {
			unbind	: function(){
				document.removeEventListener('keypress', onKeyPress, false);
			}
		};
	}

	// export it
	THREEx.Screenshot	= {
		toDataURL	: toDataURL,
		bindKey		: bindKey
	};
})();
// This THREEx helper makes it easy to handle the fullscreen API
// * it hides the prefix for each browser
// * it hides the little discrepencies of the various vendor API
// * at the time of this writing (nov 2011) it is available in
//   [firefox nightly](http://blog.pearce.org.nz/2011/11/firefoxs-html-full-screen-api-enabled.html),
//   [webkit nightly](http://peter.sh/2011/01/javascript-full-screen-api-navigation-timing-and-repeating-css-gradients/) and
//   [chrome stable](http://updates.html5rocks.com/2011/10/Let-Your-Content-Do-the-Talking-Fullscreen-API).

//
// # Code

//

/** @namespace */
var THREEx		= THREEx 		|| {};
THREEx.FullScreen	= THREEx.FullScreen	|| {};

/**
 * test if it is possible to have fullscreen
 *
 * @returns {Boolean} true if fullscreen API is available, false otherwise
*/
THREEx.FullScreen.available	= function()
{
	return this._hasWebkitFullScreen || this._hasMozFullScreen;
}

/**
 * test if fullscreen is currently activated
 *
 * @returns {Boolean} true if fullscreen is currently activated, false otherwise
*/
THREEx.FullScreen.activated	= function()
{
	if( this._hasWebkitFullScreen ){
		return document.webkitIsFullScreen;
	}else if( this._hasMozFullScreen ){
		return document.mozFullScreen;
	}else{
		console.assert(false);
	}
}

/**
 * Request fullscreen on a given element
 * @param {DomElement} element to make fullscreen. optional. default to document.body
*/
THREEx.FullScreen.request	= function(element)
{
	element	= element	|| document.body;
	if( this._hasWebkitFullScreen ){
		element.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
	}else if( this._hasMozFullScreen ){
		element.mozRequestFullScreen();
	}else{
		console.assert(false);
	}
}

/**
 * Cancel fullscreen
*/
THREEx.FullScreen.cancel	= function()
{
	if( this._hasWebkitFullScreen ){
		document.webkitCancelFullScreen();
	}else if( this._hasMozFullScreen ){
		document.mozCancelFullScreen();
	}else{
		console.assert(false);
	}
}


// internal functions to know which fullscreen API implementation is available
THREEx.FullScreen._hasWebkitFullScreen	= 'webkitCancelFullScreen' in document	? true : false;
THREEx.FullScreen._hasMozFullScreen	= 'mozCancelFullScreen' in document	? true : false;

/**
 * Bind a key to renderer screenshot
*/
THREEx.FullScreen.bindKey	= function(opts){
	opts		= opts		|| {};
	var charCode	= opts.charCode	|| 'f'.charCodeAt(0);
	var dblclick	= opts.dblclick !== undefined ? opts.dblclick : false;
	var element	= opts.element

	var toggle	= function(){
		if( THREEx.FullScreen.activated() ){
			THREEx.FullScreen.cancel();
		}else{
			THREEx.FullScreen.request(element);
		}
	}

	// callback to handle keypress
	var __bind	= function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
	var onKeyPress	= __bind(function(event){
		// return now if the KeyPress isnt for the proper charCode
		if( event.which !== charCode )	return;
		// toggle fullscreen
		toggle();
	}, this);

	// listen to keypress
	// NOTE: for firefox it seems mandatory to listen to document directly
	document.addEventListener('keypress', onKeyPress, false);
	// listen to dblclick
	dblclick && document.addEventListener('dblclick', toggle, false);

	return {
		unbind	: function(){
			document.removeEventListener('keypress', onKeyPress, false);
			dblclick && document.removeEventListener('dblclick', toggle, false);
		}
	};
}
/** @namespace */
var THREEx	= THREEx 		|| {};

THREEx.DragPanControls	= function(object, domElement)
{
	this._object	= object;
	this._domElement= domElement || document;

	// parameters that you can change after initialisation
	this.target	= new THREE.Vector3(0, 0, 0);
	this.speedX	= 0.03;
	this.speedY	= 0.03;
	this.rangeX	= -40;
	this.rangeY	= +40;

	// private variables
	this._mouseX	= 0;
	this._mouseY	= 0;

	var _this	= this;
	this._$onMouseMove	= function(){ _this._onMouseMove.apply(_this, arguments); };
	this._$onTouchStart	= function(){ _this._onTouchStart.apply(_this, arguments); };
	this._$onTouchMove	= function(){ _this._onTouchMove.apply(_this, arguments); };

	this._domElement.addEventListener( 'mousemove', this._$onMouseMove, false );
	this._domElement.addEventListener( 'touchstart', this._$onTouchStart,false );
	this._domElement.addEventListener( 'touchmove', this._$onTouchMove, false );
}

THREEx.DragPanControls.prototype.destroy	= function()
{
	this._domElement.removeEventListener( 'mousemove', this._$onMouseMove, false );
	this._domElement.removeEventListener( 'touchstart', this._$onTouchStart,false );
	this._domElement.removeEventListener( 'touchmove', this._$onTouchMove, false );
}

THREEx.DragPanControls.prototype.update	= function(event)
{
	this._object.position.x += ( this._mouseX * this.rangeX - this._object.position.x ) * this.speedX;
	this._object.position.y += ( this._mouseY * this.rangeY - this._object.position.y ) * this.speedY;
	this._object.lookAt( this.target );
}

THREEx.DragPanControls.prototype._onMouseMove	= function(event)
{
	this._mouseX	= ( event.clientX / window.innerWidth ) - 0.5;
	this._mouseY	= ( event.clientY / window.innerHeight) - 0.5;
}

THREEx.DragPanControls.prototype._onTouchStart	= function(event)
{
	if( event.touches.length != 1 )	return;

	// no preventDefault to get click event on ios

	this._mouseX	= ( event.touches[ 0 ].pageX / window.innerWidth ) - 0.5;
	this._mouseY	= ( event.touches[ 0 ].pageY / window.innerHeight) - 0.5;
}

THREEx.DragPanControls.prototype._onTouchMove	= function(event)
{
	if( event.touches.length != 1 )	return;

	event.preventDefault();

	this._mouseX	= ( event.touches[ 0 ].pageX / window.innerWidth ) - 0.5;
	this._mouseY	= ( event.touches[ 0 ].pageY / window.innerHeight) - 0.5;
}

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a){h=a[g],f.isArray(h)?(b.animatedProperties[g]=h[1],h=a[g]=h[0]):b.animatedProperties[g]=b.specialEasing&&b.specialEasing[g]||b.easing||"swing";if(h==="hide"&&d||h==="show"&&!d)return b.complete.call(this);c&&(g==="height"||g==="width")&&(b.overflow=[this.style.overflow,this.style.overflowX,this.style.overflowY],f.css(this,"display")==="inline"&&f.css(this,"float")==="none"&&(!f.support.inlineBlockNeedsLayout||cu(this.nodeName)==="inline"?this.style.display="inline-block":this.style.zoom=1))}b.overflow!=null&&(this.style.overflow="hidden");for(i in a)j=new f.fx(this,b,i),h=a[i],cm.test(h)?(q=f._data(this,"toggle"+i)||(h==="toggle"?d?"show":"hide":0),q?(f._data(this,"toggle"+i,q==="show"?"hide":"show"),j[q]()):j[h]()):(m=cn.exec(h),n=j.cur(),m?(o=parseFloat(m[2]),p=m[3]||(f.cssNumber[i]?"":"px"),p!=="px"&&(f.style(this,i,(o||1)+p),n=(o||1)/j.cur()*n,f.style(this,i,n+p)),m[1]&&(o=(m[1]==="-="?-1:1)*o+n),j.custom(n,o,p)):j.custom(n,h,""));return!0}var e=f.speed(b,c,d);if(f.isEmptyObject(a))return this.each(e.complete,[!1]);a=f.extend({},a);return e.queue===!1?this.each(g):this.queue(e.queue,g)},stop:function(a,c,d){typeof a!="string"&&(d=c,c=a,a=b),c&&a!==!1&&this.queue(a||"fx",[]);return this.each(function(){function h(a,b,c){var e=b[c];f.removeData(a,c,!0),e.stop(d)}var b,c=!1,e=f.timers,g=f._data(this);d||f._unmark(!0,this);if(a==null)for(b in g)g[b]&&g[b].stop&&b.indexOf(".run")===b.length-4&&h(this,g,b);else g[b=a+".run"]&&g[b].stop&&h(this,g,b);for(b=e.length;b--;)e[b].elem===this&&(a==null||e[b].queue===a)&&(d?e[b](!0):e[b].saveState(),c=!0,e.splice(b,1));(!d||!c)&&f.dequeue(this,a)})}}),f.each({slideDown:ct("show",1),slideUp:ct("hide",1),slideToggle:ct("toggle",1),fadeIn:{opacity:"show"},fadeOut:{opacity:"hide"},fadeToggle:{opacity:"toggle"}},function(a,b){f.fn[a]=function(a,c,d){return this.animate(b,a,c,d)}}),f.extend({speed:function(a,b,c){var d=a&&typeof a=="object"?f.extend({},a):{complete:c||!c&&b||f.isFunction(a)&&a,duration:a,easing:c&&b||b&&!f.isFunction(b)&&b};d.duration=f.fx.off?0:typeof d.duration=="number"?d.duration:d.duration in f.fx.speeds?f.fx.speeds[d.duration]:f.fx.speeds._default;if(d.queue==null||d.queue===!0)d.queue="fx";d.old=d.complete,d.complete=function(a){f.isFunction(d.old)&&d.old.call(this),d.queue?f.dequeue(this,d.queue):a!==!1&&f._unmark(this)};return d},easing:{linear:function(a){return a},swing:function(a){return-Math.cos(a*Math.PI)/2+.5}},timers:[],fx:function(a,b,c){this.options=b,this.elem=a,this.prop=c,b.orig=b.orig||{}}}),f.fx.prototype={update:function(){this.options.step&&this.options.step.call(this.elem,this.now,this),(f.fx.step[this.prop]||f.fx.step._default)(this)},cur:function(){if(this.elem[this.prop]!=null&&(!this.elem.style||this.elem.style[this.prop]==null))return this.elem[this.prop];var a,b=f.css(this.elem,this.prop);return isNaN(a=parseFloat(b))?!b||b==="auto"?0:b:a},custom:function(a,c,d){function h(a){return e.step(a)}var e=this,g=f.fx;this.startTime=cq||cr(),this.end=c,this.now=this.start=a,this.pos=this.state=0,this.unit=d||this.unit||(f.cssNumber[this.prop]?"":"px"),h.queue=this.options.queue,h.elem=this.elem,h.saveState=function(){f._data(e.elem,"fxshow"+e.prop)===b&&(e.options.hide?f._data(e.elem,"fxshow"+e.prop,e.start):e.options.show&&f._data(e.elem,"fxshow"+e.prop,e.end))},h()&&f.timers.push(h)&&!co&&(co=setInterval(g.tick,g.interval))},show:function(){var a=f._data(this.elem,"fxshow"+this.prop);this.options.orig[this.prop]=a||f.style(this.elem,this.prop),this.options.show=!0,a!==b?this.custom(this.cur(),a):this.custom(this.prop==="width"||this.prop==="height"?1:0,this.cur()),f(this.elem).show()},hide:function(){this.options.orig[this.prop]=f._data(this.elem,"fxshow"+this.prop)||f.style(this.elem,this.prop),this.options.hide=!0,this.custom(this.cur(),0)},step:function(a){var b,c,d,e=cq||cr(),g=!0,h=this.elem,i=this.options;if(a||e>=i.duration+this.startTime){this.now=this.end,this.pos=this.state=1,this.update(),i.animatedProperties[this.prop]=!0;for(b in i.animatedProperties)i.animatedProperties[b]!==!0&&(g=!1);if(g){i.overflow!=null&&!f.support.shrinkWrapBlocks&&f.each(["","X","Y"],function(a,b){h.style["overflow"+b]=i.overflow[a]}),i.hide&&f(h).hide();if(i.hide||i.show)for(b in i.animatedProperties)f.style(h,b,i.orig[b]),f.removeData(h,"fxshow"+b,!0),f.removeData(h,"toggle"+b,!0);d=i.complete,d&&(i.complete=!1,d.call(h))}return!1}i.duration==Infinity?this.now=e:(c=e-this.startTime,this.state=c/i.duration,this.pos=f.easing[i.animatedProperties[this.prop]](this.state,c,0,1,i.duration),this.now=this.start+(this.end-this.start)*this.pos),this.update();return!0}},f.extend(f.fx,{tick:function(){var a,b=f.timers,c=0;for(;c<b.length;c++)a=b[c],!a()&&b[c]===a&&b.splice(c--,1);b.length||f.fx.stop()},interval:13,stop:function(){clearInterval(co),co=null},speeds:{slow:600,fast:200,_default:400},step:{opacity:function(a){f.style(a.elem,"opacity",a.now)},_default:function(a){a.elem.style&&a.elem.style[a.prop]!=null?a.elem.style[a.prop]=a.now+a.unit:a.elem[a.prop]=a.now}}}),f.each(cp.concat.apply([],cp),function(a,b){b.indexOf("margin")&&(f.fx.step[b]=function(a){f.style(a.elem,b,Math.max(0,a.now)+a.unit)})}),f.expr&&f.expr.filters&&(f.expr.filters.animated=function(a){return f.grep(f.timers,function(b){return a===b.elem}).length});var cv,cw=/^t(?:able|d|h)$/i,cx=/^(?:body|html)$/i;"getBoundingClientRect"in c.documentElement?cv=function(a,b,c,d){try{d=a.getBoundingClientRect()}catch(e){}if(!d||!f.contains(c,a))return d?{top:d.top,left:d.left}:{top:0,left:0};var g=b.body,h=cy(b),i=c.clientTop||g.clientTop||0,j=c.clientLeft||g.clientLeft||0,k=h.pageYOffset||f.support.boxModel&&c.scrollTop||g.scrollTop,l=h.pageXOffset||f.support.boxModel&&c.scrollLeft||g.scrollLeft,m=d.top+k-i,n=d.left+l-j;return{top:m,left:n}}:cv=function(a,b,c){var d,e=a.offsetParent,g=a,h=b.body,i=b.defaultView,j=i?i.getComputedStyle(a,null):a.currentStyle,k=a.offsetTop,l=a.offsetLeft;while((a=a.parentNode)&&a!==h&&a!==c){if(f.support.fixedPosition&&j.position==="fixed")break;d=i?i.getComputedStyle(a,null):a.currentStyle,k-=a.scrollTop,l-=a.scrollLeft,a===e&&(k+=a.offsetTop,l+=a.offsetLeft,f.support.doesNotAddBorder&&(!f.support.doesAddBorderForTableAndCells||!cw.test(a.nodeName))&&(k+=parseFloat(d.borderTopWidth)||0,l+=parseFloat(d.borderLeftWidth)||0),g=e,e=a.offsetParent),f.support.subtractsBorderForOverflowNotVisible&&d.overflow!=="visible"&&(k+=parseFloat(d.borderTopWidth)||0,l+=parseFloat(d.borderLeftWidth)||0),j=d}if(j.position==="relative"||j.position==="static")k+=h.offsetTop,l+=h.offsetLeft;f.support.fixedPosition&&j.position==="fixed"&&(k+=Math.max(c.scrollTop,h.scrollTop),l+=Math.max(c.scrollLeft,h.scrollLeft));return{top:k,left:l}},f.fn.offset=function(a){if(arguments.length)return a===b?this:this.each(function(b){f.offset.setOffset(this,a,b)});var c=this[0],d=c&&c.ownerDocument;if(!d)return null;if(c===d.body)return f.offset.bodyOffset(c);return cv(c,d,d.documentElement)},f.offset={bodyOffset:function(a){var b=a.offsetTop,c=a.offsetLeft;f.support.doesNotIncludeMarginInBodyOffset&&(b+=parseFloat(f.css(a,"marginTop"))||0,c+=parseFloat(f.css(a,"marginLeft"))||0);return{top:b,left:c}},setOffset:function(a,b,c){var d=f.css(a,"position");d==="static"&&(a.style.position="relative");var e=f(a),g=e.offset(),h=f.css(a,"top"),i=f.css(a,"left"),j=(d==="absolute"||d==="fixed")&&f.inArray("auto",[h,i])>-1,k={},l={},m,n;j?(l=e.position(),m=l.top,n=l.left):(m=parseFloat(h)||0,n=parseFloat(i)||0),f.isFunction(b)&&(b=b.call(a,c,g)),b.top!=null&&(k.top=b.top-g.top+m),b.left!=null&&(k.left=b.left-g.left+n),"using"in b?b.using.call(a,k):e.css(k)}},f.fn.extend({position:function(){if(!this[0])return null;var a=this[0],b=this.offsetParent(),c=this.offset(),d=cx.test(b[0].nodeName)?{top:0,left:0}:b.offset();c.top-=parseFloat(f.css(a,"marginTop"))||0,c.left-=parseFloat(f.css(a,"marginLeft"))||0,d.top+=parseFloat(f.css(b[0],"borderTopWidth"))||0,d.left+=parseFloat(f.css(b[0],"borderLeftWidth"))||0;return{top:c.top-d.top,left:c.left-d.left}},offsetParent:function(){return this.map(function(){var a=this.offsetParent||c.body;while(a&&!cx.test(a.nodeName)&&f.css(a,"position")==="static")a=a.offsetParent;return a})}}),f.each({scrollLeft:"pageXOffset",scrollTop:"pageYOffset"},function(a,c){var d=/Y/.test(c);f.fn[a]=function(e){return f.access(this,function(a,e,g){var h=cy(a);if(g===b)return h?c in h?h[c]:f.support.boxModel&&h.document.documentElement[e]||h.document.body[e]:a[e];h?h.scrollTo(d?f(h).scrollLeft():g,d?g:f(h).scrollTop()):a[e]=g},a,e,arguments.length,null)}}),f.each({Height:"height",Width:"width"},function(a,c){var d="client"+a,e="scroll"+a,g="offset"+a;f.fn["inner"+a]=function(){var a=this[0];return a?a.style?parseFloat(f.css(a,c,"padding")):this[c]():null},f.fn["outer"+a]=function(a){var b=this[0];return b?b.style?parseFloat(f.css(b,c,a?"margin":"border")):this[c]():null},f.fn[c]=function(a){return f.access(this,function(a,c,h){var i,j,k,l;if(f.isWindow(a)){i=a.document,j=i.documentElement[d];return f.support.boxModel&&j||i.body&&i.body[d]||j}if(a.nodeType===9){i=a.documentElement;if(i[d]>=i[e])return i[d];return Math.max(a.body[e],i[e],a.body[g],i[g])}if(h===b){k=f.css(a,c),l=parseFloat(k);return f.isNumeric(l)?l:k}f(a).css(c,h)},c,a,arguments.length,null)}}),a.jQuery=a.$=f,typeof define=="function"&&define.amd&&define.amd.jQuery&&define("jquery",[],function(){return f})})(window);/**
 * MicroEvent - to make any js object an event emitter (server or browser)
 *
 * - pure javascript - server compatible, browser compatible
 * - dont rely on the browser doms
 * - super simple - you get it immediatly, no mistery, no magic involved
 *
 * - create a MicroEventDebug with goodies to debug
 *   - make it safer to use
*/

var MicroEvent	= function(){}
MicroEvent.prototype	= {
	bind	: function(event, fct){
		this._events = this._events || {};
		this._events[event] = this._events[event]	|| [];
		this._events[event].push(fct);
	},
	unbind	: function(event, fct){
		this._events = this._events || {};
		if( event in this._events === false  )	return;
		this._events[event].splice(this._events[event].indexOf(fct), 1);
	},
	trigger	: function(event /* , args... */){
		this._events = this._events || {};
		if( event in this._events === false  )	return;
		for(var i = 0; i < this._events[event].length; i++){
			this._events[event][i].apply(this, Array.prototype.slice.call(arguments, 1))
		}
	}
};

/**
 * mixin will delegate all MicroEvent.js function in the destination object
 *
 * - require('MicroEvent').mixin(Foobar) will make Foobar able to use MicroEvent
 *
 * @param {Object} the object which will support MicroEvent
*/
MicroEvent.mixin	= function(destObject){
	var props	= ['bind', 'unbind', 'trigger'];
	for(var i = 0; i < props.length; i ++){
		destObject.prototype[props[i]]	= MicroEvent.prototype[props[i]];
	}
}

// export in common js
if( typeof module !== "undefined" && ('exports' in module)){
	module.exports	= MicroEvent
}/*
Copyright (c) 2008 Stefan Lange-Hegermann

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
function microAjax(B,A){this.bindFunction=function(E,D){return function(){return E.apply(D,[D])}};this.stateChange=function(D){if(this.request.readyState==4){this.callbackFunction(this.request.responseText)}};this.getRequest=function(){if(window.ActiveXObject){return new ActiveXObject("Microsoft.XMLHTTP")}else{if(window.XMLHttpRequest){return new XMLHttpRequest()}}return false};this.postBody=(arguments[2]||"");this.callbackFunction=A;this.url=B;this.request=this.getRequest();if(this.request){var C=this.request;C.onreadystatechange=this.bindFunction(this.stateChange,this);if(this.postBody!==""){C.open("POST",B,true);C.setRequestHeader("X-Requested-With","XMLHttpRequest");C.setRequestHeader("Content-type","application/x-www-form-urlencoded");C.setRequestHeader("Connection","close")}else{C.open("GET",B,true)}C.send(this.postBody)}};/**
 * ThreeBox.js. More flexible tQuery boilerplate.
 */

// Math!
var π = Math.PI,
    τ = π * 2;

// Check dependencies.
(function (deps) {
  for (var i in deps) {
    if (!window[i]) throw "Error: ThreeBox requires " + deps[i];
  }
})({
  'THREE': 'Three.js',
  'tQuery': 'tQuery.js (bundle)'//,
});

// Namespace.
window.ThreeBox = {};

// Shortcut static call.
window.threeBox = function (element, options) {
  // Omit element (use body)
  if (element && !(element instanceof Node)) {
    options = element;
    element = null;
  }

  return tQuery.createWorld(options).threeBox(element, options);
};

// Make microevent methods chainable.
MicroEvent.prototype.on   = function () { MicroEvent.prototype.bind.apply(this, arguments);    return this; }
MicroEvent.prototype.emit = function () { MicroEvent.prototype.trigger.apply(this, arguments); return this; }
MicroEvent.mixin	= function(destObject){
	var props	= ['bind', 'unbind', 'trigger', 'on', 'emit'];
	for(var i = 0; i < props.length; i ++){
		destObject.prototype[props[i]]	= MicroEvent.prototype[props[i]];
	}
}

// Make world microevents nicer.
tQuery.World.prototype.on = tQuery.World.prototype.addEventListener;
tQuery.World.prototype.emit = tQuery.World.prototype.dispatchEvent;
/**
 * World.threeBox() – Create a renderer inside a DOM element.
 *
 * Based on tQuery boilerplate.
 */
tQuery.World.registerInstance('threeBox', function (element, options) {

  // Shorthand, omit element.
  if (element && !(element instanceof Node)) {
    options = element;
    element = null;
  }

  // Use body by default
  element = element || document.body;

  // Place renderer in element.
  var domElement  = element;

  if (element == document.body) {
    // Remove margins/padding on body.
    domElement.style.margin   = 0;
    domElement.style.padding  = 0;
    domElement.style.overflow = 'hidden';
  }
  else {
    // Ensure container acts as a reference frame for children.
    var style = getComputedStyle(element);
    if (element.position == 'static') {
      element.position = 'relative';
    }
  }

  // Insert into DOM.
  this.appendTo(domElement);

  // Set up ThreeBox
  this.addThreeBox(element, options || {});

  // Chained API
  return this;
});

/**
 * World.addThreeBox – Set up threebox.
 */
tQuery.World.registerInstance('addThreeBox', function (element, options) {
  // Sanity check
  console.assert(this.hasThreeBox() !== true);

  // Handle parameters
  options  = tQuery.extend(options, {
    cameraControls: false,
    cursor:         true,
    controlClass:   ThreeBox.OrbitControls,
    elementResize:  true,
    fullscreen:     true,
    screenshot:     true,
    stats:          true,
    scale:          1//,
  });

  // Make tRenderer.domElement style "display: block" - by default it is inline-block
  // - so it is affected by line-height and create a white line at the bottom
  this.tRenderer().domElement.style.display = "block"

  // Create the context
  var ctx  = {};
  tQuery.data(this, '_threeBoxContext', ctx);

  // Get some variables
  var tCamera  = this.tCamera();
  var tRenderer  = this.tRenderer();

  // Add Stats.js.
  if (options.stats) {
    ctx.stats  = new Stats();
    ctx.stats.domElement.style.position = 'absolute';
    ctx.stats.domElement.style.left     = '10px';
    ctx.stats.domElement.style.top      = '10px';
    element && element.appendChild(ctx.stats.domElement);
    ctx.loopStats  = function () {
      ctx.stats.update();
    };
    this.loop().hook(ctx.loopStats);
  }

  // Create camera controls.
  if (options.cameraControls) {
    var loop = this.loop(), render = this.render.bind(this);

    ctx.cameraControls = new options.controlClass(tCamera, element, options);
    if (ctx.cameraControls.on) {
      ctx.cameraControls.on('change', function () {
        // If not looping, ensure view is updated on interaction.
        if (!loop._timerId) {
          render();
        }
      });
    }
    this.setCameraControls(ctx.cameraControls);
  }

  // Track element / window resizes.
  if (options.elementResize) {
    ctx.elementResize = ThreeBox.ElementResize.bind(tRenderer, tCamera, element, options)
                        .on('resize', function (width, height) {
                          // Update tQuery world dimensions.
                          this._opts.renderW = width;
                          this._opts.renderH = height;

                          // Forward resize events to world.
                          this.emit('resize', width, height);
                        }.bind(this));
  }

  // Contextual mouse cursor
  if (options.cursor !== null) {
    ctx.cursor = ThreeBox.Cursor.bind(element, options);
  }

  // Allow 'p' to make screenshot.
  if (THREEx && THREEx.Screenshot && options.screenshot) {
    ctx.screenshot = THREEx.Screenshot.bindKey(tRenderer);
  }

  // Allow 'f' to go fullscreen where this feature is supported.
  if (THREEx && THREEx.FullScreen && options.fullscreen && THREEx.FullScreen.available()) {
    ctx.fullscreen = THREEx.FullScreen.bindKey();
  }

  // Bind 'destroy' event on tQuery.world.
  ctx._$onDestroy = this.bind('destroy', function () {
    if (this.hasThreeBox() === false) return;
    this.removeThreeBox();
  });

  // Chained API
  return this;
});

tQuery.World.registerInstance('hasThreeBox', function () {
  // Get threeBox context.
  var ctx  = tQuery.data(this, "_threeBoxContext")
  return ctx === undefined ? false : true;
});

tQuery.World.registerInstance('removeThreeBox', function () {
  // Get threeBox context.
  var ctx  = tQuery.data(this, '_threeBoxContext');
  if (ctx === undefined) return this;

  // Remove the context from the world.
  tQuery.removeData(this, '_threeBoxContext');

  // Unbind 'destroy' for tQuery.World
  this.unbind('destroy', this._$onDestroy);

  // remove stats.js
  if (ctx.stats) {
    document.body.removeChild(ctx.stats.domElement);
    this.loop().unhook(ctx.loopStats);
  }

  // Remove camera controls.
  ctx.cameraControls && this.removeCameraControls()
                     && ctx.cameraControls.stop();

  // Stop elementResize.
  ctx.elementResize  && ctx.elementResize.unbind();

  // Stop cursor tracking.
  ctx.cursor         && ctx.cursor.unbind();

  // Unbind screenshot
  ctx.screenshot     && ctx.screenshot.unbind();

  // Unbind fullscreen
  ctx.fullscreen     && ctx.fullscreen.unbind();
});
/**
 * Update renderer and camera when the element is resized
 *
 * @param {Object} renderer The renderer to update
 * @param {Object} camera The camera to update
 * @param {Object} element The DOM element to size to
 *
 * Based on THREEx.WindowResize.
 */
ThreeBox.ElementResize = function (renderer, camera, domElement, options) {
  this.scale = options.scale || 1;
  this.orbit = options.orbit;

  var callback = this.callback = function () {
    var width = Math.floor(domElement.offsetWidth),
        height = Math.floor(domElement.offsetHeight);

    // Size renderer appropriately.
    renderer.domElement.style.position = 'absolute';
    renderer.domElement.style.width = width + "px";
    renderer.domElement.style.height = height + "px";

    // Scale
    var ws = Math.floor(width/this.scale),
        hs = Math.floor(height/this.scale);

    // Notify the renderer of the size change.
    renderer.setSize(ws, hs);

    // Update the camera aspect and ortho extents
    camera.aspect = width / height;
    if (camera instanceof THREE.OrthographicCamera) {
      camera.top = this.orbit / 2;
      camera.bottom = -camera.top;
      camera.left = -camera.top * camera.aspect;
      camera.right = -camera.bottom * camera.aspect;
    }
    camera.updateProjectionMatrix();

    // Notify of change.
    this.emit('resize', ws, hs);
  }.bind(this);

  // Bind the resize event on the window and element.
  window.addEventListener('resize', callback, false);
  domElement.addEventListener('resize', callback, false);

  // Update size immediately.
  setTimeout(callback, 0);
}

ThreeBox.ElementResize.bind  = function (renderer, camera, element, options) {
  return new ThreeBox.ElementResize(renderer, camera, element, options);
}

/**
 * Change resize scale.
 */
ThreeBox.ElementResize.prototype.scale = function (scale) {
  this.scale = scale;
}

/**
 * Stop watching window resize
 */
ThreeBox.ElementResize.prototype.unbind = function () {
  window.removeEventListener('resize', callback);
  domElement.removeEventListener('resize', callback);
}

MicroEvent.mixin(ThreeBox.ElementResize);/**
 * Click-and-drag mouse controls with Euler angles, yaw and pitch.
 */
ThreeBox.OrbitControls = function (camera, domElement, options) {
  this.element = domElement;
  this.camera = camera;

  this.options = tQuery.extend(options, {
    phi: τ/4,
    theta: 0.3,
    orbit: 2,
    lookAt: [0, 0, 0],
    speed: 2//,
  });

  this.init();
  this.start();
  this.update();
};

ThreeBox.OrbitControls.prototype = {

  init: function () {
    this.width = this.element && this.element.offsetWidth,
    this.height = this.element && this.element.offsetHeight;
    this.phi = this.options.phi;
    this.theta = this.options.theta;
    this.orbit = this.options.orbit;
    this.speed = this.options.speed;

    this.lookAt = new THREE.Vector3();
    this.lookAt.set.apply(this.lookAt, this.options.lookAt || []);
  },

  start: function () {
    var that = this;

    this._mouseDown = function (event) {
      that.width = that.element && that.element.offsetWidth,
      that.height = that.element && that.element.offsetHeight;

      that.drag = true;
      that.lastHover = that.origin = { x: event.pageX, y: event.pageY };

      event.preventDefault();
    };

    this._mouseUp = function () {
      that.drag = false;
    };

    this._mouseMove = function (event) {
      if (that.drag) {
        var relative = { x: event.pageX - that.origin.x, y: event.pageY - that.origin.y },
            delta = { x: event.pageX - that.lastHover.x, y: event.pageY - that.lastHover.y };
        that.lastHover = { x: event.pageX, y: event.pageY };
        that.moved(that.origin, relative, delta);
      }
    };

    if (this.element) {
      this.element.addEventListener('mousedown', this._mouseDown, false);
      document.addEventListener('mouseup', this._mouseUp, false);
      document.addEventListener('mousemove', this._mouseMove, false);
    }
  },

  stop: function () {
    if (this.element) {
      this.element.removeEventListener('mousedown', this._mouseDown);
      document.removeEventListener('mouseup', this._mouseUp);
      document.removeEventListener('mousemove', this._mouseMove);
    }
  },

  moved: function (origin, relative, delta) {
    this.phi = this.phi + delta.x * this.speed / this.width;
    this.theta = Math.min(π/2, Math.max(-π/2, this.theta + delta.y * this.speed / this.height));

    this.emit('change');
  },

  update: function () {
    this.camera.position.x = Math.cos(this.phi) * Math.cos(this.theta) * this.orbit;
    this.camera.position.y = Math.sin(this.theta) * this.orbit;
    this.camera.position.z = Math.sin(this.phi) * Math.cos(this.theta) * this.orbit;

    this.camera.position.addSelf(this.lookAt);
    this.camera.lookAt(this.lookAt);
  }//,

};

ThreeBox.OrbitControls.bind  = function (camera, domElement, options) {
  return new ThreeBox.OrbitControls(camera, domElement, options);
}

MicroEvent.mixin(ThreeBox.OrbitControls);
/**
 * Set cursor shape and auto-hide with timer.
 *
 * @param {Object} element DOM element to track mouse movement on.
 * @param {Object} options Options for ThreeBox.
 */
ThreeBox.Cursor = function (element, options) {
  // Use move cursor if controls are active.
  var cursor = options.cameraControls ? 'move' : 'default';

  // Timer state
  var timer = null, ignore = false, delay = 2000;

  // Cursor auto-hiding
  function moved() {
    ignore || show();
    clearTimeout(timer);
    ignore = false;

    timer = setTimeout(function () {
      ignore = true;
      hide();
    }, delay);
  }

  function show() { element.style.cursor = cursor; }
  function hide() { element.style.cursor = 'none'; }

  // Update cursor on mouse move
  if (!options.cursor) {
    element.addEventListener('mousemove', moved);
    hide();
  }
  else {
    show();
  }

  // Return .unbind() the function to stop watching window resize.
  return {
    /**
     * Stop watching window resize
     */
    unbind: function () {
      element.removeEventListener('mousemove', moved);
    }
  };
}

ThreeBox.Cursor.bind  = function (element, options) {
  return ThreeBox.Cursor(element, options);
}
// Quick'n'dirty loader for additional .html content
ThreeBox.preload = function (files, callback) {
  // Only callback passed.
  if (files instanceof Function) {
    callback = files;
    files = [];
  }

  // Allow single file.
  files = typeof files == 'string' ? [files] : files;

  // Completion counter
  var remaining = files.length;
  var accumulate = {};
  var ping = function (data) {
    // Collect objects
    _.extend(accumulate, data || {});

    // Call callback if done.
    if (--remaining == 0) {
      callback(accumulate);
    };
  }

  // Prepare extensions
  var l = ThreeBox.preload;
  var regexps = {},
      exts = {
        'html': l.html,
        'jpg': l.image,
        'png': l.image,
        'gif': l.image,
        'mp3': l.audio,
      };
  _.each(exts, function (handler, ext) {
    regexps[ext] = new RegExp('\\.' + ext + '$');
  });

  // Load individual file
  _.each(files, function (file) {
    // Use appropriate handler based on extension
    _.each(exts, function (handler, ext) {
      if (file.match(regexps[ext])) {
        var path = file.split(/\//g);
        var name = path.pop().replace(/\.[A-Za-z0-9]+$/, '');

        handler(file, name, ping);
      }
    });
  });
};

ThreeBox.preload.html = function (file, name, callback) {
  new microAjax(file, function (res) {
    var match;

    // Insert javascript directly
    while (match = res.match(/^(<script\s*>|<script[^>]*type=['"]text\/javascript['"][^>]*>)([\s\S]+?)<\/script>$/m)) {
      try {
        /*
        var script = document.createElement('script');
        script.type = 'text/javascript';
        script.innerHTML = match[2];
        document.body.appendChild(script);
        */
        eval('(function () {' + match[2] + '})()');
      }
      catch (e) {
        console.error(e);
        console.error('While evaluating: ' + match[2]);
      }

      res = res.replace(match[0], '');
    }

    // Insert HTML via div
    if (res.replace(/\s*/g) != '') {
      var div = document.createElement('div');
      div.innerHTML = res;
      document.body.appendChild(div);
    }

    console.log('Loaded HTML ', file);
    callback();
  });
};

ThreeBox.preload.image = function (file, name, callback) {
  THREE.ImageUtils.loadTexture(file, null, function (texture) {
    var ret = {};
    ret[name] = texture;

    console.log('Loaded texture ', file);
    callback(ret);
  });
};

ThreeBox.preload.audio = function (file, name, callback) {
  // Load binary file via AJAX
  var request = new XMLHttpRequest();
  request.open("GET", file, true);
  request.responseType = "arraybuffer";

  request.onload = function () {
    var ret = {};
    ret[name] = request.response;

    console.log('Loaded audio ', file);
    callback(ret);
  };

  request.send();
}
// Check dependencies.
;(function (deps) {
  for (var i in deps) {
    if (!window[i]) throw "Error: ThreeRTT requires " + deps[i];
  }
})({
  'THREE': 'Three.js'//,
});

// Namespace
window.ThreeRTT = window.ThreeRTT || {};

// Fetch shader from <script> tag by id
// or pass through string if not exists.
ThreeRTT.getShader = function (id) {
  var elem = document.getElementById(id);
  return elem && elem.innerText || id;
};

// Simple loop helper
_.loop = function (n, callback) {
  for (var i = 0; i < n; ++i) callback(i);
};

// Fetch shader from <script> tag by id
ThreeRTT.getShader = function (id) {
  var elem = document.getElementById(id);
  return elem && (elem.innerText || elem.textContent) || id;
};
// Check for a power of two.
ThreeRTT.isPowerOfTwo = function (value) {
	return (value & (value - 1)) === 0;
};

// Convert World/Stage into RenderTarget if necessary.
ThreeRTT.toTarget = function (rtt) {
  // Stage object
  if (ThreeRTT.Stage && (rtt instanceof ThreeRTT.Stage)) return rtt.target;
  // tQuery world
  if (ThreeRTT.World && (rtt instanceof ThreeRTT.World)) return rtt.target();
  // RenderTarget or texture
  return rtt;
}

// Convert World/Stage/RenderTarget into texture uniform.
ThreeRTT.toTexture = function (rtt, i) {
  // Convert World/Stage
  rtt = ThreeRTT.toTarget(rtt);
  // Convert virtual RenderTarget object to uniform
  if (ThreeRTT.RenderTarget && (rtt instanceof ThreeRTT.RenderTarget)) return rtt.read();
  return rtt;
}

// Make microevent methods chainable.
MicroEvent.prototype.on   = function () { MicroEvent.prototype.bind.apply(this, arguments);    return this; }
MicroEvent.prototype.emit = function () { MicroEvent.prototype.trigger.apply(this, arguments); return this; }
MicroEvent.mixin	= function(destObject){
	var props	= ['bind', 'unbind', 'trigger', 'on', 'emit'];
	for(var i = 0; i < props.length; i ++){
		destObject.prototype[props[i]]	= MicroEvent.prototype[props[i]];
	}
}
/**
 * Render-to-texture stage. Contains scene/camera/target + optional full screen quad.
 */
ThreeRTT.Stage = function (renderer, options) {
  options = _.extend({
    history:  0,
    camera:   {},
    scene:    null,
  }, options);

  // Prefill aspect ratio.
  options.camera.aspect = options.camera.aspect || (options.width / options.height);

  // Create internal scene and default camera.
  this.scene = options.scene || new THREE.Scene();
  this.camera = ThreeRTT.Camera(options.camera);
	this.scene.add(this.camera);

  // Create virtual render target, passthrough options.
  this.target = new ThreeRTT.RenderTarget(renderer, options);

  // Prepare data structures.
  this.reset();

  // Set size and aspect
  this.size(options.width, options.height);
}

ThreeRTT.Stage.prototype = {

  options: function () {
    return this.target.options;
  },

  reset: function () {
    if (this.renderables) {
      _.each(this.renderables, function (surface) {
        this.scene.remove(surface);
      }.bind(this));
    }

    this.passes   = [];
    this.renderables = [];
  },

  // Add object render pass
  paint: function (object, empty) {

    // Create root to hold all objects for this pass
    var root = new THREE.Object3D();
    root.frustumCulled = false;
    root.visible = true;

    // Create a surface to render the last frame
    if (!empty) {
      var material = new ThreeRTT.FragmentMaterial(this, 'generic-fragment-texture');
      var surface = this._surface(material);
      root.add(surface);
    }

    // Add object
    root.add(object);

    // Add root to scene and insert into pass list
    this.scene.add(root);
    this.passes.push(1);
    this.renderables.push(root);
  },

  // Add iteration pass
  iterate: function (n, material) {

    // Create a surface to render the pass with
    var surface = this._surface(material);
    surface.visible = false;

    // Add surface to scene and insert into pass list
    this.scene.add(surface);
    this.passes.push(n);
    this.renderables.push(surface);

    return this;
  },

  // Add regular fragment pass
  fragment: function (material) {
    this.iterate(1, material);

    return this;
  },

  // Resize render-to-texture
  size: function (width, height) {
    width = Math.floor(width);
    height = Math.floor(height);
    this.camera.aspect = width / height;
    this.target.size(width, height);
    return this;
  },

  // Get texture for render-to-texture output delayed by n frames.
  read: function (n) {
    return this.target.read(n);
  },

  // Return uniform for reading from this render target
  uniform: function () {
    return this.target.uniform();
  },

  // Render virtual render target.
  render: function () {
	  this.target.clear();

    function toggle(object, value) {
      object.visible = value;
      _.each(object.children, function (object) { toggle(object, value); });
    }

    _.each(this.passes, function (n, i) {
      toggle(this.renderables[i], true);
      _.loop(n, function (i) {
        this.target.render(this.scene, this.camera);
      }.bind(this));
      toggle(this.renderables[i], false);
    }.bind(this));

    return this;
  },

  // Clear virtual render target.
  clear: function () {
    this.target.clear();
    return this;
  },

  // Cleanup resources.
  destroy: function () {
    this.target.deallocate();

    this.scene = null;
    this.camera = null;
    this.target = null;
  },

  // Generate full screen surface with default properties.
  _surface: function (material) {
    var surface = new THREE.Mesh(new ThreeRTT.ScreenGeometry(), {});
    surface.frustumCulled = false;
    surface.material = material;
    surface.renderDepth = Infinity;

    return surface;
  },

}
/**
 * Compose render-to-textures into a scene by adding a full screen quad
 * that uses the textures as inputs.
 */
ThreeRTT.Compose = function (rtts, fragmentShader, textures, uniforms) {
  THREE.Object3D.call(this);

  // Create full screen quad.
  var material = new ThreeRTT.FragmentMaterial(rtts, fragmentShader, textures, uniforms);
  var geometry = new ThreeRTT.ScreenGeometry();
  var mesh = this.mesh = new THREE.Mesh(geometry, material);
  mesh.frustumCulled = false;

  this.add(mesh);
}

ThreeRTT.Compose.prototype = new THREE.Object3D();
// Handy Camera factory
ThreeRTT.Camera = function (options) {
  // Camera passthrough
  if (options.constructor instanceof THREE.Camera) return options;

  // Defaults
  options = _.extend({
    aspect: 1,
    far: 10000,
    fov: 85,
    near: .01,
    ortho: false,
    scale: 1//,
  }, options);

  if (options.ortho) {
    // Note: aspect ratio is applied after.
    var s = options.scale, a = options.aspect;
    return new THREE.OrthographicCamera(
                      -s * a,
                       s * a,
                      -s,
                       s,
                       options.near,
                       options.far);
  }
  else {
    return new THREE.PerspectiveCamera(
                       options.fov,
                       options.aspect,
                       options.near,
                       options.far);
  }
};
/**
 * Virtual render target for complex render-to-texture usage.
 *
 * Contains multiple buffers for rendering from/to itself transparently
 * and/or remembering multiple frames of history.
 *
 * Set options.history to the number of frames of history needed (default 0).
 *
 * Render a frame:
 * .render(scene, camera)
 *
 * Clear the frame:
 * .clear(color, depth, stencil)
 *
 * Retrieve a virtual render target/texture to read from past frames:
 * .read()/.read(0), .read(-1), .read(-2), ..
 *
 * Set dimensions:
 * .size(width, height)
 *
 * Retrieve render target for manually rendering into:
 * .write()
 *
 * Advanced cyclic buffer manually:
 * .advance()
 */
ThreeRTT.RenderTarget = function (renderer, options) {
  this.options = options = _.extend({
    width:         256,
    height:        256,
    texture:       {},
    clear:         { color: false, depth: false, stencil: false },
    clearColor:    0xFFFFFF,
    clearAlpha:    1,
    history:       0,
    scene:         null,
    camera:        null,
    autoAdvance:   true//,
  }, options);
  this.renderer = renderer;

  // Make sure mip-mapping is disabled for non-power-of-two targets.
  if (!ThreeRTT.isPowerOfTwo(options.width) ||
      !ThreeRTT.isPowerOfTwo(options.height)) {
    if (!options.texture.minFilter) {
      options.texture.minFilter = THREE.LinearFilter;
    }
  }

  // Number of buffers = history + read/write
  this.history(this.options.history, true);

  // Set size and allocate render targets.
  this.size(options.width, options.height);

  // Clear buffer
  this.clear();
},

ThreeRTT.RenderTarget.prototype = {

  // Retrieve virtual target for reading from, n frames back.
  read: function (n) {
    // Clamp history to available buffers minus write buffer.
    n = Math.max(0, Math.min(this.options.history, Math.abs(n || 0)));
    return this.virtuals[n];
  },

  // Retrieve real render target for writing/rendering to.
  write: function () {
    return this.targets[this.index];
  },

  // Retrieve / change history count
  history: function (history, ignore) {
    if (history !== undefined) {
      this._history = history;
      this.buffers = history + 2;

      // Refresh/allocate targets.
      ignore || this.allocate();
    }
    return this._history;
  },

  // Retrieve / change size
  size: function (width, height) {
    if (width && height) {
      // Round floats to ints to help with half/quarter derived sizes.
      this.width = width = Math.floor(width);
      this.height = height = Math.floor(height);

      // Refresh/allocate targets.
      this.allocate();
    }

    return { width: this.width, height: this.height };
  },

  // Reallocate all targets.
  deallocate: function () {
    this.deallocateTargets();
  },

  // Reallocate all targets.
  allocate: function () {
    this.deallocateTargets();
    this.allocateTargets();
    this.allocateVirtuals();
  },

  // (Re)allocate render targets
  deallocateTargets: function () {
    // Deallocate real targets that were used in rendering.
    _.each(this.targets || [], function (target) {
      this.renderer.deallocateRenderTarget(target);
    }.bind(this));
  },

  // (Re)allocate render targets
  allocateTargets: function () {
    var options = this.options;
              n = this.buffers;

    // Allocate/Refresh real render targets
    var targets = this.targets = [];
    _.loop(n, function (i) {

      targets.push(new THREE.WebGLRenderTarget(
        this.width,
        this.height,
        options.texture
      ));
      targets[i].__index = i;
    }.bind(this));
  },

  // Prepare virtual render targets for reading/writing.
  allocateVirtuals: function () {
    var original = this.targets[0],
        virtuals  = this.virtuals || [];
        n = Math.max(1, this.buffers - 1);
        // One buffer reserved for writing at any given time,
        // unless there is no history.

    // Keep virtual targets around if possible.
    if (n > virtuals.length) {
      _.loop(n - virtuals.length, function () {
        virtuals.push(original.clone());
      }.bind(this));
    }
    else {
      virtuals = virtuals.slice(0, n);
    }

    // Set sizes of virtual render targets.
    _.each(virtuals, function (target, i) {
      target.width = this.width;
      target.height = this.height;
      target.__index = i;
    }.bind(this));

    this.virtuals = virtuals;

    // Reset index and re-init targets.
    this.index = -1;
    this.advance();
  },

  // Advance through buffers.
  advance: function () {
    var options  = this.options,
        targets  = this.targets,
        virtuals = this.virtuals,
        index    = this.index,
        n        = this.buffers,
        v        = virtuals.length;

    // Advance cyclic index.
    this.index = index = (index + 1) % n;

    // Point virtual render targets to last rendered frame(s) in order.
    _.loop(v, function (i) {
      var dst = virtuals[i],
          src = targets[(v - i + index) % n];

      dst.__webglTexture      = src.__webglTexture;
      dst.__webglFramebuffer  = src.__webglFramebuffer;
      dst.__webglRenderbuffer = src.__webglRenderbuffer;
      dst.__index             = src.__index;
    });

  },

  // Clear render target.
  clear: function () {
    var options = this.options,
        clear   = options.clear,
        renderer = this.renderer;

    // Read old clearing state
    var color = renderer.getClearColor().clone();
    var alpha = renderer.getClearAlpha();

    // Apple new clearing color
    renderer.setClearColorHex(options.clearColor, options.clearAlpha);
    renderer.clearTarget(this.write(), clear.color, clear.stencil, clear.depth);

    // Reset state
    renderer.setClearColor(color, alpha);
  },

  // Render to render target using given renderer.
  render: function (scene, camera) {
    // Make sure materials are given a chance to update their uniforms.
    this.emit('render', scene, camera);

    // Disable autoclear.
    var autoClear = this.renderer.autoClear;
    this.renderer.autoClear = false;

    // Clear manually (with correct flags).
    this.clear();

    // Render scene.
    this.renderer.render(scene, camera, this.write());

    // Restore autoclear to previous state.
    this.renderer.autoClear = autoClear;

    // Advance render buffers so newly rendered frame is at .read(0).
    this.options.autoAdvance && this.advance();
  },

  // Return uniform for reading from this renderTarget.
  uniform: function (i) {
    var n = this.history();
    if (n) {
      // Expose frame history as array of textures.
      var textures = [];
      _.loop(n + 1, function (j) {
        textures.push(this.read(-j));
      }.bind(this));
      return {
        type: 'tv',
        value: textures,
        count: n + 1//,
      };
    }
    else {
      // No history, expose a single read texture.
      return {
        type: 't',
        value: i,
        texture: this.read(),
        count: 1//,
      };
    }
  }//,

};

// Microeventable
MicroEvent.mixin(ThreeRTT.RenderTarget);
/**
 * Geometry for drawing a full screen quad for raytracing / render-to-texture purposes.
 */
ThreeRTT.ScreenGeometry = function () {
  return new THREE.PlaneGeometry(2, 2, 1, 1);
};
/**
 * Helper for making ShaderMaterials that read from textures and write out processed fragments.
 */
ThreeRTT.ShaderMaterial = function (renderTargets, vertexShader, fragmentShader, textures, uniforms) {

  // Autoname texture uniforms as texture1, texture2, ...
  function textureName(j) {
    return 'texture' + (j + 1);
  }

  // Allow for array of textures.
  if (textures instanceof Array) {
    var object = {};
    _.each(textures, function (texture, j) {
      object[textureName(i)] = texture;
    });
    textures = object;
  }
  // Allow passing single texture/object
  else if (textures instanceof THREE.Texture
        || textures instanceof ThreeRTT.World
        || textures instanceof THREE.WebGLRenderTarget) {
    textures = { texture1: textures };
  }

  // Accept one or more render targets as input for reading.
  if (!(renderTargets instanceof Array)) {
    renderTargets = [renderTargets];
  }

  // Accept World/Stage/RenderTarget classes
  renderTargets = _.map(renderTargets, function (target) {
    return ThreeRTT.toTarget(target);
  });

  // Add sample step uniform.
  uniforms = _.extend(uniforms || {}, {
    sampleStep: {
      type: 'v2',
      value: new THREE.Vector2()//,
    }//,
  });

  // Make uniforms for input textures.
  _.each(textures, function (texture, key) {
    uniforms[key] = {
      type: 't',
      value: ThreeRTT.toTexture(texture)//,
    };
  });

  // Use render targets as input textures unless overridden.
  _.each(renderTargets, function (target, j) {
    // Create texture1, texture2, ... uniforms.
    var key = textureName(j);
    if (target.read && !uniforms[key]) {
      uniforms[key] = {
        type: 't',
        value: target.read()//,
      };
    }
  });

  // Alias 'texture1' to 'texture'.
  if (uniforms.texture1 && !uniforms.texture) {
    uniforms.texture = uniforms.texture1;
  }

  // Update sampleStep uniform on render of source.
  var callback;
  renderTargets[0].on('render', callback = function () {
    var texture = renderTargets[0].options.texture;
    var wrapS = texture.wrapS;
    var wrapT = texture.wrapT;

    var offset = {
      1000: 0, // repeat
      1001: 1, // clamp
      1002: 0, // mirrored
    };

    var value = uniforms.sampleStep.value;

    value.x = 1 / (renderTargets[0].width - (offset[wrapS]||0));
    value.y = 1 / (renderTargets[0].height - (offset[wrapT]||0));
  });

  // Lookup shaders and build material
  var material = new THREE.ShaderMaterial({
    uniforms:       uniforms,
    vertexShader:   ThreeRTT.getShader(vertexShader || 'generic-vertex'),
    fragmentShader: ThreeRTT.getShader(fragmentShader || 'generic-fragment-texture')//,
  });

  return material;
};
/**
 * Helper for making ShaderMaterials that read from textures and write out processed fragments.
 */
ThreeRTT.FragmentMaterial = function (renderTargets, fragmentShader, textures, uniforms) {

  var material = new ThreeRTT.ShaderMaterial(
                  renderTargets, 'generic-vertex-screen', fragmentShader, textures, uniforms);

  // Disable depth buffer for RTT fragment operations by default.
  material.side = THREE.DoubleSide;
  material.depthTest = false;
  material.depthWrite = false;
  material.transparent = true;
  material.blending = THREE.NoBlending;

  return material;
};
/**
 * Specialized ShaderMaterial for downsampling a texture by a factor of 2 with anti-aliasing.
 */
ThreeRTT.DownsampleMaterial = function (renderTargetFrom, renderTargetTo) {
  var uniforms = {};

  // Accept both Stage and RenderTarget classes
  renderTargetFrom = ThreeRTT.toTarget(renderTargetFrom);
  renderTargetTo = ThreeRTT.toTarget(renderTargetTo);

  // Add uniforms.
  uniforms = _.extend(uniforms, {
    sampleAlignment: {
      type: 'v2',
      value: new THREE.Vector2()//,
    },
    texture: {
      type: 't',
      value: renderTargetFrom.read()//,
    }//,
  });

  // Update uniforms on render.
  renderTargetTo.on('render', function () {
    var from = renderTargetFrom,
        to = renderTargetTo;

    // Correction for odd downsample.
    var dx = (to.width * 2) / from.width,
        dy = (to.height * 2) / from.height;

    var value = uniforms.sampleAlignment.value;
    value.x = dx;
    value.y = dy;
  });

  // Lookup shaders and build material
  var material = new THREE.ShaderMaterial({
    uniforms:       uniforms,
    vertexShader:   ThreeRTT.getShader('rtt-vertex-downsample'),
    fragmentShader: ThreeRTT.getShader('generic-fragment-texture')//,
  });

  // Disable depth buffer for RTT operations by default.
  material.side = THREE.DoubleSide;
  material.depthTest = false;
  material.depthWrite = false;
  material.transparent = true;
  material.blending = THREE.NoBlending;

  return material;
};/**
 * Helper for making ShaderMaterials that raytrace in camera space per pixel.
 */
ThreeRTT.RaytraceMaterial = function (renderTarget, fragmentShader, textures, uniforms) {

  // Autoname texture uniforms as texture1, texture2, ...
  function textureName(j) {
    return 'texture' + (j + 1);
  }

  // Allow for array of textures.
  if (textures instanceof Array) {
    var object = {};
    _.each(textures, function (texture, j) {
      // Autoname texture uniforms as texture1, texture2, ...
      var key = textureName(j);
      object[key] = texture;
    });
  }
  // Allow passing single texture/object
  else if (textures instanceof THREE.Texture
        || textures instanceof ThreeRTT.World
        || textures instanceof THREE.WebGLRenderTarget) {
    textures = { texture1: textures };
  }

  // Accept both Stage and RenderTarget classes
  renderTarget = ThreeRTT.toTarget(renderTarget);

  // Add camera uniforms.
  uniforms = _.extend(uniforms || {}, {
    cameraViewport: {
      type: 'v2',
      value: new THREE.Vector2()//,
    },
    cameraWorld: {
      type: 'm4',
      value: new THREE.Matrix4()//,
    }//,
  });

  // Make uniforms for input textures.
  var i = 0;
  _.each(textures || [], function (texture, key) {
    uniforms[key] = {
      type: 't',
      value: i++,
      texture: ThreeRTT.toTexture(texture)//,
    };
  });

  // Update camera uniforms on render.
  renderTarget.on('render', function (scene, camera) {
    camera.updateMatrixWorld();
    if (camera.fov) {
      var tan = Math.tan(camera.fov * π / 360);
      uniforms.cameraViewport.value.set(tan * camera.aspect, tan);
    }
    if (camera.matrixWorld) {
      uniforms.cameraWorld.value = camera.matrixWorld;
    }
  });

  // Lookup shaders and build material
  return new THREE.ShaderMaterial({
    uniforms:       uniforms,
    vertexShader:   ThreeRTT.getShader('generic-vertex-screen'),
    fragmentShader: ThreeRTT.getShader(fragmentShader)//,
  });
};/**
 * Debug/testing helper that displays the given rendertargets in a grid
 */
ThreeRTT.Display = function (targets, gx, gy) {
  if (!(targets instanceof Array)) {
    targets = [targets];
  }

  this.gx = gx || targets.length;
  this.gy = gy || 1;
  this.targets = targets;
  this.n = targets.length;

  THREE.Object3D.call(this);
  this.make();
}

ThreeRTT.Display.prototype = _.extend(new THREE.Object3D(), {

  make: function () {
    var n = this.n,
        gx = this.gx,
        gy = this.gy,
        targets = this.targets;

    var igx = (gx - 1) / 2,
        igy = (gy - 1) / 2;

    var geometry = new THREE.PlaneGeometry(1, 1, 1, 1);
    var i = 0;
    for (var y = 0; i < n && y < gy; ++y) {
      for (var x = 0; i < n && x < gx; ++x, ++i) {
        var material = new THREE.MeshBasicMaterial({
          color: 0xffffff,
          map: ThreeRTT.toTexture(targets[i]),
          fog: false
        });
        material.side = THREE.DoubleSide;

        var mesh = new THREE.Mesh(geometry, material);
        mesh.renderDepth = 10000 + Math.random();
        this.add(mesh);

        if (gx > 1) mesh.position.x = -igx + x;
        if (gy > 1) mesh.position.y =  igy - y;
      }
    }
  }

});/**
 * Handle a world for rendering to texture (tQuery).
 *
 * @param world (object) World to sync rendering to.
 */
ThreeRTT.World  = function (world, options) {
  // Handle parameters.
  options = options || {};
  options = _.extend({
    autoRendering: true,
    autoSize:      !(options.width && options.height), // Default to autosize if no size specified
    order:         ++ThreeRTT.World.sequence,
    scale:         1//,
  }, options);

  // Inherit size from world
  options.width  = (!options.autoSize && options.width)
                   || ((world._opts && world._opts.renderW || 256) / options.scale);
  options.height = (!options.autoSize && options.height)
                   || ((world._opts && world._opts.renderH || 256) / options.scale);

  // Bind to world resize event for ThreeBox.js auto-resize.
  world.on('resize', function (width, height) {
    if (!options.autoSize) return;

    width /= options.scale;
    height /= options.scale;

    // Resize render target
    this.size(width, height);
  }.bind(this));

  // Remember creation state.
  this._options = options;
  this._world   = world;
  this._autoRendering  = options.autoRendering;

  // Copy renderer.
  this._renderer = world.tRenderer();

  // Create an RTT stage, pass-thru options.
  this._stage = new ThreeRTT.Stage(this._renderer, options);

  // Expose scene and camera
  this._scene  = this._stage.scene;
  this._camera = this._stage.camera;

  // Add to RTT queue at specified order.
  this.queue = ThreeRTT.RenderQueue.bind(world);
  if (options.autoRendering) this.queue.add(this);

  // Update sizing state
  this.size(options.width, options.height, true);
};

// All non-ordered passes go last, in order of addition.
ThreeRTT.World.sequence = 100000;

ThreeRTT.World.prototype = _.extend(new THREE.Object3D(), tQuery.World.prototype, {

  // Return the stage object.
  stage: function () {
    return this._stage;
  },

  // Return the virtual render target object.
  target: function () {
    return this._stage.target;
  },

  // Change the autosize behavior.
  autoSize: function (autoSize) {
    if (autoSize !== undefined) {
      this._options.autoSize = autoSize;
    }
    return this._options.autoSize;
  },

  // Adjust in response to size changes
  adjust: function (ignore) {
    var scale = this._options.scale;
    var width = this._options.width,
        height = this._options.height;

    if (this._options.autoSize) {
      // Resize immediately based off parent scale.
      var opts = this._world._opts;
      width = opts.renderW,
      height = opts.renderH;
    }

    width /= scale;
    height /= scale;

    // Compatibility with tQuery world
    this._opts = {
      renderW: width ,
      renderH: height//,
    };

    // Ignore on init.
    ignore || this._stage.size(width, height)
  },

  // Change the autoscale factor
  scale: function (scale) {
    if (scale) {
      this._options.scale = scale;
      this.adjust();
      return this;
    }

    return this._options.scale;
  },

  // Resize the RTT texture.
  size: function (width, height, ignore) {
    if (width && height) {
      this._options.width = width;
      this._options.height = height;

      // Ignore on init.
      this.adjust(ignore);
      return this;
    }

    return { width: this._options.width, height: this._options.height };
  },

  // Get stage options
  options: function () {
    return this._stage.options();
  },

  // Reset all passes
  reset: function () {
    this._stage.reset();
    return this;
  },

  // Add a painting rendering pass
  paint: function (object, empty) {
    this._stage.paint(object, empty);
    return this;
  },

  // Add an iterated rendering pass
  iterate: function (n, fragmentShader, textures, uniforms) {
    var material = fragmentShader instanceof THREE.Material
                 ? fragmentShader
                 : tQuery.createFragmentMaterial(
                    this, fragmentShader, textures, uniforms);

    this._stage.iterate(n, material);
    return this;
  },

  // Add a fragment rendering pass
  fragment: function (fragmentShader, textures, uniforms) {
    var material = fragmentShader instanceof THREE.Material
                 ? fragmentShader
                 : tQuery.createFragmentMaterial(
                    this, fragmentShader, textures, uniforms);

    this._stage.fragment(material);
    return this;
  },

  // Add a raytrace rendering pass
  raytrace: function (fragmentShader, textures, uniforms) {
    var material = fragmentShader instanceof THREE.Material
                 ? fragmentShader
                 : tQuery.createRaytraceMaterial(
                    this, fragmentShader, textures, uniforms);

    this._stage.fragment(material);
    return this;
  },

  // Add a downsample rendering pass
  downsample: function (worldFrom) {
    // Force this world to right size now if not autosizing
    if (!worldFrom.autoSize()) {
      var size = worldFrom.size();
      this._options.width = size.width;
      this._options.height = size.height;
    }

    // Force this world to right scale (will autosize)
    var scale = worldFrom.scale();
    this.scale(scale * 2);

    var material = tQuery.createDownsampleMaterial(worldFrom, this);
    this._stage.fragment(material);

    return this;
  },

  // Return the virtual texture for reading from this RTT stage.
  read: function (n) {
    return this._stage.read(n);
  },

  // Return uniform for reading from this render target
  uniform: function () {
    return this._stage.uniform();
  },

  // Render this world.
  render: function () {
    // Render to write target.
    this._stage.render();

    return this;
  },

  // Destroy/unlink this world.
  destroy: function () {
    // Remove stage.
    this._stage.destroy();
    this._stage = null;

  	// Remove self from rendering queue.
    this.queue.remove(this);

  	// Microevent.js notification
  	this.trigger('destroy');

    return this;
  }
});

// Make it pluginable.
tQuery.pluginsInstanceOn(ThreeRTT.World);

// Make it eventable.
tQuery.MicroeventMixin(ThreeRTT.World.prototype)
/**
 * Priority queue for render-to-texture stages (tQuery).
 *
 * Attach a weighted queue to the given world, rendered before the world itself.
 */
ThreeRTT.RenderQueue = function (world) {
  this.world = world;
  this.queue = [];
  this.callback = null;

  this.renderer = world.tRenderer();
};

ThreeRTT.RenderQueue.prototype = {
  // Add render stage to queue
  add: function (stage) {
    this.queue.push(stage);
    this.sort();
    this.init();
  },

  // Remove render stage from queue.
  remove: function (stage) {
    this.queue.splice(this.queue.indexOf(stage), 1);
    this.cleanup();
  },

  // Ensure we are hooked into the world's rendering pipeline.
  init: function () {
    var queue = this.queue,
        world = this.world;

    if (queue.length && !this.callback) {
      world.loop().hookPreRender(this.callback = function () {
        _.each(queue, function (stage) {
          stage.render();
        });
      });
    }
  },

  // Unhook from world if no longer needed.
  cleanup: function () {
    var queue = this.queue,
        world = this.world;

    if (!queue.length && this.callback) {
      world.loop().unhookPreRender(this.callback);
      this.callback = null;
    }
  },

  // Sort queue by given order.
  sort: function () {
    this.queue.sort(function (a, b) {
      return a.order - b.order;
    });
  }
};

/**
 * Helper to return the single RenderQueue associated with a world.
 */
ThreeRTT.RenderQueue.bind = function (world) {
  var key = '__rttRenderQueue';

  // Singleton attached to world.
  if (world[key]) {
    return world[key];
  }
  return (world[key] = new ThreeRTT.RenderQueue(world));
}
/**
 * Create a render-to-texture world for this world.
 */
tQuery.World.registerInstance('rtt', function (options) {
  return tQuery.createRTT(this, options);
});

/**
 * Add a surface showing a render-to-texture surface to this world.
 */
tQuery.World.registerInstance('compose', function (rtts, fragmentShader, textures, uniforms) {
  var compose = tQuery.createComposeRTT(rtts, fragmentShader, textures, uniforms);
  this.add(compose);
  return compose;
});

/**
 * Add a surface showing a render-to-texture surface to this world.
 */
tQuery.World.registerInstance('display', function (targets, gx, gy) {
  var display = tQuery.createDisplayRTT(targets, gx, gy);
  this.add(display);
  return display;
});

/**
 * Create a render-to-texture world (static).
 */
tQuery.registerStatic('createRTT', function (world, options) {
  // Create new RTT world.
  return new ThreeRTT.World(world, options);
});

/**
 * Composite a render-to-texture image full screen
 */
tQuery.registerStatic('createComposeRTT', function (rtts, fragmentShader, textures, uniforms) {
  return new ThreeRTT.Compose(rtts, fragmentShader, textures, uniforms);
});

/**
 * Create a display surface showing one or more textures in a grid.
 */
tQuery.registerStatic('createDisplayRTT', function (targets, gx, gy) {
  return new ThreeRTT.Display(targets, gx, gy);
});

/**
 * Create a ShaderMaterial.
 */
tQuery.registerStatic('createShaderMaterial', function (worlds, vertexShader, fragmentShader, textures, uniforms) {
  return new ThreeRTT.FragmentMaterial(worlds, vertexShader, fragmentShader, textures, uniforms);
});

/**
 * Create a FragmentMaterial.
 */
tQuery.registerStatic('createFragmentMaterial', function (worlds, fragmentShader, textures, uniforms) {
  return new ThreeRTT.FragmentMaterial(worlds, fragmentShader, textures, uniforms);
});

/**
 * Create a RaytraceMaterial.
 */
tQuery.registerStatic('createRaytraceMaterial', function (world, fragmentShader, textures, uniforms) {
  return new ThreeRTT.RaytraceMaterial(world, fragmentShader, textures, uniforms);
});

/**
 * Create a DownsampleMaterial.
 */
tQuery.registerStatic('createDownsampleMaterial', function (worldFrom, worldTo) {
  return new ThreeRTT.DownsampleMaterial(worldFrom, worldTo);
});
/**
 * ShaderGraph.js. Assemble GLSL shaders on the fly.
 */

// Check dependencies.
;(function (deps) {
  for (var i in deps) {
    if (!window[i]) throw "Error: ShaderGraph requires " + deps[i];
  }
})({
  'THREE': 'Three.js'//,
});

// Namespace.
window.ShaderGraph = {};

// Fetch shader from <script> tag by id
ShaderGraph.getShader = function (id) {
  var elem = document.getElementById(id);
  return elem && (elem.innerText || elem.textContent) || id;
};(function ($) {

/**
 * Building block for effects, wraps a shader node, guides compilation.
 */
$.Block = function (node) {
  node = node || new $.Node();
  this.node(node);

  this.children = [];
  this.parent = null;
  this.properties = {};
  this.index = ++$.Block.index;

  this.refresh();
};

$.Block.index = 0;

$.Block.prototype = {

  node: function (node) {
    if (node !== undefined) {
      this._node = node;
      return this;
    }
    return this._node;
  },

  refresh: function () {
    this._node.owner(this);
    this._node.outlets(this.outlets());
  },

  fetch: function (program, phase, outlet, priority) {
    // add outlet code to program
  }//,

};

/**
 * Building block for a GLSL shader
 */
$.Block.Snippet = function (code) {
  this.snippet = new $.Snippet(code);

  $.Block.call(this);
};

$.Block.Snippet.prototype = _.extend({}, $.Block.prototype, {

  insert: function (program, phase, priority) {
    // Compile code into program.
    $.Block.Snippet.compileCall(program, phase, this.node(), this.snippet, priority);
  },

  fetch: function (program, phase, outlet, priority) {
    // Ensure code is included in program.
    if (!program.include(this, phase)) {
      this.insert(program, phase, priority);
    }
    // Use this outlet's ID as intermediate variable name.
    return outlet.id();
  },

  outlets: function () {
    return $.Block.Snippet.makeOutlets(this.snippet);
  }//,

});

/**
 * Building block for a renderable material
 */
$.Block.Material = function (vertex, fragment) {
  this.vertex = new $.Snippet(vertex);
  this.fragment = new $.Snippet(fragment);

  $.Block.call(this);
};

$.Block.Material.prototype = _.extend({}, $.Block.prototype, {

  compile: function () {
    if (this.node().outputs.length > 0) throw "Can't compile material with outputs";

    var node = this.node();
    var program = new $.Program();

    this.insert(program, 'vertex', 0);
    this.insert(program, 'fragment', 0);

    program.compile();

    return program;
  },

  insert: function (program, phase, priority) {
    $.Block.Snippet.compileCall(program, phase, this.node(), this[phase], priority);
  },

  fetch: function (program, phase, outlet, priority) {
    // Ensure code is included only once in program.
    if (!program.include(this, phase)) {
      this.insert(program, phase, priority);
    }

    // Ensure vertex shader is added to program even if vertex outputs are not used.
    if (phase == 'fragment') {
      if (!program.include(this, 'vertex')) {
        this.insert(program, 'vertex', 0);
      }
    }

    // Use this outlet's ID as intermediate variable name.
    return outlet.id();
  },

  outlets: function () {
    var vertex   = $.Block.Snippet.makeOutlets(this.vertex);
    var fragment = $.Block.Snippet.makeOutlets(this.fragment);

    return _.union(vertex, fragment);
  }//,

});

/**
 * Make outlets based on a given signature.
 */
$.Block.Snippet.makeOutlets = function (snippet) {
  var outlets = [];

  // Since snippets are cached, cache outlets too.
  if (snippet.outlets) {
    return snippet.outlets;
  }

  var args = snippet.arguments();

  _.each(args.parameters, function (arg) {
    arg.meta = { required: true };
    arg.hint = arg.name.replace(/(In|Out)$/, '');
    arg.category = 'parameter';
    outlets.push(arg);
  });

  _.each(args.uniforms, function (arg) {
    arg.meta = { };
    arg.hint = arg.name.replace(/(In|Out)$/, '');
    arg.category = 'uniform';
    arg.inout = $.IN;
    outlets.push(arg);
  });

  snippet.outlets = outlets;

  return outlets;
}

/**
 * Compile a GLSL snippet call by tracing inputs across the graph.
 */
$.Block.Snippet.compileCall = function (program, phase, node, snippet, priority) {
  var signature = snippet.arguments();
  var args = [];

  // Assign intermediate variables.
  _.each(signature.parameters, function (arg) {
    var outlet = node.get(arg.name);
    if (arg.inout == $.IN) {
      if (outlet.input) {
        var owner = outlet.input.node.owner();

        var variable = owner.fetch(program, phase, outlet.input, priority + 1);
        program.variable(phase, variable, arg);
        args.push(variable);
      }
      else {
        console.log('Outlet', arg, outlet);
        throw ["Missing connection on outlet for " + arg.name];
      }
    }
    else if (arg.inout == $.OUT) {
      var variable = outlet.id();
      program.variable(phase, variable, arg);
      args.push(variable);
    }
  });

  // Add uniforms
  var replaced = [];
  _.each(signature.uniforms, function (arg) {
    var outlet = node.get(arg.name);

    // Replace uniform with argument
    if (outlet.input) {
      var owner = outlet.input.node.owner();

      var variable = owner.fetch(program, phase, outlet.input, priority + 1);
      program.variable(phase, variable, arg);
      args.push(variable);
      replaced.push(arg.name);
    }
    // Pass through uniform
    else {
      program.external('uniform', arg);
    }
  });

  // Add attributes
  _.each(signature.attributes, function (arg) {
    program.external('attribute', arg);
  });

  // Add varyings
  _.each(signature.varyings, function (arg) {
    program.external('varying', arg);
  });

  // Compile snippet and add to program.
  var name = ['', 'sg', phase, snippet.name, node.owner().index ].join('_');
  var code = snippet.compile(name, replaced, true);
  program.add(phase, name, args, code, priority);
};


})(ShaderGraph);(function ($) {

/**
 * Helps build graphs of blocks/nodes with chainable API.
 */
$.Factory = function () {
  this.end();
};

$.Factory.prototype = {

  snippet: function (code, op) {
    op = op || 'append';

    var block = new $.Block.Snippet(ShaderGraph.getShader(code));
    this[op](block.node());

    return this;
  },

  material: function (vertex, fragment, op) {
    op = op || 'append';

    var block = new $.Block.Material(ShaderGraph.getShader(vertex), ShaderGraph.getShader(fragment));
    this[op](block.node());

    return this;
  },

  snippetBefore: function (code) {
    this.snippet(code, 'prepend');
    return this;
  },


  materialBefore: function (vertex, fragment) {
    this.material(code, 'prepend');
    return this;
  },

  append: function (node) {
    if (!node.graph) this.graph.add(node);

    var context = this.stack[0];

    _.each(context.end, function (end) {
      end.connect(node);
    });
    if (!context.start.length) {
      context.start = [node];
    }
    context.end = [node];

    return this;
  },

  prepend: function (node) {
    if (!node.graph) this.graph.add(node);

    var context = this.stack[0];

    _.each(context.start, function (start) {
      node.connect(start);
    });
    if (!context.end.length) {
      context.end = [node];
    }
    context.start = [node];

    return this;
  },

  group: function () {
    // Inner var holds working state, outer var holds accumulated state.
    this.stack.unshift({ start: [], end: [] });
    this.stack.unshift({ start: [], end: [] });

    return this;
  },

  next: function () {
    var sub = this.stack.shift();
    var main = this.stack[0];

    main.start = main.start.concat(sub.start);
    main.end   = main.end.concat(sub.end);

    this.stack.unshift({ start: [], end: [] });

    return this;
  },

  combine: function () {
    if (this.stack.length <= 2) throw "Popping factory stack too far.";

    this.next();
    this.stack.shift();

    var sub = this.stack.shift(),
        main = this.stack[0];

    _.each(sub.start, function (to) {
      _.each(main.end, function (from) {
        from.connect(to, true);
      });
    });
    main.end = sub.end;

    return this;
  },

  end: function () {
    var graph = this.graph;

    this.graph = new $.Graph();
    this.stack = [];
    this.group();

    // Add compile shortcut.
    if (graph) {
      graph.compile = function () {
        return graph.tail().owner().compile();
      };
    }

    return graph;
  }//,
};


})(ShaderGraph);
(function ($) {

/**
 * Model of a shader program as it's being built.
 *
 * Is passed around and accumulates data, after which .compile() is called to finalize.
 */
$.Program = function () {
  this.calls = { vertex: {}, fragment: {} };
  this.variables = { vertex: {}, fragment: {} };
  this.externals = {};

  this.compiled = false;
  this.attributes = {};
  this.uniforms = {};
  this.vertexShader = '';
  this.fragmentShader = '';

  this.includes = { vertex: [], fragment: [] };
}

// TODO Add support for array types.
$.Program.types = {
  'f':  'float',
  'v2': 'vec2',
  'v3': 'vec3',
  'v4': 'vec4',
  'm3': 'mat3',
  'm4': 'mat4',
  't':  'sampler2D'//,
};

$.Program.prototype = {

  include: function (object, phase) {
    if (this.includes[phase].indexOf(object) >= 0) {
      return true;
    }
    this.includes[phase].push(object);
    return false;
  },

  external: function (category, arg) {
    arg = _.extend({ category: category }, arg);
    this.externals[arg.name] = arg;
  },

  variable: function (phase, name, arg) {
    arg = _.extend({}, arg, { name: name });
    this.variables[phase][name] = arg;
  },

  add: function (phase, name, args, code, priority) {
    var call = this.calls[phase][name];
    if (call) {
      call.priority = Math.min(call.priority, priority);
    }
    else {
      this.calls[phase][name] = { name: name, args: args, code: code, priority: priority };
    }
  },

  compile: function () {
    // Prepare uniform/attribute definitions for Three.js
    _.each(this.externals, function (e) {
      if (e.category == 'uniform') {
        this.uniforms[e.name] = {
          type: e.type,
          value: e.value//,
        };
      }
      if (e.category == 'attribute') {
        this.attributes[e.name] = {
          type: e.type,
          value: []//,
        };
      }
    }.bind(this));

    // Prepare vertex and fragment bodies.
    _.each([ 'vertex', 'fragment' ], function (phase) {

      // Build combined header without redundant definitions.
      var header = [];
      _.each(this.externals, function (e) {
        // Exclude vertex attributes from fragment shader.
        if (e.category == 'attribute' && phase == 'fragment') return;

        // Add definition
        header.push([e.category, e.signature, ';'].join(' '));
      }.bind(this));
      header = header.join("\n");

      var sorted = _.toArray(this.calls[phase]);
      var library = [ header ];

      // Start main function.
      var main = [ 'void main() {'];

      // Add variable definitions.
      _.each(this.variables[phase], function (variable) {
        main.push([ $.Program.types[variable.type], variable.name, ';' ].join(' '));
      });

      // Add calls.
      sorted.sort(function (a, b) {
        return b.priority - a.priority;
      });
      _.each(sorted, function (call) {
        library.push(call.code);
        main.push([ call.name, '(', call.args.join(','), ');' ].join(''))
      });
      main.push('}');

      // Build shader body
      this[phase + 'Shader'] = [ library.join("\n"), main.join("\n") ].join("\n");
    }.bind(this));

    this.compiled = true;
  },

  material: function () {
    if (!this.compiled) throw "Fetching material from uncompiled program.";
    return new THREE.ShaderMaterial({
      uniforms: this.uniforms,
      vertexShader: this.vertex,
      fragmentShader: this.fragment//,
    });
  }//,

};

})(ShaderGraph);(function ($) {

/**
 * Parse a snippet of GLSL code so it can be composed into a shader.
 *
 * Must contain a single function with in/out parameters, returning void.
 */
$.Snippet = function (code) {

  // Only need to parse each snippet once.
  if ($.Snippet.cache[code]) {
    return $.Snippet.cache[code];
  }
  else {
    $.Snippet.cache[code] = this;
  }

  this.code = code;

  this.attributes = [];
  this.uniforms   = [];
  this.varyings   = [];
  this.parameters = [];
  this.signature  = '';
  this.body       = '';

  this.parseCode(code);
}

$.Snippet.cache = {};

$.Snippet.types = {
  'float':       'f',
  'vec2':        'v2',
  'vec3':        'v3',
  'vec4':        'v4',
  'mat3':        'm3',
  'mat4':        'm4',
  'sampler2D':   't',
  'samplerCube': 't'//,
};

$.Snippet.defaults = {
  'float':       0,
  'vec2':        new THREE.Vector3(),
  'vec3':        new THREE.Vector3(),
  'vec4':        new THREE.Vector4(),
  'mat4':        new THREE.Matrix4(),
  'sampler2D':   0,
  'samplerCube': 0//,
};

$.Snippet.prototype = {

  compile: function (name, replaced, bodyOnly) {
    // Build updated function signature.
    var signature = this.signature.slice();
    var header = [];
    replaced = replaced || [];

    // Prepare uniforms
    _.each(this.uniforms, function (item) {
      if (replaced.indexOf(item.name) >= 0) {
        signature.push(item.signature);
      }
      else if (!bodyOnly) {
        header.push(['uniform', item.signature].join(' '));
      }
    });

    // Prepare attributes
    !bodyOnly && _.each(this.attributes, function (item) {
      header.push(['attribute', item.signature].join(' '));
    });

    // Prepare varyings
    !bodyOnly && _.each(this.varyings, function (item) {
      header.push(['varying', item.signature].join(' '));
    });

    // Insert new signature into body
    var body = this.body.replace(/\s*void\s+([A-Za-z0-9]+)\s*\([^\)]*\)/g, ['void', name + '(', signature.join(', '), ')'].join(' '));

    // Assemble code
    header.push(body);
    return header.join(';\n')
  },

  arguments: function () {
    return {
      uniforms: this.uniforms,
      varyings: this.varyings,
      attributes: this.attributes,
      parameters: this.parameters//,
    };
  },

  type: function (type, array) {
    type = ($.Snippet.types[type] || 'f') + (array ? 'v' : '');
    type = type == 'fv' ? 'fv1' : type;
    return type;
  },

  parseAttribute: function (match) {
    var signature = match[1],
        type = match[2],
        name = match[3],
        array = match[4];

    this.attributes.push({
      name: name,
      type: this.type(type, array),
      signature: signature//,
    });
  },

  parseUniform: function (match) {
    var signature = match[1],
        type = match[2],
        name = match[3],
        array = match[4];

    this.uniforms.push({
      name: name,
      type: this.type(type, array),
      value: $.Snippet.defaults[type] || 0,
      signature: signature//,
    });
  },

  parseVarying: function (match) {
    var signature = match[1],
        type = match[2],
        name = match[3],
        array = match[4];

    this.varyings.push({
      name: name,
      type: this.type(type, array),
      signature: signature//,
    });
  },

  parseSignature: function (match) {
    this.name = match[1];

    // Ignore empty signature
    var signature = match[2].replace(/^\s*$/g, '');
    if (signature.length == 0) {
      this.signature = [];
      return;
    }

    // Parse out arguments.
    var arguments = this.signature = signature.split(',');
    _.each(arguments, function (definition) {
      var match = /((?:(in|out|inout)\s+)?([A-Za-z0-9]+)\s+([A-Za-z0-9_]+)\s*(?:\[([^\]]+)\])?)(?:$|(?=;))/.exec(definition);

      var signature = match[1],
          inout = match[2],
          type = match[3],
          name = match[4],
          array = match[5];

      var inouts = {
        'in': $.IN,
        'out': $.OUT,
        'inout': $.INOUT//,
      };

      this.parameters.push({
        inout: inouts[inout || 'in'],
        name: name,
        type: this.type(type, array),
        signature: signature//,
      });
    }.bind(this));
  },

  parseCode: function (code) {
    function findAll(re, string) {
      if (!re.global) throw "Can't findAll non-global regexp";
      var match, all = [];
      while (match = re.exec(string)) {
        all.push(match);
      };
      return all;
    }

    // Remove all comments and normalize newlines
    code = code.replace(/\r\n?/g, '\n').replace(/\/\/[^\n]*\n/g, ' ').replace(/\/\*(.|\n)*?\*\//g, ' ');

    // Find all attributes/uniforms/varying + function signature
    var attributes = findAll(/(?:^|;)\s*attribute\s+(([A-Za-z0-9]+)\s+([A-Za-z0-9_]+)\s*(?:\[([^\]]+)\])?)(?:$|(?=;))/g, code);
    var uniforms = findAll(/(?:^|;)\s*uniform\s+(([A-Za-z0-9]+)\s+([A-Za-z0-9_]+)\s*(?:\[([^\]]+)\])?)(?:$|(?=;))/g, code);
    var varyings = findAll(/(?:^|;)\s*varying\s+(([A-Za-z0-9]+)\s+([[A-Za-z0-9_]+)\s*(?:\[([^\]]+)\])?)(?:$|(?=;))/g, code);
    var signature = findAll(/(?:^|;)\s*void\s+([A-Za-z0-9]+)\s*\(([^\)]*)\)\s*{/g, code);

    if (!signature[0]) throw "Could not parse shader snippet. Must contain a void-returning function with in/outs: " + code;

    // Process uniforms/varyings and remove from source.
    var matches = {
      parseAttribute: attributes,
      parseUniform:   uniforms,
      parseVarying:   varyings//,
    };
    var body = code;
    _.each(matches, function (set, key) {
      _.each(set, function (item) {
        this[key](item);
        body = body.replace(item[0], '');
      }.bind(this));
    }.bind(this));
    body = body.replace(/^\s*;/, '');

    // Process function signature.
    this.parseSignature(signature[0]);
    this.body = body;
  }//,

};

})(ShaderGraph);
(function ($) {

/**
 * Graph of shader nodes.
 */
$.Graph = function (nodes, parent) {
  this.parent = parent || null;
  this.nodes = [];
  nodes && this.add(nodes);
};

$.Graph.prototype = {

  iterate: function (callback) {
    _.each(this.nodes, function (node) {
      callback(node, node._owner);
    });
  },

  exposed: function () {
    var exposed = [];
    this.iterate(function (node) {
      _.each(node.outlets(), function (outlet) {
        if (outlet.exposed) {
          exposed.push(outlet);
        }
      });
    });
    return exposed;
  },

  inputs: function () {
    var inputs = [];
    this.iterate(function (node) {
      _.each(node.inputs, function (outlet) {
        if (outlet.input == null) {
          inputs.push(outlet);
        }
      });
    });
    return inputs;
  },

  outputs: function () {
    var outputs = [];
    this.iterate(function (node) {
      _.each(node.outputs, function (outlet) {
        if (outlet.output.length == 0) {
          outputs.push(outlet);
        }
      });
    });
    return outputs;
  },

  tail: function () {
    return this.nodes[this.nodes.length - 1];
  },

  add: function (node) {

    // Array syntax.
    if (node.constructor == Array) return _.each(node, function (node) { this.add(node); }.bind(this));

    // Sanity check.
    if (node.graph) throw "Adding node to two graphs at once";

    // Link node to graph.
    node.link(this);

    // Add node to list
    this.nodes.push(node);
  },

  remove: function (node, ignore) {
    // Array syntax.
    var that = this;
    if (node.constructor == Array) return _.each(node, function (node) { that.remove(node); });

    // Sanity check.
    if (node.graph != this) throw "Removing node from wrong graph.";

    // Disconnect all outlets
    ignore || node.disconnect();

    // Remove node from list.
    this.nodes.splice(this.nodes.indexOf(node), 1);
  }//,
};

$.IN = 0;
$.OUT = 1;
$.INOUT = 2;

})(ShaderGraph);
(function ($) {

/**
 * Node in shader graph.
 */
$.Node = function (owner, outlets) {
  this.graph = null;
  this.inputs = [];
  this.outputs = [];
  this._outlets = {};

  this.owner(owner);
  this.outlets(outlets);
};

$.Node.prototype = {

  // Set/get object represented by the node.
  owner: function (owner) {
    if (owner !== undefined) {
      // Setter
      this._owner = owner;

      // Chain
      return this;
    }
    // Getter
    return this._owner;
  },

  // Notify: become part of the given graph
  link: function (graph) {
    this.graph = graph;
  },

  // Retrieve input
  getIn: function (name) {
    return this.get(name, $.IN);
  },

  // Retrieve output
  getOut: function (name) {
    return this.get(name, $.OUT);
  },

  // Find outlet by name.
  get: function (name, inout) {
    if (inout === undefined) {
      return this.get(name, $.IN) || this.get(name, $.OUT);
    }
    return this._outlets[[name, inout].join('-')];
  },

  // Return hash key for outlet
  key: function (outlet) {
    return [outlet.name, outlet.inout].join('-');
  },

  // Set new outlet definition
  outlets: function (outlets) {
    if (outlets !== undefined) {
      // Return new/old outlet matching hash key
      function hash(outlet) {
        // Match by name, direction and type.
        return [outlet.name, outlet.inout, outlet.type].join('-');
      };

      // Build hash of new outlets
      var keys = {};
      _.each(outlets, function (outlet) {
        keys[hash(outlet)] = true;
      }.bind(this));

      // Remove missing outlets
      _.each(this._outlets, function (outlet) {
        if (!keys[hash(outlet)]) this.remove(outlet);
      }.bind(this));

      // Insert new outlets.
      _.each(outlets, function (outlet) {
        // Find match by type/name/direction
        var existing = this.get(outlet.name, outlet.inout);
        if (!existing) {
          // Spawn new outlet
          outlet = new $.Outlet(outlet);
          this.add(outlet);
        }
        else {
          // Update existing outlets in place to retain connections.
          existing.morph(outlet);
        }
      }.bind(this));

      // Chain
      return this;
    }
    return this._outlets;
  },

  // Add outlet object to node.
  add: function (outlet) {
    var key = this.key(outlet);
        outlets = this._outlets,
        _in = this.inputs,
        _out = this.outputs;

    // Sanity checks.
    if (outlet.node) throw "Adding outlet to two nodes at once.";
    if (outlets[key]) throw "Adding two identical outlets to same node.";

    // Link back outlet.
    outlet.link(this);

    // Add to name list and inout list.
    outlets[key] = outlet;
    (outlet.inout == $.IN ? _in : _out).push(outlet);

    // Chain
    return this;
  },

  // Remove outlet object from node.
  remove: function (outlet) {
    var outlets = this._outlets,
        key = this.key(outlet),
        inout = outlet.inout,
        set = outlet.inout == $.IN ? this.inputs : this.outputs;

    // Sanity checks
    if (outlet.node != this) throw "Removing outlet from wrong node.";

    // Disconnect outlet.
    outlet.disconnect();

    // Unlink outlet.
    outlet.link(null);

    // Remove from name list and inout list.
    delete outlets[key];
    set.splice(set.indexOf(outlet), 1);

    // Chain
    return this;
  },

  // Connect to the target node by matching up inputs and outputs.
  connect: function (node, empty, force) {
    var outlets = {},
        hints = {},
        counters;

    // Keep track of how often a particular type has been encountered.
    function track(match) {
      return counters[match] = (counters[match] || 0) + 1;
    }
    function reset() {
      counters = {};
    }

    // Build hash keys of target outlets.
    reset();
    _.each(node.inputs, function (outlet) {
      // Only autoconnect if not already connected.
      if (!force && outlet.input) {
        return;
      }

      // Match outlets by type/name hint, then type/position key.
      var type = outlet.type,
          hint = [type, outlet.hint].join('-');

      if (!hints[hint]) hints[hint] = outlet;
      outlets[type] = outlets[type] || [];
      outlets[type].push(outlet);
    });

    // Build hash keys of source outlets.
    reset();
    _.each(this.outputs, function (outlet) {
      // Ignore this outlet if only matching empties.
      if (empty && outlet.output.length) return;

      // Match outlets by type and name.
      var type = outlet.type,
          hint = [type, outlet.hint].join('-');

      // Connect if found.
      if (hints[hint]) {
        hints[hint].connect(outlet);

        delete hints[hint];
        outlets[type].splice(outlets[type].indexOf(outlet), 1);
        return;
      }

      // Match outlets by type and order.
      // Link up corresponding outlets.
      if (outlets[type] && outlets[type].length) {
        outlets[type].shift().connect(outlet);
      }
    });

    // Chain
    return this;
  },

  // Disconnect entire node
  disconnect: function (node) {
    _.each(this.inputs, function (outlet) {
      outlet.disconnect();
    });

    _.each(this.outputs, function (outlet) {
      outlet.disconnect();
    });

    // Chain
    return this;
  }//,

};

})(ShaderGraph);
(function ($) {
$.Outlets = 0;

$.Outlet = function (inout, name, hint, type, category, exposed, meta) {

  // Object constructor syntax
  if (typeof inout == 'object') {
    var object = inout;
    return new $.Outlet(object.inout, object.name, object.hint, object.type, object.category, object.exposed);
  }

  this.node     = null;
  this.inout    = inout;
  this.name     = name;
  this.hint     = hint || name;
  this.type     = type;
  this.category = category;
  this.exposed  = !!exposed;
  this.meta     = meta || {};
  this.index    = ++$.Outlets;
  this.key      = null;

  this.input = null;
  this.output = [];
};

$.Outlet.prototype = {
  // Unique ID for this outlet.
  id: function () {
    return ['', 'sg', this.name, this.index].join('_');
  },

  // Set exposed flag
  expose: function (exposed) {
    this.exposed = exposed;
  },

  // Change into given outlet without touching connections.
  morph: function (outlet) {
    this.inout    = outlet.inout;
    this.name     = outlet.name;
    this.type     = outlet.type;
    this.category = outlet.category;
    this.exposed  = outlet.exposed;
    this.meta     = outlet.meta || {};
  },

  // Connect to given outlet.
  connect: function (outlet) {
    // Connect input from the other side.
    if (this.inout == $.IN && outlet.inout == $.OUT) {
      return outlet.connect(this);
    }

    // Disallow bad combinations.
    if (this.inout != $.OUT || outlet.inout != $.IN) {
      console.log(this, outlet)
      throw "Can't connect out/out or in/in outlets.";
    }

    // Check for existing connection.
    if (outlet.input == this) return;

    // Disconnect existing connections.
    outlet.disconnect();

    // Add new connection.
    outlet.input = this;
    this.output.push(outlet);
  },

  // Disconnect given outlet (or all).
  disconnect: function (outlet) {
    if (this.inout == $.IN) {
      // Disconnect input from the other side.
      if (this.input) {
        this.input.disconnect(this);
      }
    }
    else {
      if (outlet) {
        // Remove one outgoing connection.
        var index = this.output.indexOf(outlet);
        if (index >= 0) {
          this.output.splice(index, 1);
          outlet.input = null
        }
      }
      else {
        // Remove all outgoing connections.
        _.each(this.output, function (outlet) {
          outlet.input = null
        });
        this.output = [];
      }
    }
  },

  // Link to given node.
  link: function (node) {
    this.node = node;
  }//,
};

})(ShaderGraph);/**
 * MathBox.js. Math plotting tool for three.js / webgl.
 */

// Math!
var π = Math.PI,
    τ = π * 2;

// Check dependencies.
(function (deps) {
  for (var i in deps) {
    if (!window[i]) throw "Error: MathBox requires " + deps[i];
  }
})({
  'THREE': 'Three.js',
  'tQuery': 'tQuery.js (bundle)',
  'ThreeBox': 'ThreeBox.js',
  'ThreeRTT': 'ThreeRTT.js'//,
});

// Namespace.
window.MathBox = {};

// Shortcut static call.
window.mathBox = function (element, options) {
  // Omit element (use body)
  if (element && !(element instanceof Node)) {
    options = element;
    element = null;
  }

  return tQuery.createWorld(options).mathBox(element, options);
};

// Fetch shader from <script> tag by id
MathBox.getShader = function (id) {
  var elem = document.getElementById(id);
  return elem && (elem.innerText || elem.textContent) || id;
};

Math.sign = function (x) {
  return x > 0 ? 1 : x < 0 ? -1 : 0;
};
MathBox.Attributes = function () {
};

MathBox.Attributes.prototype = {

  get: function (key) {
    if (key === undefined) return this.__attributes || {};
    if (!this.__attributes) return undefined;
    return this.__attributes[key];
  },

  set: function (object, value) {
    if (!this.__attributes) this.__attributes = {};
    if (!this.__validators) this.__validators = {};

    var changed = {},
        validators = this.__validators,
        attributes = this.__attributes,
        that = this;

    var validate = function (key, value) {
      if (validators[key] === undefined) {
        var method = 'validate' + key.charAt(0).toUpperCase() + key.slice(1);
        validators[key] = that[method] || false;
      }
      if (validators[key]) return validators[key].call(this, value);
      return value;
    }.bind(this);

    function set(key, value) {
      try {
        value = validate(key, value);
        changed[key] = value;
        attributes[key] = value;
      }
      catch (e) { throw "Exception setting '" + key + "' to '" + value + "': " + e; }
    }

    if (object === undefined || object === null) {
      return;
    }
    else if (object.constructor == String) {
      set(object, value);
    }
    else {
      _.each(object, function (value, key) {
        set(key, value);
      });
    }

    this.emit('change', changed);
  }//,

};

// Microeventable
MicroEvent.mixin(MathBox.Attributes);

MathBox.Attributes.mixin = function (klass) {
  _.each(['get', 'set', 'on', 'emit'], function (key) {
    klass.prototype[key] = MathBox.Attributes.prototype[key];
  })
};
/**
 * Attribute animator. Works on any object with the Attributes.js mixin.
 *
 * Requires manual synchronization by calling animator.update().
 */
MathBox.Animator = function () {
  this.active = [];
};

MathBox.Animator.now = 1;

MathBox.Animator.prototype = {

  /**
   * Return the final state of an object after all currently queued animations have run their course.
   */
  finalState: function (object) {
    var state = _.extend({}, object.get());
    if (object.__queue) {
      _.each(object.__queue, function (queue, key) {
        _.each(queue, function (op) {
          if (op.to) {
            state[key] = op.to;
          }
        });
      });
    }
    return state;
  },

  /**
   * Attach animator to an object.
   */
  attach: function (object) {
    if (object.__queue) return;
    if (!object.__attributes) throw "Cannot attach to object without attributes";

    var animator = this;

    // Override set method to abort running animations.
    var set = object.set;
    object.set = function (object, value, ignore) {

      if (!ignore) {
        var stop = object;

        // Argument parsing
        if (object === undefined || object === null) {
          return;
        }
        else if (object.constructor == String) {
          stop = {};
          stop[object] = value;
        }

        // Stop all animations on the given keys
        animator.stop(this, stop);
      }

      // Pass through to Attributes
      set.call(this, object, value);
    };

    // Prepare animation queue
    var queue = {};
    object.__queue = queue;
    object.__animations = 0;
  },

  /**
   * Hurry all animations on an object by speeding by a factor.
   */
  hurry: function (object, keys, factor) {
    factor = factor || 4;

    // Reduce
    _.each(keys || object.__queue, function (queue, key) {
      _.each(object.__queue[key], function (op) {
        op.hurry(factor);
      });
    }.bind(this));
  },

  /**
   * Stop all animations on an object.
   */
  stop: function (object, keys) {
    // Dequeue all animations, applying instantly.
    _.each(keys || object.__queue, function (queue, key) {
      while (object.__queue[key]) {
        this.dequeue(object, key, true);
      }
    }.bind(this));
  },

  /**
   * Animate a set of attributes on an object.
   */
  animate: function (object, attributes, options) {
    var defaults = {
      duration: 300//,
    };
    options = _.extend(defaults, options || {});

    this.attach(object);

    _.each(attributes, function (value, key) {
      // Init queue if necessary.
      var queue = object.__queue[key] = object.__queue[key] || [];

      // Queue delay
      if (options.delay) {
        var delay = new MathBox.Animator.Delay(object, key, options.delay);
        queue.push(delay);

        if (object.__animations++ == 0) {
          this.active.push(object);
        }
      }

      // Validate target value
      if (object.__validators[key]) {
        value = object.__validators[key].call(object, value);
      }

      // Queue new animation
      var animation = new MathBox.Animator.Animation(
                        object, key, value, options.duration, options.callback, options.ease);
      queue.push(animation);

      // Keep track of animating objects
      if (object.__animations++ == 0) {
        this.active.push(object);
      }
    }.bind(this));
  },

  /**
   * Remove current animation on an object attribute.
   */
  dequeue: function (object, key, apply) {

    // Check if key is animated
    var queue = object.__queue[key];
    if (!queue) return;

    // Remove from front of queue.
    var animation = queue.shift();
    if (queue.length == 0) delete object.__queue[key];

    // Apply animation instantly
    if (apply) {
      animation.skip();
    }

    // Keep track of animating objects
    if (--object.__animations == 0) {
      this.active.splice(this.active.indexOf(object), 1);
    }
  },

  /**
   * Update all currently running animations.
   */
  update: function (speed) {
    MathBox.Animator.now += speed; // Use synchronized clock

    var active = this.active.slice();
    _.each(active, function (object) {
      // Used to make queued animations match up at sub-frame times.
      var offset = 0;
      _.each(object.__queue, function update(queue, key) {
        // Write out animated attribute.
        var animation = queue[0];
        value = animation.apply(offset || 0);

        // Remove completed animations.
        if (animation.done()) {
          offset = animation.extra();
          this.dequeue(object, key);

          // Recurse into next animation.
          if (queue[0]) {
            update.call(this, queue, key);
          }
        }
      }.bind(this));
    }.bind(this));
  }//,
}

/**
 * Non-animation that just adds a delay.
 */
MathBox.Animator.Delay = function (object, key, duration) {
  this.object = object;
  this.key = key;
  this.duration = duration;
  this.start = 0;
  this.fraction = 0;
}

MathBox.Animator.Delay.prototype = {

  init: function (offset) {
    this.start = MathBox.Animator.now - (offset || 0);
  },

  apply: function (offset) {
    if (!this.start) this.init(offset);
    if (this.duration > 0) {
      this.fraction = Math.min(1, (MathBox.Animator.now - this.start) / this.duration);
    }
    else {
      this.fraction = 1;
    }
  },

  skip: function () {
    this.duration = 0;
  },

  hurry: function (factor) {
    this.duration -= (1 - this.fraction) * this.duration * (factor - 1);
  },

  extra: function () {
    return MathBox.Animator.now - this.start - this.duration;
  },

  done: function () {
    return this.fraction == 1;
  }//,
}

/**
 * Animation on a single attribute.
 */
MathBox.Animator.Animation = function (object, key, value, duration, callback, ease) {
  this.object = object;
  this.key = key;
  this.from = null;
  this.to = value;
  this.duration = duration;
  this.start = 0;
  this.fraction = 0;
  this.callback = callback;
  this.ease = ease;
};

MathBox.Animator.Animation.prototype = {

  init: function (offset) {
    this.start = MathBox.Animator.now - (offset || 0);
    if (this.from === null) this.from = this.object.get(this.key);
    if (this.from === undefined) {
      this.from = 0;
    }
  },

  apply: function (offset) {
    if (!this.start) this.init(offset);

    var object = this.object;
    var from = this.from;
    var to = this.to;
    var key = this.key;
    var ease = this.ease;

    // Calculate animation progress / fraction.
    var fraction;
    if (this.duration > 0) {
      fraction = Math.min(1, (MathBox.Animator.now - this.start) / (this.duration || 1));
    }
    else {
      fraction = 1;
    }
    this.fraction = fraction;

    // Simple easing support.
    var rolloff;
    switch (ease) {
      case 'in':
        rolloff = 1 - (1 - fraction) * (1 - fraction);
        break;
      case 'out':
        rolloff = fraction * fraction;
        break;
      case 'linear':
        rolloff = fraction;
        break;
      default:
        rolloff = .5-.5*Math.cos(fraction * π);
        break;
    }

    // Linear interpolation
    function lerp(from, to) {
      return from + (to - from) * rolloff;
    }

    // Interpolate between two arbitrary values/objects.
    function process(from, to) {

      // Handle default cases.
      if (to === undefined) {
        to = from;
      }
      if (from === undefined) {
        from = to;
      }
      if (to === from) {
        return from;
      }

      // Sanity type check.
      if (typeof from != typeof to) {
        console.log(object, key)
        throw "Data type mismatch between from/to values in animator. "+ key +': '+ from + ' ('+ from.constructor +')' + ", " + to + "("+ to.constructor +")";
      }

      // Type-specific behavior.
      var out;
      switch (typeof to) {
        default:
        case 'string':
          throw "Unimplemented value type in animator. ("+(typeof to)+")";

        case 'function':
          return function () {
            return process(from.apply(this, arguments), to.apply(this, arguments));
          };

        case 'boolean':
          return (fraction > .5) ? to : from;

        case 'number':
          return lerp(from, to);

        case 'object':
          if (!from) {
            return to;
          }
          if (!to) {
            return from;
          }
          if (to.constructor == Array) {
            out = [];
            _.loop(from.length, function (i) {
              out[i] = process(from[i], to[i]);
            })
            return out;
          }
          if (to.constructor == THREE.Matrix4) {
            out = new THREE.Matrix4()
            for (var i = 0; i < 16; ++i) {
              out.elements[i] = lerp(from.elements[i], to.elements[i]);
            }
            return out;
          }
          if (to.constructor == THREE.Vector3) {
            out = new THREE.Vector3()
            out.x = lerp(from.x, to.x);
            out.y = lerp(from.y, to.y);
            out.z = lerp(from.z, to.z);
            return out;
          }
          if (to.constructor == THREE.Color) {
            out = new THREE.Color()
            out.r = lerp(from.r, to.r);
            out.g = lerp(from.g, to.g);
            out.b = lerp(from.b, to.b);
            return out;
          }
          return (fraction > .5) ? to : from;
          //throw "Unimplemented value type in animator. "+(typeof to)+" ("+ to.constructor +")";
      }
    }

    var value = process(from, to);
    this.object.set(this.key, value, true);
  },

  hurry: function (factor) {
    this.duration -= (1 - this.fraction) * this.duration * (factor - 1);
  },

  skip: function () {
    this.duration = 0;
    this.fraction = 1;
    this.done();
  },

  extra: function () {
    return MathBox.Animator.now - this.start - this.duration;
  },

  done: function () {
    if (this.fraction == 1) {
      // Set final value.
      this.object.set(this.key, this.to, true);

      this.callback && this.callback();
      this.callback = null;
      return true;
    }
    return false;
  }//,
};

/**
 * Mathbox stage.
 *
 * Has a mathematical viewport, contains mathematical primitives, can be added to a three.js scene.
 */
MathBox.Stage = function (options, world, overlay) {
  this.options = options = options || {};

  this._world = world;

  // Prepare overlay
  this.overlay = overlay;
  world && world.on('resize', function (width, height) {
    this.overlay.size(width, height);
    this.width = width;
    this.height = height;
  }.bind(this));

  // Create array to hold primitives
  this.primitives = [];

  // Create material manager.
  this.materials = new MathBox.Materials(this);

  // Create attribute animator
  this.animator = new MathBox.Animator();
  this._transition = 0;
  this._speed = 1;

  // Create animateable camera controls.
  if (world) {
    this.cameraProxy = new MathBox.CameraProxy(world, this.options);
  }

  // Create viewport
  this.viewport({});

  // Create methods for available primitives.
  this.loadPrimitives();

  // Set options
  if (options.transition !== undefined) {
    this.transition(options.transition);
  }
  if (options.speed !== undefined) {
    this.speed(options.speed);
  }
};

// Inherit from Object3D to trick tQuery.
MathBox.Stage.prototype = new THREE.Object3D();

// Add attributes
MathBox.Attributes.mixin(MathBox.Stage);

// Make eventable
MicroEvent.mixin(MathBox.Stage);

MathBox.Stage.prototype = _.extend(MathBox.Stage.prototype, {

  /**
   * Rendering loop
   */

  // Update before render.
  update: function () {
    var viewport = this._viewport,
        camera = this._world.tCamera(),
        width = this.width,
        height = this.height,
        speed = this._speed;

    // Apply running animations.
    var now = +new Date();
    if (!this.last) {
      this.last = now - 1000/60;
    }
    this.animator.update(speed * (now - this.last));
    this.last = now;

    // Update viewport transform.
    viewport.update(this);

    // Loop over all primitives.
    _.each(this.primitives, function (primitive) {
      // Adjust to viewport
      primitive.adjust(viewport, camera, width, height, this);

      // Loop over renderables
      var renderables = primitive.renderables();
      _.each(renderables, function (renderable) {
        // Adjust visible renderables to viewport
        renderable.isVisible() && renderable.adjust(viewport, camera, width, height, this);
      }.bind(this));
    }.bind(this));

    // Update sprite overlay
    this.overlay && this.overlay.update(camera);
  },

  /**
   * Primitive insertion/removal
   */

  add: function (object, animate) {
    // Overload Object3D.add

    if (object instanceof THREE.Object3D) {
      if (object instanceof MathBox.Sprite) {
        // Add to 2D overlay
        return this.overlay.add(object);
      }
      else {
        // Add to three.js scene tree
        return THREE.Object3D.prototype.add.call(this, object);
      }
    }
    else {
      // Add to mathbox.
      this._add(object);

      // Apply insertion animation
      animate = this.animateOptions(animate);
      var opacity = object.style.get('opacity');
      if (animate && opacity > 0) {
        object.style.set('opacity', 0);

        this.animator.animate(
          object.style,
          { opacity: opacity },
          animate);
      }

      return this;
    }
  },

  remove: function (object, animate) {
    // Overload Object3D.remove

    if (object instanceof THREE.Object3D) {
      if (object instanceof MathBox.Sprite) {
        // Remove from 2D overlay
        return this.overlay.remove(object);
      }
      else {
        // Remove from three.js scene tree
        return THREE.Object3D.prototype.remove.call(this, object);
      }
    }
    else {

      // Allow for removal via selector
      if (typeof object == 'string') {
        return _.each(this.select(object), function (object) {
          this.remove(object, animate);
        }.bind(this));
      }

      // Don't remove singletons.
      if (object.singleton) return;

      // Remove from mathbox (callback).
      var remove = function () {
        this._remove(object);
      }.bind(this);

      // Apply removal animation
      animate = this.animateOptions(animate);
      var opacity = object.style.get('opacity');

      if (animate && opacity > 0) {
        // Schedule removal
        animate.callback = remove;
        this.animator.animate(
          object.style,
          { opacity: 0 },
          animate);

        // Mark as removed
        object.removed = true;
      }
      else {
        // Remove immediately
        remove();
      }

      return this;
    }
  },

  /**
   * Add primitive to stage, instantiate its renderables.
   */
  _add: function (primitive) {
    var materials = this.materials;

    if (this.primitives.indexOf(primitive) != -1) return;
    this.primitives.push(primitive);

    primitive.make();

    var renderables = primitive.renderables();

    _.each(renderables, function (renderable) {
      renderable.make(materials);
      renderable.object && this.add(renderable.object);
    }.bind(this));
  },

  /**
   * Remove primitive from stage, remove its renderables.
   */
  _remove: function (primitive) {
    if (this.primitives.indexOf(primitive) == -1) return;

    this.primitives.splice(this.primitives.indexOf(primitive), 1);

    var renderables = primitive.renderables();
    _.each(renderables, function (renderable) {
      renderable.object && this.remove(renderable.object);
      renderable.destroy();
    }.bind(this));

    primitive.destroy();

  },

  ///// Primitive manipulation //////////////

  /**
   * Select primitives by type or ID.
   */
  select: function (selector, includeDead) {
    var out = [];

    // Allow literal object / array of objects
    if (typeof selector == 'object') {
      if (selector.constructor == Array) return selector;
      return [selector];
    }

    // Parse single selector
    var select = function (selector) {
      var out = [];

      // Universal selector
      if (selector == '*') {
        out = this.primitives.slice();
        out.push(this.viewport());
        out.push(this.cameraProxy);
        return out;
      }

      // See if selector is numeric
      if (selector == +selector) {
        // match by sequence number
        _.each(this.primitives, function (primitive) {
          if ((includeDead || !primitive.removed) && primitive.get('sequence') == selector) {
            out.push(primitive);
          }
        });
        return out;
      }

      // Parse css-like selector: #id, type
      var match = selector.match(/^\s*#([a-zA-Z0-9_-]+)|([a-zA-Z0-9_-]+)?\s*$/);
      if (!match) return [];

      var type = match[2],
          id = match[1];

      if (id) {
        // match by ID
        _.each(this.primitives, function (primitive) {
          if ((includeDead || !primitive.removed) && primitive.get('id') == id) {
            out.push(primitive);
          }
        });
      }
      else {

        // Special singletons
        if (type == 'camera') {
          return this.cameraProxy && [this.cameraProxy] || [];
        }

        if (type == 'viewport') {
          return [this.viewport()];
        }

        // Declared primitive types
        if (type) {
          _.each(this.primitives, function (primitive) {
            if ((includeDead || !primitive.removed) && primitive.type() == type) {
              out.push(primitive);
            }
          });
        }
      }

      return out;
    }.bind(this);

    // Split joined selector into individual selectors and apply
    var out = [];
    selector = (''+selector).split(',');
    _.each(selector, function (selector) {
      out = out.concat(select(selector));
    });
    return out;
  },

  /**
   * Set properties on primitives.
   */
  set: function (selector, options) {
    options = this.extractStyle(options);
    _.each(this.select(selector), function (primitive) {
      primitive.set(options);
      if (options.style) {
        primitive.style.set(options.style);
      }
    });

    return this;
  },

  /**
   * Get (finalized) properties of a primitive.
   */
  get: function (selector) {
    var animator = this.animator;

    selector = this.select(selector);
    if (selector.length < 1) return {};
    var object = selector[0];

    var out = animator.finalState(object);
    if (object.style) {
      var style = animator.finalState(object.style);
      out.style = style;
    }

    return out;
  },

  ////////// Primitive animation ////////////////////////

  /**
   * Set default transition duration
   */
  transition: function (transition) {
    if (transition !== undefined) {
      this._transition = transition;
      return this;
    }
    return this._transition;
  },

  /**
   * Set speed multiplier
   */
  speed: function (speed) {
    if (speed !== undefined) {
      this._speed = speed;
      return this;
    }
    return this._speed;
  },

  /**
   * Resolve animation options
   */
  animateOptions: function (animate, force) {
    var auto = this._transition,
        speed = this._speed;

    if (animate === true) animate = {};
    if (auto || force || (animate && (animate.delay || animate.duration))) {
      animate = _.extend({ delay: 0, duration: auto || 0 }, animate || {});
    }
    if (animate && (animate.delay || animate.duration)) {
      return animate;
    }
  },

  /**
   * Animate primitives to give state.
   */
  animate: function (selector, options, animate) {
    var animator = this.animator;

    options = this.extractStyle(options);
    animate = this.animateOptions(animate, true);

    if (options.style) {
      _.each(this.select(selector), function (primitive) {
        animator.animate(primitive.style, options.style, animate);
      });
      options = _.extend({}, options);
      delete options.style;
    }

    _.each(this.select(selector), function (primitive) {
      animator.animate(primitive, options, animate);
    });

    return this;
  },

  /**
   * Clone primitives and animate to new properties.
   */
  clone: function (selector, options, animate) {
    _.each(this.select(selector), function (primitive) {
      var original = this.get(primitive);

      // Reset creation ID of clone
      delete original.sequence;

      // Sort options into animatable and non-animatable
      var newOptions = _.extend({}, options);
      var remove = [];
      _.each(options, function (value, key) {
        if (key == 'id' || typeof value == 'boolean' || value === null) {
          original[key] = options[key];
          remove.push(key);
        }
      });
      _.each(remove, function (key) { delete newOptions[key] });

      // Force ID change
      if (original.id == primitive.get('id')) {
        original.id = (original.id || '') + '-clone';
      }

      // Spawn clone and animate it to new properties
      var copy = this.spawn(primitive.type(), original, { duration: 0 });
      this.animate(copy, newOptions, animate);
    }.bind(this));

    return this;
  },

  /**
   * Hurry primitives currently being animated.
   */
  hurry: function (selector, keys, limit) {
    var animator = this.animator;

    _.each(this.select(selector, true), function (primitive) {
      animator.hurry(primitive, keys, limit);
      primitive.style && animator.hurry(primitive.style, keys, limit);
    });

    return this;
  },

  /**
   * Stop animations on primitives
   */
  halt: function (selector, keys) {
    var animator = this.animator;

    _.each(this.select(selector, true), function (primitive) {
      animator.stop(primitive, keys);
      primitive.style && animator.stop(primitive.style, keys);
    });

    return this;
  },

  /**
   * Change properties of viewport
   */
  viewport: function (viewport) {
    if (viewport !== undefined) {
      // If changing viewport type, renderables need to be re-instantiated
      // to regenerate shaders.
      if (!this._viewport || (viewport.type && viewport.type != this.options.viewport.type)) {
        // Weave in existing properties
        if (this._viewport) {
          viewport = _.extend({}, this._viewport.get(), viewport);
        }

        // Make viewport
        this._viewport = MathBox.Viewport.make(viewport);

        // Reinstantiate all primitives to renegerate shaders.
        var primitives = this.primitives.slice(),
            stage = this;
        _.each(primitives, function (primitive) {
          stage._remove(primitive);
          stage._add(primitive);
        });
      }
      else {
        // Set properties directly
        this._viewport.set(viewport);
      }
      this.options.viewport = this._viewport.get();
      return this;
    }

    return this._viewport;
  },

  // Set camera properties
  camera: function (options) {
    _.each(this.select('camera'), function (camera) {
      camera.set(options);
    });

    return this;
  },

  // tQuery passthrough
  start: function () {
    this._world && this._world.start();
    return this;
  },

  stop: function () {
    this._world && this._world.stop();
    return this;
  },

  world: function () {
    return this._world;
  },

  //////////// Primitive constructors ////////////////

  /**
   * Extract style properties from flattened options and put into style subkey for convenience.
   */
  extractStyle: function (options) {
    var styles = MathBox.Style.prototype.defaults();
    var out = null;
    _.each(options, function (value, key) {
      if (styles[key] !== undefined) {
        delete options[key];
        out = out || {};
        out[key] = value;
      }
    });
    if (out) {
      options.style = _.extend(options.style || {}, out);
    }
    return options;
  },

  /**
   * Spawn primitive by type
   */
  spawn: function (selector, options, animate) {
    if (MathBox.Primitive.types[selector]) {
      this[selector](options, animate);
      return this.primitives[this.primitives.length - 1];
    }

    return this;
  },

  /**
   * Load all declared primitives and make spawning methods for them
   */
  loadPrimitives: function () {
    _.each(MathBox.Primitive.types, function (klass, type) {
      this[type] = function (options, animate) {
        if (klass.validateArgs) {
          options = klass.validateArgs(options);
        }

        var object = new klass(this.extractStyle(options));
        this.add(object, animate);

        return this;
      }
    }.bind(this));
  },
});

/**
 * Material manager. Generates custom ShaderMaterials that perform
 * all the right transforms and stylings.
 *
 * Uses ShaderGraph to glue together basic snippets, which can be
 * overridden on a section by section basis.
 */
MathBox.Materials = function (stage) {
  this.stage = stage;
  this.cache = {};
}

MathBox.Materials.prototype = {

  /**
   * Get material hash
   */
  hash: function (options) {
    // Calculate material hash
    var keys = Object.keys(options);
    var hash = '';
    keys.sort();
    _.each(keys, function (key) {
      hash += key + '/';
      hash += options[key] + '/';
    });

    return hash;
  },

  /**
   * Clone cached material
   */
  clone: function (material) {
    var clone = new THREE.ShaderMaterial({
      vertexShader: material.vertexShader,
      fragmentShader: material.fragmentShader,
    });
    clone.attributes      = material.attributes ? {} : null;
    clone.uniforms        = {};
    clone.wireframe       = material.wireframe;
    clone.applyUniforms   = material.applyUniforms;
    clone.applyAttributes = material.applyAttributes;

    _.each(material.uniforms, function (uniform, key) {
      clone.uniforms[key] = {
        type: uniform.type,
        value: (uniform.value && uniform.value.clone) ? uniform.value.clone() : uniform.value,
      };
    });
    _.each(material.attributes, function (attributes, key) {
      clone.attributes[key] = {
        type: attributes.type,
        value: attributes.value,
      };
    });

    return clone;
  },

  /**
   * Return a generic material.
   */
  generic: function (options) {
    options = options || {};

    // Check for cached instance if not using custom shader
    if (!options.shaders || !Object.keys(options.shaders).length) {
      var hash = this.hash(options);
      if (this.cache[hash]) {
        return this.clone(this.cache[hash]);
      }
    }

    // Prepare new shadergraph factory.
    var factory = this.factory();
    var shaders = options.shaders || {};

    // Read out vertex position.
    if (shaders.position) {
      shaders.position(factory, this);
    }
    else {
      this.position(factory, options);

      // Apply viewport transform
      if (!options.absolute) {
        if (options.shaded && options.smooth) {
          // Viewport transform for position + DU/DV
          factory.group();
          this.viewport(factory);
          factory.next();
          this.viewport(factory);
          factory.next();
          this.viewport(factory);
          factory.combine();
        }
        else {
          // Viewport transform for position
          this.viewport(factory);
        }
      }
    }

    // Apply finalizing shaders.
    var material = this.finalize(factory, options);

    if (hash) {
      // Cache material
      this.cache[hash] = material;
    }
    return material;
  },

  /**
   * Insert the position snippet into a shadergraph factory.
   */
  position: function (factory, options) {
    options = options || {};

    // Default position snippet
    var position = (options.shaded && options.smooth) ? 'getPositionDUDV' : 'getPosition';

    // Fetch vertex position from three.js attributes
    factory
      .snippet(position);

    // Apply math transform
    if (!options.absolute) {
      if (options.shaded && options.smooth) {
        // Transform position + DU/DV offset positions
        factory
          .group()
            .snippet('mathTransform')
          .next()
            .snippet('mathTransform')
          .next()
            .snippet('mathTransform')
          .combine();
      }
      else {
        // Transform just position
        factory.snippet('mathTransform');
      }
    }

    return factory;
  },

  /**
   * New factory
   */
  factory: function () {
    return new ShaderGraph.Factory();
  },

  /**
   * Finalize a shadergraph by adding on final transforms and a material shader.
   */
  finalize: function (factory, options) {
    // Read out shaders
    options = options || {};
    var shaders = options.shaders || {};

    // Transform point to view.
    if (options.shaded) {
      if (options.smooth) {
        factory
          .snippet('projectToViewDUDV')
      }
      else {
        factory
          .snippet('projectToViewNormal')
      }
    }
    else {
      factory
        .snippet('projectToView')
    }

    if (shaders.material) {
      // Override material shader
      shaders.material(factory, this);
    }
    else {
      // Add default fragment shader
      var fragment = {
        points: 'fragmentSolidPoint',
        mesh: options.shaded
              ? 'fragmentShaded'
              : 'fragmentSolid',
      }[options.type] || 'fragmentSolid';

      factory.material('vertexOutput', fragment);
    }

    // Finish graph and compile program
    var graph = factory.end(),
        program = graph.compile();

    // Create Three.js material
    var material = new THREE.ShaderMaterial({
      uniforms: program.uniforms,
      attributes: program.attributes,
      vertexShader: program.vertexShader,
      fragmentShader: program.fragmentShader,
    });

    // Set necessary three.js flags
    if (options.wireframe) {
      material.wireframe = true;
    }

    // Add .apply methods to update uniforms/attribs.
    var apply = this.apply.bind(this);
    material.applyUniforms = function (options) {
      apply(this, options, 'uniforms');
    };
    material.applyAttributes = function (options) {
      apply(this, options, 'attributes');
    };

    return material;
  },

  /**
   * Apply uniforms/attributes to a material
   */
  apply: function (material, options, type) {

    var fields = material[type];
    _.each(options, function (value, key) {
      var field = fields[key];
      if (field) {
        if (value instanceof THREE.Color) {
          value.x = value.r;
          value.y = value.g;
          value.z = value.b;
        }
        field.value = value;
        field.needsUpdate = true;
      }
    });

    if (type == 'uniforms') {
      var uniforms = material.uniforms;
      if (options.map) {
        if (uniforms.texture) {
          uniforms.texture.value = options.map;
        }
        if (uniforms.offsetRepeat) {
          var offset = options.map.offset;
          var repeat = options.map.repeat;

          uniforms.offsetRepeat.value.set(offset.x, offset.y, repeat.x, repeat.y);
        }
      }
      if (options.lineWidth !== undefined) {
        material.wireframeLinewidth = material.linewidth = options.lineWidth;
      }
      if (options.opacity !== undefined) {
        material.transparent = options.opacity < 1;
      }
    }

  },

  /**
   * Add viewport transform to a shadergraph factory.
   */
  viewport: function (factory, absolute) {
    this.stage.viewport().shader(factory, absolute);
  },
};
/**
 * Helper to place equally spaced ticks in a range at sensible positions.
 *
 * @param min/max - Minimum and maximum of range
 * @param n - Desired number of ticks in range
 * @param unit - Base unit of scale (e.g. 1 or π).
 * @param scale - Division scale (e.g. 2 = binary division, or 10 = decimal division).
 * @param inclusive - Whether to add ticks at the edges
 * @param bias - Integer to bias divisions one or more levels up or down (to create nested scales)
 */
MathBox.Ticks = function (min, max, n, unit, scale, inclusive, bias) {
  // Desired
  n = n || 10;
  bias = bias || 0;

  // Calculate naive tick size.
  var span = max - min;
  var ideal = span / n;

  // Round to the floor'd power of 'scale'
  unit = unit || 1;
  scale = scale || 10;
  var ref = unit * (bias + Math.pow(scale, Math.floor(Math.log(ideal / unit) / Math.log(scale))));

  // Make derived steps at sensible factors.
  var factors = ((scale % 2) == 0) ? [scale / 2, 1, .5] : [1];
  var steps = _.map(factors, function (factor) { return ref * factor; });

  // Find step size closest to ideal.
  var step = _.reduce(steps, function (ref, step) {
    return Math.abs(step - ideal) < Math.abs(ref - ideal) ? step : ref;
  }, ref);

  // Renormalize min/max onto aligned steps.
  var edge = +!inclusive;
  min = (Math.ceil(min / step) + edge) * step;
  max = (Math.floor(max / step) - edge) * step;
  n = Math.ceil((max - min) / step) + 1;

  var ticks = [];
  _.loop(n, function (x) {
    ticks.push(min + x * step);
  });

  return ticks;
};

MathBox.TicksLog = function (min, max, n, base, inclusive, bias) {
  // TODO: Tick equally in log space
  // Convert fractional part into floor(log)*(1+fraction)
};/**
 * World.mathBox() – Create a mathbox-capable renderer inside a DOM element.
 */
tQuery.World.registerInstance('mathBox', function (element, options) {
  element = element || document.body;

  // Create threebox scene for WebGL
  this.threeBox(element, options);

  // Create overlay for labels / annotations
  var overlay = new MathBox.Overlay();
  element.appendChild(overlay.domElement);
  overlay.domElement.style.position = 'absolute';
  overlay.domElement.style.left = 0;
  overlay.domElement.style.top = 0;
  overlay.domElement.style.right = 0;
  overlay.domElement.style.bottom = 0;

  // Create mathbox stage
  var mathbox = new MathBox.Stage(options, this, overlay);
  var callback = function () {
    mathbox.update();
  };
  this.tScene().add(mathbox);

  // White background
	this._renderer.setClearColorHex( 0xFFFFFF, 1 );

  // Hook into rendering loop
  mathbox.unhook = function () {
    this.loop().unhookPreRender(callback)
  }
  this.loop().hookPreRender(callback);

  if (!options.cameraControls) {
    var camera = this.tCamera();

    camera.position.x = 0;
    camera.position.y = 0;
    camera.position.z = options.orbit;
    camera.lookAt(new THREE.Vector3(0, 0, 0));
  }

  return mathbox;
});

/**
 * Script-based director.
 *
 * Applies operations to mathbox one by one by stepping forward.
 * Can step backwards by automatically applying inverse operations.
 */
MathBox.Director = function (stage, script) {
  this._stage = stage;
  this.script = script || [];
  this.rollback = {};
  this.clocks = {};

  this.step = 0;
  this.lastCommand = 0;

  this.time = 0;
  this.lastTime = +new Date();
};

MathBox.Director.prototype = {

  /**
   * Get clock for slide
   */
  clock: function (step, reset) {
    if (step > this.step) {
      return 0;
    }

    var now = +new Date();
    var delta = now - this.lastTime;
    this.time += delta * this.stage().speed();
    this.lastTime = now;

    if (reset || !this.clocks[step]) this.clocks[step] = this.time;
    return (this.time - this.clocks[step]) * .001;
  },

  /**
   * Invert the given operation (which hasn't been applied yet).
   */
  invert: function (op) {
    var stage = this._stage;

    var inverse = [],
        targets;

    var verb = op[0],
        selector = op[1],
        options = op[2],
        animate = op[3],
        primitive;

    switch (verb) {
      case 'add':
        targets = [0];
        // Fall through
      case 'clone':
        targets = targets || stage.select(selector);
        _.each(targets, function (target, i) {
          inverse.push([
            'remove',
            options.sequence || (MathBox.Primitive.sequence + 1 + i),
          ]);
        })
        break;

      case 'remove':
        targets = stage.select(selector);
        _.each(targets, function (primitive) {
          inverse.push([
            'add',
            primitive.type(),
            stage.get(primitive),
          ]);
        })
        break;

      case 'animate':
      case 'set':
        targets = stage.select(selector);
        _.each(targets, function (primitive) {
          var duration = Math.min(300, (animate && (animate.duration !== undefined)) ? animate.duration : 0);
          inverse.push([
            verb,
            primitive.singleton || primitive.get('sequence'),
            stage.get(primitive),
            { duration: duration },
          ]);
        });
        break;
    }

    return inverse;
  },

  /**
   * Apply the given script step.
   */
  apply: function (step, rollback, instant, skipping) {
    var stage = this._stage;

    _.each(step, function (op) {
      var verb = op[0] || '',
          selector = op[1] || '',
          options = op[2] || {},
          animate = op[3] || {};

      if (verb == 'remove') animate = options;

      if (rollback) {
        var inverse = this.invert(op);
        var args = [0, 0].concat(inverse);
        Array.prototype.splice.apply(rollback, args);
      }

      if (skipping) {
        if (animate) {
          animate = _.extend({}, animate);
          animate.delay = 0;
          animate.duration = animate.duration / 2;
        }
      }
      if (instant) {
        animate = { delay: 0, duration: 0 };
        if (verb == 'animate') {
          verb = 'set';
        }
      }

      switch (verb) {
        case 'clone':
          stage.clone(selector, options, animate);
          break;

        case 'add':
          var primitive = stage.spawn(selector, options, animate);
          break;

        case 'remove':
          _.each(stage.select(selector), function (primitive) {
            stage.remove(primitive, animate);
          });
          break;

        case 'set':
          var targets = stage.select(selector);
          var array = options.constructor == Array;
          _.each(targets, function (target, i) {
            stage.set(target, array ? options[i] : options);
          });
          break;

        case 'animate':
          var targets = stage.select(selector);
          var array = options.constructor == Array;
          _.each(targets, function (target, i) {
            var opts = array ? options[i] : options;
            stage.animate(target, opts, animate);
          });
          break;
      }
    }.bind(this));

    return this;
  },

  /**
   * Insert new script step after current step and execute.
   */
  insert: function (script) {
    // Allow array of ops and single op
    if (script[0].constructor != Array) {
      script = [script];
    }

    // Insert step into the script and execute immediately.
    this.script.splice(this.step, 0, script);

    this.forward();

    return this;
  },

  /**
   * Is at the given step.
   */
  is: function (step) {
    if (!this.script.length) return false;

    while (step < 0) step += this.script.length + 1;
    while (step >= this.script.length + 1) step -= this.script.length + 1;

    return step == this.step
  },

  isFirst: function () {
    return this.is(0);
  },

  isLast: function () {
    return this.is(-1);
  },

  /**
   * Go to the given step in the script.
   */
  go: function (step, instant) {
    if (!this.script.length) return;

    while (step < 0) step += this.script.length + 1;
    while (step >= this.script.length + 1) step -= this.script.length + 1;

    while (step > this.step) { this.forward(instant); }
    while (step < this.step) { this.back(instant); }
  },

  /**
   * Helper to detect rapid skipping, so existing animations can be sped up.
   */
  skipping: function () {
    var t = +new Date(), skip = false;
    if (t - this.lastCommand < 500) {
      skip = true;
    }
    this.stage().hurry('*');
    this.lastCommand = t;
    return skip;
  },

  /**
   * Go one step forward.
   */
  forward: function (instant, delay) {
    if (this.step >= this.script.length) return;

    var step = this.script[this.step];
    var rollback = this.rollback[this.step] = [];
    this.step++;

    var apply = function () {
      this.apply(step, rollback, instant, !instant ? this.skipping() : false);

      this.clock(this.step, true);

      this.emit('go', this.step, 1);
    }.bind(this);

    if (delay) {
      setTimeout(apply, +delay);
    }
    else {
      apply();
    }

    return this;
  },

  /**
   * Go one step backward.
   */
  back: function (instant, delay) {
    if (this.step <= 0) return;

    this.step--;
    var step = this.script[this.step];
    var rollback = this.rollback[this.step];

    var apply = function () {
      this.apply(rollback, null, instant || this.skipping());
      delete this.rollback[this.step];

      this.emit('go', this.step, -1);
    }.bind(this);

    if (delay) {
      setTimeout(apply, +delay);
    }
    else {
      apply();
    }

    return this;
  },

  stage: function () {
    return this._stage;
  },

};

// Proxy methods to stage, retain own chainability.
_.each(MathBox.Stage.prototype, function (f, key) {
  if (!MathBox.Director.prototype[key]) {
    MathBox.Director.prototype[key] = function () {
      var ret = this.stage[f].apply(this.stage, arguments);
      if (ret === this.stage) return this;
      return ret;
    };
  }
});

MicroEvent.mixin(MathBox.Director);

/**
 * Object containing style attributes and their validators.
 */
MathBox.Style = function (options) {
  // Apply defaults
  var defaults = this.defaults();
  options = _.extend(defaults, options || {});
  this.set(options);
};

MathBox.Style.prototype = {

  defaults: function () {
    return {
      color: new THREE.Color(0x3080F0),
      opacity: 1,
      lineWidth: 2,
      pointSize: 5,

      mathScale: new THREE.Vector3(1, 1, 1),
      mathRotation: new THREE.Vector3(),
      mathPosition: new THREE.Vector3(),

      worldScale: new THREE.Vector3(1, 1, 1),
      worldRotation: new THREE.Vector3(),
      worldPosition: new THREE.Vector3(),
      zIndex: 0.0,

      map: null,
      mapColor: 0,
      mapOpacity: 0,
    };
  },

  validateColor: function (c) {
    if (c.constructor == Array) {
      c = c.concat([0, 0, 0]);
      var color = new THREE.Color();
      return color.setRGB.apply(color, c);
    }
    if (c.constructor == Number) {
      return new THREE.Color(c);
    }
    if (c.constructor != THREE.Color) {
      return this.get('color');
    }
    return c;
  },

  validateMathScale: function (v) {
    if (v.constructor == Array) {
      v = v.concat([1, 1, 1]);
      var vector = new THREE.Vector3();
      return vector.set.apply(vector, v);
    }
    if (v.constructor != THREE.Vector3) {
      return this.get('mathScale');
    }
    return v;
  },

  validateMathRotation: function (v) {
    if (v.constructor == Array) {
      v = v.concat([0, 0, 0]);
      var vector = new THREE.Vector3();
      return vector.set.apply(vector, v);
    }
    if (v.constructor != THREE.Vector3) {
      return this.get('mathRotation');
    }
    return v;
  },

  validateMathPosition: function (v) {
    if (v.constructor == Array) {
      v = v.concat([0, 0, 0]);
      var vector = new THREE.Vector3();
      return vector.set.apply(vector, v);
    }
    if (v.constructor != THREE.Vector3) {
      return this.get('mathPosition');
    }
    return v;
  },

  validateWorldScale: function (v) {
    if (v.constructor == Array) {
      v = v.concat([1, 1, 1]);
      var vector = new THREE.Vector3();
      return vector.set.apply(vector, v);
    }
    if (v.constructor != THREE.Vector3) {
      return this.get('worldScale');
    }
    return v;
  },

  validateWorldRotation: function (v) {
    if (v.constructor == Array) {
      v = v.concat([0, 0, 0]);
      var vector = new THREE.Vector3();
      return vector.set.apply(vector, v);
    }
    if (v.constructor != THREE.Vector3) {
      return this.get('worldRotation');
    }
    return v;
  },

  validateWorldPosition: function (v) {
    if (v.constructor == Array) {
      v = v.concat([0, 0, 0]);
      var vector = new THREE.Vector3();
      return vector.set.apply(vector, v);
    }
    if (v.constructor != THREE.Vector3) {
      return this.get('worldPosition');
    }
    return v;
  },

};

MathBox.Attributes.mixin(MathBox.Style);
/**
 * Wrapper around ThreeBox camera to allow attribute animations.
 */
MathBox.CameraProxy = function (world, options) {

  this.set({
    orbit: options.orbit || 3.5,
    phi: options.phi || τ/4,
    theta: options.theta || 0,
    lookAt: options.lookAt || [0, 0, 0],
  });

  this.singleton = 'camera';

  var controls = this.controls = world.getCameraControls()
                     || ThreeBox.OrbitControls.bind(world.tCamera(), null, this.get());

  this.on('change', function (changed) {
    _.each(changed, function (value, key) {
      if (key == 'lookAt') return;
      controls[key] = value;
    });

    if (changed.lookAt) {
      controls.lookAt.set.apply(controls.lookAt, changed.lookAt);
    }
    controls.update();
  });
  controls.update();
}

MathBox.Attributes.mixin(MathBox.CameraProxy);/**
 * MathBox Overlay
 *
 * Positions 2D labels on top of the scene and takes care of overlap.
 */
MathBox.Overlay = function () {
  var element = this.domElement = document.createElement('div');

  element.className = 'mathbox-overlay';

  this.sprites = [];
  this.v = new THREE.Vector3();
  this.q = new THREE.Vector3();
}

MathBox.Overlay.prototype = {

  size: function (width, height) {
    this.width = width;
    this.height = height;

    this.domElement.style.width = width +'px';
    this.domElement.style.height = height +'px';
  },

  add: function (object) {
    if (this.sprites.indexOf(object) != -1) return;
    this.sprites.push(object);

    if (!object.element.parentNode) {
      this.domElement.appendChild(object.element);
    }

    _.each(object.children, function (child) {
      this.add(child);
    }.bind(this))
  },

  remove: function (object) {
    var index;
    if ((index = this.sprites.indexOf(object)) == -1) return;
    this.sprites.splice(index, 1);

    if (object.element.parentNode) {
      object.element.parentNode.removeChild(object.element);
    }

    _.each(object.children, function (child) {
      this.remove(child);
    }.bind(this))
  },

  update: function (camera) {
		this.fov = 0.5 / Math.tan( camera.fov * Math.PI / 360 ) * this.height;

    // Iterate over individual objects for update
    _.each(this.sprites, function (sprite) {
      this._update(sprite, camera);
    }.bind(this));

    // Iterate over individual objects for measurement
    _.each(this.sprites, function (sprite) {
      this._measure(sprite, camera);
    }.bind(this));

    // Iterate over individual objects for measurement
    _.each(this.sprites, function (sprite) {
      this._vis(sprite, camera);
    }.bind(this));
  },

  _measure: function (object, camera) {
    // Measure sprites
    if (object.measure) {
      var element = object.element;
      object.width = element.offsetWidth;
      object.height = element.offsetHeight;
      object.measure = false;
    }
  },

  _vis: function (object, camera) {
    // If already hidden, ignore
    if (!object.render) return;
    if (!object.width && !object.height) return;

    // Check visibility for each sprite relative to other visibles
    var ox1 = object.left,
        oy1 = object.top,
        ox2 = object.width + ox1,
        oy2 = object.height + oy1;

    // Iterate only sprites after this one
    found = false;
    _.each(this.sprites, function (sprite) {
      if (sprite === object) {
        found = true;
        return;
      }
      if (!found) return;
      if (!sprite.render) return;

      var sx1 = sprite.left,
          sy1 = sprite.top,
          sx2 = sprite.width + sx1,
          sy2 = sprite.height + sy1;

      // Check for overlap in X or Y
      if (ox2 < sx1 || ox1 > sx2) return;
      if (oy2 < sy1 || oy1 > sy2) return;

      // Hide
      sprite.element.style.display = 'none';
      sprite.render = false;
    });
  },

  _update: function (object, camera) {
    var v = this.v,
        q = this.q,
        epsilon = 0.01;

    var render = object.render;

    // Check visibility
    var visible = object.visible, parent = object.parent;
    while (visible && parent) {
      visible = visible && parent.visible;
      parent = parent.parent;
    }
    object.render = visible && (object.opacity > 0);

    if (!object.render) {
      if (render || render === null) {
        object.element.style.display = 'none';
      }
      return;
    }
    else if (!render) {
      object.element.style.display = 'block';
    }

    // Transform into camera space
    v.copy(object.position);
    camera.matrixWorldInverse.multiplyVector3(v);

    // Project to 2D and convert to pixels
    var x = -(v.x / v.z) * this.fov + this.width  * .5;
    var y =  (v.y / v.z) * this.fov + this.height * .5;

    // Add spacer
    if (object.distance) {
      // Add tangent and project again
      q.copy(object.tangent).multiplyScalar(epsilon);
      q.addSelf(object.position);
      camera.matrixWorldInverse.multiplyVector3(q);

      // Find difference and scale it
      var sign = object.distance > 0 ? 1 : -1;
      q.subSelf(v);
      q.z = 0;
      q.normalize().multiplyScalar(object.distance);
      x += Math.abs(q.y) * sign;
      y += Math.abs(q.x) * sign;
    }

    // Round to avoid pixel fuzzyness
    x = Math.round(x);
    y = Math.round(y);

    // Set position
    if (object.left !== x) {
      object.left = x;
      object.element.style.left = x + 'px';
    }
    if (object.top !== y) {
      object.top = y;
      object.element.style.top  = y + 'px';
    }

    // Set opacity
    if (object.lastOpacity !== object.opacity) {
      object.element.style.opacity = object.opacity;
      object.lastOpacity = object.opacity;
    }

  },

};

MathBox.Sprite = function (element, tangent, distance) {
  this.element = element;
  this.tangent = tangent || new THREE.Vector3(1, 0, 0);
  this.distance = distance || 0;
  this.width = 0;
  this.height = 0;
  this.visible = true;
  this.measure = true;
  this.render = null;
  this.content = '';

  this.lastLeft = null;
  this.lastTop = null;
  this.lastOpacity = null;

  element.style.position = 'absolute';
  element.style.left = 0;
  element.style.top = 0;
  element.style.opacity = 0;

  THREE.Object3D.call(this);
}

MathBox.Sprite.prototype = _.extend(new THREE.Object3D(), {

});MathBox.Primitive = function (options) {
  // Allow inheritance constructor
  if (options === null) return;

  // Apply defaults and unpack styles
  var defaults = this.defaults();
  if (options) {
    options.style = _.extend(defaults.style, options.style || {});
    options = _.extend(defaults, options || {});
  }
  options = options || defaults;
  this.set(options);

  // Holds persistent object styles
  this.style = new MathBox.Style();
  this.style.set(this.get().style || {});

  // Pass through style changes
  this.on('change', function (changed) {
    if (changed.style !== undefined) {
      this.style.set(changed.style);
    }
  }.bind(this));

  // Unique primitive sequence number.
  this.set('sequence', options.sequence || ++MathBox.Primitive.sequence);

  // Auto-assign ID.
  this.set('id', options.id || this.sequence);

  // Call init method for subclass' benefit.
  this.init();
};

MathBox.Primitive.sequence = 0;

MathBox.Primitive.types = {};

MathBox.Primitive.prototype = {
  defaults: function () {
    return {};
  },

  type: function () {
    return 'primitive';
  },

  init: function () {
  },

  make: function () {
  },

  destroy: function () {
  },

  renderables: function () {
    return [];
  },

  adjust: function (viewport) {
  }//,

};

MathBox.Attributes.mixin(MathBox.Primitive);
MicroEvent.mixin(MathBox.Primitive);
/**
 * Generic curve, parametric or functional.
 */
MathBox.Curve = function (options) {
  // Allow inheritance constructor
  if (options === null) return;

  MathBox.Primitive.call(this, options);
};

MathBox.Curve.prototype = _.extend(new MathBox.Primitive(null), {

  defaults: function () {
    return {
      n: 64,
      domain: [0, 1],
      data: null,
      expression: function () { return 0; },
      live: true,
      points: false,
      line: true,
      style: {}//,
    };
  },

  type: function () {
    return 'curve';
  },

  renderables: function () {
    return [ this.line, this.points ];
  },

  adjust: function (viewport) {
    var options = this.get();
    this.line.show(options.line);
    this.points.show(options.points);

    var visible = (options.line || options.points) && this.style.get('opacity') > 0;
    visible && options.live && this.calculate();
  },

  make: function () {
    var that = this,
        options = this.get(),
        style = this.style,
        n = options.n;

    var vertices = this.vertices = [];

    // Allocate vertices.
    _.loop(n, function () {
      vertices.push(new THREE.Vector3());
    });

    // Instantiate renderables.
    var make = function (type) {
      return new MathBox.Renderable.Mesh(vertices, {
        type: type,
        dynamic: options.live,
      }, style);
    };

    this.line = make('line');
    this.points = make('points');

    this.calculate();
  },

  //////////

  calculate: function () {
    var vertices = this.vertices,
        options = this.get(),
        data = options.data,
        domain = options.domain,
        style = options.style,
        n = options.n;

    var x = domain[0],
        step = (domain[1] - x) / (n - 1);

    var p;
    _.loop(n, function (i) {
      if (data && (data[i] !== undefined)) {
        // Use data if available
        p = data[i];
      }
      else {
        // Use expression.
        p = options.expression.call(this, x, i);
      }

      // Allow both parametric (array) and functional (value) style.
      if (!(p instanceof Array)) p = [x, p, 0];
      p = p.concat([0, 0, 0]);

      // Update point
      vertices[i].set.apply(vertices[i], p);

      x += step;
    }.bind(this));

  }//,

});

MathBox.Primitive.types.curve = MathBox.Curve;
/**
 * Bezier curve of order 1-3.
 */
MathBox.Bezier = function (options) {
  MathBox.Curve.call(this, options);
};

MathBox.Bezier.prototype = _.extend(new MathBox.Curve(null), {

  defaults: function () {
    return {
      n: 64,
      domain: [0, 1],
      data: null,
      order: 3,
      expression: function () { return 0; },
      live: true,
      points: false,
      line: true,
      style: {}//,
    };
  },

  type: function () {
    return 'bezier';
  },

  //////////

  calculate: function () {
    var vertices = this.vertices,
        options = this.get(),
        domain = options.domain,
        data = options.data,
        style = options.style,
        order = options.order,
        n = options.n;

    // Verify order
    if (order < 1 || order > 3) throw "Bezier curve order must be 1, 2 or 3.";

    // Collect control points into uniform vec3 array.
    var points = [], p;
    _.loop(order + 1, function (i) {
      if (data && (data[i] !== undefined)) {
        // Use data if available
        p = data[i];
      }
      else {
        // Use expression.
        p = options.expression.call(this, i, i);
      }

      // Allow both parametric (array) and functional (value) style.
      if (!(p instanceof Array)) p = [x, p, 0];
      p = p.concat([0, 0, 0]);

      points.push(new THREE.Vector3(p[0], p[1], p[2]));
    }.bind(this));

    var uniforms = {
      bezierPoints: points,
    };

    // Write out vertices in interpolation domain.
    var x = domain[0],
        step = (domain[1] - x) / (n - 1);
    _.loop(n, function (i) {
      vertices[i].set(x, 0, 0);
      x += step;
    });

    // Apply custom position shader to renderables
    var opts = {
      uniforms: uniforms,
      shaders: {
        position: function (f, m) {
          f
            .snippet('bezier' + order)
            .snippet('mathTransform');
          m.viewport(f);
        },
      },
    };
    this.line.set(opts);
    this.points.set(opts);
  }//,

});

MathBox.Primitive.types.bezier = MathBox.Bezier;
/**
 * Axis with arrowhead and tick markers.
 */
MathBox.Axis = function (options) {
  // Allow inheritance constructor
  if (options === null) return;

  MathBox.Primitive.call(this, options);
};

MathBox.Axis.prototype = _.extend(new MathBox.Primitive(null), {

  defaults: function () {
    return {
      axis: 0,
      offset: [0, 0, 0],
      n: 2,
      arrow: true,
      line: true,
      labels: false,

      decimals: 2,
      distance: 15,
      ticks: 10,
      tickUnit: 1,
      tickScale: 10,
      size: .07,
      style: {
        lineWidth: 4,
        color: new THREE.Color(0x707070),
      },
      formatter: null,
      zero: true,
    };
  },

  renderables: function () {
    return [ this.line, this.ticks, this.arrow, this.labels ];
  },

  type: function () {
    return 'axis';
  },

  adjust: function (viewport, camera) {
    var options = this.get(),
        axis = options.axis,
        offset = options.offset,

        arrow = options.arrow,
        line = options.line,
        labels = options.labels,

        n = options.n,
        size = options.size,

        ticks = options.ticks,
        tickUnit = options.tickUnit,
        tickScale = options.tickScale,
        decimals = options.decimals,

        points = this.points,
        labelPoints = this.labelPoints,
        labelTangent = this.labelTangent,
        tickPoints = this.tickPoints,
        tickSigns = this.tickSigns;

    var p = [0, 0, 0],
        add = new THREE.Vector3(),
        four = new THREE.Vector4();

    // Prepare axis extents.
    var range = viewport.axis(axis),
        min = range[0],
        max = range[1],
        inv = (max - min) / (n - 1);

    // Prepare axis offset.
    add.set.apply(add, offset);

    // Place uniformly spaced points for axis.
    _.loop(n, function (x) {
      p[axis] = min + x * inv;

      points[x].set.apply(points[x], p);
      points[x].addSelf(add);
    });

    // Show/hide line
    this.line.show(line);

    // Show/hide arrow
    this.arrow.show(arrow);

    // Prepare scale divisions
    var scale = this.scale = MathBox.Ticks(min, max, ticks, tickUnit, tickScale, true);

    // Prepare tick marks range/scale.
    this.ticks.show(!!ticks);
    if (ticks) {
      var limit = Math.floor(tickPoints.length / 2);
      if (scale.length > limit) scale = scale.slice(0, limit);

      // Calculate epsilon vector for finding normal
      var e = [0, 0, 0], last;
      e[axis == 2 ? 0 : (1 - axis)] = (max - min) * .01;
      this.epsilon.set.apply(this.epsilon, e);

      // Place uniformly spaced pairs of points for ticks.
      var p = [0, 0, 0], mn = 100, mx = -100;
      _.each(scale, function (x, i) {
        p[axis] = x;

        // Tick points for ticks (2 each)
        var j = i*2;
        tickPoints[j].set.apply(tickPoints[j], p);
        tickPoints[j].addSelf(add);
        tickSigns[j] = 1;

        tickPoints[j+1].copy(tickPoints[j]);
        tickSigns[j+1] = -1;

        // Anchor points for label
        labelPoints[i].copy(tickPoints[j]);

        last = j + 1;
      });

      // Fill remaining vertices with last point
      var i = last + 1, n = tickPoints.length;
      while (i < n) {
        tickPoints[i].copy(tickPoints[last]);
        tickSigns[i] = tickSigns[last];
        i++;
      }
    }

    // Axis vector direction for labels
    p = [0, 0, 0];
    p[axis] = 1;
    labelTangent.set.apply(labelTangent, p);
    this.labels.show(!!labels);

    // Label formatting
    this.labels.set('decimals', decimals);
  },

  make: function () {
    var options = this.get(),
        axis = options.axis,
        n = options.n,
        size = options.size,
        ticks = options.ticks,
        distance = options.distance,
        formatter = options.formatter,
        style = this.style,
        points = this.points = [], // Points for drawing lines
        labelPoints = this.labelPoints = [], // Points for attaching labels
        labelTangent = this.labelTangent = new THREE.Vector3(), // Orientation for points and labels
        tickPoints = this.tickPoints = [], // Points for drawing ticks (doubled)
        tickSigns = this.tickSigns = [], // Alternating signs for tick shader
        epsilon = this.epsilon = new THREE.Vector3();

    // Prepare arrays of vertices.
    _.loop(n, function (x) {
      points.push(new THREE.Vector3());
    });
    _.loop(ticks * 4, function (i) {
      labelPoints.push(new THREE.Vector3());
    });
    _.loop(ticks * 8, function (i) {
      tickPoints.push(new THREE.Vector3());
      tickSigns.push(1);
    });

    // Prepare primitives
    var meshOptions = { dynamic: true, type: 'line' };
    var arrowOptions = { dynamic: true, size: size, offset: .5 };
    var tickOptions = { dynamic: true, size: size * .2 };
    var labelOptions = { dynamic: true, distance: distance };

    // Scale label callback
    var callback = function (i) {
      var x = this.scale[i];
      if (x == 0 && !options.zero) return '';
      return formatter ? formatter(x) : x;
    }.bind(this);

    // Line, arrowhead, tick marks and labels.
    this.line = new MathBox.Renderable.Mesh(points, meshOptions, style);
    this.arrow = new MathBox.Renderable.ArrowHead(points[n - 2], points[n - 1], arrowOptions, style);
    this.ticks = new MathBox.Renderable.Ticks(tickPoints, tickSigns, epsilon, tickOptions, style);
    this.labels = new MathBox.Renderable.Labels(labelPoints, labelTangent, callback, labelOptions, style);
  },

});

MathBox.Axis.validateArgs = function (options) {
  // Alternate syntax: (axis)
  if (typeof options == 'number') {
    options = { axis: options };
  }
  return options;
};

MathBox.Primitive.types.axis = MathBox.Axis;
/**
 * 2D grid of lines, based on tickmarks.
 */
MathBox.Grid = function (options) {
  // Allow inheritance constructor
  if (options === null) return;

  MathBox.Primitive.call(this, options);
};

MathBox.Grid.prototype = _.extend(new MathBox.Primitive(null), {

  defaults: function () {
    return {
      axis: [ 0, 1 ],
      offset: [0, 0, 0],
      show: [ true, true ],
      n: 2,
      ticks: [ 10, 10 ],
      tickUnit: [ 1, 1 ],
      tickScale: [ 10, 10 ],
      style: {
        lineWidth: 1,
        color: new THREE.Color(0xA0A0A0)//,
      }//,
    };
  },

  type: function () {
    return 'grid';
  },

  renderables: function () {
    return this.lines || [];
  },

  adjust: function (viewport) {

    var options = this.get(),
        axis = options.axis,
        ticks = options.ticks,
        tickUnit = options.tickUnit,
        tickScale = options.tickScale,
        n = options.n,
        show = options.show,
        offset = options.offset,
        points = this.points,
        count = this.count,
        limit = this.limit;

    var ranges = [];

    // Symmetrical grid division
    if (typeof n == 'number') {
      n = [n, n];
    }

    // Prepare axis extents.
    _.each(axis, function (axis, i) {
      var range = viewport.axis(axis);
      ranges.push({
        axis: axis,
        min: range[0],
        max: range[1],
        inv: (range[1] - range[0]) / (n[i] - 1),
        ticks: ticks[i],
        tickUnit: tickUnit[i],
        tickScale: tickScale[i],
      });
    });

    // Place uniformly spaced points for each direction.
    function generate(points, a, b, limit, n) {
      var p = offset.slice(), i = 0;

      // Get ticks in main direction
      var scale = MathBox.Ticks(a.min, a.max, a.ticks, a.tickUnit, a.tickScale, true);

      // Cap scale to available lines
      if (scale.length > limit) scale = scale.slice(0, limit);

      // Create line along each tick.
      _.each(scale, function (tick) {
        p[a.axis] = tick + offset[a.axis];
        p[b.axis] = b.min + offset[b.axis];

        // N equally spaced line segments
        _.loop(n - 1, function (x) {
          points[i].set.apply(points[i], p);
          i++;

          p[b.axis] += b.inv;
          points[i].set.apply(points[i], p);
          i++;
        });
      });

      var last = Math.max(0, i - 1),
          count = points.length;
      while (i < count) {
        points[i++].copy(points[last]);
      }
    };

    this.lines[0].show(show[0]);
    this.lines[1].show(show[1]);

    show[0] && generate(points[0], ranges[1], ranges[0], limit[0], n[0]);
    show[1] && generate(points[1], ranges[0], ranges[1], limit[1], n[1]);
  },

  make: function (materials) {
    var options = this.get(),
        axis = options.axis,
        ticks = options.ticks,
        n = options.n,
        points = this.points = [[], []],
        style = this.style;

    // Symmetrical grid division
    if (typeof n == 'number') {
      n = [n, n];
    }

    // Count number of vertices necessary
    var limit = this.limit = [0, 0];

    // Prepare arrays of vertices.
    _.each(ticks, function (tick, i) {
      i = 1 - i;
      limit[i] = tick * 4;
      _.loop(limit[i] * (n[i] - 1) * 2, function (x) {
        points[i].push(new THREE.Vector3());
      });
    });

    // Line, arrowhead and tick marks.
    this.lines = [];
    this.lines.push(new MathBox.Renderable.Mesh(points[0], { type: 'line', strip: false, dynamic: true }, style));
    this.lines.push(new MathBox.Renderable.Mesh(points[1], { type: 'line', strip: false, dynamic: true }, style));
  }//,

});

MathBox.Primitive.types.grid = MathBox.Grid;
/**
 * One or more vectors with given start and end points.
 */
MathBox.Vector = function (options) {
  // Allow inheritance constructor
  if (options === null) return;

  MathBox.Primitive.call(this, options);

  this.render = [];
  this.arrows = [];
  this.vertices = null;
  this.points = null;
  this.line = null;

  this.on('change', function (changed) {
    if (changed.size !== undefined) {
      _.each(this.arrows, function (arrow) {
        arrow.set('size', changed.size);
      });
    }
  });
};

MathBox.Vector.prototype = _.extend(new MathBox.Primitive(null), {

  defaults: function () {
    return {
      n: 1,
      data: null,
      arrow: true,
      expression: function () { return 0; },
      live: true,
      style: {},
      size: .07//,
    };
  },

  type: function () {
    return 'vector';
  },

  renderables: function () {
    return this.render;
  },

  adjust: function (viewport) {
    var options = this.get();

    // Vector foreshortening requires live to be always-on
    (options.arrow || options.live) && this.calculate(viewport);
    _.each(this.arrows, function (arrow) {
      arrow.show(options.arrow);
    });
  },

  make: function () {
    var that = this,
        options = this.get(),
        arrow = options.arrow,
        style = this.style,
        n = options.n;

    var vertices = this.vertices = [];
    var points = this.points = [];
    var render = this.render = [];
    var arrows = this.arrows = [];

    var lineOptions = { dynamic: options.live, type: 'line', strip: false };
    var arrowOptions = { size: options.size };

    // Allocate vertices for line segments.
    // Allocate arrowheads if arrows requested.
    var i = 0;
    _.loop(n, function () {
      vertices.push(new THREE.Vector3());
      vertices.push(new THREE.Vector3());
      points.push(new THREE.Vector3());
      points.push(new THREE.Vector3());

      if (arrow) { // arrows are expensive for now, only allocate if requested on creation
        var arrowhead = new MathBox.Renderable.ArrowHead(points[i++], points[i++], arrowOptions, style);
        render.push(arrowhead);
        arrows.push(arrowhead);
      }
    });

    this.line = new MathBox.Renderable.Mesh(vertices, lineOptions, style);
    render.push(this.line);

    this.calculate();
  },

  //////////

  calculate: function (viewport) {
    var vertices = this.vertices,
        arrows = this.arrows,
        points = this.points,
        options = this.get(),
        data = options.data,
        arrow = options.arrow,
        n = options.n,
        size = options.size,
        scale = this.style.get('mathScale');

    // Find necessary foreshortening factors so line does not stick out through the arrowhead.
    var last = new THREE.Vector3(),
        current = new THREE.Vector3();

    var j = 0, k = 0;
    _.loop(n * 2, function (i) {
      if (data && (data[i] !== undefined)) {
        // Use data if available
        p = data[i];
      }
      else {
        // Use expression.
        p = options.expression.call(this, k, j);
      }

      // Allow both parametric (array) and functional (value) style.
      if (!(p instanceof Array)) p = [i, p, 0];
      p = p.concat([0, 0, 0]);

      // Update point
      points[i].set.apply(points[i], p);

      // Shorten line segment to make room for arrow
      vertices[i].set.apply(vertices[i], p);
      if (viewport && arrow && (i % 2 == 1)) {
        // Find vector's world-space length
        current.copy(vertices[i]);
        last.copy(vertices[i-1]);
        viewport.to(current);
        viewport.to(last);
        current.subSelf(last).multiplySelf(scale);

        var l = current.length();

        var clipped = Math.min(1, l * .5 / size);
        clipped = (1 - (1 - clipped) * (1 - clipped)) * size;

        // Foreshorten line
        var f = l - clipped;
        current.normalize().multiplyScalar(f).divideSelf(scale).addSelf(last);

        // Transform back
        viewport.from(current);
        vertices[i].copy(current);

        // Set arrowhead size
        arrows[k].set({ size: clipped });
      }

      // Start/end + vector indices
      k = j ? k + 1 : k;
      j = (j+1)%2;

    }.bind(this));

  }//,

});

MathBox.Primitive.types.vector = MathBox.Vector;
/**
 * Generic surface, parametric or functional.
 */
MathBox.Surface = function (options) {
  // Allow inheritance constructor
  if (options === null) return;

  MathBox.Primitive.call(this, options);
};

MathBox.Surface.prototype = _.extend(new MathBox.Primitive(null), {

  defaults: function () {
    return {
      n: [ 64, 64 ],
      domain: [[0, 1], [0, 1]],
      data: null,
      expression: function () { return 0; },
      live: true,
      points: false,
      line: false,
      mesh: true,
      doubleSided: true,
      flipSided: false,
      shaded: true,
      style: {}//,
    };
  },

  type: function () {
    return 'surface';
  },

  renderables: function () {
    return [ this.mesh, this.line, this.points ];
  },

  adjust: function (viewport) {
    var options = this.get();

    this.mesh.show(options.mesh);
    this.line.show(options.line);
    this.points.show(options.points);

    var visible = (options.mesh || options.line || options.points) && this.style.get('opacity') > 0;
    visible && options.live && this.calculate();
  },

  make: function () {
    var that = this,
        options = this.get(),
        style = this.style,
        n = options.n;

    if (typeof n == 'number') {
      n = [n, n];
    }

    // Use PlaneGeometry to allocate vertices/uvs.
    var geometry = this.geometry = new THREE.PlaneGeometry(2, 2, n[0] - 1, n[1] - 1);
    this.vertices = geometry.vertices;

    // Instantiate renderable.
    this.mesh = new MathBox.Renderable.Mesh(geometry, {
      type: 'mesh',
      doubleSided: options.doubleSided,
      flipSided: options.flipSided,
      shaded: options.shaded,
      smooth: true,
      dynamic: options.live,
    }, style);
    this.line = new MathBox.Renderable.Mesh(geometry, {
      type: 'mesh',
      shaded: options.shaded,
      smooth: true,
      dynamic: options.live,
      wireframe: true
    }, style);
    this.points = new MathBox.Renderable.Mesh(geometry.vertices, {
      type: 'points',
      dynamic: options.live,
    }, style);

    // Prepare tangent arrays for shading
    if (options.shaded) {
      var tangents = this.tangents = [[], []];
      _.loop(n[0] * n[1], function () {
        tangents[0].push(new THREE.Vector3());
        tangents[1].push(new THREE.Vector3());
      });
    }

    this.calculate();
  },

  //////////

  calculate: function () {
    var vertices = this.vertices,
        tangents = this.tangents,
        options = this.get(),
        data = options.data,
        domain = options.domain,
        style = options.style,
        n = options.n,
        shaded = options.shaded,
        flipSided = options.flipSided;

    var iu = flipSided ? 1 : 0,
        iv = flipSided ? 0 : 1;

    if (typeof n == 'number') {
      n = [n, n];
    }

    var x = domain[0][0],
        y = domain[1][0],
        stepX = (domain[0][1] - x) / (n[0] - 1),
        stepY = (domain[1][1] - y) / (n[1] - 1);

    // Calculate positions of vertices
    var p, o = 0;
    _.loop(n[1], function (j) {
      x = domain[0][0];
      _.loop(n[0], function (i) {
        if (data && (data[j] !== undefined) && (data[j][i] !== undefined)) {
          // Use data if available
          p = data[j][i];
        }
        else {
          // Use expression.
          p = options.expression.call(this, x, y, i, j, o);
        }

        // Allow both parametric (array) and functional (value) style.
        if (!(p instanceof Array)) p = [x, p, y];
        p = p.concat([0, 0, 0]);

        // Update point
        vertices[o].set.apply(vertices[o], p);

        x += stepX;
        o++;
      }.bind(this));
      y += stepY;
    }.bind(this));

    // Calculate tangents for shading correctly after warping transforms
    if (options.shaded) {
      o = 0;
      y = domain[1][0];

      var stride = n[0],
          epsilon = 0.01;

      _.loop(n[1], function (j) {
        x = domain[0][0];

        var up = j ? j - 1 : 0,
            down = Math.min(n[1] - 1, j + 1);

        _.loop(n[0], function (i) {

          var left = i ? i - 1 : 0,
              right = Math.min(n[0] - 1, i + 1);

          // Central differences
          var v = vertices[i + j * stride];

          /* high quality */
          /*
          tangents[0][o].sub(vertices[right + j * stride], vertices[left + j * stride]).multiplyScalar(epsilon).addSelf(v);
          tangents[1][o].sub(vertices[i + down * stride], vertices[i + up * stride]).multiplyScalar(epsilon).addSelf(v);
          */

          /* low quality */
          if (right == i) {
            tangents[0][o].sub(v, vertices[left + j * stride]).addSelf(v);
          }
          else {
            tangents[0][o].copy(vertices[right + j * stride]);
          }

          if (down == j) {
            tangents[1][o].sub(v, vertices[i + up * stride]).addSelf(v);
          }
          else {
            tangents[1][o].copy(vertices[i + down * stride]);
          }

          x += stepX;
          o++;
        });
        y += stepY;
      });

      this.line.set('attributes', {
        positionDU: tangents[iu],
        positionDV: tangents[iv],
      });
      this.mesh.set('attributes', {
        positionDU: tangents[iu],
        positionDV: tangents[iv],
      });
    }

  }//,

});

MathBox.Primitive.types.surface = MathBox.Surface;
/**
 * Bezier surface of order 3.
 */
MathBox.BezierSurface = function (options) {
  this.matrixX = new THREE.Matrix4();
  this.matrixY = new THREE.Matrix4();
  this.matrixZ = new THREE.Matrix4();

  this.coefficients = new THREE.Matrix4(
    -1,  3, -3,  1,
     3, -6,  3,  0,
    -3,  3,  0,  0,
     1,  0,  0,  0//,
  );
  MathBox.Surface.call(this, options);
};

MathBox.BezierSurface.prototype = _.extend(new MathBox.Surface(null), {

  defaults: function () {
    return {
      n: [ 64, 64 ],
      domain: [[0, 1], [0, 1]],
      data: null,
      order: 3,
      expression: function () { return 0; },
      live: true,
      points: false,
      line: false,
      mesh: true,
      doubleSided: true,
      flipSided: false,
      shaded: true,
      style: {}//,
    };
  },

  type: function () {
    return 'bezierSurface';
  },

  //////////

  calculate: function () {
    var vertices = this.vertices,
        options = this.get(),
        domain = options.domain,
        data = options.data,
        style = options.style,
        order = options.order,
        shaded = options.shaded,
        n = options.n;

    if (typeof n == 'number') {
      n = [n, n];
    }

    // Verify order
    if (order != 3) throw "Bezier surface order must be 3.";

    // Collect control points into uniform vec3 array.
    var points = [], p;
    _.loop(order + 1, function (j) {
      _.loop(order + 1, function (i) {
        if (data && (data[j] !== undefined) && (data[j][i] !== undefined)) {
          // Use data if available
          p = data[j][i];
        }
        else {
          // Use expression.
          p = options.expression.call(this, i, j, i, j);
        }

        // Allow both parametric (array) and functional (value) style.
        if (!(p instanceof Array)) p = [i, p, j];
        p = p.concat([0, 0, 0]);

        points.push(p);
      }.bind(this));
    }.bind(this));

    // Collect control coordinates into X/Y/Z matrices.
    p = points;
    this.matrixX.set(
      p[0][0],  p[1][0],  p[2][0],  p[3][0],
      p[4][0],  p[5][0],  p[6][0],  p[7][0],
      p[8][0],  p[9][0],  p[10][0], p[11][0],
      p[12][0], p[13][0], p[14][0], p[15][0]//,
    );
    this.matrixY.set(
      p[0][1],  p[1][1],  p[2][1],  p[3][1],
      p[4][1],  p[5][1],  p[6][1],  p[7][1],
      p[8][1],  p[9][1],  p[10][1], p[11][1],
      p[12][1], p[13][1], p[14][1], p[15][1]//,
    );
    this.matrixZ.set(
      p[0][2],  p[1][2],  p[2][2],  p[3][2],
      p[4][2],  p[5][2],  p[6][2],  p[7][2],
      p[8][2],  p[9][2],  p[10][2], p[11][2],
      p[12][2], p[13][2], p[14][2], p[15][2]//,
    );

    // Apply bezier control weights for cubic polynomial
    var m0 = this.coefficients;
    this.matrixX.multiplySelf(m0).transpose().multiplySelf(m0);
    this.matrixY.multiplySelf(m0).transpose().multiplySelf(m0);
    this.matrixZ.multiplySelf(m0).transpose().multiplySelf(m0);

    var uniforms = {
      bezierSurfaceX: this.matrixX,
      bezierSurfaceY: this.matrixY,
      bezierSurfaceZ: this.matrixZ,
    };

    // Write out vertices in interpolation domain.
    var x = domain[0][0],
        y = domain[1][0],
        stepX = (domain[0][1] - x) / (n[0] - 1),
        stepY = (domain[1][1] - y) / (n[1] - 1);
    var o = 0;
    _.loop(n[1], function (j) {
      x = domain[0][0];
      _.loop(n[0], function (i) {
        vertices[o].set(x, y, 0);

        x += stepX;
        o++;
      }.bind(this));
      y += stepY;
    }.bind(this));

    // Apply custom position/fragment shader to renderable
    var opts = {
      uniforms: uniforms,
      shaders: {
        position: function (f, m) {
          if (shaded) {
            f.snippet('bezierSurface' + order)

            // Transform position + DU/DV
            f.group()
              f.snippet('mathTransform');
              m.viewport(f);
            f.next();
              f.snippet('mathTransform');
              m.viewport(f);
            f.next();
              f.snippet('mathTransform');
              m.viewport(f);
            f.combine();
          }
          else {
            // Transform just position
            f
              .snippet('bezierSurface' + order)
              .snippet('mathTransform');
            m.viewport(f);
          }
        },
      },
    };
    this.mesh.set(opts);
    this.line.set(opts);
    this.points.set(opts);

  }//,

});

MathBox.Primitive.types.bezierSurface = MathBox.BezierSurface;
/**
 * Platonic solid
 * (only cubes for now, need to figure clean way to build three.js extras in)
 */
MathBox.Platonic = function (options) {
  // Allow inheritance constructor
  if (options === null) return;

  MathBox.Primitive.call(this, options);
};

MathBox.Platonic.prototype = _.extend(new MathBox.Primitive(null), {

  defaults: function () {
    return {
      n: 1,
      type: 'cube',
      points: false,
      line: false,
      mesh: true,
      doubleSided: true,
      flipSided: false,
      shaded: true,
      style: {}//,
    };
  },

  type: function () {
    return 'platonic';
  },

  renderables: function () {
    return [ this.mesh, this.line, this.points ];
  },

  adjust: function (viewport) {
    var options = this.get();

    this.mesh.show(options.mesh);
    this.line.show(options.line);
    this.points.show(options.points);
  },

  make: function () {
    var that = this,
        options = this.get(),
        style = this.style,
        n = options.n,
        type = options.type;

    var geometry;
    switch (type) {
      case 'cube':
        geometry = new THREE.CubeGeometry(2, 2, 2, 1, 1, 1);
        break;
    }

    // Instantiate renderable.
    this.mesh = new MathBox.Renderable.Mesh(geometry, {
      type: 'mesh',
      doubleSided: options.doubleSided,
      flipSided: options.flipSided,
      shaded: options.shaded,
      smooth: false,
      dynamic: options.live,
    }, style);
    this.line = new MathBox.Renderable.Mesh(geometry, {
      type: 'mesh',
      shaded: options.shaded,
      smooth: false,
      dynamic: options.live,
      wireframe: true
    }, style);
    this.points = new MathBox.Renderable.Mesh(geometry.vertices, {
      type: 'points',
      dynamic: options.live,
    }, style);

  }//,

});

MathBox.Primitive.types.platonic = MathBox.Platonic;
MathBox.Renderable = function (options, style) {
  // Allow inheritance constructor
  if (options === null) return;

  // Unique renderable ID.
  this.id = ++MathBox.Renderable.id;

  // Apply defaults
  var defaults = this.defaults();
  if (options) {
    options = _.extend(defaults, options || {});
  }
  options = options || defaults;
  this.set(options);

  // Wrap a three.js renderable.
  this.object = null;
  this.material = null;
  this.geometry = null;
  this.visible = true;

  // Update on style/uniforms change
  this.style = style || new MathBox.Style();
  this.style.on('change', this.styleCallback = this.refreshStyle.bind(this));
  this.on('change', this.uniformsCallback = this.refreshOptions.bind(this));

  // Combined user-defined math-space transform
  this.mathTransform = new THREE.Matrix4();
};

MathBox.Renderable.id = 0;

MathBox.Renderable.prototype = {
  defaults: function () {
    return {};
  },

  make: function (materials) {
  },

  destroy: function () {
  },

  show: function (show) {
    var change = (show === undefined ? true : !!show);
    if (change != this.visible) {
      this.visible = change;
      this.refresh();
    }
  },

  isVisible: function () {
    return this.object && this.object.visible;
  },

  composeTransform: function (position, rotation, scale) {
		var mRotation = THREE.Matrix4.__m1;
		var mScale = THREE.Matrix4.__m2;

    mRotation.identity();
		mRotation.setRotationFromEuler(rotation, this.object.eulerOrder);

		mScale.makeScale(scale.x, scale.y, scale.z);

		this.mathTransform.multiply(mRotation, mScale);

    var te = this.mathTransform.elements;
		te[12] = position.x;
		te[13] = position.y;
		te[14] = position.z;
  },

  refreshStyle: function (changed) {
    var style = this.style.get();
    changed = changed || style;

    if (this.material) {
      this.material.applyUniforms(changed);
    }

    if (this.object) {
      // No point in culling if everything is dynamic / GLSL based
      this.object.frustumCulled = false;

      // Apply user-defined world transforms through three.js modelView matrix.
      if (changed.worldPosition) this.object.position = style.worldPosition;
      if (changed.worldRotation) this.object.rotation = style.worldRotation;
      if (changed.worldScale) this.object.scale = style.worldScale;

      // Prepare combined mathTransform matrix
      if (changed.mathPosition || changed.mathRotation || changed.mathScale) {
        this.composeTransform(style.mathPosition, style.mathRotation, style.mathScale);

        if (this.material) {
          this.material.applyUniforms({ mathTransform: this.mathTransform });
        }
      }

      // Set visibility
      if (changed.opacity !== undefined) {
        this.object.visible = this.visible && (style.opacity > 0);
      }

      // Set zIndex
      if ((changed.opacity !== undefined || changed.zIndex !== undefined) && this.material) {
        // Solid objects are drawn front to back
        // Transparent objects are drawn back to front
        // Always make sure positive zIndex makes it draw on top of everything else
        var sign = (style.opacity == 1) ? 1 : -1;
        this.object.renderDepth = style.zIndex * sign;
      }
    }
  },

  refreshOptions: function (changed) {
    var options = this.get();
    changed = changed || options;

    if (this.material) {
      options = this.get();

      if (changed.doubleSided !== undefined || changed.flipSided !== undefined) {
        // Set double sided / culling order.
        this.material.side = options.doubleSided ? THREE.DoubleSide :
                             THREE.FrontSide;
        options = { flipSided: (options.doubleSided && options.flipSided) ? -1 : 1 };
        this.material.applyUniforms(options);
      }

      // Apply custom uniforms
      options = this.get().uniforms;
      if (options) {
        this.material.applyUniforms(options);
      }

      // Apply custom attributes
      options = this.get().attributes;
      if (options) {
        this.material.applyAttributes(options);
      }
    }
  },

  refresh: function () {
    this.refreshStyle();
    this.refreshOptions();
  },

  adjust: function (viewport) {
    if (this.material) {
       this.material.applyUniforms(viewport.uniforms());
    }
  }//,

};

MathBox.Attributes.mixin(MathBox.Renderable);
/**
 * Generic renderable of vertices for points/lines/surfaces.
 */
MathBox.Renderable.Mesh = function (points, options, style) {
  this.points = points;

  MathBox.Renderable.call(this, options, style);
};

MathBox.Renderable.Mesh.prototype = _.extend(new MathBox.Renderable(null), {

  defaults: function () {
    return {
      type: 'points',
      doubleSided: true,
      dynamic: false,
      absolute: false,
      strip: true,
      shaders: {},
    };
  },

  make: function (materials) {
    var options = this.get(),
        type = options.type,
        strip = options.strip,
        shaders = options.shaders;

    // Decide on THREE renderable.
    var klass = {
      points: THREE.ParticleSystem,
      line: THREE.Line,
      mesh: THREE.Mesh//,
    }[type];
    if (!klass) throw "Invalid Mesh type '"+ type +"'";

    // Prepare material / shadergraph
    var material = this.material = materials.generic(options);

    // Prepare geometry
    var geometry, points = this.points;
    if (points instanceof Array) {
      // Default, vertices-only
      geometry = this.geometry = new THREE.Geometry();
      geometry.vertices = this.points;
    }
    else {
      // Pass through
      geometry = this.geometry = points;
    }
    geometry.dynamic = options.dynamic;

    // Prepare object3d
    var object;
    switch (type) {
      case 'line':
        object = new THREE.Line(geometry, material, strip ? THREE.LineStrip : THREE.LinePieces);
        break;
      default:
        object = new klass(geometry, material);
        break;
    }
    this.object = object;

    // Refresh material uniforms.
    this.refresh();
  },

  adjust: function (viewport) {
    if (this.get().dynamic) {
      this.geometry.verticesNeedUpdate = true;
    }
    MathBox.Renderable.prototype.adjust.call(this, viewport);
  }//,

});
/**
 * Arrowhead, constant screen-space size.
 */
MathBox.Renderable.ArrowHead = function (from, to, options, style) {
  this.from = from;
  this.to = to;

  MathBox.Renderable.call(this, options, style);
};

MathBox.Renderable.ArrowHead.geometry = new THREE.CylinderGeometry(.33, 0, 1, 16, 1);

MathBox.Renderable.ArrowHead.prototype = _.extend(new MathBox.Renderable(null), {

  defaults: function () {
    return {
      offset: 0,
      absolute: true,
      size: .1//,
    };
  },

  make: function (materials) {
    var options = this.get();

    // Make material.
    var material = this.material = materials.generic(options);

    this._from = new THREE.Vector3();
    this._to = new THREE.Vector3();

    this.diff = new THREE.Vector3();
    this.bi = new THREE.Vector3();
    this.normal = new THREE.Vector3(0, 0, 1);

    // Make cone mesh
    var geometry = this.geometry = MathBox.Renderable.ArrowHead.geometry;
    this.object = new THREE.Mesh(geometry, material);

    // Refresh material uniforms.
    this.refresh();
  },

  isVisible: function () {
    return this.visible && (this.style.get('opacity') > 0);
  },

  adjust: function (viewport) {
    var options = this.get();
    var offset = options.offset;

    // Calculate arrow in world space
    var from = this._from.copy(this.from);
    var to = this._to.copy(this.to);
    this.mathTransform.multiplyVector3(from);
    this.mathTransform.multiplyVector3(to);
    viewport.to(from);
    viewport.to(to);

    // Calculate axis of arrowhead.
    var diff = this.diff.sub(from, to);
    if (diff.length() < .001) {
      this.object.visible = false;
      return;
    }
    else {
      this.object.visible = this.visible;
    }

    diff = diff.normalize();

    // Prepare 'random' normal
    this.normal.x = this.diff.y + .1;
    this.normal.y = this.diff.z + .2;
    this.normal.z = this.diff.x + .3;
    this.normal.normalize();

    // Prepare binormal
    var bi = this.bi.cross(this.normal, this.diff);

    // Renormalize axes.
    var normal = this.normal.cross(this.bi, this.diff);

    // Prepare object matrix to place arrowhead
    var size = options.size;
    var matrix = new THREE.Matrix4(
      bi.x, diff.x, normal.x, to.x,
      bi.y, diff.y, normal.y, to.y,
      bi.z, diff.z, normal.z, to.z,
      0, 0, 0, 1//,
    )
    .scale(new THREE.Vector3(size, size, size));

    // Add arrowhead transform before object matrix
    this.object.updateMatrix();
    this.object.matrix.multiplySelf(matrix);

    // Move cone down so tip is at 0,0,0
    matrix.identity().setPosition({ x: 0, y: 0.5 - offset, z: 0 });
    this.object.matrix.multiplySelf(matrix);

    // Override object matrix
    this.object.matrixAutoUpdate = false;
    this.object.matrixWorldNeedsUpdate = true;

    MathBox.Renderable.prototype.adjust.call(this, viewport);
  },

});

/**
 * Tickmarks on an axis, constant screen space size.
 */
MathBox.Renderable.Ticks = function (points, signs, epsilon, options, style) {
  this.points = points;
  this.signs = signs;
  this.epsilon = epsilon;

  MathBox.Renderable.call(this, options, style);
};

MathBox.Renderable.Ticks.prototype = _.extend(new MathBox.Renderable(null), {

  defaults: function () {
    return {
      dynamic: false,
      absolute: false,
      size: .1//,
    };
  },

  make: function (materials) {
    var options = this.get(),
        points = this.points,
        signs = this.signs;

    // Prepare material with custom position shader
    var materialOptions = {
      type: 'line',
      shaders: {
        position: function (f, m) {
          // Add snippet to load vertex position.
          m.position(f, options);

          // Calculate position and position + epsilon
          f.snippet('tickVertexSplit');

          // Transform positions to viewport
          f.group();
            // Transform position
            m.viewport(f);
          f.next();
            // Transform position + epsilon
            m.viewport(f);
          f.combine();

          // Transform both vectors into tick vertex
          f.snippet('tickVertexJoin');
        },
      },
    };
    var material = this.material = materials.generic(materialOptions);

    // Prepare geometry
    var geometry = this.geometry = new THREE.Geometry();
    geometry.vertices = points;

    // Prepare object3d
    var object = new THREE.Line(geometry, material, THREE.LinePieces);
    this.object = object;

    // Refresh material uniforms.
    this.refresh();
  },

  adjust: function (viewport) {
    var options = this.get();
    this.material && this.material.applyAttributes({
      tickSign: this.signs,
    });
    this.material && this.material.applyUniforms({
      tickEpsilon: this.epsilon,
      tickSize: options.size//,
    });

    if (options.dynamic) {
      this.material.attributes.tickSign.needsUpdate = true;
      this.geometry.verticesNeedUpdate = true;
    }

    MathBox.Renderable.prototype.adjust.call(this, viewport);
  }//,

});
/**
 * Label, text labels anchored to points in 3D
 *
 * Note: uses CSS3D renderer classes, but positions overlays in 2D using the custom
 * overlay class. This avoids fuzzy text and undesirable scaling of text.
 */
MathBox.Renderable.Labels = function (points, tangent, callback, options, style) {
  this.points = points;
  this.tangent = tangent;
  this.callback = callback;

  this.sprites = [];

  MathBox.Renderable.call(this, options, style);
};

MathBox.Renderable.Labels.prototype = _.extend(new MathBox.Renderable(null), {

  defaults: function () {
    return {
      absolute: true,
      distance: 15,
      size: 1//,
    };
  },

  make: function (materials) {
    var options = this.get(),
        points = this.points,
        tangent = this.tangent,
        sprites = this.sprites,
        n = this.points.length;

    // Reusable vector for later.
    this._anchor = new THREE.Vector3();

    // Make parent object to hold all the label divs in one Object3D.
    var element = document.createElement('div');
    var object = this.object = new MathBox.Sprite(element);
    element.className = 'mathbox-labels';

    // Make sprites for all labels
    _.loop(n, function (i) {
      // Nested div to allow for relative positioning for centering
      var element = document.createElement('div');
      var inner = document.createElement('div');
      element.appendChild(inner);

      // Sprite object
      var sprite = new MathBox.Sprite(element, tangent);

      // Position at anchor point
      element.className = 'mathbox-label';
      inner.className = 'mathbox-wrap';
      inner.style.position = 'relative';
      inner.style.display = 'inline-block';
      inner.style.left = '-50%';
      inner.style.top = '-.5em';

      sprites.push(sprite);
      object.add(sprite);
    });

    // Refresh material uniforms.
    //this.refresh();
  },

  adjust: function (viewport, camera, width, height, stage) {
    var options = this.get(),
        points = this.points,
        sprites = this.sprites,
        callback = this.callback,
        anchor = this._anchor,
        distance = options.distance,
        decimals = options.decimals,
        style = this.style,
        opacity = style.get('opacity');

    var mathjax = window.MathJax && MathJax.Hub;

    var ilog10 = 1/Math.log(10);

    // Update labels
    _.each(sprites, function (sprite, i) {

      // Transform anchor point
      sprite.position.copy(points[i]);
      viewport.to(sprite.position);
      stage.matrix.multiplyVector3(sprite.position);
      sprite.distance = options.distance;

      // Set opacity
      sprite.opacity = opacity;

      // Set content
      var text = '';
      if (callback) {
        // Get text
        text = callback(i);
        if (text === undefined) text = '';

        // Try to cast to number and round to n decimals
        if (+text == text) {
          var x = +text;
          if (x != 0) {
            var s = x < 0 ? -1 : 1;
            x = Math.abs(x);
            var unit = Math.pow(10, (decimals - 1) - Math.floor(Math.log(x) * ilog10));
            x = s * Math.round(unit * x) / unit;
            text = x;
          }
        }

        if (!mathjax) {
          text = (''+text).replace(/^-/, '–');
        }
      }

      if (sprite.content !== text) {
        var inner = sprite.element.children[0];

        sprite.content = text;
        sprite.measure = true;

        if (mathjax) {
          inner.innerHTML = "\\(" + text + "\\)";
          MathJax.Hub.queue.Push(["Typeset", MathJax.Hub, inner]);
        }
        else {
          inner.innerHTML = text;
        }
      }
    });

    MathBox.Renderable.prototype.adjust.call(this, viewport);
  },


});

/**
 * Generic viewport base class
 */
MathBox.Viewport = function (options) {
  if (options === null) return;

  var defaults = this.defaults();
  options = _.extend(defaults, options || {});
  this.set(options);

  this.singleton = 'viewport';

  this._uniforms = {};
};

MathBox.Viewport.prototype = {

  defaults: function () {
    return {
      type: 'none',
      rotation: [0, 0, 0],
      position: [0, 0, 0],
    };
  },

  uniforms: function () {
    return this._uniforms;
  },

  axis: function (axis) {
    return [0, 1];
  },

  to: function (vector) {
  },

  from: function (vector) {
  },

  update: function (stage) {
    var options = this.get();
    _.each(['position', 'rotation'], function (key) {
      stage[key].set.apply(stage[key], options[key]);
    });
  },

  shader: function (factory) {
    factory.snippet('mathToWorld');
  },

  validateRotation: function (v) {
    if (v.constructor == Array) {
      v = v.concat([0, 0, 0]);
      return v.slice(0, 3);
    }
    return this.get('rotation');
  },

  validatePosition: function (v) {
    if (v.constructor == Array) {
      v = v.concat([0, 0, 0]);
      return v.slice(0, 3);
    }
    return this.get('position');
  },

};

MathBox.Attributes.mixin(MathBox.Viewport, "type");

MathBox.Viewport.types = {};

MathBox.Viewport.make = function (options) {
  var type = options.type;
  var klass = MathBox.Viewport.types[type]
           || MathBox.Viewport.types['cartesian']
           || MathBox.Viewport;
  return new klass(options);
};

MathBox.ViewportCartesian = function (options) {
  if (options === null) return;

  var _super = MathBox.Viewport;
  _super.call(this, options);
  this.super = _super.prototype;

  // Prepare transform matrices
  this.transform = new THREE.Matrix4();
  this.inverse = new THREE.Matrix4();

  // Prepare uniforms
  _.extend(this._uniforms, {
    viewportTransform: this.transform,
    viewportInverse: this.inverse//,
  });
};

MathBox.ViewportCartesian.prototype = _.extend(new MathBox.Viewport(null), {

  defaults: function () {
    return {
      type: 'cartesian',
      range: [[-1, 1], [-1, 1], [-1, 1]],
      scale: [1, 1, 1],
      rotation: [0, 0, 0],
      position: [0, 0, 0],
    };
  },

  to: function (vector) {
    this.transform.multiplyVector3(vector);
  },

  from: function (vector) {
    this.inverse.multiplyVector3(vector);
  },

  axis: function (axis) {
    var range = this.get().range[axis],
        a = range[0],
        b = range[1],
        min = Math.min(a, b),
        max = Math.max(a, b);

    return [min, max];
  },

  update: function (stage) {
    var o = this.get(),
        r = o.range,
        s = o.scale;

    var x = r[0][0],
        y = r[1][0],
        z = r[2][0],
        dx = r[0][1] - x,
        dy = r[1][1] - y,
        dz = r[2][1] - z,
        sx = s[0],
        sy = s[1],
        sz = s[2];

    // Forward transform
    var transform = [
      2*sx/dx, 0, 0, -(2*x+dx)*sx/dx,
      0, 2*sy/dy, 0, -(2*y+dy)*sy/dy,
      0, 0, 2*sz/dz, -(2*z+dz)*sz/dz,
      0, 0, 0, 1,
    ];

    // Backward transform
    var inverse = [
      dx/(2*sx), 0, 0, (x+dx/2),
      0, dy/(2*sy), 0, (y+dy/2),
      0, 0, dz/(2*sz), (z+dz/2),
      0, 0, 0, 1,
    ];

    this.transform.set.apply(this.transform, transform);
    this.inverse.set.apply(this.inverse, inverse);

    MathBox.Viewport.prototype.update.call(this, stage);
  },

  // Attribute validators

  validateRange: function (range) {
    range = range || [];

    for (var j = 0; j < 3; ++j) {
      range[j] = range[j] || [];
      for (var i = 0; i < 2; ++i) {
        range[j][i] = range[j][i] !== undefined ? range[j][i] : (i*2-1);
      }
    }

    return range;
  },

  validateScale: function (scale) {
    scale = scale || [];

    for (var j = 0; j < 3; ++j) {
      scale[j] = scale[j] || 1;
    }

    return scale;
  }//,

});

MathBox.Attributes.mixin(MathBox.Viewport);

MathBox.Viewport.types.cartesian = MathBox.ViewportCartesian;
/**
 * Cartesian to polar viewport transform.
 *
 * To animate the transition, the origin of the polar coordinate grid (the focus) is moved
 * from infinity out to 0. In doing so, grid lines in the X direction bend smoothly from
 * straight lines (circles of infinite radius) into circular arcs, while grid lines in the Y
 * direction transition from being parallel (meeting at infinity) to crossing at the origin.
 *
 * The trickiest part is the correction for non-square aspect ratios. Because the scale in
 * the radial direction is entirely arbitrary, the 'circles' are actually ellipses in
 * math-space that are squished back into circles in world-space.
 */
MathBox.ViewportPolar = function (options) {
  var _super = MathBox.ViewportCartesian;
  _super.call(this, options);
  this.super = _super.prototype;

  // Prepare uniforms
  _.extend(this._uniforms, {
    polarAlpha:  0,
    polarAspect: 1,
    polarPower:  1,
    polarFold:   1,
    polarFocus:  1,
    polarHelix:  0,//,
  });
};

MathBox.ViewportPolar.prototype = _.extend(new MathBox.ViewportCartesian(null), {

  defaults: function () {
    return {
      type: 'polar',
      range: [[-1, 1], [-1, 1], [-1, 1]],
      polar: 1,
      fold:  1,
      power: 1,
      helix: 0,
      scale: [1, 1, 1],
      rotation: [0, 0, 0],
      position: [0, 0, 0],
    };
  },

  to: function (vector) {
    var aspect = this._uniforms.polarAspect,
        focus = this._uniforms.polarFocus,
        alpha = this._uniforms.polarAlpha,
        fold = this._uniforms.polarFold,
        power = this._uniforms.polarPower,
        helix = this._uniforms.polarHelix;

    // Polar power and fold
    vector.x *= fold;
    vector.y = Math.sign(vector.y) * Math.pow(Math.abs(vector.y), power);

    // Cartesian to polar
    if (alpha > 0.0001) {
      var radius = focus + vector.y * aspect,
          x = vector.x * alpha;

      // Separate folds of complex plane into helix
      vector.z += vector.x * helix * alpha;

      // Apply polar warp
      vector.x = Math.sin(x) * radius;
      vector.y = (Math.cos(x) * radius - focus) / aspect;
    }

    // Apply viewport
    this.transform.multiplyVector3(vector);
  },

  from: function (vector) {
    var aspect = this._uniforms.polarAspect,
        focus = this._uniforms.polarFocus,
        alpha = this._uniforms.polarAlpha,
        fold = this._uniforms.polarFold,
        power = this._uniforms.polarPower,
        helix = this._uniforms.polarHelix;

    // Apply inverse viewport
    this.inverse.multiplyVector3(vector);

    // Polar to cartesian
    if (alpha > 0.0001) {
      var x = vector.x,
          y = vector.y * aspect + focus;

      // Undo polar warp
      var radius = Math.sqrt(x*x + y*y);
          theta = Math.atan2(x, y);

      vector.x = theta / alpha;
      vector.y = (radius - focus) / aspect;

      // Merge separated folds of complex plane flat
      vector.z -= vector.x * helix * alpha;
    }

    // Inverse polar power and fold
    vector.x /= fold;
    vector.y = Math.sign(vector.y) * Math.pow(Math.abs(vector.y), 1 / power);
  },

  axis: function (axis) {
    var range = this.super.axis.call(this, axis);
        min = range[0],
        max = range[1],
        alpha = this._uniforms.polarAlpha,
        aspect = this._uniforms.polarAspect,
        focus = this._uniforms.polarFocus;

    // Correct Y extents during polar warp.
    if (axis == 1 && (alpha > 0)) {
      max = Math.max(Math.abs(max), Math.abs(min));
      min = Math.max(-focus / aspect + .001, min);
    }
    return [min, max];
  },

  update: function (stage) {
    var options = this.get(),
        r = options.range,
        s = options.scale,
        alpha = options.polar,
        fold = options.fold,
        power = options.power,
        helix = options.helix,
        aspect = 1;

    var x = r[0][0],
        y = r[1][0],
        z = r[2][0],
        dx = r[0][1] - x,
        dy = r[1][1] - y,
        dz = r[2][1] - z,
        sx = s[0],
        sy = s[1],
        sz = s[2];

    // Watch for negative scales.
    var idx = dx > 0 ? 1 : -1;

    // Adjust viewport range for polar transform.
    // As the viewport goes polar, the X-range is interpolated to the Y-range instead,
    // creating a perfectly circular viewport.
    var ady = Math.abs(dy);
    var fdx = dx+(ady*idx-dx)*alpha;
    var sdx = fdx/sx, sdy = dy/sy;
    aspect = Math.abs(sdx/sdy);

    // Forward transform
    var transform = [
      2*sx/fdx, 0, 0, -(2*x+dx)*sx/dx,
      0, 2*sy/dy, 0, -(2*y+dy)*sy/dy,
      0, 0, 2*sz/dz, -(2*z+dz)*sz/dz,
      0, 0, 0, 1,
    ];

    // Backward transform
    var inverse = [
      fdx/(2*sx), 0, 0, (x+dx/2),
      0, dy/(2*sy), 0, (y+dy/2),
      0, 0, dz/(2*sz), (z+dz/2),
      0, 0, 0, 1,
    ];

    // Update uniform values
    this.transform.set.apply(this.transform, transform);
    this.inverse.set.apply(this.inverse, inverse);

    this._uniforms.polarAlpha = alpha;
    this._uniforms.polarAspect = aspect;
    this._uniforms.polarFold = fold;
    this._uniforms.polarPower = power;
    this._uniforms.polarFocus = (alpha > 0) ? 1/alpha - 1 : 0;
    this._uniforms.polarHelix = helix;

    MathBox.Viewport.prototype.update.call(this, stage);
  },

  shader: function (factory) {
    factory
      .snippet('polarPower')
      .snippet('cartesianToPolar')
      .snippet('mathToWorld');
  },

  // Attribute validators

  validatePolar: function (polar) {
    return Math.max(0, Math.min(1, +polar || 0));
  },

  validateFold: function (fold) {
    return +fold || 0;
  },

  validatePower: function (power) {
    return +power || 0;
  },

  validateHelix: function (helix) {
    return +helix || 0;
  },

});

MathBox.Attributes.mixin(MathBox.Viewport);

MathBox.Viewport.types.polar = MathBox.ViewportPolar;
/**
 * Projective viewport, i.e. with a 4x4 projective transform applied
 */
MathBox.ViewportProjective = function (options) {
  var _super = MathBox.ViewportCartesian;
  _super.call(this, options);
  this.super = _super.prototype;

  // Prepare uniforms
  _.extend(this._uniforms, {
    projectiveTransform: new THREE.Matrix4(),
    projectiveInverse: new THREE.Matrix4(),
  });
};

MathBox.ViewportProjective.prototype = _.extend(new MathBox.ViewportCartesian(null), {

  defaults: function () {
    return {
      type: 'projective',
      range: [[-1, 1], [-1, 1], [-1, 1]],
      scale: [1, 1, 1],
      rotation: [0, 0, 0],
      position: [0, 0, 0],
      projective: [[1, 0, 0, 0],
                   [0, 1, 0, 0],
                   [0, 0, 1, 0],
                   [0, 0, 0, 1]],
    };
  },

  to: function (vector) {
    // Apply projective transform
    this._uniforms.projectiveTransform.multiplyVector3(vector);

    // Apply viewport
    this.transform.multiplyVector3(vector);
  },

  from: function (vector) {
    // Apply inverse viewport
    this.inverse.multiplyVector3(vector);

    // Apply inverse projective transform
    this._uniforms.projectiveInverse.multiplyVector3(vector);
  },

  update: function (stage) {
    var t = this._uniforms.projectiveTransform;
    var m = this.get('projective');
    t.set.apply(t, m[0].concat(m[1], m[2], m[3]));

    this._uniforms.projectiveInverse.getInverse(t);

    MathBox.ViewportCartesian.prototype.update.call(this, stage);
  },

  shader: function (factory) {
    factory
      .snippet('projectiveTransform')
      .snippet('mathToWorld');
  },

  // Attribute validators

  validateProjective: function (m) {
    if (m.constructor == Array) {
      for (var j = 0; j < 3; ++j) {
        m[j] = (m[j] && m.constructor == Array && m[j]) || [];
        m[j] = m[j].concat([0, 0, 0, 0]).slice(0, 4);
      }
      return m;
    }
  },

});

MathBox.Attributes.mixin(MathBox.Viewport);

MathBox.Viewport.types.projective = MathBox.ViewportProjective;
/**
 * Cartesian to spherical viewport transform.
 *
 * To animate the transition, the origin of the spherical coordinate grid (the focus) is moved
 * from infinity out to 0. In doing so, grid lines in the X/Y direction bend smoothly from
 * straight lines (circles of infinite radius) into circular arcs, while grid lines in the Z
 * direction transition from being parallel (meeting at infinity) to crossing at the origin.
 *
 * Like the polar viewport, aspect ratio correction is paramount to making this look good.
 * In the X/Z plane, the transform matches the Polar viewport transform.
 * In the Y direction, additional aspect ratio corrections are required.
 */
MathBox.ViewportSphere = function (options) {
  var _super = MathBox.ViewportCartesian;
  _super.call(this, options);
  this.super = _super.prototype;

  // Prepare uniforms
  _.extend(this._uniforms, {
    sphereAlpha:  0,
    sphereAspectX: 1,
    sphereAspectY: 1,
    sphereYScale: 1,
    sphereFocus:  1//,
  });
};

MathBox.ViewportSphere.prototype = _.extend(new MathBox.ViewportCartesian(null), {

  defaults: function () {
    return {
      type: 'sphere',
      range: [[-1, 1], [-1, 1], [-1, 1]],
      sphere: 1,
      scale: [1, 1, 1],
      rotation: [0, 0, 0],
      position: [0, 0, 0],
    };
  },

  to: function (vector) {
    var aspectX = this._uniforms.sphereAspectX,
        aspectY = this._uniforms.sphereAspectY,
        yScale = this._uniforms.sphereYScale,
        focus = this._uniforms.sphereFocus,
        alpha = this._uniforms.sphereAlpha;

    // Cartesian to spherical coords
    if (alpha > 0.0001) {
      var radius = focus + vector.z * aspectX,
          x = vector.x * alpha,
          y = vector.y * alpha / aspectY * yScale;

      var c = Math.cos(y) * radius;
      vector.x = Math.sin(x) * c;
      vector.y = Math.sin(y) * radius * aspectY;
      vector.z = (Math.cos(x) * c - focus) / aspectX;
    }

    // Apply viewport
    this.transform.multiplyVector3(vector);
  },

  from: function (vector) {
    var aspectX = this._uniforms.sphereAspectX,
        aspectY = this._uniforms.sphereAspectY,
        yScale = this._uniforms.sphereYScale,
        focus = this._uniforms.sphereFocus,
        alpha = this._uniforms.sphereAlpha;

    // Apply inverse viewport
    this.inverse.multiplyVector3(vector);

    // Spherical coords to cartesian
    if (alpha > 0.0001) {
      var x = vector.x,
          y = vector.y / aspectY,
          z = vector.z * aspectX + focus;

      var radius = Math.sqrt(x*x + y*y + z*z);
          theta = Math.atan2(y, Math.sqrt(x*x + y*y)),
          phi = Math.atan2(x, z);

      vector.x = theta / alpha;
      vector.y = phi / alpha * aspectY / yScale;
      vector.z = (radius - focus) / aspectX;
    }
  },

  axis: function (axis) {
    var range = this.super.axis.call(this, axis);
        min = range[0],
        max = range[1],
        alpha = this._uniforms.sphereAlpha,
        beta = this._uniforms.sphereBeta,
        aspectX = this._uniforms.sphereAspectX,
        aspectY = this._uniforms.sphereAspectY,
        focus = this._uniforms.sphereFocus;

    // Correct Z extents during sphere warp.
    if (axis == 2 && (alpha > 0)) {
      max = Math.max(Math.abs(max), Math.abs(min));
      min = Math.max(-focus / aspectX, min);
    }
    return [min, max];
  },

  update: function (stage) {
    var options = this.get(),
        r = options.range,
        s = options.scale,
        alpha = options.sphere,
        fold = options.fold,
        power = options.power,
        aspect = 1;

    // Focal point
    var focus = (alpha > 0) ? 1/alpha - 1 : 0;

    // Viewport extents
    var x = r[0][0],
        y = r[1][0],
        z = r[2][0],
        dx = r[0][1] - x,
        dy = r[1][1] - y,
        dz = r[2][1] - z,
        sx = s[0],
        sy = s[1],
        sz = s[2];

    // Watch for negative scales.
    var idx = dx > 0 ? 1 : -1;
    var idy = dy > 0 ? 1 : -1;

    // Adjust viewport for sphere.
    // As the viewport goes spherical, the X/Y-ranges are interpolated to the Z-range,
    // creating a perfectly spherical viewport.
    var adz = Math.abs(dz);
    var fdx = dx+(adz*idx-dx)*alpha;
    var fdy = dy+(adz*idy-dy)*alpha;
    var sdx = fdx/sx,
        sdy = fdy/sy,
        sdz = dz/sz;
    aspectX = sdx/sdz, // First fix X aspect to match Z
    aspectY = sdy/sdz/aspectX, // Then fix Y aspect

    // Scale Y coordinates before transforming, but cap at aspectY/alpha to prevent from poking through the poles mid-transform.
    aspectZ = dy/dx*sx/sy*2, // Factor of 2 due to the fact that in the Y direction we only go 180º from pole to pole.
    // This makes more sense if you look at how the vertex shader is implemented.
     yScale = Math.min(aspectY / alpha, 1 + (aspectZ - 1) * alpha);

    // Forward transform
    var transform = [
      2*sx/fdx, 0, 0, -(2*x+dx)*sx/dx,
      0, 2*sy/fdy, 0, -(2*y+dy)*sy/dy,
      0, 0, 2*sz/dz, -(2*z+dz)*sz/dz,
      0, 0, 0, 1,
    ];

    // Backward transform
    var inverse = [
      fdx/(2*sx), 0, 0, (x+dx/2),
      0, fdy/(2*sy), 0, (y+dy/2),
      0, 0, dz/(2*sz), (z+dz/2),
      0, 0, 0, 1,
    ];

    // Update uniform values
    this.transform.set.apply(this.transform, transform);
    this.inverse.set.apply(this.inverse, inverse);

    this._uniforms.sphereAlpha = alpha;
    this._uniforms.sphereAspectX = aspectX;
    this._uniforms.sphereAspectY = aspectY;
    this._uniforms.sphereYScale = yScale;
    this._uniforms.sphereFocus = focus;

    MathBox.Viewport.prototype.update.call(this, stage);
  },

  shader: function (factory) {
    factory
      .snippet('cartesianToSphere')
      .snippet('mathToWorld');
  },

  // Attribute validators

  validateSphere: function (sphere) {
    return Math.max(0, Math.min(1, +sphere || 0));
  }//,

});

MathBox.Attributes.mixin(MathBox.Viewport);

MathBox.Viewport.types.sphere = MathBox.ViewportSphere;


(function(){
  var mod = angular.module('mathBox', [])
  function guid() {
    function s4() {
      return Math.floor((1 + Math.random()) * 0x10000)
                 .toString(16)
                 .substring(1);
    }
    return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
           s4() + '-' + s4() + s4() + s4();
  }
  var mathReady = (function mathReady(){
    var ready = false;
    var waiting = [];
    angular.element(document).ready(function() {
      ThreeBox.preload([
        'snippets.glsl.html',
      ], function(){
        ready = true;
        waiting.forEach(function(cb){
          cb();
        })
      });
    });
    return function on(cb){
      ready?cb():waiting.push(cb);
    }
  }());

  mod.directive('mathBox', function(){
    return {
      restrict: 'E',
      transclude: true,
      scope: {},
      template: '<div class="mathbox" ng-transclude></div>',
      link: function(scope, elem, attrs){
        mathReady(function(){
          linkMathBox(scope, elem, attrs);
          console.log(1, scope);
          scope.ready();
        })
      },
      controller: function($scope){
        var waiting = [];
        var ready = false;
        $scope.ready = function(){
          ready = true;
          waiting.forEach(function(cb){
            cb($scope.mathbox());
          })
        }
        this.ready = function(cb){
          ready?cb():waiting.push(cb);
        };
      },
    }
  })

  mod.directive('curve', function(){
    return {
      restrict: 'E',
      require: '^mathBox',
      link: function(scope, elem, attrs, mathBoxCtrl){
        mathBoxCtrl.ready(function(mathbox){
          linkCurve(scope, elem, attrs, mathBoxCtrl, mathbox)
        });
      }
    }
  })

  mod.directive('vector', function(){
    return {
      restrict: 'E',
      require: '^mathBox',
      link: function(scope, elem, attrs, ctrl){
        ctrl.ready(function(mb){
          linkVector(scope, elem, attrs, ctrl, mb);
        })
      }
    }
  })

  function linkMathBox(scope, elem, attrs){
    var mathbox = mathBox(elem, {
      cursor:         true,
      elementResize:  true,
      fullscreen:     true,
      screenshot:     true,
      stats:          false,
      scale:          1,
    }).start();

    mathbox
      .viewport({
        type: 'cartesian',
        range: [[-10, 10], [-10, 10]],
        scale: [1, 1],
      })
      .axis({
        id: 'x',
        axis: 0,
        color: 0xa0a0a0,
        ticks: 5,
        lineWidth: 2,
        size: .05,
        labels: true,
      })
      .axis({
        id: 'y',
        axis: 1,
        color: 0xa0a0a0,
        ticks: 5,
        lineWidth: 2,
        size: .05,
        zero: false,
        labels: true,
      })
      .camera({
        orbit: 3,
        phi: τ/4,
        theta: 0,
        //lookAt: [0, 0],
      })
      .transition(300)

    scope.mathbox = function(){
      return mathbox;
    }
  }

  function linkCurve(scope, elem, attrs, ctrl, mathbox){
    var id = guid()
    var curve = mathbox.curve({
      id: id,
      domain: [-5, 5],
      expression: function(x){return x-1},
    });
    function attr(name, bind, prop, fn){
      var obj = {}
      fn = fn || function(v){return v}
      if(attrs[name]){
        obj[name] = fn(attrs[name]);
        console.log('o', obj)
        mathbox.animate('#'+id, obj, {
          duration: 1000,
        })
      }
      if(attrs[bind]){
        obj[name] = attr[bind];
        scope.$watch(attr[bind], function(v){
          obj[name] = fn(v);
          mathbox.animate('#'+id, obj, {
            duration: 1000,
          })
        })
      }
    }
    attr('color', 'ngColor', 'color', function(v){
      console.log(v)
      return Number('0x'+(attrs.color||'000000'))
    });
    attr('n', 'ngN', 'n', function(v){
      return Number(v)||200
    })
    attr('expression', 'ngExpression', function(v){
      return math.eval("f(x, i)=re("+(v||'x')+')')
    })
    /*mathbox.curve({
      id: attrs.id||'f',
      domain: [-5, 5],
      line: attrs.line==undefined?true:attrs.line==='true',
      points: attrs.points==undefined?false:attrs.points==='true',
      lineWidth: attrs.lineWidth||2,
      pointSize: attrs.pointSize||5,
      zIndex: attrs.zIndex||0,
      opacity: attrs.opacity||1,
      expression: math.eval("F(x, i)=re("+(elem.text()||'x')+')'),
    })*/
  }

  function linkVector(scope, elem, attrs, ctrl, mathbox){
    mathbox.vector({
      n: 1,
      data: [[attrs.x0, attrs.y0], [attrs.x1, attrs.y1]],
      expression: elem.text()?math.eval("F(i, end)=re("+(elem.text())+')'):undefined,
      line: attrs.line||true,
      arrow: attrs.arrow||true,
      size: attrs.size||0.3,
    })
  }
}())
;

/**
 * math.js
 * https://github.com/josdejong/mathjs
 *
 * Math.js is an extensive math library for JavaScript and Node.js,
 * It features real and complex numbers, units, matrices, a large set of
 * mathematical functions, and a flexible expression parser.
 *
 * @version 0.20.0
 * @date    2014-04-16
 *
 * @license
 * Copyright (C) 2013-2014 Jos de Jong <wjosdejong@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy
 * of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
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i(Math.log(Math.sqrt(r.re*r.re+r.im*r.im))/Math.LN10,Math.atan2(r.im,r.re)/Math.LN10);if(f(r))return o.deepMap(r,c);if(s(r))return c(+r);throw new e.error.UnsupportedTypeError("log10",e["typeof"](r))}}},function(e,r,t){e.exports=function(e){function r(e,r){if(r>0)return e>0?e%r:0==e?0:e-r*Math.floor(e/r);if(0==r)return e;throw new Error("Cannot calculate mod for a negative divisor")}var n=t(117),i=e.type.BigNumber,o=t(11),a=n.number.isNumber,s=n["boolean"].isBoolean,u=o.isCollection;e.mod=function f(t,n){if(2!=arguments.length)throw new e.error.ArgumentsError("mod",arguments.length,2);if(a(t)&&a(n))return r(t,n);if(t instanceof i)return a(n)?n=i.convert(n):s(n)&&(n=new i(n?1:0)),n instanceof i?n.isZero()?t:t.mod(n):f(t.toNumber(),n);if(n instanceof i)return a(t)?t=i.convert(t):s(t)&&(t=new i(t?1:0)),t instanceof i?n.isZero()?t:t.mod(n):f(t,n.toNumber());if(u(t)||u(n))return o.deepMap2(t,n,f);if(s(t))return f(+t,n);if(s(n))return f(t,+n);throw new 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n=t(117),i=e.type.BigNumber,o=t(5),a=t(9),s=t(11),u=n.number.isNumber,f=n.number.nearlyEqual,c=n["boolean"].isBoolean,l=n.string.isString,p=o.isComplex,m=a.isUnit,h=s.isCollection;e.smallereq=function g(t,n){if(2!=arguments.length)throw new e.error.ArgumentsError("smallereq",arguments.length,2);if(u(t)&&u(n))return f(t,n,r.epsilon)||n>t;if(t instanceof i)return u(n)?n=i.convert(n):c(n)&&(n=new i(n?1:0)),n instanceof i?t.lte(n):g(t.toNumber(),n);if(n instanceof i)return u(t)?t=i.convert(t):c(t)&&(t=new i(t?1:0)),t instanceof i?t.lte(n):g(t,n.toNumber());if(m(t)&&m(n)){if(!t.equalBase(n))throw new Error("Cannot compare units with different base");return t.value<=n.value}if(h(t)||h(n))return s.deepMap2(t,n,g);if(l(t)||l(n))return n>=t;if(c(t))return g(+t,n);if(c(n))return g(t,+n);if(p(t)||p(n))throw new TypeError("No ordering relation is defined for complex numbers");throw new 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//# sourceMappingURL=math.map;

/*
 * Author   : Martin Donk
 * Website  : http://www.nerdamer.com
 * Email    : martin.r.donk@gmail.com
 * License  : http://opensource.org/licenses/LGPL-3.0
 * Source   : https://github.com/jiggzson/nerdamer
 */

var nerdamer = (function( externalMods ) {

    "use strict";

    var G = {},
        Calculus    = G.Calculus   = {},
        Algebra     = G.Algebra    = {},
        Formatting  = G.Formatting = {},

        EQNS        = [],
        NUMER       = false,
        RESERVED    = [],
        C           = {},
        version     = '0.4.8',

    /*
     * The groups that help with organizing during parsing. Note that for FN is still a function even
     * if raised to a symbol of group S.
     * It should be noted that for the sake of simplicity both expression and symbol use the same class.
     * The expressions are basically any other group which is not of group N or group S
     */
        N   = C.N  = 1, // A number
        S   = C.S  = 2, // A single variable e.g. x
        FN  = C.FN = 3, // A function
        PL  = C.PL = 4, // A symbol/expression having same name with different powers e.g. 1/x + x^2
        CB  = C.CB = 5, // A symbol/expression composed of one or more variables through multiplication e.g. x*y
        CP  = C.CP = 6, // A symbol/expression composed of one variable and any other symbol or number x+1 or x+y
        EX  = C.EX = 7; // A symbol/expression with an exponent that is not a number e.g. x^y

    init();

    var operators = {
        ',': {order: 0, fn: null},
        '+': {order: 1, fn: 'add'},
        '-': {order: 2, fn: 'subtract'},
        '*': {order: 3, fn: 'multiply'},
        '/': {order: 4, fn: 'divide'},
        '^': {order: 5, fn: 'pow'}
    },

    // Supported functions.
    // Format: function_name: [mapped_function, number_of_parameters]
    functions = {
        'parens'    : [ , 1],
        'cos'       : [ , 1],
        'sin'       : [ , 1],
        'tan'       : [ , 1],
        'sec'       : [ , 1],
        'csc'       : [ , 1],
        'cot'       : [ , 1],
        'acos'      : [ , 1],
        'asin'      : [ , 1],
        'atan'      : [ , 1],
        'exp'       : [ , 1],
        'log'       : [log , 1],
        'abs'       : [abs , 1],
        'sqrt'      : [sqrt, 1],
        'diff'      : [Calculus.diff       , 2],
        'integrate' : [Calculus.integrate  , 2],
        'expand'    : [Algebra.expand, 1],
        'sum'       : [Calculus.sum,   4],
        'findRoot'  : [Algebra.findRoot,  2] //untested
    },

    Math2 = {
        'sec': { fn: function( x ) { return 1/Math.cos( x );}, inv: 'cos' },
        'cot': { fn: function( x ) { return 1/Math.tan( x );}, inv: 'tan' },
        'csc': { fn: function( x ) { return 1/Math.sin( x );}, inv: 'sin' }
    },

    // Define any and all constants here.
    constants = {
        'PI': Math.PI,
        'E' : Math.E
    };


    // Load reserved names into RESERVED
    loadReserved();

    // An attempt to get objects to behave somewhat as symbols.
    // Previously an attempt was made to try and separate Symbols from Expressions. For the sake of simplicity,
    // let's just assume that they're interchangeable and all symbols of a group higher than S are "Expressions".
    function Symbol( value ) {
        if( !( this instanceof Symbol ) ) {
            return new Symbol( value );
        }
        if( !isNaN( value ) ) {
            this.group = N;
            this.value = '_';
            this.multiplier = Number( value );
        }
        else {
            //imaginary values.
            if( value === 'i' ) {
                this.isImaginary = true;
            }
            this.group = S;
            validateName( value );
            this.value = value;
            this.multiplier = 1;
            this.power = 1;
        }
        // Added to silence the strict warning.
        return this;
    }
    Symbol.prototype = {
        // This method depends on text in cases where it is important to retain the multiplier.
        // e.g. 2(x+1) and (x+1) the same but the same does not hold true for a function like cos(x) and cos(2x).
        name: function( baseOnly ) {
            var v, g = this.group, symbol, pw;
            if( g === CB || g === CP || g === PL && this.power !== 1 ) {
                //the delimiter for joining back the name. Any character excluded from variable names will do really.
                var d = g === CB ? '*' : '+',
                    names = [];
                for( symbol in this.symbols ) {
                    var t = text( this.symbols[symbol] );
                    names.push( this.symbols[symbol].group === CP ? inBrackets( t ) : t );
                }
                v = inBrackets( names.sort().join(d) );
                if( g === CP && this.power !== 1 ) {
                    v = v+ ( baseOnly ? '' : '^('+this.power+')' );
                }
            }
            else if( g === PL ) {
                for( pw in this.symbols ) {
                    v = this.symbols[pw].value;
                    break;
                }
            }
            else if( g === FN ) {
                v = this.value+inBrackets( text(this.symbols) )+( this.power === 1 ? '' : baseOnly ? '' : '^('+this.power+')' );
            }
            else {
                v = this.value;
            }
            return v;
        },
        isNumber: function() {
            return this.group === N;
        },
        isPoly: function() {
            var status = false;
            if( this.group === S && this.power > 0 ) {
                status = true;
            }
            else {
                var k = keys( this.symbols ).sort(),
                    kl = k.length;
                 //the following assumptions are made in the next check
                 //1. numbers are represented by an underscore
                 //2. variable and function names must start with a letter
                if( kl === 2 && k[0] === '_' ) {
                    status = this.symbols[k[1]].isPoly();
                }
                else if( this.group === PL ) {
                    status = true;
                    for( var i=0; i<kl; i++ ) {
                        if( k[i] < 0 ) { status = false; }
                    }
                }
            }
            return status;
        },
        // Copies over a predefined list of properties from one symbol to another.
        copy: function() {
            var copy = new Symbol(0),
                //list of properties excluding power as this may be a symbol and would also need to be a copy.
                properties = [ 'multiplier','value','group', 'length','isImaginary' ],
                l = properties.length, i;

            if( this.symbols ) {
                copy.symbols = {};
                for( var x in this.symbols ) {
                    copy.symbols[x] = this.symbols[x].copy();
                }
            }

            for( i = 0; i < l; i++ ) {
                if( this[properties[i]] !== undefined ) {
                    copy[properties[i]] = this[properties[i]];
                }
            }

            if( this.power ) {
                copy.power = isSymbol( this.power ) ? this.power.copy() : this.power;
            }
            return copy;
        },
        valueOf: function() {
            if( this.group === N ) {
                return this.multiplier;
            }
            else if( this.power === 0 ){
                return 1;
            }
            else if( this.multiplier === 0 ) {
                return 0;
            }
            else {
                return text( this );
            }
        },
        //an add-on helper function to help sniff out symbols in complex symbols
        //pass in true as second parameter to include exponentials
        hasVariable: function( variable, all ) {
            var g = this.group;
            if( g > S ) {
                if( g === EX ) {
                    //exit only if it does
                    if( this.power.hasVariable( variable, all )) { return true; }
                }
                for( var x in this.symbols ) {
                    if( this.symbols[x].hasVariable( variable, all ) ) {
                        return true;
                    }
                }
            }
            else {
                return this.value === variable;
            }
            return false;
        },
        negate: function() {
            this.multiplier *= -1;
            return this;
        },
        invert: function() {
            if( isSymbol( this.power ) ) {
                this.power.negate();
            }
            else {
                this.power *= -1;
            }
            return this;
        },
        text: function() {
            return text( this );
        },
        latex: function() {
            return Formatting.latex( this );
        },
        evaluate: function( subs ) {
            var self = this;
            return numBlock(function(){
                return text( Parser.parse( text( self ), subs ) );
            });
        }
    };

    // Returns a fractional approximation of a decimal
    var Fraction = {
        convert: function( value, opts ) {
            var frac;
            if( value === 0 ) {
                frac = [ 0, 1];
            }
            else {
                if( value < 1e-6 || value > 1e20) {
                    var qc = this.quickConversion( Number( value ) );
                    if( qc[1] <= 1e20 ) {
                        var abs = Math.abs( value );
                        var sign = value/abs;
                        frac = this.fullConversion( abs.toFixed( (qc[1]+'').length-1 ));
                        frac[0] = frac[0]*sign;
                    }
                    else {
                        frac = qc;
                    }
                }
                else {
                    frac = this.fullConversion( value );
                }
            }
            return frac;
        },
        // If the fraction is small or too large this gets called instead of
        // fullConversion
        quickConversion: function( dec ) {
            var x = (dec.toExponential()+'').split('e');
            var d = x[0].split('.')[1];// get the number of places after the decimal
            var l = d ? d.length : 0; // maybe the coefficient is an integer;
            return [ Math.pow(10,l)*x[0], Math.pow(10, Math.abs(x[1])+l)];
        },
        fullConversion: function( dec ) {
            //function returns a good approximation of a fraction
            //http://mathforum.org/library/drmath/view/61772.html
            //Decimal To Fraction Conversion - A Simpler Version
            //Dr Peterson
            var done = false;
            //you can adjust the epsilon to a larger number if you don't need very high precision
            var n1 = 0, d1 = 1, n2 = 1, d2 = 0, n = 0, q = dec, epsilon = 1e-13;
            while(!done) {
                n++;
                if( n > 10000 ){
                    done = true;
                }
                var a = parseInt(q);
                var num = n1 + a * n2;
                var den = d1 + a * d2;
                var e = (q - a);
                if( e < epsilon) {
                    done = true;
                }
                q = 1/e;
                n1 = n2; d1 = d2; n2 = num; d2 = den;
                if(Math.abs(num/den-dec) < epsilon || n > 30) {
                    done = true;
                }
            }
            return [num, den];
        }
    };

    var Parser = {
        tokenize: function( expStr ) {
            expStr = String( expStr );
            var dtim = '@$', //this can be any set of characters not allowed in variable and function names
                dplus = '@#';
            //bug fix: 3.23e-4 will get split into [3.23e,'-', 4]. To fix this I temporarily replace e- with a @#
            //this can be any delimiter not allowed in a variable name
            expStr = expStr.replace( /(\d+)(e\-)(\d+)/g,
                function(){
                    return arguments[1]+dplus+arguments[3];
                }).
            replace( /(\d+)(e\+)(\d+)/g,
                function(){
                    return arguments[1]+dtim+arguments[3];
                });

            //enable the omission of the multiplication sign
            /*expStr = expStr.replace(/([a-z\(\+\-\*\/])(\d+)([a-z])|^(\d+)([a-z])/gi,
                function( match, g1, g2, g3, g4, g5 ){
                    var r;
                    if( g4 !== undefined ) r = g4+'*'+g5;
                    else if( /[a-z]/.test( g1 ) ) r = g1+g2+g3;
                    else r = g1+g2+'*'+g3;
                    return r;
                });*/

            //normalize e.g. turn (x-2)(x+1) into (x-2)*(x+1) and clean out white space.
            expStr = String(expStr).split(' ').join('').replace( /\)\(/g, ')*(' );

            var openBrackets = 0,
                stack = [],
                depth = [],
                //variable for the last operator
                lastOperator = 0,
                //expression length
                el = expStr.length,
                brackets = {
                    '(': function() {

                        //a bracket signifies a new function and this needs it's own stack
                        stack.push( [] );

                        //we need to find our way back to upper stack so make a note of it
                        depth.push( stack );

                        //move to the new stack
                        stack = stack[stack.length - 1];

                        //open a new  bracket
                        openBrackets++;
                    },
                    ')': function() {

                        //move up one level on the stack
                        stack = depth.pop();

                        //close the bracket
                        openBrackets--;
                    }
                };
                var stackInsert = function( pos ) {
                    var e = expStr.substring( lastOperator, pos ),
                        curOperator = expStr.charAt( pos );
                    if(e) { stack.push( e.replace( new RegExp( dplus ),'e-').replace( new RegExp( dtim ),'e+') ); }

                    if(curOperator) {
                        stack.push( curOperator );
                    }
                };
            for( var i=0; i<el; i++ ){
                var c = expStr.charAt( i );
                if( operators[c] || brackets[c] ) {
                    stackInsert( i );
                    lastOperator = i+1;
                    if( brackets[c] ) {
                        stack.pop();
                        brackets[c]();
                    }
                }
            }
            stackInsert( expStr.length );
            if( openBrackets !== 0 ) throw new Error('Malformed expression!');
            return stack;
        },
        //this function grabs all between the commas
        loadParams: function( symbolArray ) {
            var l = symbolArray.length,
                curloc = 0,
                comma = ',',
                nparam = 1,
                paramArray = [],
                searching = true;
            while( searching ) {
                var token = symbolArray[curloc],
                    eos = curloc === l;
                //if we find a comma or we've reached the end of the array.
                if( token === comma || eos ) {
                    var t = symbolArray.splice( 0, curloc );
                    paramArray.push( nparam === 1 ? t : t.join('') );
                    symbolArray.shift();//remove the comma
                    curloc = 0;
                    nparam++; //walk up the parameter list
                }
                searching = !eos;
                curloc++;
            }

            //put the symbol back into the tokens array.
            symbolArray.unshift( paramArray.shift() );
            return paramArray;
        },
        parseFunction: function( fn, contents ) {
            var properties = functions[fn.value],
                fnMap = properties[0],
                params = contents.params || [],
                result;

            //the parameters don't have to be attached to the symbol anymore
            delete contents.params;

            if( !fnMap ) {
                result = math( fn, contents );
            }
            else {
                //make the contents the first parameter and call the function with the provided parameters.
                //temporary fix: until we can have function parameters wrapped inside of the parens function
                //without causing an infinite loop
                if( contents.length === 1 && contents.group === CP ) contents = firstObject( contents.symbols );

                params.unshift( contents );

                if( fnMap === map ) {
                    //Just call map which does nothing more than format the arguments and call Parser.parse
                    //with the arguments provided
                    result = map( properties[2], properties[3], params );
                }
                else {
                    result = fnMap.apply( undefined, params );
                }
            }
            return result;
        },
        //The function responsible for the actual parsing of the expression.
        parseTokens: function( tokensOrExpression, subs ) {
            var tokens = tokensOrExpression.tokens || tokensOrExpression,
                parsed = {},
                curPosition = 0,
                lastOrder = 0;
            while( curPosition <= tokens.length ){
                var token = tokens[curPosition],
                    endOfTokens = curPosition === tokens.length;
                // Support for functions
                if( token in functions ) {

                    token = this.fetchSymbol( tokens, subs, curPosition);

                    // Parse what's in between the brackets.
                    var contents = this.fetchSymbol( tokens, subs, curPosition, true );

                    insert( tokens ,this.parseFunction( token, contents ), curPosition );
                }
                if( operators[token] !== undefined || endOfTokens ) {

                    // An order of -1 insures that we have a lower order than anything else and forces processing
                    var order = endOfTokens ? -1 : operators[token].order;

                    if( order < lastOrder ) {

                        // Remove the whole prior section from the tokens as we now know that we're either at the end
                        // or a higher order operator [*,^,/]
                        var subTokens = tokens.splice( 0, curPosition ),

                            // Look ahead to the next operator after the subtokens to determine if we can place the last
                            // symbol into parsed or if we have to hang on to it for further multiplication after a '^'.*/
                            nextOperator = tokens[0];

                        //Parsing from this point on is pretty straight forward
                        while( subTokens.length > 0 ) {
                            var firstSymbol = this.fetchSymbol( subTokens, subs ),
                                curOperator = subTokens.pop();
                            if( curOperator === '-' ){
                                // To support subraction just negate the multiplier and reinsert for addition
                                firstSymbol.negate();
                                if( subTokens[0] ) subTokens.push( '+' );
                                subTokens.push( firstSymbol );
                            }
                            // Insert the token into parsed if the operator is + or if no operator was found meaning we
                            // only have one token left.
                            else if( curOperator === '+' || !curOperator ) {
                                if( nextOperator === '*' || nextOperator === '/' ){

                                    //At this point we've already seen that the next operator so clear the next operator for the next iteration.
                                    nextOperator = null;

                                    tokens.unshift( firstSymbol );
                                }
                                else {
                                    Parser.unpackSymbol( firstSymbol, parsed );
                                }
                            }
                            else {
                                var secondSymbol = this.fetchSymbol( subTokens, subs ),
                                    opr = operators[curOperator];
                                if( !opr || !opr.fn ) throw new Error( curOperator + ' is not a supported function!')
                                subTokens.push( this[opr.fn]( firstSymbol, secondSymbol ) );
                            }
                        }

                        if( order > 0 ) {
                            // Go back to the beginning and let's start parsing again. A better point may be chosen and may lead to better
                            // performance but I'll investigate that later.
                            curPosition = 0;
                        }
                    }
                    lastOrder = order;
                }
                curPosition++;
            }
            // Place a zero in the object if it's empty e.g. 1-1 will result in a empty object
            if( keys( parsed ).length === 0 ) parsed._ = Symbol(0);
            return parsed;
        },
        // A function to safely fetch a token out of the token array. This will read a sub-array into a symbol during parsing.
        fetchSymbol: function( tokens, subs, index, isFunction ) {
            // pop out the token
            var sym = index >= 0 ? remove( tokens, index ) : tokens.pop(), paramArray;

            if( isSymbol( sym )) return sym;

            //fish out the parameters that were passed in
            if(isFunction){
                paramArray = this.loadParams( sym );
            }

            if( isArray( sym ) ) {
                //pack it and ship it
                sym = this.packSymbol( this.parseTokens( sym, subs ), '', isFunction );
            }
            else {
                //subsitute the value for a known value.
                if( subs && subs[sym] !== undefined && !isReserved( sym ) ) {
                    sym = Parser.parse( subs[sym] );
                }
                else if( constants[sym] !== undefined && NUMER ) {
                    sym = Parser.parse( constants[sym] );
                }
                else {
                    sym = Symbol( sym );
                }
            }

            if( paramArray && paramArray.length > 0 ) sym.params = paramArray;
            return sym;
        },
        // Transfer over a symbol when changing a combination to another symbol. e.g. a composition that contains a composition
        transfer: function( second, first ) {
            first.multiplier *= second.multiplier;
            this.powMultiply( first, second ); //TODO: have the value check if it's dealing with a number and more as well;
            first.value = second.value;
            first.group = second.group;
            if( second.symbols ) {
                first.symbols = second.symbols;
                first.length = second.length;
            }
            else {
                delete first.symbols;
                delete first.length;
            }
        },

        // This method neatly reorganizes all the tokens into an object and is the heart of the parser.
        // If a symbol is found they are added together. It also does some book keeping on higher group Symbols.
        addSymbol: function( symbol, item, parent, multiply ) {
            var obj,
                parentGroup = parent ? parent.group : null,
            // If the function is being multiplied then this forces the power to be ignored.
            baseOnly = symbol.group === FN && multiply || parentGroup === CB && symbol.group === FN;

            if( isSymbol( item ) ) {
                obj = item.symbols;
            }
            else {
                obj = item;
            }

            if( +symbol.power === 0 ) { symbol = Symbol( symbol.multiplier ); }

            // Symbols of group PL are stored by their power so verify and use the power value as the key.
            var name = ( parent ? parent.group === PL: false ) ? ( isSymbol( symbol.power ) ?
                text( symbol.power ) : symbol.power ) : symbol.name( baseOnly );
            if( !obj[name] ) {

                // Some bookkeeping for the function
                if( parent ) {
                    if( parent.group === CB ) {
                        parent.multiplier *= symbol.multiplier;
                        symbol.multiplier = 1;
                    }
                    !parent.length ? parent.length = 1 : parent.length++;
                }
                // If the symbol is zero why even bother adding it.
                if( symbol.multiplier !== 0 ) obj[name] = symbol;
            }
            else {
                obj[name] = multiply ? this.multiply( obj[name], symbol ) : this.add( obj[name], symbol );

                if( obj[name].multiplier === 0 ) {
                    delete obj[name];
                    if( parent ) parent.length--;
                }
                if( multiply && obj[name].group === N ) {
                    item = this.multiply( remove( obj, name ), parent );

                    parent.length--;

                    if( parent.length === 1 ) {
                        this.transfer( firstObject( obj ), parent );
                    }
                }

                if( parent && parent.group === CB ) {

                    // We know the multiplier is 1 because it has already been transferred earlier
                    if( +obj[name] === 1 ) {
                        delete obj[name];
                        parent.length--;
                    }
                    if( parent.length === 1 ) {
                        // Transform the symbol into the parent symbol.
                        this.transfer( firstObject( obj ), parent );
                    }
                }
            }

            return obj;
        },
        add: function( a, b) {

            if( !isSymbol(a) ) a = Symbol(a); //this enables us to pass in numbers which is useful for exponentials
            if( !isSymbol(b) ) b = Symbol(b);

            var g1 = a.group, g2 = b.group;
            var p1 = ''+a.power, p2 = ''+b.power;
            if( g1 === CB && g2 === PL ||
                g1 === S && g2 === PL ) return this.add( b, a );
            // Note: the add function doesn't get called directly while parsing
            // First let's make sure we're not dealing with a symbol of group PL
            if( g1 === PL && p1 === '1' ) {
                var m = a.multiplier, x;
                // Move the value of the multiplier down to avoid problems later on
                if( m !== 1 ) {
                    for( x in a.symbols ) {
                        a.symbols[x].multiplier *= a.multiplier;
                    }
                    a.multiplier = 1;
                }
                if( g2 === PL && p2 === '1') {
                    for( x in b.symbols ) {
                        this.addSymbol( b.symbols[x], a.symbols, a );
                    }
                }
                else {
                    this.addSymbol( b, a.symbols, a );
                }
            }
            else if( a.value === b.value && p1 === p2 ){
                a.multiplier += b.multiplier;
            }
            else {
                a = this.convertAndInsert( a, b, PL );
            }

            return a;
        },
        // NOTE: This is method should never actually be called but is there just in case something was overlooked
        subtract: function( a, b ) {
            b.negate();
            return this.add( a, b );
        },
        multiply: function( a, b ) {
            // Take care of imaginary numbers
            if( a.isImaginary && b.isImaginary ) return Symbol( -1*a.multiplier*b.multiplier );

            var g1 = a.group,
                g2 = b.group,
                p1 = a.power,
                p2 = b.power,
                n1 = g1 === FN ? a.name( true ) : null,
                n2 = g2 === FN ? b.name( true ) : null;
            // Quick returns
            if( p1 === 0 ) { a = Symbol( a.multiplier ); }
            if( p2 === 0 ) { b = Symbol( a.multiplier ); }
            if( a.multiplier === 0 || b.multiplier === 0 ) { return Symbol( 0 );}

            // Always have the lower group on the right for easy comparison.
            if( g2 > g1 ) { return this.multiply( b, a); }

            var isCompositeA = ( g1 === PL || g1 === CP ),
                isCompositeB = ( g2 === PL || g2 === CP ),
                t, x;

            // For all symbols the multipliers have to be multiplied.
            a.multiplier *= b.multiplier;

            // Exit early if it's a number.
            if( g2 === N ) { return a; }

            // We have already grabbed the value of the multiplier so we have to
            // now set it to 1. e.g 2 * (2*x) = 4 * (1*x).
            b.multiplier = 1;

            var isEqual = a.value === b.value;

            if( isEqual && g2 !== N && g1 !== PL &&
                !( g1 === EX && g2 === PL ) && n1 === n2 ) {
                this.powAdd( a, b );

                // This is needed if during multiplication one of the symbols
                // in a combination results in a zero power.
                if( +a.power === 0 ) {
                    return Symbol( a.multiplier );
                }
            }
            else if( isCompositeA && p1 === 1 || isCompositeB && p2 === 1 ) {

                // The multiply method always puts the lower group symbol to the right but sometimes,
                // such as in the case of group PL or CB, we need it back on the right.
                // The following tests for these cases.
                if( g1 === CB && g2 === PL || g1 === FN && g2 === CP ||
                    g1 === EX && g2 === PL || g1 === EX && g2 === CP ||
                    isCompositeB && isCompositeA && p1 !== 1  ) {
                    // Swap symbols
                    t = a; a = b; b = t;
                    // Swap powers
                    t = p1; p1 = p2; p2 = t;
                }
                if( !isEqual && a.group === PL || p1 !== p2 ) {
                    a.group = CP;
                }

                t = {};
                a.length = 0;
                for( x in a.symbols ) {
                    var r = this.multiply( a.symbols[x], b.copy() );
                    var m = r.multiplier;
                    if( b.group === PL && p2 === 1 || b.group === CP && p2 === 1 ) {
                        for( var xx in r.symbols ) {

                            if( m!== 1 ) r.symbols[xx].multiplier *= m;

                            //The last operation may have resulted in a number being returned
                            this.addSymbol( r.symbols[xx], t, a );
                        }
                        r.multiplier = 1;
                    }
                    else {
                        this.addSymbol( r, t, a );
                    }
                }
                   a.symbols = t;
            }
            else if( g1 === CB && g2 !== N && g2 !== PL ) {

                if( g2 === CB && p2 === 1 ) {
                    for( x in b.symbols ) {

                        // We're going to be multiplying 2 symbols of group CB but in the process one may have been
                        // transformed to a simpler symbol. Because of this we have to check that it still has a symbols
                        // object.
                        if( !a.symbols ) {
                            a = Parser.multiply( b.symbols[x], a );
                        }
                        else {
                            this.powDivide( b.symbols[x], a );
                            this.addSymbol( b.symbols[x], a, a, true );
                        }
                    }
                }
                else {
                    // Under investigation: if your having problems with incorrect exponentials you may want to check
                    // here first
                    this.powDivide( b, a );
                    this.addSymbol( b, a, a, true );

                }

                // Update the name but only if it's a function
                if( a.group !== FN ) a.value = a.name();
            }
            else if( g2 !== N ){
                if( g1 === EX && g2 === CB && b.hasVariable( a.name(true) ) ) {
                    this.addSymbol( a, b, undefined, true );
                    a = b;
                }
                else {
                    a = this.convertAndInsert( a, b, CB );
                }
            }

            return a;
        },
        divide: function( b, a ) {
            if( b.multiplier === 0 ) throw new Error('Division by zero!')
            b.multiplier = 1/b.multiplier;
            if( b.group > N ) {
                b.invert();
            }
            return this.multiply( a, b );
        },
        pow: function( b, a ) {
            if( +b === 1 ) return a;// x^1 = x;
            var g1 = a.group, g2 = b.group;

            // If the radical is even we must retain its absolute value.
            // this checks to see if the radical is divisible by two
            var isEven = +b % 2 === 0 || 1/( +b - parseInt( +b ) ) % 2 === 0,
                // Record if we have a negative number as the base.
                isNegative = a.multiplier < 0,
                // Make sure that the power is even.
                powEven =  a.power % 2 === 0;

            if( a.isImaginary ) {
                if( g2 === N && b.multiplier % 2 === 0 ) {
                    return Symbol( -Math.pow( a.multiplier, +b ));
                }
            }

            if( g1 === N && g2 === N ) {
                var fracpart = Math.abs( b.multiplier - parseInt( b.multiplier ) ),
                    isRadical =  fracpart < 1 && fracpart > 0;

                if( isRadical && isNegative ) { a.negate(); }

                // Support for negative/imaginary numbers when dealing with radicals
                a.multiplier = Math.pow( a.multiplier, b.multiplier );
                if( isNegative && isRadical && isEven ) {
                    a = Parser.multiply( a, Symbol( 'i' ) );
                }
                else if( isRadical && isNegative ){
                    a.negate();
                }
                return a;//early exit.
            }
            else {
                if( isNegative ) { a.negate(); }
                var p = a.power;
                if( g2 === N && !isSymbol( p ) ) {
                    if( isNegative && isEven ) { //TBD
                        var m = a.multiplier;

                        if( g1 === S ) {
                            a.multiplier += b.multiplier;
                        }
                        else {
                            a.multiplier = -1;
                            a = parens( a );
                        }
                    }
                    else {
                        m = a.multiplier;
                    }

                    a.multiplier = Math.pow( m, b.multiplier );
                    a.power *= b.multiplier;
                }
                else {
                    // The symbols is now of group EX
                    if( g1 !== FN ) {
                        // But first some upgrades to the humble group N symbol
                        if( g1 === N ) {
                            a.value = a.multiplier;
                            a.multiplier = 1;
                            p = 1;
                        }
                        // It will become impossible to distinguish between a group CP and a CB symbol once the
                        // the group is changed by looking at the objects structure so we make note.
                        if( g1 !== EX ) { a.origin = g1; }

                        a.group = EX;

                    }

                    // Make sure that you're sending in a symbol for multiplication
                    if( !isSymbol( p ) ){ p = Symbol( p ); }
                    a.power = this.multiply( p , b );

                    // No need leave the power anymore complex than it needs to be.
                    if( a.power.group === N ) { a.power = a.power.multiplier; }
                }
            }
            // If the symbol went down from a symbol of group EX, restore.
            if( a.power === 1 && a.origin ) {
                if( a.origin === N ) {
                    a = Symbol( a.multiplier*a.value );
                }
                else {
                    a.group = a.origin;
                }
            }
            // Verify that the symbol is a candidate to have its absolute value retained
            if( isEven && powEven && parseInt( a.power + 1 ) % 2 === 0 ) a = abs( a );

            // Put back the sign
            if( isNegative && !isEven ) a.negate();
            return a;
        },
        // A method to pack intermediate results into a symbol or just return the symbol.
        // e.g. calculations done on an expression between brackets
        packSymbol: function( obj, group, donotunpack ) {
            group = group || CP;
            var k = keys( obj ),
                l = k.length,
                isCompounded = false;
            // Bug fix: cos((1+x)^2)^2 would return cos(1+x)^4
            // TODO: this should use parens instead. At present it results in an infinite loop.
            if( donotunpack ) {
                isCompounded = obj[k[0]].group === CP;
            }

            if( l === 0 ) {
                return Symbol(0);
            }
            // NUMER takes higher precedence and can force a number to be returned
            else if( l === 1 && ( NUMER || !isCompounded ) ) {
                return obj[k[0]];
            }
            else {
                var n = new Symbol();
                n.group = group;

                n.symbols = obj;
                n.length = l;
                n.value = text( obj );
                return n;
            }
        },
        // This method provides a quick and dirty way to upgrade or downgrade a symbol
        convertAndInsert: function( symbol, symbol2,  group ) {
            var ns = Symbol(),
                // Lets addSymbol know to multiply instead of add the symbol if the parsed object
                // already has such a value.
                isCombo = group === CP;
            ns.group = group;
            if( group > S ) {
                ns.symbols = {};
                ns.length = 0;
                this.addSymbol( symbol, ns.symbols, ns, isCombo );
                this.addSymbol( symbol2, ns.symbols, ns, isCombo );
                ns.value = ns.name();
                symbol = ns;
            }
            else if( group <= S && symbol.group > S ) {
                delete symbol.symbols;
            }
            return symbol;
        },

        // Method unpacks a symbol of group CP into a parsed object.
        unpackSymbol: function( symbol, parsed, forceUnpack ) {

            if( symbol.power === 1 && symbol.group === CP || forceUnpack )  {
                for( var x in symbol.symbols ) {
                    symbol.symbols[x].multiplier *= symbol.multiplier;
                    this.addSymbol( symbol.symbols[x], parsed );
                }
            }
            else {
                this.addSymbol( symbol, parsed );
            }
        },
        // A quick and lazy way to get a fully built symbol if you don't want to are unable to transform an object.
        // this functions is sometimes needed but most of the time it's convenience but has the benefit of its parameter
        // being a string, so you can easily retrace the logic.
        parse: function( str, subs ) {
            return this.packSymbol( this.parseTokens( this.tokenize( str ), subs ) );
        },
        // The next functions are needed in case the exponential is a symbol
        powDivide: function( a, b ) {
            if( isSymbol( a.power ) || isSymbol( b.power )) {
                a.power = !isSymbol( a.power ) ? Symbol( a.power ) : a.power.copy();
                b.power = !isSymbol( b.power ) ? Symbol( b.power ) : b.power.copy();
                a.power = this.divide( b.power, a.power );
            }
            else {
                a.power /= b.power;
            }
        },
        powMultiply: function( a, b) {
            if( isSymbol( a.power ) || isSymbol( b.power )) {
                a.power = this.multiply( a.power, b.power );
            }
            else {
                a.power *= b.power;
            }
        },
        powAdd: function( a, b ) {
            if( isSymbol( a.power ) || isSymbol( b.power )) {
                a.power = this.add( a.power, b.power );
            }
            else {
                a.power += b.power;
            }
        }
    };
    // Removes an item from either an array or an object.
    // If an array the index must be specified after the array.
    // If an object the key must be specified
    function remove( obj, indexOrKey ) {
        var result;
        if( isArray( obj ) ) {
            result =  obj.splice( indexOrKey, 1 )[0];
        }
        else {
            result = obj[ indexOrKey ];
            delete obj[ indexOrKey ];
        }
        return result;
    }

    // Returns true if the obj is a symbol.
    function isSymbol( obj ) {
        return ( obj instanceof Symbol );
    }

    // Returns the keys of an object/associative array.
    function keys( obj ) {
        var k = [];
        for( var key in obj ) { k.push( key ); }
        return k;
    }

    // This recursive method attempts to return a parsed object or symbol back in text form.
    // When asFunction is set to true it will make sure to write in JS function form.
    function text( obj, delimiter, option, forceBracket ) {
        var asFunction = option === 'function',
            g = obj.group, v;
        delimiter = delimiter || '+';
        if( g === CB || obj.origin === CB ) delimiter = '*';
        // Base case
        if( obj instanceof Symbol ) {
            if( g === N ) {
                v = +obj.multiplier;
            }
            else {
                if( g === FN ) {
                    var params = '',
                    // Whenever we exporting the text to a javascript function we have to format the text differently.
                    // This should probably be its own function but for now we're using text.
                        value = obj.value;
                    v = asFunction ? ( value in Math2 ? '1/Math.'+Math2[value].inv : 'Math.'+value ): value;

                    // parens is just a function that holds the parentheses so we don't need the name
                    if( v === 'parens' ) v = '';

                    v = v + inBrackets( text( obj.symbols, undefined, option ) );

                    if(obj.value ==='sum' && obj.params ) v = v.substring(0, v.length-1)+','+obj.params.join(',')+')';
                }
                else if( g === PL || g === CP || g === CB || g === EX && obj.symbols ) {
                    v = text( obj.symbols, delimiter, option );
                    if( obj.multiplier !== 1 && g !== CB || obj.power !== 1 || forceBracket )  v = inBrackets( v );
                }
                else {
                    v = obj.value;
                }
                var m = obj.multiplier, p = obj.power;
                if( asFunction ) {
                    if( p !== 1 ) v = 'Math.pow'+inBrackets( v+','+( g === EX ? text( p, undefined, option) : p) );
                    if( m !== 1 ) v = m+'*'+v;
                }
                else {
                    m = m === 1 ? '' : m === -1 ? '-' : m+'*';
                    p = p === 1 ? '' : '^('+obj.power+')';
                    v = m+v+p;
                }
            }
        }
        else {
            var a= [], imgpart = '';
            for( var x in obj ) {
                var txt = text( obj[x], undefined, option );
                // Grab the imaginary part if it happens to be so and store it.
                if( obj[x].isImaginary ) {
                    imgpart = txt;
                }
                else {
                    a.push( txt );
                }
            }
            v = a.sort();

            // Reinsert imaginary part if there is one.
            if( imgpart ) { a.push( imgpart ); }

            v = a.join( delimiter ).replace(/\+\-/g,'-');
        }
        return v;
    }

    function loadMods(){
        for( var x in externalMods ) {

        }
    }

    function init(){

        // Load indexOf function if not present
        loadIndexOf();

        //load external mods
        loadMods();

        Calculus.sum = function( fn, variable, index, end ) {
            if( !isNaN( variable )) throw new Error('Incorrect parameter!');

            if( !isNaN( index ) && !isNaN( end ) ) {
                // Backup the current value for the variable.
                var lastc = '0', //last computation.
                    eq = text( fn ),
                    vars = variables( fn ),
                    k = {},
                    result, i;

                if( vars.length > 1 ) {
                    var t = {};
                    for( i=index; i<=end; i++ ) {
                        k[variable] = i;
                        Parser.addSymbol( Parser.parse( eq, k ), t );
                    }
                    result = Parser.packSymbol( t );
                }
                else {
                    numBlock( function() {
                        for( i=index; i<=end; i++) {
                            k[variable] = i;

                            //Append the last equation and then just reparse the whole thing
                            lastc = text(Parser.parse( (lastc+'+'+eq).replace(/\+\-/g,'-'), k ) );
                        }
                    });
                    result = Parser.parse( ''+lastc );
                }

                return result;
            }
            else {
                var s = Symbol('sum');
                    s.symbols = Parser.addSymbol( fn, {} );
                    s.group = FN;
                    s.params = [ variable, index, end ];
                return s;
            }
        };
        // Equivalent to "derivative of the outside".
        Calculus.diff = function( obj, d ) {
            if( isSymbol( d )) d = d.value;

            if( obj.group === FN ) {
                if( isSymbol( obj.power ) ) {
                    obj = Calculus.derive( obj, d );
                }
                else {
                    obj = Calculus.chainRule( obj, d );
                }
            }
            else {
                obj = Calculus.derive( obj, d );
            }

            return obj;
        };
        Calculus.polydiff = function( symbol, d ) {
            if( symbol.value === d || symbol.hasVariable( d, true )) {
                symbol.multiplier *= symbol.power;
                symbol.power -= 1;
                if( symbol.power === 0 ) {
                    symbol = Symbol( symbol.multiplier );
                }
            }
            return symbol;
        };
        Calculus.derive = function( symbol, d) {
            var g = symbol.group, t, a, b, cp;
            if( isSymbol( symbol ) ) {
                if( g === N || g === S && symbol.value !== d ) {
                    symbol = Symbol( 0 );
                }
                else if( g === S ) {
                    symbol = Calculus.polydiff( symbol, d );
                }
                else if( g === CB ) {
                    var m = symbol.multiplier;
                    symbol.multiplier = 1;
                    cp = symbol.copy();
                    a = Calculus.productRule( symbol, d );
                    b = Calculus.polydiff( cp, d );
                    var ans =  Parser.multiply( a, b );
                    ans.multiplier *= m;
                    return ans;
                }
                else if( g === FN && symbol.power === 1 ) {
                    // Table of known derivatives
                    switch( symbol.value ) {
                        case 'log':
                            cp = symbol.copy();
                            symbol = Parser.packSymbol( cp.symbols );

                            if( isSymbol( symbol.power ) ) {
                                symbol.power = Parser.multiply( symbol.power, Symbol(-1));
                            }
                            else {
                                symbol.power *= -1;
                            }
                            symbol.multiplier = cp.multiplier/symbol.multiplier;
                            break;
                        case 'cos':
                            symbol.value = 'sin';
                            symbol.multiplier *= -1;
                            break;
                        case 'sin':
                            symbol.value = 'cos';
                            break;
                        case 'tan':
                            symbol.value = 'sec';
                            symbol.power = 2;
                            break;
                        case 'sec':
                            // Use a copy if this gives errors
                            symbol = this.quickdiff( symbol, 'tan');
                            break;
                        case 'csc':
                            symbol = this.quickdiff( symbol, '-cot');
                            break;
                        case 'cot':
                            symbol.value = 'csc';
                            symbol.multiplier *= -1;
                            symbol.power = 2;
                            break;
                        case 'asin':
                            symbol = Parser.parse( '(sqrt(1-('+text(symbol.symbols)+')^2))^(-1)' );
                            break;
                        case 'acos':
                            symbol = Parser.parse( '-(sqrt(1-('+text(symbol.symbols)+')^2))^(-1)' );
                            break;
                        case 'atan':
                            symbol = Parser.parse( '(1+('+text(symbol.symbols)+')^2)^(-1)' );
                            break;
                        case 'abs':
                            symbol = Parser.parse(inBrackets(text(symbol.symbols))+'/'+text(symbol));
                            break;
                        case 'parens':
                            symbol = Symbol(1);
                            break;
                    }
                }
                else if( g === EX || g === FN && isSymbol( symbol.power ) ) {
                    var value;
                    if( g === EX ) {
                        value = symbol.value;
                    }
                    else if( g === FN && symbol.hasVariable( d )) {
                        value = symbol.value + inBrackets( text( symbol.symbols ) );
                    }
                    else {
                        //TODO: eliminate dependence on text.
                        value = symbol.value + inBrackets( text( symbol.symbols ) );
                    }
                        a = Parser.multiply( Parser.parse( 'log'+inBrackets( value ) ), symbol.power.copy() );
                        b = Calculus.diff( a, d );
                    symbol = Parser.multiply( symbol, b );
                }
                else if( g === FN && symbol.power !== 1 ) {
                    a = Calculus.polydiff( symbol.copy(), d );
                    b = symbol.copy();
                    b.power = 1;
                    b = Calculus.derive(b, d);
                    symbol = Parser.multiply( a, b );
                }
                else if( g === CP || g === PL ) {
                    a = Calculus.polydiff( symbol.copy(), d );
                    b = Calculus.diff( symbol.symbols, d );
                    symbol = Parser.multiply( a, b );
                }
            }
            else {
                t = {};
                var obj = symbol;
                for( var x in obj ) {
                    var u = Calculus.diff( obj[x].copy(), d );
                    Parser.addSymbol( u, t );
                }
                symbol = Parser.packSymbol( t );
            }

            return symbol;
        };

        Calculus.quickdiff = function( symbol, val, altVal ) {
            return Parser.multiply( symbol, Parser.parse( val+inBrackets( altVal || text( symbol.symbols ) ) ));
        };

        Calculus.chainRule = function( symbol, d ) {
            var a = Calculus.derive( symbol, d ),
                b = Calculus.derive( symbol.symbols, d );
            return Parser.multiply( a , b );
        };

        Calculus.productRule = function( symbol, d ) {
            var n = 0,//use this to keep track of how many derivatives you actually pulled
                stack = [],
                k = keys( symbol.symbols ),
                l = k.length,
                result = symbol;// the default return

            // A regular for loop is chosen to reduce the number of loops by pulling the keys and working with that;
            for( var i=0; i<l; i++ ) {
                var key = k[i],
                    df = Calculus.diff( symbol.symbols[key].copy(), d );
                if( +df !== 0 ) {
                    n++;
                    var ll = k.length;
                    for( var j=0; j<ll; j++ ) {
                        //we need to skip the current symbol
                        if( j !== i ) {
                            var s = symbol.symbols[k[j]];
                            df = Parser.multiply( df, s );
                        }
                    }

                    stack.push( df );
                }
            }
            // We have all the derivatives but let's return a symbol
            if( stack.length === 1 ) {
                result = stack[0];
                result.multiplier *= symbol.multiplier;
            }
            else {
                var r = {};
                l = stack.length;
                for( i=0; i<l; i++ ) {
                    var c = stack[i];
                    Parser.addSymbol( c, r );
                }
                result = Parser.packSymbol( r );
            }
            return result;
        };


        Formatting.latex = function( obj ) {

            if( isSymbol( obj ) ) {
                var symbol = obj,
                    g = symbol.group,
                    m = Fraction.convert( symbol.multiplier );
                if( g === N ) return Formatting.frac( m );
                // Determine which bracket to use for current format
                var prefix = '~',
                    sign = '',
                    bracket = inBraces,
//                    m =  Fraction.convert( symbol.multiplier ),
                    p = symbol.power,
                    sqrt = p === 0.5 || p === -0.5;
                // Format the power
                if( !sqrt ) {
                    // First check if we have a symbol as the power
                    p =  isSymbol( p ) ? Formatting.latex( p ) :  Math.abs( p );
                    // Fow put it as a fraction
                    p = ( isInt( p ) ? p : ( !isNaN( p ) ? Fraction.convert( p ) : p ) );
                    // Format the power of the symbols. If it's 1... **poof**
                    p = p === 1 || p === -1 ? '' : '^'+bracket( Formatting.frac( p ) );
                }

                // Grab the sign
                if( m[0] < 0 ) {
                    m[0] = Math.abs( m[0] );
                    sign = '-';
                }
                var dress = function( v, f, tex ) {
                    return ( sqrt ? '\\sqrt'+bracket( v ): ( p ? f( v, tex) : v )+p );
                };

                var tex = (function(){
                    var g = symbol.group,
                        value,
                        addBrackets = false;
                    if( g === S || g === EX  ) {
                        value = symbol.value;

                        // Some pretty prebuilts
                        var greek = [ 'alpha', 'beta', 'gamma', 'delta', 'zeta', 'eta', 'theta', 'iota',
                            'kappa', 'mu', 'nu', 'xi', 'rho', 'sigma', 'tau', 'chi', 'psi', 'omega', 'pi' ];
                        if( greek.indexOf( value ) !== -1 ) value = '\\'+value;

                        value = dress( symbol.symbols ? Formatting.latex( symbol.symbols ): value, bracket );
                    }
                    else if( g === FN ) {
                        //grab the name of the function
                        var name = symbol.value;

                        value = Formatting.latex( symbol.symbols );

                        if( name === 'parens' ) {
                            if( sqrt ) { name = value; }
                            else { name = inBrackets( value, true ); }
                        }
                        else if( name === 'abs' ) {
                            name = '\\left|'+value+'\\right|';
                        }
                        else if( name === 'sum' ) {
                            name = '\\sum_'+inBraces(symbol.params[0]+'='+symbol.params[1])+'^'+
                                inBraces(symbol.params[2])+' '+inBraces(value, true);
                        }
                        else {
                            name = '\\'+ name + inBrackets( value, true);
                        }
                        value = dress( name, function(v){ return v; });

                    }
                    else if( g > FN ) {
                        // First we need to build the value
                        if( g === CB ) {
                            var t = [m[0],1]; m[0] = 1;
                            for( var x in symbol.symbols ) {
                                var s = symbol.symbols[x];
                                value = Formatting.latex( s ).replace(/\\frac\{1\}/,'');
                                if( s.group === CP ) value = inBrackets( value, true );
                                Formatting.attach( value, t, s.power, prefix );
                            }
                            value =  Formatting.frac( t );
                            if( symbol.multiplier !== -1 ) addBrackets = true;
                        }
                        else if( g === CP || g === PL ) {
                            value = Formatting.latex( symbol.symbols );
                            if( symbol.power === 1 ) addBrackets = true;
                        }
                        value = dress( value, inBrackets, true );
                    }
                    if( symbol.multiplier !== 1 && g !== CB && addBrackets  ) value = inBrackets( value, true );
                    Formatting.attach( value, m, symbol.power, prefix );
                    value = Formatting.frac( m );
                    return value;
                })();
                return sign+tex;
            }
            else {
                var values = [];
                for( var x in obj ) {
                    values.push( Formatting.latex( obj[x]) );
                }
                return values.join('+').replace(/\+\-/g,'-');
            }
        };

        Formatting.attach = function( value, arr, power, prefix ) {
            prefix = prefix || '';
            // Choose whether we're going top or bottom.
            var loc = isNeg( power ) ? 1 : 0;
            arr[loc] = arr[loc] === 1 ? value : arr[loc] += prefix+value;
        };

        Formatting.frac = function( arr ){
            if(!arr ) return '';
            if( !isArray( arr ) ) return arr;
            if( arr[1] === 1 ) return arr[0];
            return '\\frac{'+arr[0]+'}{'+arr[1]+'}';
        };

        Algebra.polydivide = function( symbol1, symbol2 ) {
            if( !symbol1.isPoly() || !symbol2.isPoly() ) throw new Error('Both symbols must be polynomials!');
        };

        Algebra.transform = function( symbol ) {
            var g = symbol.group;
            // Is it a rational symbol? If so transform
            if( ( g === CP || g === S || g === PL ) && symbol.power < 0 ) {
                ;
            }
            return symbol;
        };

        Algebra.expand = function( symbol ) {
            var k = keys( symbol.symbols );

            //TODO: prevent this from happening in the first place
            if( k.length === 1 && symbol.symbols[k[0]].group === CP ) symbol = symbol.symbols[k[0]];

            if( isInt( symbol.power ) && symbol.group === CP ) {
                var l = symbol.power,
                    t, obj;
                for( var i=0; i<l-1; i++ ) {
                    obj =  t || symbol.symbols;
                    t = {};
                    for( var x in symbol.symbols ) {
                        for( var y in obj ) {
                            var r = Parser.multiply( obj[y].copy(), symbol.symbols[x].copy() );
                            //Parser.addSymbol does not expand the multiplier of groups PL && CP so...
                            if( r.group === PL && r.multiplier !== 1 && r.power === 1 /*may be an unnecessary check*/) {
                                for( var z in r.symbols ) {
                                    r.symbols[z].multiplier *= r.multiplier;
                                }
                                r.multiplier = 1;
                            }
                            Parser.addSymbol( r, t );
                        }
                    }
                }
                if( t ) {
                    symbol.power = 1;
                    symbol.symbols = t;
                }
            }
            return symbol;
        };

        Algebra.findRoot = function( f, guess, dx ) {
            var newtonraph = function(xn) {
                var mesh = 1e-12,
                    // If the derivative was already provided then don't recalculate.
                    df = dx ? dx : Calculus.diff(f, variables(f)[0]).buildFunction(),

                    // If the function was passed in as a function then don't recalculate.
                    fn = f instanceof Function ? f : f.buildFunction(),
                    max = 10000,
                    done = false,
                    safety = 0;
                while( !done ) {
                    var x = xn-(fn(xn)/df(xn));
                    var delta = Math.abs( x - xn );
                    xn = x;
                    if( safety > max )
                    if( delta < mesh || safety > max ) done = true;

                    safety++;
                }
                return xn;
            };
            return newtonraph( Number( guess ) );
        };

        /*
         * Other than the preparation of the coefficients,
         * this function is Mr. David Binner's javascript port of the Jenkins-Traub algorithm.
         * The original source code can be found here http://www.akiti.ca/PolyRootRe.html.
         * Many thanks to Mr. Binner for allowing the use of his port.
         */
        Algebra.pRoots = function( symbol, decp ) {
            //the roots will be rounded up to 7 decimal places.
            //if this cause trouble you can explicitly pass in a different number of places
            decp = decp || 7;
            if( isSymbol( symbol ) && symbol.isPoly() ) {
                if( symbol.group === S ) {
                    return [0];
                }
                return roots();
            }
            else {
                throw new Error('Cannot calculate roots. Symbol must be a polynomial!')
            }

            function roots(){
                var MAXDEGREE = 100,             // Degree of largest polynomial accepted by this script.
                    variable = keys( symbol.symbols ).sort().pop(),
                    sym = symbol.symbols[variable],
                    g = sym.group,
                    powers = g === S ? [sym.power+''] : keys( sym.symbols ),
                    rarr = [],
                    max = arrayMax( powers ); //maximum power and degree of polynomial to be solved

                // Prepare the data
                for( var i=1; i<=max; i++) {
                    var c = 0; //if there is no power then the hole must be filled with a zero
                    if( powers.indexOf(i+'') !== -1 ) {
                        if( g === S ) {
                            c = sym.multiplier;
                        }
                        else {
                            c = sym.symbols[i].multiplier;
                        }
                    }
                    // Insert the coeffient but from the front
                    rarr.unshift( c );
                }
                rarr.push( symbol.symbols._.multiplier );
                // Make a copy of the coefficients before appending the max power
                var p = rarr.slice(0);

                // Divide the string up into its individual entries, which--presumably--are separated by whitespace
                rarr.unshift( max );


                if ( max > MAXDEGREE){
                    throw new Error("This utility accepts polynomials of degree up to " + MAXDEGREE + ". " );
                }

                var zeroi = [],   // Vector of imaginary components of roots
                    degreePar = {};    // degreePar is a dummy variable for passing the parameter POLYDEGREE by reference
                degreePar.Degree = max;

                for ( i = 0; i < max; i++) {
                    zeroi.push(0);
                }
                var zeror = zeroi.slice(0); // Vector of real components of roots

                // Find the roots
                //--> Begin Jenkins-Traub

                /*
                 * A verbatim copy of Mr. David Binner's Jenkins-Traub port
                */
               function QuadSD_ak1(NN, u, v, p, q, iPar){
                   // Divides p by the quadratic 1, u, v placing the quotient in q and the remainder in a, b
                   // iPar is a dummy variable for passing in the two parameters--a and b--by reference
                   q[0] = iPar.b = p[0];
                   q[1] = iPar.a = -(u*iPar.b) + p[1];

                   for (var i = 2; i < NN; i++){
                       q[i] = -(u*iPar.a + v*iPar.b) + p[i];
                       iPar.b = iPar.a;
                       iPar.a = q[i];
                   }
                   return;
               }

               function calcSC_ak1(DBL_EPSILON, N, a, b, iPar, K, u, v, qk){
                   // This routine calculates scalar quantities used to compute the next K polynomial and
                   // new estimates of the quadratic coefficients.
                   // calcSC -	integer variable set here indicating how the calculations are normalized
                   // to avoid overflow.
                   // iPar is a dummy variable for passing in the nine parameters--a1, a3, a7, c, d, e, f, g, and h --by reference

                   // sdPar is a dummy variable for passing the two parameters--c and d--into QuadSD_ak1 by reference
                   var sdPar = new Object(),
                   // TYPE = 3 indicates the quadratic is almost a factor of K
                       dumFlag = 3;

                   // Synthetic division of K by the quadratic 1, u, v
                   sdPar.b =  sdPar.a = 0.0;
                   QuadSD_ak1(N, u, v, K, qk, sdPar);
                   iPar.c = sdPar.a;
                   iPar.d = sdPar.b;

                   if (Math.abs(iPar.c) <= (100.0*DBL_EPSILON*Math.abs(K[N - 1]))) {
                       if (Math.abs(iPar.d) <= (100.0*DBL_EPSILON*Math.abs(K[N - 2])))  return dumFlag;
                   }

                   iPar.h = v*b;
                   if (Math.abs(iPar.d) >= Math.abs(iPar.c)){
                         // TYPE = 2 indicates that all formulas are divided by d
                       dumFlag = 2;
                       iPar.e = a/(iPar.d);
                       iPar.f = (iPar.c)/(iPar.d);
                       iPar.g = u*b;
                       iPar.a3 = (iPar.e)*((iPar.g) + a) + (iPar.h)*(b/(iPar.d));
                       iPar.a1 = -a + (iPar.f)*b;
                       iPar.a7 = (iPar.h) + ((iPar.f) + u)*a;
                   }
                   else {
                       // TYPE = 1 indicates that all formulas are divided by c;
                       dumFlag = 1;
                       iPar.e = a/(iPar.c);
                       iPar.f = (iPar.d)/(iPar.c);
                       iPar.g = (iPar.e)*u;
                       iPar.a3 = (iPar.e)*a + ((iPar.g) + (iPar.h)/(iPar.c))*b;
                       iPar.a1 = -(a*((iPar.d)/(iPar.c))) + b;
                       iPar.a7 = (iPar.g)*(iPar.d) + (iPar.h)*(iPar.f) + a;
                   }
                   return dumFlag;
               }

               function nextK_ak1(DBL_EPSILON, N, tFlag, a, b, iPar, K, qk, qp){
                   // Computes the next K polynomials using the scalars computed in calcSC_ak1
                   // iPar is a dummy variable for passing in three parameters--a1, a3, and a7
                   var temp;
                   if (tFlag == 3){	// Use unscaled form of the recurrence
                       K[1] = K[0] = 0.0;
                       for (var i = 2; i < N; i++)	 { K[i] = qk[i - 2]; }
                       return;
                   }

                   temp = ((tFlag == 1) ? b : a);
                   if (Math.abs(iPar.a1) > (10.0*DBL_EPSILON*Math.abs(temp))){
                       // Use scaled form of the recurrence
                       iPar.a7 /= iPar.a1;
                       iPar.a3 /= iPar.a1;
                       K[0] = qp[0];
                       K[1] = -(qp[0]*iPar.a7) + qp[1];
                       for (var i = 2; i < N; i++)	 K[i] = -(qp[i - 1]*iPar.a7) + qk[i - 2]*iPar.a3 + qp[i];
                   }
                   else {
                       // If a1 is nearly zero, then use a special form of the recurrence
                       K[0] = 0.0;
                       K[1] = -(qp[0]*iPar.a7);
                       for (var i = 2; i < N; i++) { K[i] = -(qp[i - 1]*iPar.a7) + qk[i - 2]*iPar.a3; }
                   }
                   return;
               }

               function newest_ak1(tFlag, iPar, a, a1, a3, a7, b, c, d, f, g, h, u, v, K, N, p){
                   // Compute new estimates of the quadratic coefficients using the scalars computed in calcSC_ak1
                   // iPar is a dummy variable for passing in the two parameters--uu and vv--by reference
                   // iPar.a = uu, iPar.b = vv

                   var a4, a5, b1, b2, c1, c2, c3, c4, temp;
                   iPar.b = iPar.a = 0.0;// The quadratic is zeroed

                   if (tFlag != 3){
                       if (tFlag != 2){
                           a4 = a + u*b + h*f;
                           a5 = c + (u + v*f)*d;
                       }
                       else {
                           a4 = (a + g)*f + h;
                           a5 = (f + u)*c + v*d;
                       }

                       // Evaluate new quadratic coefficients
                       b1 = -(K[N - 1]/p[N]);
                       b2 = -(K[N - 2] + b1*p[N - 1])/p[N];
                       c1 = v*b2*a1;
                       c2 = b1*a7;
                       c3 = b1*b1*a3;
                       c4 = -(c2 + c3) + c1;
                       temp = -c4 + a5 + b1*a4;
                       if (temp != 0.0) {
                           iPar.a = -((u*(c3 + c2) + v*(b1*a1 + b2*a7))/temp) + u;
                           iPar.b = v*(1.0 + c4/temp);
                       }
                   }
                   return;
               }

               function Quad_ak1(a, b1, c, iPar){
                   // Calculates the zeros of the quadratic a*Z^2 + b1*Z + c
                   // The quadratic formula, modified to avoid overflow, is used to find the larger zero if the
                   // zeros are real and both zeros are complex. The smaller real zero is found directly from
                   // the product of the zeros c/a.

                   // iPar is a dummy variable for passing in the four parameters--sr, si, lr, and li--by reference

                   var b, d, e;
                   iPar.sr = iPar.si = iPar.lr = iPar.li = 0.0;

                   if (a == 0) {
                       iPar.sr = ((b1 != 0) ? -(c/b1) : iPar.sr);
                       return;
                   }
                   if (c == 0){
                       iPar.lr = -(b1/a);
                       return;
                   }

                   // Compute discriminant avoiding overflow
                   b = b1/2.0;
                   if (Math.abs(b) < Math.abs(c)){
                       e = ((c >= 0) ? a : -a);
                       e = -e + b*(b/Math.abs(c));
                       d = Math.sqrt(Math.abs(e))*Math.sqrt(Math.abs(c));
                   }
                   else {
                       e = -((a/b)*(c/b)) + 1.0;
                       d = Math.sqrt(Math.abs(e))*(Math.abs(b));
                   }

                   if (e >= 0) {
                       // Real zeros
                       d = ((b >= 0) ? -d : d);
                       iPar.lr = (-b + d)/a;
                       iPar.sr = ((iPar.lr != 0) ? (c/(iPar.lr))/a : iPar.sr);
                   }
                   else {
                       // Complex conjugate zeros
                       iPar.lr = iPar.sr = -(b/a);
                       iPar.si = Math.abs(d/a);
                       iPar.li = -(iPar.si);
                   }
                   return;
               }

               function QuadIT_ak1(DBL_EPSILON, N, iPar, uu, vv, qp, NN, sdPar, p, qk, calcPar, K){
                   // Variable-shift K-polynomial iteration for a quadratic factor converges only if the
                   // zeros are equimodular or nearly so.
                   // iPar is a dummy variable for passing in the five parameters--NZ, lzi, lzr, szi, and szr--by reference
                   // sdPar is a dummy variable for passing the two parameters--a and b--in by reference
                   // calcPar is a dummy variable for passing the nine parameters--a1, a3, a7, c, d, e, f, g, and h --in by reference

                   var qPar = new Object(),    // qPar is a dummy variable for passing the four parameters--szr, szi, lzr, and lzi--into Quad_ak1 by reference
                       ee, mp, omp, relstp, t, u, ui, v, vi, zm,
                       i, j = 0, tFlag, triedFlag = 0;   // Integer variables

                   iPar.NZ = 0;// Number of zeros found
                   u = uu; // uu and vv are coefficients of the starting quadratic
                   v = vv;

                   do {
                       qPar.li = qPar.lr =  qPar.si = qPar.sr = 0.0;
                       Quad_ak1(1.0, u, v, qPar);
                       iPar.szr = qPar.sr;
                       iPar.szi = qPar.si;
                       iPar.lzr = qPar.lr;
                       iPar.lzi = qPar.li;

                       // Return if roots of the quadratic are real and not close to multiple or nearly
                       // equal and of opposite sign.
                       if (Math.abs(Math.abs(iPar.szr) - Math.abs(iPar.lzr)) > 0.01*Math.abs(iPar.lzr))  break;

                       // Evaluate polynomial by quadratic synthetic division

                       QuadSD_ak1(NN, u, v, p, qp, sdPar);

                       mp = Math.abs(-((iPar.szr)*(sdPar.b)) + (sdPar.a)) + Math.abs((iPar.szi)*(sdPar.b));

                       // Compute a rigorous bound on the rounding error in evaluating p

                       zm = Math.sqrt(Math.abs(v));
                       ee = 2.0*Math.abs(qp[0]);
                       t = -((iPar.szr)*(sdPar.b));

                       for (i = 1; i < N; i++)  { ee = ee*zm + Math.abs(qp[i]); }

                       ee = ee*zm + Math.abs(t + sdPar.a);
                       ee = (9.0*ee + 2.0*Math.abs(t) - 7.0*(Math.abs((sdPar.a) + t) + zm*Math.abs((sdPar.b))))*DBL_EPSILON;

                       // Iteration has converged sufficiently if the polynomial value is less than 20 times this bound
                       if (mp <= 20.0*ee){
                           iPar.NZ = 2;
                           break;
                       }

                       j++;
                       // Stop iteration after 20 steps
                       if (j > 20)  break;
                       if (j >= 2){
                           if ((relstp <= 0.01) && (mp >= omp) && (!triedFlag)){
                               // A cluster appears to be stalling the convergence. Five fixed shift
                               // steps are taken with a u, v close to the cluster.
                               relstp = ((relstp < DBL_EPSILON) ? Math.sqrt(DBL_EPSILON) : Math.sqrt(relstp));
                               u -= u*relstp;
                               v += v*relstp;

                               QuadSD_ak1(NN, u, v, p, qp, sdPar);
                               for (i = 0; i < 5; i++){
                                   tFlag = calcSC_ak1(DBL_EPSILON, N, sdPar.a, sdPar.b, calcPar, K, u, v, qk);
                                   nextK_ak1(DBL_EPSILON, N, tFlag, sdPar.a, sdPar.b, calcPar, K, qk, qp);
                               }

                               triedFlag = 1;
                               j = 0;

                           }
                       }
                       omp = mp;

                       // Calculate next K polynomial and new u and v
                       tFlag = calcSC_ak1(DBL_EPSILON, N, sdPar.a, sdPar.b, calcPar, K, u, v, qk);
                       nextK_ak1(DBL_EPSILON, N, tFlag, sdPar.a, sdPar.b, calcPar, K, qk, qp);
                       tFlag = calcSC_ak1(DBL_EPSILON, N, sdPar.a, sdPar.b, calcPar, K, u, v, qk);
                       newest_ak1(tFlag, sdPar, sdPar.a, calcPar.a1, calcPar.a3, calcPar.a7, sdPar.b, calcPar.c, calcPar.d, calcPar.f, calcPar.g, calcPar.h, u, v, K, N, p);
                       ui = sdPar.a;
                       vi = sdPar.b;

                       // If vi is zero, the iteration is not converging
                       if (vi != 0){
                           relstp = Math.abs((-v + vi)/vi);
                           u = ui;
                           v = vi;
                       }
                   } while (vi != 0);
                   return;
               }

               function RealIT_ak1(DBL_EPSILON, iPar, sdPar, N, p, NN, qp, K, qk){
                   // Variable-shift H-polynomial iteration for a real zero
                   // sss	- starting iterate = sdPar.a
                   // NZ		- number of zeros found = iPar.NZ
                   // dumFlag	- flag to indicate a pair of zeros near real axis, returned to iFlag

                   var ee, kv, mp, ms, omp, pv, s, t,
                       dumFlag, i, j, nm1 = N - 1;   // Integer variables

                   iPar.NZ = j = dumFlag = 0;
                   s = sdPar.a;

                   for ( ; ; ) {
                       pv = p[0];

                       // Evaluate p at s
                       qp[0] = pv;
                       for (i = 1; i < NN; i++)  { qp[i] = pv = pv*s + p[i]; }
                       mp = Math.abs(pv);

                       // Compute a rigorous bound on the error in evaluating p
                       ms = Math.abs(s);
                       ee = 0.5*Math.abs(qp[0]);
                       for (i = 1; i < NN; i++)  { ee = ee*ms + Math.abs(qp[i]); }

                       // Iteration has converged sufficiently if the polynomial value is less than
                       // 20 times this bound
                       if (mp <= 20.0*DBL_EPSILON*(2.0*ee - mp)){
                           iPar.NZ = 1;
                           iPar.szr = s;
                           iPar.szi = 0.0;
                           break;
                       }
                       j++;
                       // Stop iteration after 10 steps
                       if (j > 10)  break;

                       if (j >= 2){
                           if ((Math.abs(t) <= 0.001*Math.abs(-t + s)) && (mp > omp)){
                               // A cluster of zeros near the real axis has been encountered.
                               // Return with iFlag set to initiate a quadratic iteration.
                               dumFlag = 1;
                               iPar.a = s;
                               break;
                           } // End if ((fabs(t) <= 0.001*fabs(s - t)) && (mp > omp))
                       } //End if (j >= 2)

                       // Return if the polynomial value has increased significantly
                       omp = mp;

                       // Compute t, the next polynomial and the new iterate
                       qk[0] = kv = K[0];
                       for (i = 1; i < N; i++)	 { qk[i] = kv = kv*s + K[i]; }

                       if (Math.abs(kv) > Math.abs(K[nm1])*10.0*DBL_EPSILON){
                           // Use the scaled form of the recurrence if the value of K at s is non-zero
                           t = -(pv/kv);
                           K[0] = qp[0];
                           for (i = 1; i < N; i++) { K[i] = t*qk[i - 1] + qp[i]; }
                       }
                       else {
                           // Use unscaled form
                           K[0] = 0.0;
                           for (i = 1; i < N; i++)	 K[i] = qk[i - 1];
                       }

                       kv = K[0];
                       for (i = 1; i < N; i++) { kv = kv*s + K[i]; }
                       t = ((Math.abs(kv) > (Math.abs(K[nm1])*10.0*DBL_EPSILON)) ? -(pv/kv) : 0.0);
                       s += t;
                   }
                   return dumFlag;
               }

               function Fxshfr_ak1(DBL_EPSILON, MDP1, L2, sr, v, K, N, p, NN, qp, u, iPar){

                   // Computes up to L2 fixed shift K-polynomials, testing for convergence in the linear or
                   // quadratic case. Initiates one of the variable shift iterations and returns with the
                   // number of zeros found.
                   // L2	limit of fixed shift steps
                   // iPar is a dummy variable for passing in the five parameters--NZ, lzi, lzr, szi, and szr--by reference
                   // NZ	number of zeros found
                   var sdPar = new Object(),    // sdPar is a dummy variable for passing the two parameters--a and b--into QuadSD_ak1 by reference
                       calcPar = new Object(),
                       // calcPar is a dummy variable for passing the nine parameters--a1, a3, a7, c, d, e, f, g, and h --into calcSC_ak1 by reference

                       qk = new Array(MDP1),
                       svk = new Array(MDP1),
                       a, b, betas, betav, oss, ots, otv, ovv, s, ss, ts, tss, tv, tvv, ui, vi, vv,
                       fflag, i, iFlag = 1, j, spass, stry, tFlag, vpass, vtry;     // Integer variables

                   iPar.NZ = 0;
                   betav = betas = 0.25;
                   oss = sr;
                   ovv = v;

                   //Evaluate polynomial by synthetic division
                   sdPar.b =  sdPar.a = 0.0;
                   QuadSD_ak1(NN, u, v, p, qp, sdPar);
                   a = sdPar.a;
                   b = sdPar.b;
                   calcPar.h = calcPar.g = calcPar.f = calcPar.e = calcPar.d = calcPar.c = calcPar.a7 = calcPar.a3 = calcPar.a1 = 0.0;
                   tFlag = calcSC_ak1(DBL_EPSILON, N, a, b, calcPar, K, u, v, qk);

                   for (j = 0; j < L2; j++){
                       fflag = 1;

                       // Calculate next K polynomial and estimate v
                       nextK_ak1(DBL_EPSILON, N, tFlag, a, b, calcPar, K, qk, qp);
                       tFlag = calcSC_ak1(DBL_EPSILON, N, a, b, calcPar, K, u, v, qk);

                       // Use sdPar for passing in uu and vv instead of defining a brand-new variable.
                       // sdPar.a = ui, sdPar.b = vi
                       newest_ak1(tFlag, sdPar, a, calcPar.a1, calcPar.a3, calcPar.a7, b, calcPar.c, calcPar.d, calcPar.f, calcPar.g, calcPar.h, u, v, K, N, p);
                       ui = sdPar.a;
                       vv = vi = sdPar.b;

                       // Estimate s
                       ss = ((K[N - 1] != 0.0) ? -(p[N]/K[N - 1]) : 0.0);
                       ts = tv = 1.0;

                       if ((j != 0) && (tFlag != 3)){
                           // Compute relative measures of convergence of s and v sequences
                           tv = ((vv != 0.0) ? Math.abs((vv - ovv)/vv) : tv);
                           ts = ((ss != 0.0) ? Math.abs((ss - oss)/ss) : ts);

                           // If decreasing, multiply the two most recent convergence measures
                           tvv = ((tv < otv) ? tv*otv : 1.0);
                           tss = ((ts < ots) ? ts*ots : 1.0);

                           // Compare with convergence criteria
                           vpass = ((tvv < betav) ? 1 : 0);
                           spass = ((tss < betas) ? 1 : 0);

                           if ((spass) || (vpass)){

                               // At least one sequence has passed the convergence test.
                               // Store variables before iterating

                               for (i = 0; i < N; i++) { svk[i] = K[i]; }
                               s = ss;

                               // Choose iteration according to the fastest converging sequence

                                 stry = vtry = 0;

                               for ( ; ; ) {
                                   if ((fflag && ((fflag = 0) == 0)) && ((spass) && (!vpass || (tss < tvv)))){
                                       ;// Do nothing. Provides a quick "short circuit".
                                   }
                                   else {
                                       QuadIT_ak1(DBL_EPSILON, N, iPar, ui, vi, qp, NN, sdPar, p, qk, calcPar, K);
                                       a = sdPar.a;
                                       b = sdPar.b;

                                       if ((iPar.NZ) > 0) return;

                                       // Quadratic iteration has failed. Flag that it has been tried and decrease the
                                       // convergence criterion
                                       iFlag = vtry = 1;
                                       betav *= 0.25;

                                       // Try linear iteration if it has not been tried and the s sequence is converging
                                       if (stry || (!spass)){
                                           iFlag = 0;
                                       }
                                       else {
                                           for (i = 0; i < N; i++) K[i] = svk[i];
                                       }
                                   }
                                   //fflag = 0;
                                   if (iFlag != 0){
                                       // Use sdPar for passing in s instead of defining a brand-new variable.
                                       // sdPar.a = s
                                       sdPar.a = s;
                                       iFlag = RealIT_ak1(DBL_EPSILON, iPar, sdPar, N, p, NN, qp, K, qk);
                                       s = sdPar.a;

                                       if ((iPar.NZ) > 0) return;

                                       // Linear iteration has failed. Flag that it has been tried and decrease the
                                       // convergence criterion
                                       stry = 1;
                                       betas *= 0.25;

                                       if (iFlag != 0){
                                           // If linear iteration signals an almost double real zero, attempt quadratic iteration
                                           ui = -(s + s);
                                           vi = s*s;
                                           continue;

                                       }
                                   }

                                   // Restore variables
                                   for (i = 0; i < N; i++) K[i] = svk[i];

                                   // Try quadratic iteration if it has not been tried and the v sequence is converging
                                   if (!vpass || vtry) break;		// Break out of infinite for loop

                               }

                               // Re-compute qp and scalar values to continue the second stage

                               QuadSD_ak1(NN, u, v, p, qp, sdPar);
                               a = sdPar.a;
                               b = sdPar.b;

                               tFlag = calcSC_ak1(DBL_EPSILON, N, a, b, calcPar, K, u, v, qk);
                           }
                       }
                       ovv = vv;
                       oss = ss;
                       otv = tv;
                       ots = ts;
                   }
                   return;
               }

               function rpSolve(degPar, p, zeror, zeroi){
                   var N = degPar.Degree,
                       RADFAC = 3.14159265358979323846/180,  // Degrees-to-radians conversion factor = PI/180
                       LB2 = Math.LN2,// Dummy variable to avoid re-calculating this value in loop below
                       MDP1 = degPar.Degree + 1,
                       K = new Array(MDP1),
                       pt = new Array(MDP1),
                       qp = new Array(MDP1),
                       temp = new Array(MDP1),
                       // qPar is a dummy variable for passing the four parameters--sr, si, lr, and li--by reference
                       qPar = new Object(),
                       // Fxshfr_Par is a dummy variable for passing parameters by reference : NZ, lzi, lzr, szi, szr);
                       Fxshfr_Par = new Object(),
                       bnd, DBL_EPSILON, df, dx, factor, ff, moduli_max, moduli_min, sc, x, xm,
                       aa, bb, cc, sr, t, u, xxx,
                       j, jj, l, NM1, NN, zerok;// Integer variables

                   // Calculate the machine epsilon and store in the variable DBL_EPSILON.
                   // To calculate this value, just use existing variables rather than create new ones that will be used only for this code block
                   aa = 1.0;
                   do {
                       DBL_EPSILON = aa;
                       aa /= 2;
                       bb = 1.0 + aa;
                   } while (bb > 1.0);

                   var LO = Number.MIN_VALUE/DBL_EPSILON,
                       cosr = Math.cos(94.0*RADFAC),// = -0.069756474
                       sinr = Math.sin(94.0*RADFAC),// = 0.99756405
                       xx = Math.sqrt(0.5),// = 0.70710678
                       yy = -xx;

                   Fxshfr_Par.NZ = j = 0;
                   Fxshfr_Par.szr = Fxshfr_Par.szi =  Fxshfr_Par.lzr = Fxshfr_Par.lzi = 0.0;

                   // Remove zeros at the origin, if any
                   while (p[N] == 0){
                       zeror[j] = zeroi[j] = 0;
                       N--;
                       j++;
                   }
                   NN = N + 1;

                   // >>>>> Begin Main Loop <<<<<
                   while (N >= 1){ // Main loop
                       // Start the algorithm for one zero
                       if (N <= 2){
                           // Calculate the final zero or pair of zeros
                           if (N < 2){
                               zeror[degPar.Degree - 1] = -(p[1]/p[0]);
                               zeroi[degPar.Degree - 1] = 0;
                           }
                           else {
                               qPar.li = qPar.lr =  qPar.si = qPar.sr = 0.0;
                               Quad_ak1(p[0], p[1], p[2], qPar);
                               zeror[degPar.Degree - 2] = qPar.sr;
                               zeroi[degPar.Degree - 2] = qPar.si;
                               zeror[degPar.Degree - 1] = qPar.lr;
                               zeroi[degPar.Degree - 1] = qPar.li;
                           }
                             break;
                       }

                       // Find the largest and smallest moduli of the coefficients
                       moduli_max = 0.0;
                       moduli_min = Number.MAX_VALUE;

                       for (i = 0; i < NN; i++){
                           x = Math.abs(p[i]);
                           if (x > moduli_max) moduli_max = x;
                           if ((x != 0) && (x < moduli_min)) moduli_min = x;
                       }

                       // Scale if there are large or very small coefficients
                       // Computes a scale factor to multiply the coefficients of the polynomial. The scaling
                       // is done to avoid overflow and to avoid undetected underflow interfering with the
                       // convergence criterion.
                       // The factor is a power of the base.
                       sc = LO/moduli_min;

                       if (((sc <= 1.0) && (moduli_max >= 10)) || ((sc > 1.0) && (Number.MAX_VALUE/sc >= moduli_max))){
                           sc = ((sc == 0) ? Number.MIN_VALUE : sc);
                           l = Math.floor(Math.log(sc)/LB2 + 0.5);
                           factor = Math.pow(2.0, l);
                           if (factor != 1.0){
                               for (i = 0; i < NN; i++) p[i] *= factor;
                           }
                       }

                       // Compute lower bound on moduli of zeros
                       for (var i = 0; i < NN; i++) pt[i] = Math.abs(p[i]);
                       pt[N] = -(pt[N]);
                       NM1 = N - 1;

                       // Compute upper estimate of bound
                       x = Math.exp((Math.log(-pt[N]) - Math.log(pt[0]))/N);

                       if (pt[NM1] != 0) {
                           // If Newton step at the origin is better, use it
                           xm = -pt[N]/pt[NM1];
                           x = ((xm < x) ? xm : x);
                       }

                       // Chop the interval (0, x) until ff <= 0
                       xm = x;
                       do {
                           x = xm;
                           xm = 0.1*x;
                           ff = pt[0];
                           for (var i = 1; i < NN; i++) { ff = ff *xm + pt[i]; }
                       } while (ff > 0); // End do-while loop

                       dx = x;
                       // Do Newton iteration until x converges to two decimal places

                       do {
                           df = ff = pt[0];
                           for (var i = 1; i < N; i++){
                               ff = x*ff + pt[i];
                               df = x*df + ff;
                           } // End for i
                           ff = x*ff + pt[N];
                           dx = ff/df;
                           x -= dx;
                       } while (Math.abs(dx/x) > 0.005); // End do-while loop

                       bnd = x;

                       // Compute the derivative as the initial K polynomial and do 5 steps with no shift
                       for (var i = 1; i < N; i++) K[i] = (N - i)*p[i]/N;
                       K[0] = p[0];
                       aa = p[N];
                       bb = p[NM1];
                       zerok = ((K[NM1] == 0) ? 1 : 0);

                       for (jj = 0; jj < 5; jj++) {
                           cc = K[NM1];
                               if (zerok){
                                   // Use unscaled form of recurrence
                                   for (var i = 0; i < NM1; i++){
                                       j = NM1 - i;
                                       K[j] = K[j - 1];
                                   } // End for i
                                   K[0] = 0;
                                   zerok = ((K[NM1] == 0) ? 1 : 0);
                               }
                               else {
                                   // Used scaled form of recurrence if value of K at 0 is nonzero
                                   t = -aa/cc;
                                   for (var i = 0; i < NM1; i++){
                                       j = NM1 - i;
                                       K[j] = t*K[j - 1] + p[j];
                                   } // End for i
                                   K[0] = p[0];
                                   zerok = ((Math.abs(K[NM1]) <= Math.abs(bb)*DBL_EPSILON*10.0) ? 1 : 0);
                               }
                       }

                       // Save K for restarts with new shifts
                       for (var i = 0; i < N; i++) temp[i] = K[i];

                       // Loop to select the quadratic corresponding to each new shift
                       for (jj = 1; jj <= 20; jj++){

                           // Quadratic corresponds to a double shift to a non-real point and its
                           // complex conjugate. The point has modulus BND and amplitude rotated
                           // by 94 degrees from the previous shift.

                           xxx = -(sinr*yy) + cosr*xx;
                           yy = sinr*xx + cosr*yy;
                           xx = xxx;
                           sr = bnd*xx;
                           u = -(2.0*sr);

                           // Second stage calculation, fixed quadratic
                           Fxshfr_ak1(DBL_EPSILON, MDP1, 20*jj, sr, bnd, K, N, p, NN, qp, u, Fxshfr_Par);

                           if (Fxshfr_Par.NZ != 0){
                               // The second stage jumps directly to one of the third stage iterations and
                               // returns here if successful. Deflate the polynomial, store the zero or
                               // zeros, and return to the main algorithm.
                               j = degPar.Degree - N;
                               zeror[j] = Fxshfr_Par.szr;
                               zeroi[j] = Fxshfr_Par.szi;
                               NN = NN - Fxshfr_Par.NZ;
                               N = NN - 1;
                               for (var i = 0; i < NN; i++) p[i] = qp[i];
                               if (Fxshfr_Par.NZ != 1){
                                   zeror[j + 1] = Fxshfr_Par.lzr;
                                   zeroi[j + 1] = Fxshfr_Par.lzi;
                               }
                               break;
                           }
                           else {
                             // If the iteration is unsuccessful, another quadratic is chosen after restoring K
                             for (var i = 0; i < N; i++) { K[i] = temp[i]; }
                           }
                       }
                       // Return with failure if no convergence with 20 shifts
                       if (jj > 20) {
                           degPar.Degree -= N;
                           break;
                       }
                   }
                   // >>>>> End Main Loop <<<<<
                   return;
               }
                //--> End Jenkins-Traub
                rpSolve(degreePar, p, zeror, zeroi);

                var l = zeroi.length;
                //format the output
                for( i=0; i<l; i++ ) {
                    // We round the imaginary part to avoid having something crazy like 5.67e-16.
                    var img = round( zeroi[i], decp+8 ),
                        real = round( zeror[i], decp );
                    // Did the rounding pay off? If the rounding did nothing more than chop off a few digits then no.
                    // If the rounding results in a a number at least 3 digits shorter we'll keep it else we'll keep
                    // the original otherwise the rounding was worth it.
                    real = decp - String( real ).length > 2 ? real : zeror[i];
                    var sign = img < 0 ? '-' : '';

                    // Remove the zeroes
                    if( real === 0 ) { real = ''; }
                    if( img === 0 ) { img = ''; }

                    // Remove 1 as the multiplier and discard imaginary part if there isn't one.
                    img = Math.abs( img ) === 1 ? sign+'i' : ( img ? img+'*i' : '' );

                    var num = ( real && img ) ? real + '+' + img : real+img;
                    zeror[i] = num.replace(/\+\-/g, '-');
                }
                return zeror;
            }
        };
    } //end pRoots

    function loadIndexOf() {
        //http://erik.eae.net/playground/arrayextras/arrayextras.js
        if (!Array.prototype.indexOf) {
            Array.prototype.indexOf = function (obj, fromIndex) {
                if (fromIndex == null) {
                    fromIndex = 0;
                } else if (fromIndex < 0) {
                    fromIndex = Math.max(0, this.length + fromIndex);
                }
                for (var i = fromIndex, j = this.length; i < j; i++) {
                    if (this[i] === obj)
                        return i;
                }
                return -1;
            };
        }
    }

    // Inserts an object into an array or recursively adds items if an array is given
    function insert( arr, item, index ) {
        if( isArray( item ) ) {
            for( var i=0; i<=item.length+1; i++ ){
                insert( arr, item.pop(), index );
            }
        }
        else if( typeof index === 'undefined ') {
            arr.push( item );
        }
        else{
            arr.splice( index, 0, item );
        }
    }

    function isInt( num ) {
        return num % 1 === 0;
    }

    function isArray( arr ) {
        return arr instanceof Array;
    }

    var inBrackets = function( str, tex ) {
        var l = tex ? '\\left' : '',
            r = tex ? '\\right': '';
        return l+'('+str+r+')';
    },

    inBraces = function( str ) {
        return '{'+str+'}';
    },

    round = function( x, s ) {
        s = s || 14;
        return Math.round( x*Math.pow( 10,s ) )/Math.pow( 10,s );
    },

    // Items are do not have a fixed order in objects so only use if you need any first random item in the object
    firstObject = function( obj ) {
        for( var x in obj ) break;
        return obj[x];
    },

    variables = function( obj, vars ) {
        vars  = vars || {};
        if( isSymbol( obj ) ) {
            var g = obj.group; var s = g === EX;
            if( g > S && g !== PL && g !== EX ) {
                variables( obj.symbols, vars );
            }
            else if( g === S || g === PL ) {
                vars[obj.value] = null;
            }
            else if( g === EX ) {
                var ov = obj.value;
                // We don't want a number passed in as a parameter so we check.
                if( isNaN( ov ) ) vars[ov] = null;
                variables( obj.power, vars );
            }
        }
        else {
            for( var x in obj ) {
                variables( obj[x], vars );
            }
        }
        return keys( vars );
    },

    // Enforces rule: must start with a letter and can have any number of underscores or numbers after.
    validateName = function( name, type ) {
        type = type || 'variable';
        var regex = /^[a-z][a-z\d\_]*$/gi;
        if( !( regex.test( name ) ) ) {
            throw new Error( name+' is not a valid '+type+' name' );
        }
    },

    map = function( fn, params, args ) {
        // Organize the parameters
        var subs = {};
        for( var i=0; i<params.length; i++ ) {
            subs[params[i]] = isSymbol( args[i] ) ? text( args[i] ) : args[i];
        }
        return Parser.parse( fn, subs );
    },

    stripWhiteSpace = function( str ) {
        return str.split(' ').join('');
    },

    build = function( fn, argsArray ) {
        var vars = variables( fn ).sort(),
            args = argsArray || vars;

        // If no paramArray was given then vars and params should be the same object
        // if they're not then make sure that the values match.
        if( !( vars === args ) ){
            for( var i=0; i<vars.length; i++ ) {
                if( args.indexOf === -1 ) throw new Error('Wrong number of parameters provided!');
            }
        }
        return new Function( args, 'return '+text( fn, undefined, 'function' )+';' );
    },

    arrayMax = function( arr ) {
        return Math.max.apply( undefined, arr );
    },

    arrayMin = function( arr ) {
        return Math.min.apply( undefined, arr );
    },

    //provides a temporary block where symbols are processed immediately
    numBlock = function( fn ) {
       NUMER = true;
       var ans = fn();
       NUMER = false;
       return ans;
    };

    // This function changes the contents of the stored equation
    function getEquation( equationNumber, fn ) {
        var e = !equationNumber ? EQNS.length - 1 : equationNumber - 1,
            eqn = EQNS[e],
            result = 'No equation found.';
            if( eqn ) {
                eqn.equation =  fn( eqn );
                result = eqn.equation;
            }
        return result;
    }

    function loadReserved() {
        var load = function( obj ) {
            for( var x in obj ) {
                RESERVED.push(x);
            }
        };
        load( functions );
        load( Math2 );
        load( constants );
    }

    function sqrt( symbol ) {
        return Parser.pow( Symbol(0.5), symbol );
    }

    function abs( symbol, fn ) {
        var p = symbol.power;
        if( Math.abs( p ) < 1 ) p = 1/p;

        // An symbol to the power of an even integer is already absolute.
        if( p % 2 === 0 ) { return symbol; }

        fn = fn || Symbol('abs');
        symbol.multiplier = Math.abs( symbol.multiplier );
        return math( fn, symbol );
    }

    function log( symbol ) {
        var result;
        if( ( symbol.value === 'e') && symbol.multiplier === 1 ) {
            result = isSymbol( symbol.power ) ? symbol.power : Symbol( symbol.power );
        }
        else if( ( symbol.value === 'exp') && symbol.multiplier === 1 ) {
            result = Parser.packSymbol( symbol.symbols );
        }
        else {
            var imgPart = '';
            if( symbol.group === N && NUMER && symbol.multiplier < 0 ) {
                symbol.negate();
                imgPart = Parser.parse('PI*i');
            }
            result = math( Symbol('log'), symbol );

            // If there is an imaginary part reinsert it
            if( imgPart ) { result = Parser.parse( result+'+'+imgPart ); }
        }
        return result;
    }

    // A wrapper for methods in the Math object.
    function math( fn , symbol ) {
        var g = symbol.group,
            name = fn.value;
        if( g === N && NUMER ) {
            var f = Math[name] ? Math[name] : Math2[name].fn;
            symbol.multiplier = f( symbol.multiplier );
        }
        else {
            if( (  g === CP || g === PL ) && symbol.power === 1 ){
                symbol.group = FN;
                symbol.value = fn.value;
            }
            else {
                fn.group = FN;
                fn.symbols = Parser.addSymbol( symbol, {}, fn );
                symbol = fn;
            }
        }
        return symbol;
    }

    //checks if a number of symbol is negative;
    function isNeg( obj ) {
        if( isSymbol( obj ) ) {
            obj = obj.multiplier;
        }
        return obj < 0;
    }

    //this function doesn't do much other than carry parentheses
    function parens( symbol ) {
        return Parser.parse('parens'+inBrackets( text(symbol) ) );
    }

    function isReserved( value ) {
        if( RESERVED.indexOf( value ) !== -1) throw new Error( value+' is reserved!' );
        return false;
    }

    var userFuncs = function( str, subs, location, opt ) {
        var eq = opt === 'numer' ? numBlock(function(){
                return  Parser.parse( str, subs ) ;
            }) : Parser.parse( str, subs );
        if( location ) {
            EQNS[location-1] = eq;
        }
        else {
            EQNS.push( eq );
        }
        return eq;
    };

    userFuncs.version = function() {
        return version;
    };

    userFuncs.setConstant = function( constant, value ) {
        validateName( constant[0] );
        if( !isReserved( constant ) ) {
            if( value === 'delete' ) {
                delete constants[constant];
            }
            else {
                if( isNaN( value ) ) throw new Error('Constant must be a number!');
                constants[constant] =  value;
            }
        }

        return this;
    };

    userFuncs.buildFunction = Symbol.prototype.buildFunction = function( equationNumber, paramArray ) {
        var eq = EQNS[equationNumber -1] || this;
        return build( eq, paramArray );
    };

    //this does nothing more than create a named equation
    userFuncs.setFunction = function( name, params, fn ) {
        if( !isReserved( name ) ) {
            functions[name] = [ map, params.length, fn, params ];
            return true;
        }
        return false;
    };

    userFuncs.evaluate = function( subs ) {
        return this.getEquation().evaluate( subs );
    };

    userFuncs.clear = function( equationNumber, nochange ) {

        equationNumber = !equationNumber ? EQNS.length : equationNumber - 1;

        if( equationNumber === 'all' ) { EQNS = []; }
        else {
            nochange === true ? EQNS[equationNumber] = undefined : remove( EQNS, equationNumber );
        }
        return this;
    };

    userFuncs.getEquation = function( equationNumber, opt ) {
        equationNumber = equationNumber || EQNS.length;
        var eq = EQNS[equationNumber - 1];
        if( opt === 'latex' ) eq = Formatting.latex( eq );
        else if( opt === 'text' ) eq = eq.text();
        return eq;
    };

    userFuncs.setEquation = function( equationNumber, eq ) {
        if( equationNumber === undefined  ||equationNumber < 1 || isNaN( equationNumber ) ) {
            throw new Error( 'Not a valid equation number!' );
        }
        EQNS[ equationNumber - 1 ] = eq;
    };

    userFuncs.equations = function( asObject, asLatex ) {
        var result = asObject ? {} : [];
        for( var i=0; i<EQNS.length; i++ ) {
            var eq = asLatex ? Formatting.latex( EQNS[i] ) : text( EQNS[i] );
            if( asObject ) {
                result[i+1] = eq;
            }
            else {
                result.push( eq );
            }
        }
        return result;
    };

    userFuncs.reserved = function( asArray ) {
        if( asArray ){ return RESERVED; }
        return RESERVED.join(', ');
    };

    userFuncs.pRoots = function( str ) {
        return Algebra.pRoots( Parser.parse( str ) );
    };

    userFuncs.supported = function() {
        var funcs = keys(functions),
            exclude = ['parens'];
        for( var i=0;i<exclude.length;i++) {
            remove( funcs, funcs.indexOf( exclude[i]) );
        }
        return funcs;
    };

    userFuncs.validateName = validateName;

    userFuncs.expressions = userFuncs.equations;

    return userFuncs;

})( typeof nerdamerModules !== 'undefined' ? nerdamerModules : {} ); 
;

/*!
 * numeral.js
 * version : 1.5.3
 * author : Adam Draper
 * license : MIT
 * http://adamwdraper.github.com/Numeral-js/
 */
(function(){function a(a){this._value=a}function b(a,b,c,d){var e,f,g=Math.pow(10,b);return f=(c(a*g)/g).toFixed(b),d&&(e=new RegExp("0{1,"+d+"}$"),f=f.replace(e,"")),f}function c(a,b,c){var d;return d=b.indexOf("$")>-1?e(a,b,c):b.indexOf("%")>-1?f(a,b,c):b.indexOf(":")>-1?g(a,b):i(a._value,b,c)}function d(a,b){var c,d,e,f,g,i=b,j=["KB","MB","GB","TB","PB","EB","ZB","YB"],k=!1;if(b.indexOf(":")>-1)a._value=h(b);else if(b===q)a._value=0;else{for("."!==o[p].delimiters.decimal&&(b=b.replace(/\./g,"").replace(o[p].delimiters.decimal,".")),c=new RegExp("[^a-zA-Z]"+o[p].abbreviations.thousand+"(?:\\)|(\\"+o[p].currency.symbol+")?(?:\\))?)?$"),d=new RegExp("[^a-zA-Z]"+o[p].abbreviations.million+"(?:\\)|(\\"+o[p].currency.symbol+")?(?:\\))?)?$"),e=new RegExp("[^a-zA-Z]"+o[p].abbreviations.billion+"(?:\\)|(\\"+o[p].currency.symbol+")?(?:\\))?)?$"),f=new RegExp("[^a-zA-Z]"+o[p].abbreviations.trillion+"(?:\\)|(\\"+o[p].currency.symbol+")?(?:\\))?)?$"),g=0;g<=j.length&&!(k=b.indexOf(j[g])>-1?Math.pow(1024,g+1):!1);g++);a._value=(k?k:1)*(i.match(c)?Math.pow(10,3):1)*(i.match(d)?Math.pow(10,6):1)*(i.match(e)?Math.pow(10,9):1)*(i.match(f)?Math.pow(10,12):1)*(b.indexOf("%")>-1?.01:1)*((b.split("-").length+Math.min(b.split("(").length-1,b.split(")").length-1))%2?1:-1)*Number(b.replace(/[^0-9\.]+/g,"")),a._value=k?Math.ceil(a._value):a._value}return a._value}function e(a,b,c){var d,e,f=b.indexOf("$"),g=b.indexOf("("),h=b.indexOf("-"),j="";return b.indexOf(" $")>-1?(j=" ",b=b.replace(" $","")):b.indexOf("$ ")>-1?(j=" ",b=b.replace("$ ","")):b=b.replace("$",""),e=i(a._value,b,c),1>=f?e.indexOf("(")>-1||e.indexOf("-")>-1?(e=e.split(""),d=1,(g>f||h>f)&&(d=0),e.splice(d,0,o[p].currency.symbol+j),e=e.join("")):e=o[p].currency.symbol+j+e:e.indexOf(")")>-1?(e=e.split(""),e.splice(-1,0,j+o[p].currency.symbol),e=e.join("")):e=e+j+o[p].currency.symbol,e}function f(a,b,c){var d,e="",f=100*a._value;return b.indexOf(" %")>-1?(e=" ",b=b.replace(" %","")):b=b.replace("%",""),d=i(f,b,c),d.indexOf(")")>-1?(d=d.split(""),d.splice(-1,0,e+"%"),d=d.join("")):d=d+e+"%",d}function g(a){var b=Math.floor(a._value/60/60),c=Math.floor((a._value-60*b*60)/60),d=Math.round(a._value-60*b*60-60*c);return b+":"+(10>c?"0"+c:c)+":"+(10>d?"0"+d:d)}function h(a){var b=a.split(":"),c=0;return 3===b.length?(c+=60*Number(b[0])*60,c+=60*Number(b[1]),c+=Number(b[2])):2===b.length&&(c+=60*Number(b[0]),c+=Number(b[1])),Number(c)}function i(a,c,d){var e,f,g,h,i,j,k=!1,l=!1,m=!1,n="",r=!1,s=!1,t=!1,u=!1,v=!1,w="",x="",y=Math.abs(a),z=["B","KB","MB","GB","TB","PB","EB","ZB","YB"],A="",B=!1;if(0===a&&null!==q)return q;if(c.indexOf("(")>-1?(k=!0,c=c.slice(1,-1)):c.indexOf("+")>-1&&(l=!0,c=c.replace(/\+/g,"")),c.indexOf("a")>-1&&(r=c.indexOf("aK")>=0,s=c.indexOf("aM")>=0,t=c.indexOf("aB")>=0,u=c.indexOf("aT")>=0,v=r||s||t||u,c.indexOf(" a")>-1?(n=" ",c=c.replace(" a","")):c=c.replace("a",""),y>=Math.pow(10,12)&&!v||u?(n+=o[p].abbreviations.trillion,a/=Math.pow(10,12)):y<Math.pow(10,12)&&y>=Math.pow(10,9)&&!v||t?(n+=o[p].abbreviations.billion,a/=Math.pow(10,9)):y<Math.pow(10,9)&&y>=Math.pow(10,6)&&!v||s?(n+=o[p].abbreviations.million,a/=Math.pow(10,6)):(y<Math.pow(10,6)&&y>=Math.pow(10,3)&&!v||r)&&(n+=o[p].abbreviations.thousand,a/=Math.pow(10,3))),c.indexOf("b")>-1)for(c.indexOf(" b")>-1?(w=" ",c=c.replace(" b","")):c=c.replace("b",""),g=0;g<=z.length;g++)if(e=Math.pow(1024,g),f=Math.pow(1024,g+1),a>=e&&f>a){w+=z[g],e>0&&(a/=e);break}return c.indexOf("o")>-1&&(c.indexOf(" o")>-1?(x=" ",c=c.replace(" o","")):c=c.replace("o",""),x+=o[p].ordinal(a)),c.indexOf("[.]")>-1&&(m=!0,c=c.replace("[.]",".")),h=a.toString().split(".")[0],i=c.split(".")[1],j=c.indexOf(","),i?(i.indexOf("[")>-1?(i=i.replace("]",""),i=i.split("["),A=b(a,i[0].length+i[1].length,d,i[1].length)):A=b(a,i.length,d),h=A.split(".")[0],A=A.split(".")[1].length?o[p].delimiters.decimal+A.split(".")[1]:"",m&&0===Number(A.slice(1))&&(A="")):h=b(a,null,d),h.indexOf("-")>-1&&(h=h.slice(1),B=!0),j>-1&&(h=h.toString().replace(/(\d)(?=(\d{3})+(?!\d))/g,"$1"+o[p].delimiters.thousands)),0===c.indexOf(".")&&(h=""),(k&&B?"(":"")+(!k&&B?"-":"")+(!B&&l?"+":"")+h+A+(x?x:"")+(n?n:"")+(w?w:"")+(k&&B?")":"")}function j(a,b){o[a]=b}function k(a){var b=a.toString().split(".");return b.length<2?1:Math.pow(10,b[1].length)}function l(){var a=Array.prototype.slice.call(arguments);return a.reduce(function(a,b){var c=k(a),d=k(b);return c>d?c:d},-1/0)}var m,n="1.5.3",o={},p="en",q=null,r="0,0",s="undefined"!=typeof module&&module.exports;m=function(b){return m.isNumeral(b)?b=b.value():0===b||"undefined"==typeof b?b=0:Number(b)||(b=m.fn.unformat(b)),new a(Number(b))},m.version=n,m.isNumeral=function(b){return b instanceof a},m.language=function(a,b){if(!a)return p;if(a&&!b){if(!o[a])throw new Error("Unknown language : "+a);p=a}return(b||!o[a])&&j(a,b),m},m.languageData=function(a){if(!a)return o[p];if(!o[a])throw new Error("Unknown language : "+a);return o[a]},m.language("en",{delimiters:{thousands:",",decimal:"."},abbreviations:{thousand:"k",million:"m",billion:"b",trillion:"t"},ordinal:function(a){var b=a%10;return 1===~~(a%100/10)?"th":1===b?"st":2===b?"nd":3===b?"rd":"th"},currency:{symbol:"$"}}),m.zeroFormat=function(a){q="string"==typeof a?a:null},m.defaultFormat=function(a){r="string"==typeof a?a:"0.0"},"function"!=typeof Array.prototype.reduce&&(Array.prototype.reduce=function(a,b){"use strict";if(null===this||"undefined"==typeof this)throw new TypeError("Array.prototype.reduce called on null or undefined");if("function"!=typeof a)throw new TypeError(a+" is not a function");var c,d,e=this.length>>>0,f=!1;for(1<arguments.length&&(d=b,f=!0),c=0;e>c;++c)this.hasOwnProperty(c)&&(f?d=a(d,this[c],c,this):(d=this[c],f=!0));if(!f)throw new TypeError("Reduce of empty array with no initial value");return d}),m.fn=a.prototype={clone:function(){return m(this)},format:function(a,b){return c(this,a?a:r,void 0!==b?b:Math.round)},unformat:function(a){return"[object Number]"===Object.prototype.toString.call(a)?a:d(this,a?a:r)},value:function(){return this._value},valueOf:function(){return this._value},set:function(a){return this._value=Number(a),this},add:function(a){function b(a,b){return a+c*b}var c=l.call(null,this._value,a);return this._value=[this._value,a].reduce(b,0)/c,this},subtract:function(a){function b(a,b){return a-c*b}var c=l.call(null,this._value,a);return this._value=[a].reduce(b,this._value*c)/c,this},multiply:function(a){function b(a,b){var c=l(a,b);return a*c*b*c/(c*c)}return this._value=[this._value,a].reduce(b,1),this},divide:function(a){function b(a,b){var c=l(a,b);return a*c/(b*c)}return this._value=[this._value,a].reduce(b),this},difference:function(a){return Math.abs(m(this._value).subtract(a).value())}},s&&(module.exports=m),"undefined"==typeof ender&&(this.numeral=m),"function"==typeof define&&define.amd&&define([],function(){return m})}).call(this);;

(function(){
  var mod = angular.module('mathTag', []);
  var math = mathjs();
  function guid() {
    function s4() {
      return Math.floor((1 + Math.random()) * 0x10000)
                 .toString(16)
                 .substring(1);
    }
    return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
           s4() + '-' + s4() + s4() + s4();
  }

  function Attr(scope, elem, attrs, ctrl, mathbox, sel){
    function attr(name, bind, prop, fn, method){
      var obj = {};
      var method = method || 'animate';
      var duration = 1000;
      fn = fn || function(v){return v}

      //data bind: <curve ng-xxx>
      if(scope[attrs[bind]]){
        obj[name] = attrs[bind];
        scope.$watch(attrs[bind], function(v){
          obj[name] = fn(v);
          mathbox[method](sel, obj, {
            duration: duration,
          })
        })
        scope.$apply();
      //static ngModel: <curve>xxx
      }else if(bind === 'ngModel'){
        obj[name] = fn(elem.text());
        mathbox[method](sel, obj, {
          duration: duration,
        })
      }else if(attrs[name]){
        obj[name] = fn(attrs[name]);
        mathbox[method](sel, obj, {
          duration: duration,
        })
      }
    }
    attr.obj = function(v){
      return (typeof v === 'string')?JSON.parse(v):v;
    }
    attr.num = function(v){
      return Number(v)
    }
    attr.bool = function(v){
      return v===true||v==='true';
    }
    attr.color = function(v){
      return Number('0x'+(v||'000000'))
    }
    return attr;
  }

  var mathReady = (function mathReady(){
    var ready = false;
    var waiting = [];
    angular.element(document).ready(function() {
      ThreeBox.preload([
        '../vendor/snippets.glsl.html',
      ], function(){
        ready = true;
        waiting.forEach(function(cb){
          cb();
        })
      });
    });
    return function on(cb){
      ready?cb():waiting.push(cb);
    }
  }());

  mod.directive('mathBox', function($timeout){
    return {
      restrict: 'E',
      transclude: true,
      scope: {},
      template:
      '<div class="mathbox" ng-transclude>'+
      '</div>',
      link: function(scope, elem, attrs){
        mathReady(function(){
          linkMathBox(scope, elem, attrs);
          scope.ready();
        })
      },
      controller: function($scope){
        var waiting = [];
        var ready = false;
        $scope.ready = function(){
          ready = true;
          waiting.forEach(function(cb){
            cb($scope.mathbox());
          })
        }
        this.ready = function(cb){
          ready?cb():waiting.push(cb);
        };
      },
    }
  })

  mod.directive('curve', function(){
    return {
      restrict: 'EA',
      require: '^mathBox',
      link: function(scope, elem, attrs, mathBoxCtrl){
        elem.css('display', 'none');
        mathBoxCtrl.ready(function(mathbox){
          linkCurve(scope, elem, attrs, mathBoxCtrl, mathbox)
        });
      }
    }
  })

  mod.directive('vector', function(){
    return {
      restrict: 'EA',
      require: '^mathBox',
      link: function(scope, elem, attrs, ctrl){
        elem.css('display', 'none');
        ctrl.ready(function(mb){
          linkVector(scope, elem, attrs, ctrl, mb);
        })
      }
    }
  })

  mod.directive('surface', function(){
    return {
      restrict: 'EA',
      require: '^mathBox',
      link: function(scope, elem, attrs, ctrl){
        elem.css('display', 'none');
        ctrl.ready(function(mb){
          linkSurface(scope, elem, attrs, ctrl, mb);
        })
      }
    }
  })

  mod.directive('bezier', function(){
    return {
      restrict: 'EA',
      require: '^mathBox',
      link: function(scope, elem, attrs, ctrl){
        elem.css('display', 'none');
        ctrl.ready(function(mb){
          linkSurface(scope, elem, attrs, ctrl, mb);
        })
      }
    }
  })

  mod.directive('grid', function(){
    return {
      restrict: 'EA',
      require: '^mathBox',
      link: function(scope, elem, attrs, ctrl){
        elem.css('display', 'none');
        ctrl.ready(function(mb){
          linkGrid(scope, elem, attrs, ctrl, mb);
        })
      }
    }
  })

  mod.directive('axis', function(){
    return {
      restrict: 'E',
      require: '^mathBox',
      link: function(scope, elem, attrs, ctrl){
        elem.css('display', 'none');
        ctrl.ready(function(mb){
          linkAxis(scope, elem, attrs, ctrl, mb);
        })
      }
    }
  })

  function linkMathBox(scope, elem, attrs){
    var mathbox = mathBox(elem, {
      cursor:         true,
      elementResize:  true,
      fullscreen:     true,
      screenshot:     true,
      stats:          false,
      scale:          1,
    }).start();

    mathbox
      .viewport({
        type: 'cartesian',
        range: [[-10, 10], [-10, 10]],
        scale: [1, 1],
      })
      .transition(300)
    if(elem.find('axis').length){
    }else{
      mathbox.axis({
        axis: 0,
        lineWidth: 1,
      }).axis({
        axis: 1,
        lineWidth: 1,
      })
    }
    if(elem.find('camera').length){
    }else{
      mathbox.camera({
        orbit: 4,
        phi: τ/4,
        theta: 0,
        //lookAt: [0, 0],
      })
    }
    scope.mathbox = function(){
      return mathbox;
    }
  }

  function linkCurve(scope, elem, attrs, ctrl, mathbox){
    var id = guid()
    var attr = Attr(scope, elem, attrs, ctrl, mathbox, '#'+id);
    mathbox.curve({
      id: id,
      domain: [-5, 5],
    });

    //defaults
    attr('opacity', 'ngOpacity', 'opacity', attr.num);
    attr('lineWidth', 'ngLineWidth', 'lineWidth', attr.num)
    attr('pointSize', 'ngPointSize', 'pointSize', attr.num)
    attr('zIndex', 'ngZIndex', 'zIndex', attr.num);
    attr('color', 'ngColor', 'color', attr.color);

    attr('expression', 'ngModel', 'expression', function(v){
      return math.eval("f(x, i)=re("+v+')')
    })
    attr('n', 'ngN', 'n', attr.num)
    attr('line', 'ngLine', 'line', attr.bool)
    attr('points', 'ngPoints', 'points', attr.bool)
    attr('domain', 'ngDomain', 'domain', attr.obj);

  }

  function linkVector(scope, elem, attrs, ctrl, mathbox){
    var id = guid();
    var attr = Attr(scope, elem, attrs, ctrl, mathbox, '#'+id);
    mathbox.vector({
      id: id,
    })

    //defaults
    attr('opacity', 'ngOpacity', 'opacity', attr.num);
    attr('lineWidth', 'ngLineWidth', 'lineWidth', attr.num)
    attr('pointSize', 'ngPointSize', 'pointSize', attr.num)
    attr('zIndex', 'ngZIndex', 'zIndex', attr.num);
    attr('color', 'ngColor', 'color', attr.color);

    attr('n', 'ngN', 'n', attr.num)
    attr('expression', 'ngExpression', 'expression', function(v){
      return math.eval("f(x, i)=re("+v+')')
    })
    attr('data', 'ngModel', 'data', attr.obj)
    attr('line', 'ngLine', 'line', attr.bool)
    attr('points', 'ngPoints', 'points', attr.bool)
    attr('domain', 'ngDomain', 'domain', attr.obj);
    attr('arrow', 'ngArrow', 'arrow', attr.bool)
    attr('size', 'ngSize', 'size', attr.num);
  }

  function linkSurface(scope, elem, attrs, ctrl, mathbox){
    var id = guid();
    var attr = Attr(scope, elem, attrs, ctrl, mathbox, '#'+id);
    mathbox.surface({
      id: id
    });

    //defaults
    attr('opacity', 'ngOpacity', 'opacity', attr.num);
    attr('lineWidth', 'ngLineWidth', 'lineWidth', attr.num)
    attr('pointSize', 'ngPointSize', 'pointSize', attr.num)
    attr('zIndex', 'ngZIndex', 'zIndex', attr.num);
    attr('color', 'ngColor', 'color', attr.color);

    attr('n', 'ngN', 'n', attr.obj)
    attr('expression', 'ngExpression', 'expression', function(v){
      return math.eval("f(x, y, i, j)=re("+v+')')
    })
    attr('data', 'ngModel', 'data', attr.obj)
    attr('line', 'ngLine', 'line', attr.bool)
    attr('points', 'ngPoints', 'points', attr.bool)
    attr('domain', 'ngDomain', 'domain', attr.obj);
  }

  function linkBezier(scope, elem, attrs, ctrl, mathbox){
    var id = guid();
    var attr = Attr(scope, elem, attrs, ctrl, mathbox, '#'+id);
    mathbox.bezier({
      id: id
    });

    //defaults
    attr('opacity', 'ngOpacity', 'opacity', attr.num);
    attr('lineWidth', 'ngLineWidth', 'lineWidth', attr.num)
    attr('pointSize', 'ngPointSize', 'pointSize', attr.num)
    attr('zIndex', 'ngZIndex', 'zIndex', attr.num);
    attr('color', 'ngColor', 'color', attr.color);

    attr('n', 'ngN', 'n', function(v){
      return Number(v)
    })
    attr('domain', 'ngDomain', 'domain', attr.obj)
    attr('data', 'ngModel', 'data', attr.obj)
    attr('order', 'ngOrder', 'order', attr.num)
    attr('expression', 'ngExpression', 'expression', function(v){
      return math.eval("f(x, i)=re("+v+')');
    })
    attr('line', 'ngLine', 'line', attr.bool)
    attr('points', 'ngPoints', 'points', attr.bool)
  }

  function linkGrid(scope, elem, attrs, ctrl, mathbox){
    var id = guid();
    var attr = Attr(scope, elem, attrs, ctrl, mathbox, '#'+id);
    mathbox.grid({
      id: id
    });

    //defaults
    attr('opacity', 'ngOpacity', 'opacity', attr.num);
    attr('lineWidth', 'ngLineWidth', 'lineWidth', attr.num)
    attr('pointSize', 'ngPointSize', 'pointSize', attr.num)
    attr('zIndex', 'ngZIndex', 'zIndex', attr.num);
    attr('color', 'ngColor', 'color', attr.color);

    attr('axis', 'ngAxis', 'axis', attr.obj)
    attr('offset', 'ngOffset', 'offset', attr.obj)
    attr('show', 'ngShow', 'show', attr.obj)
    attr('ticks', 'ngTicks', 'ticks', attr.obj)
    attr('tickUnit', 'ngTickUnit', 'tickUnit', attr.obj)
    attr('tickScale', 'ngTickScale', 'tickScale', attr.obj)
  }

  function linkAxis(scope, elem, attrs, ctrl, mathbox){
    var id = guid();
    var attr = Attr(scope, elem, attrs, ctrl, mathbox, '#'+id);
    mathbox.axis({
      id: id
    });

    //defaults
    attr('opacity', 'ngOpacity', 'opacity', attr.num);
    attr('lineWidth', 'ngLineWidth', 'lineWidth', attr.num)
    attr('pointSize', 'ngPointSize', 'pointSize', attr.num)
    attr('zIndex', 'ngZIndex', 'zIndex', attr.num);
    attr('color', 'ngColor', 'color', attr.color);

    attr('axis', 'ngAxis', 'axis', attr.num, 'set');
    attr('offset', 'ngOffset', 'offset', attr.obj);
    attr('n', 'ngN', 'n', attr.num);
    attr('ticks', 'ngTicks', 'ticks', attr.num);
    attr('tickScale', 'ngTickScale', 'tickScale', attr.num);
    attr('arrow', 'ngArrow', 'arrow', attr.bool);
    attr('size', 'ngSize', 'size', attr.num)
  }

  function linkCamera(scope, elem, attrs, ctrl, mathbox){
    var id = guid();
    var attr = Attr(scope, elem, attrs, ctrl, mathbox, 'camera');
    /*mathbox.camera({
      orbit: 3,
      phi: τ/4,
      theta: 1,
    });*/

    attr('orbit', 'ngOrbit', 'orbit', attr.num);
    attr('phi', 'ngPhi', 'phi', attr.num);
    attr('theta', 'ngTheta', 'theta', attr.num);
    attr('lookAt', 'ngLookAt', 'lookAt', attr.obj);
  }
}())