//=============================================================================
// PD_QueueTweenAnimation.js
// ----------------------------------------------------------------------------
// (C)2016 PixelDOG
// This software is released under the MIT License.
// http://opensource.org/licenses/mit-license.php
//=============================================================================
/*:
@plugindesc Adds Tween animation functionality to Sprites and Windows.
@author Shio_inu
@url https://pixeldog.x.2nt.com/material_script.html
@license MIT License

@help
English Help Translator: munokura
This is an unofficial English translation of the plugin help,
created to support global RPG Maker users.
Feedback is welcome to improve translation quality
(see: https://github.com/munokura/PixelDOG-MV-plugins ).
Original plugin by Shio_inu.
Please check the latest official version at:
https://pixeldog.x.2nt.com/material_script.html
-----
Adds Tween animation functionality to Sprites and Windows.

last update: 2016/01/25 v1.01
*/


/*:ja
@plugindesc SpriteおよびWindowにTweenアニメーション機能を追加します。
@author しおいぬ

@help
SpriteおよびWindowにTweenアニメーション機能を追加します。

last update : 2016/01/25 v1.01
*/

var CURVE_EASE_IN_OUT = 0;
var CURVE_EASE_IN = 1;
var CURVE_EASE_OUT = 2;
var UNIFORM = 3;

var DST_ABSOLUTE = 0;
var DST_RELATIVE = 1;

function QueueTweenAnimation() {
    this.initialize.apply(this, arguments);
}
QueueTweenAnimation.prototype = Object.create(Object.prototype);
QueueTweenAnimation.prototype.constructor = QueueTweenAnimation;

QueueTweenAnimation.prototype.initialize = function (translate, scale, rotation, frame, curveType, coordinateType) {
    this._dstTranslate = translate;
    this._dstScale = scale;
    this._dstRotation = rotation;
    this._frameMax = frame;
    this._frame = 0;
    this._curveType = curveType;
    this._coordinateType = coordinateType;
};

QueueTweenAnimation.prototype.start = function (parent) {
    this._srcTranslate = new Point(parent.x, parent.y);
    if (this._coordinateType === DST_RELATIVE) {
        this._dstTranslate = new Point(parent.x + this._dstTranslate.x, parent.y + this._dstTranslate.y);
    }
    this._srcScale = parent.scale;
    this._srcRotation = parent.rotation;
};

QueueTweenAnimation.prototype.update = function (parent) {
    this._frame++;

    // 今どのくらい進んでるかを計算
    var framePer = this._frame / parseFloat(this._frameMax);

    var per = 0;

    // 元座標と移動先座標の何%の位置に配置されるかを計算
    switch (this._curveType) {
        case CURVE_EASE_IN_OUT:
            if (framePer > 0.5) {
                per = 0.5 + (Math.sin(Math.PI * (framePer - 0.5)) * 0.5);
            } else {
                per = (Math.sin(Math.PI * (-0.5 + framePer)) + 1) * 0.5;
            }
            break;
        case CURVE_EASE_IN:
            per = Math.sin(Math.PI * (-0.5 + (framePer / 2))) + 1;
            break;
        case CURVE_EASE_OUT:
            per = Math.sin(Math.PI / 2 * framePer);
            break;
        case UNIFORM:
            per = framePer;
            break;
        default:
            per = framePer;
            break;
    }
    //実際に移動

    parent.x = this._srcTranslate.x + ((this._dstTranslate.x - this._srcTranslate.x) * per);
    parent.y = this._srcTranslate.y + ((this._dstTranslate.y - this._srcTranslate.y) * per);
    console.log("move : " + this._frame);
    if (parent.scale) {
        parent.scale = new Point(this._srcScale.x + ((this._dstScale.x - this._srcScale.x) * per),
            this._srcScale.y + ((this._dstScale.y - this._srcScale.y) * per));
        parent.rotation = this._srcRotation + ((this._dstRotation - this._srcRotation) * per);
    }
};

QueueTweenAnimation.prototype.isStarted = function () {
    return (this._frame != 0) ? true : false;
}

QueueTweenAnimation.prototype.isEnd = function () {
    return (this._frame == this._frameMax) ? true : false;
}

//-----------------------------------------------------------------------------
// Sprite
//

Sprite.prototype.addAnimation = function (animation) {
    if (!this._animationStack) {
        this._animationStack = [];
    }
    this._animationStack.push(animation)
};

Sprite.prototype.deleteAllAnimations = function () {
    this._animationStack = [];
};

var updateSprite = Sprite.prototype.update;
Sprite.prototype.update = function () {
    if (this._animationStack) {
        if (this._animationStack.length != 0) {
            if (!this._animationStack[0].isStarted()) {
                this._animationStack[0].start(this);
            }
            this._animationStack[0].update(this);
            if (this._animationStack[0].isEnd()) {
                this._animationStack.shift();
            }
        }
    }
    updateSprite.call(this);
};

//-----------------------------------------------------------------------------
// Window
//

Window.prototype.addAnimation = function (animation) {
    if (!this._animationStack) {
        this._animationStack = [];
    }
    this._animationStack.push(animation)
};

Window.prototype.deleteAllAnimations = function () {
    this._animationStack = [];
};

var updateWindow = Window.prototype.update;
Window.prototype.update = function () {
    if (this._animationStack) {
        if (this._animationStack.length != 0) {
            if (!this._animationStack[0].isStarted()) {
                this._animationStack[0].start(this);
            }
            this._animationStack[0].update(this);
            if (this._animationStack[0].isEnd()) {
                this._animationStack.shift();
            }
        }
    }
    updateWindow.call(this);
};