{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div id=\"scene0\"><div id=\"glowscript\" class=\"glowscript\"></div></div>"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "require.undef(\"nbextensions/glow.1.0.min\");"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "require.undef(\"nbextensions/jquery-ui.custom.min\");"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "require.undef(\"nbextensions/glow.1.1.min\");"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "require.undef(\"nbextensions/glowcomm\");"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "require([\"nbextensions/glowcomm\"], function(){console.log(\"glowcomm loaded\");})"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "# pip install ivisual\n",
    "from ivisual import *"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 67,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div id=\"scene14\"><div id=\"glowscript\" class=\"glowscript\"></div></div>"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "window.__context = { glowscript_container: $(\"#glowscript\").removeAttr(\"id\")}"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "<div id=\"glowscript2\" ><div id=\"glowscript\" class=\"glowscript\"></div></div>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "canvas(width=900, height=400)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 68,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "earth = sphere(radius = 6371, color=color.blue)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 69,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "moon_earth_dist = 50000\n",
    "moon = sphere(radius = 1737, pos=(moon_earth_dist, 0, 0), color=color.gray(0.7))\n",
    "sat_earth_dist = 15000\n",
    "sat = box(width=1000, height=1000, length=1000, pos=(sat_earth_dist, 0, 0), color=color.white)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "r = moon_earth_dist\n",
    "r2 = sat_earth_dist\n",
    "for _ in range(100):\n",
    "    for theta in np.linspace(0, 2*np.pi):\n",
    "        rate(24)\n",
    "        x = r*np.cos(theta)\n",
    "        y = r*np.sin(theta)\n",
    "        assert np.allclose(x**2+y**2, r, x**2+y**2)\n",
    "        moon.pos = (x, y, 0)\n",
    "        x = r2*np.cos(theta*4)\n",
    "        y = r2*np.sin(theta*4)\n",
    "        sat.pos = (0, x, y)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
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   "file_extension": ".py",
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   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.4.3"
  }
 },
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}