{
 "cells": [
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   "execution_count": 1,
   "metadata": {
    "scrolled": true
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   "outputs": [
    {
     "data": {
      "application/javascript": [
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       "if (typeof Jupyter !== \"undefined\") {require.undef(\"nbextensions/vpython_libraries/jquery-ui.custom.min\");}else{element.textContent = ' ';}"
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      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "if (typeof Jupyter !== \"undefined\") {require([\"nbextensions/vpython_libraries/glow.min\"], function(){console.log(\"GLOW LOADED\");});}else{element.textContent = ' ';}"
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      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "if (typeof Jupyter !== \"undefined\") {require([\"nbextensions/vpython_libraries/jquery-ui.custom.min\"], function(){console.log(\"JQUERY LOADED\");});}else{element.textContent = ' ';}"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "<div id=\"glowscript\" class=\"glowscript\"></div>"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
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    {
     "data": {
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    }
   ],
   "source": [
    "# PHY 342, J Wang\n",
    "# Vector angular precession model\n",
    "from vpython import *"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "xaxis = arrow(axis=vector(1,0,0))\n",
    "yaxis = arrow(axis=vector(0,1,0))\n",
    "angmom = arrow(axis=vector(1,1,0), color=color.green, make_trail=True)\n",
    "circle = ring(pos=vector(0,1,0),axis=vector(0,1,0),thickness=0.02)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "while True:\n",
    "    rate(10)\n",
    "    angmom.rotate(axis=vector(0,1,0), angle=pi/16)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "angmom.axis = vector(1,-1,0)\n",
    "circle.pos.y = -1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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