2train.ipynb~

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   "source": [
    "import numpy as np\n",
    "from matplotlib import pyplot as plt\n",
    "import matplotlib.patches as patches\n",
    "from matplotlib import animation\n",
    "from IPython.display import HTML"
   ]
  },
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    "fig = plt.figure()\n",
    "fig.set_size_inches(12,2)\n",
    "\n",
    "d=50\n",
    "x1, x2 = -10, d\n",
    "v1 = 5\n",
    "a = 0\n",
    "v2 = 9\n",
    "dt = 0.1\n",
    "a1 = 0\n",
    "\n",
    "ax = plt.axes(xlim=(-10, 200), ylim=(-4, 20))\n",
    "t1 = plt.text(-x1, 0., \"train1\", size=10,\n",
    "         bbox=dict(boxstyle=\"round\",\n",
    "                   ec=(1., 0.5, 0.5),\n",
    "                   fc=(1., 0, 0),\n",
    "                   )\n",
    "         )\n",
    "t2 = plt.text(x2, 0., \"train2\", size=10,\n",
    "         bbox=dict(boxstyle=\"round\",\n",
    "                   ec=(0., 1, 0.5),\n",
    "                   fc=(0.,1, 0),\n",
    "                   )\n",
    "         )\n",
    "plt.plot([0, 200],[0, 0], lw =2 ,c = 'k')\n",
    "\n",
    "def init():\n",
    "    \n",
    "    return [t1, t2]\n",
    "\n",
    "\n",
    "def animate(i):\n",
    "    global x1, x2, v1, a\n",
    "    v1 += a * dt\n",
    "    x1 += v1 * dt\n",
    "    x2 += v2 *dt\n",
    "    t1.set_x(x1)\n",
    "    t2.set_x(x2)\n",
    "    return [t1,t2]\n"
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   "source": [
    "d=50\n",
    "x1, x2 = -10, d\n",
    "v1 = 10\n",
    "a = -0.25\n",
    "v2 = 5\n",
    "dt = 0.1\n",
    "a1 = 0\n",
    "\n",
    "\n",
    "anim = animation.FuncAnimation(fig, animate, \n",
    "                               init_func=init, \n",
    "                               frames=200, \n",
    "                               interval=20,\n",
    "                               blit=True)\n",
    "HTML(anim.to_html5_video())"
   ]
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