{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import k3d\n",
    "import numpy as np\n",
    "\n",
    "plot = k3d.plot()\n",
    "\n",
    "o = np.stack([np.linspace(0,2,50),np.zeros(50),np.zeros(50)]).T.astype(np.float32)\n",
    "v = np.random.randn(50,3).astype(np.float32)\n",
    "vectors = k3d.vectors(o,v)\n",
    "plot += vectors\n",
    "\n",
    "plot.display()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# That will throw a error. \n",
    "# vectors.origins = o[::2]\n",
    "# vectors.vectors = v[::2]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "with vectors.hold_sync():\n",
    "    vectors.origins = o[::2]\n",
    "    vectors.vectors = v[::2]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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