{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import random\n",
    "import os\n",
    "import os.path\n",
    "import sys\n",
    "\n",
    "from OCC.STEPControl import STEPControl_Reader\n",
    "from OCC.IFSelect import IFSelect_RetDone, IFSelect_ItemsByEntity\n",
    "\n",
    "sys.path.append('..')\n",
    "from core_topology_traverse import Topo"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from OCC.Display.WebGl.jupyter_renderer import JupyterRenderer, format_color"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def read_step_file(filename):\n",
    "    \"\"\" read the STEP file and returns a compound\n",
    "    \"\"\"\n",
    "    step_reader = STEPControl_Reader()\n",
    "    status = step_reader.ReadFile(filename)\n",
    "\n",
    "    if status == IFSelect_RetDone:  # check status\n",
    "        failsonly = False\n",
    "        step_reader.PrintCheckLoad(failsonly, IFSelect_ItemsByEntity)\n",
    "        step_reader.PrintCheckTransfer(failsonly, IFSelect_ItemsByEntity)\n",
    "\n",
    "        ok = step_reader.TransferRoot(1)\n",
    "        _nbs = step_reader.NbShapes()\n",
    "        aResShape = step_reader.Shape(1)\n",
    "    else:\n",
    "        print(\"Error: can't read file.\")\n",
    "        sys.exit(0)\n",
    "    return aResShape\n",
    "\n",
    "shp = read_step_file(os.path.join('..', 'models', 'RC_Buggy_2_front_suspension.stp'))  # this is a compound"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "my_renderer = JupyterRenderer(size=(700, 700))\n",
    "my_renderer.Display()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# loop over subshapes so that each subshape is meshed/displayed\n",
    "t = Topo(shp)\n",
    "from random import randint\n",
    "for solid in t.solids():\n",
    "    random_color = format_color(randint(0,255), randint(0,255), randint(0,255))\n",
    "    my_renderer.DisplayShape(solid, shape_color=random_color)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.4"
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 },
 "nbformat": 4,
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}