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   "cell_type": "markdown",
   "id": "b0a16bcd-4ee4-435d-b045-cb2a9f62d966",
   "metadata": {},
   "source": [
    "# The Rock Cycle I: Introduction to Igneous Rocks"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "2b5627e5-a428-44fb-8dec-55e6744c7493",
   "metadata": {
    "tags": [
     "remove-input"
    ]
   },
   "outputs": [],
   "source": [
    "import os,re, IPython\n",
    "import plotly.express as px\n",
    "from skimage import io,color\n",
    "import numpy as np\n",
    "\n",
    "# Specify folder containing Slides*.png\n",
    "folder = 'Lecture8_TheRockCycleI-Intro-IgneousRocks'\n",
    "\n",
    "# create list of png files\n",
    "files = []\n",
    "for (roots,dirs,file) in os.walk(folder):\n",
    "    if roots==folder:\n",
    "        for f in file: \n",
    "            if f.endswith('.png') and f.startswith(folder): files.append(f)\n",
    "files.sort(key=lambda f: int(re.sub('\\D','',f))) # sort by number of slide\n",
    "\n",
    "num_slides = len(files)\n",
    "for slide, file in enumerate(files):\n",
    "    image_file = folder+'/'+file\n",
    "    img = io.imread(image_file)\n",
    "    if len(img.shape) == 2: img = color.gray2rgb(img) # convert b/w to rgb\n",
    "    \n",
    "    #slide_deck.shape (Nimg, y, x) for monochrome. (Nimg, y, x, 3) for RGB color.\n",
    "    if slide == 0: slide_deck = np.zeros([num_slides,img.shape[0],img.shape[1],img.shape[2]])\n",
    "    slide_deck[slide] = img\n",
    "    \n",
    "fig = px.imshow(slide_deck, animation_frame=0,binary_string=True, \n",
    "                binary_format='png', binary_compression_level=3,\n",
    "                width=img.shape[1], height=img.shape[0])\n",
    "fig.update_xaxes(showticklabels=False)\n",
    "fig.update_yaxes(showticklabels=False)\n",
    "fig.layout.updatemenus[0].buttons[0].args[1][\"frame\"][\"duration\"] = 2000\n",
    "fig.show()    "
   ]
  }
 ],
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