{
"metadata": {
"name": "ipythonblocks_animation"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Animation with ipythonblocks"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"For more on `ipythonblocks` see the home page at [https://github.com/jiffyclub/ipythonblocks](https://github.com/jiffyclub/ipythonblocks)."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from ipythonblocks import BlockGrid"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 1
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import time\n",
"from IPython.display import clear_output"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 2
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"It's possible to do animation of sorts using IPython's `clear_output` function."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"grid = BlockGrid(3, 3)\n",
"\n",
"previous_block = None\n",
"\n",
"for block in grid:\n",
" clear_output()\n",
" block.green = 255\n",
" \n",
" if previous_block:\n",
" previous_block.green = 0\n",
" \n",
" grid.show()\n",
" \n",
" previous_block = block\n",
" \n",
" time.sleep(0.2)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"html": [
""
],
"output_type": "display_data",
"text": [
""
]
}
],
"prompt_number": 3
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"And this is so much fun that it's been added to `ipythonblocks`: one way is to use the `BlockGrid.animate()` method. The `.animate()` method takes\n",
"an optional `stop_time` keyword to control the amount of time between loop steps."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"grid = BlockGrid(3, 3)\n",
"\n",
"previous_block = None\n",
"\n",
"for block in grid.animate():\n",
" block.green = 255\n",
" \n",
" if previous_block:\n",
" previous_block.green = 0\n",
" \n",
" previous_block = block"
],
"language": "python",
"metadata": {},
"outputs": [
{
"html": [
""
],
"output_type": "display_data",
"text": [
""
]
}
],
"prompt_number": 4
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"And another way, if not iterating over the grid, is to use the `BlockGrid.flash()` method. `.flash()` takes an optional `display_time` keyword that\n",
"controls for how long each frame is displayed. The default is 0.2 seconds."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"grid = BlockGrid(3, 3)\n",
"\n",
"previous_block = None\n",
"\n",
"indices = [[(0, 0), (0, 2), (2, 0), (2, 2)], [(0, 1), (1, 0), (1, 2), (2, 1)]] * 10\n",
"\n",
"for ind in indices:\n",
" for i in ind:\n",
" grid[i[0], i[1]].green = 255\n",
" \n",
" grid.flash(display_time=0.1)\n",
" \n",
" for i in ind:\n",
" grid[i[0], i[1]].green = 0\n",
"\n",
"grid.show()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"html": [
""
],
"output_type": "display_data",
"text": [
""
]
}
],
"prompt_number": 5
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}