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plotter_experiments/perlin_landscape.ipynb

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Add 2D noise-based landscape plots
2022-12-11 16:48:54 +01:00
{
"cells": [
{
"cell_type": "code",
"execution_count": 9,
"metadata": {},
"outputs": [],
"source": [
"import numpy as np\n",
Remove stray unused import
2022-12-11 17:37:59 +01:00
"from lib import plot\n",
Add 2D noise-based landscape plots
2022-12-11 16:48:54 +01:00
"import IPython\n",
"import noise"
]
},
{
"cell_type": "code",
"execution_count": 10,
"metadata": {},
"outputs": [
{
"data": {
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"text/plain": [
"<IPython.core.display.SVG object>"
]
},
"execution_count": 10,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"paper = plot.A6_PORTRAIT\n",
"p_svg = plot.SVGPlotter('plots/landscape.svg', paper)\n",
"p_hpgl = plot.HPGLPlotter(paper, 'plots/landscape_{index}.hpgl')\n",
"plotter = plot.MultiPlotter()\n",
"plotter.register_plotter(p_svg)\n",
"plotter.register_plotter(p_hpgl)\n",
"\n",
"plotter.move_to(paper.bottom_left())\n",
"plotter.line_to(paper.bottom_right())\n",
"plotter.line_to(paper.top_right())\n",
"plotter.line_to(paper.top_left())\n",
"plotter.line_to(paper.bottom_left())\n",
"\n",
"centre = paper.centre()\n",
"\n",
"shape = (100, 21)\n",
"scale = .6\n",
"octaves = 6\n",
"persistence = 0.4\n",
"lacunarity = 1.8\n",
"seed = np.random.randint(0, 100)\n",
"\n",
"world = np.zeros(shape)\n",
"\n",
"x_idx = np.linspace(0, 1, shape[0])\n",
"y_idx = np.linspace(0, 1, shape[1])\n",
"world_x, world_y = np.meshgrid(x_idx, y_idx)\n",
"\n",
"world = np.vectorize(noise.pnoise2)(world_x / scale,\n",
" world_y / scale,\n",
" octaves=octaves,\n",
" persistence=persistence,\n",
" lacunarity=lacunarity,\n",
" repeatx=1024,\n",
" repeaty=1024,\n",
" base=seed)\n",
"\n",
"def tf(coord):\n",
" return paper.width * 0.75 * (np.array(coord) - [0.5, 0.5]) + centre\n",
"\n",
"for i in reversed(range(len(y_idx) - 1)):\n",
" world[i, :] = np.min([world[i, :], world[i + 1, :] - (y_idx[0] - y_idx[1])], axis=0)\n",
"\n",
"for i, y in enumerate(y_idx):\n",
" plotter.move_to(tf((0, y + world[i, 0])))\n",
" for j, x in enumerate(x_idx[1:]):\n",
" plotter.line_to(tf((x, y + world[i, j])))\n",
"\n",
"plotter.finalise()\n",
"\n",
"IPython.display.SVG(filename=p_svg.file_name)"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3.9.15 64-bit",
"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": "3.9.15"
},
"orig_nbformat": 4,
"vscode": {
"interpreter": {
"hash": "1dc4d77b1edb83bef89f833b7ed5251134c6a4899ef5e2c90c44e9927b4ae63a"
}
}
},
"nbformat": 4,
"nbformat_minor": 2
}
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