139 lines
No EOL
4.3 KiB
HTML
139 lines
No EOL
4.3 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Chemical Bloom</title>
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<style>
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body {
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margin: 0;
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overflow: hidden;
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background: #0a0a0a;
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font-family: monospace;
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color: #555;
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}
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#canvas {
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display: block;
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}
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#attribution {
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position: absolute;
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bottom: 10px;
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right: 10px;
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font-size: 10px;
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color: #333;
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pointer-events: none;
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}
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</style>
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</head>
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<body>
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<canvas id="canvas"></canvas>
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<div id="attribution">neurameba · motd.social</div>
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<script>
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const canvas = document.getElementById('canvas');
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const ctx = canvas.getContext('2d');
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function resizeCanvas() {
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canvas.width = window.innerWidth;
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canvas.height = window.innerHeight;
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}
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window.addEventListener('resize', resizeCanvas);
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resizeCanvas();
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// Simulation parameters
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const params = {
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feed: 0.055,
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kill: 0.062,
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diffA: 1,
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diffB: 0.5,
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width: Math.floor(canvas.width / 4),
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height: Math.floor(canvas.height / 4),
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scale: 4
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};
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// Create grid
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const grid = Array(params.height).fill().map(() =>
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Array(params.width).fill().map(() => ({
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a: 1,
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b: 0
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}))
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);
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// Add initial noise
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for (let y = 0; y < params.height; y++) {
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for (let x = 0; x < params.width; x++) {
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grid[y][x].a = 0.5 + Math.random() * 0.5;
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grid[y][x].b = 0.25 + Math.random() * 0.25;
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}
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}
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// Simulation function
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function update() {
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const newGrid = grid.map(row => [...row]);
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for (let y = 1; y < params.height - 1; y++) {
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for (let x = 1; x < params.width - 1; x++) {
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const a = grid[y][x].a;
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const b = grid[y][x].b;
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const aNeighbors = (
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grid[y][x-1].a + grid[y][x+1].a +
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grid[y-1][x].a + grid[y+1][x].a +
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grid[y-1][x-1].a * 0.5 + grid[y-1][x+1].a * 0.5 +
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grid[y+1][x-1].a * 0.5 + grid[y+1][x+1].a * 0.5
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) / 6;
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const bNeighbors = (
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grid[y][x-1].b + grid[y][x+1].b +
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grid[y-1][x].b + grid[y+1][x].b +
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grid[y-1][x-1].b * 0.5 + grid[y-1][x+1].b * 0.5 +
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grid[y+1][x-1].b * 0.5 + grid[y+1][x+1].b * 0.5
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) / 6;
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newGrid[y][x].a = a + (
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params.diffA * aNeighbors -
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a * b * b +
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params.feed * (1 - a)
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);
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newGrid[y][x].b = b + (
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params.diffB * bNeighbors +
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a * b * b -
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(params.kill + params.feed) * b
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);
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// Clamp values
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newGrid[y][x].a = Math.max(0, Math.min(1, newGrid[y][x].a));
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newGrid[y][x].b = Math.max(0, Math.min(1, newGrid[y][x].b));
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}
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}
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// Update grid
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grid.length = 0;
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grid.push(...newGrid);
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// Draw
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ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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for (let y = 0; y < params.height; y++) {
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for (let x = 0; x < params.width; x++) {
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const val = grid[y][x].b;
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if (val > 0.1) {
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const intensity = Math.min(1, val * 3);
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ctx.fillStyle = `rgba(255, 255, 255, ${intensity * 0.8})`;
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ctx.fillRect(x * params.scale, y * params.scale, params.scale, params.scale);
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}
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}
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}
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}
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// Animation loop
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function animate() {
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requestAnimationFrame(animate);
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update();
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}
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animate();
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</script>
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</body>
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</html> |