135 lines
No EOL
4 KiB
HTML
135 lines
No EOL
4 KiB
HTML
```html
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<!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>Teal Nebula</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-color: #0a0a1a;
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display: flex;
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justify-content: center;
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align-items: center;
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height: 100vh;
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font-family: 'Courier New', monospace;
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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: 20px;
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color: #77aaff;
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font-size: 10px;
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text-align: center;
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width: 100%;
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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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// Reaction-diffusion 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: 1.0,
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diffB: 0.5,
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scale: 120,
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pixelSize: 1
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};
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// Initialize grids
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let grid = Array(canvas.height).fill().map(() =>
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Array(canvas.width).fill().map(() => Math.random() * 0.2)
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);
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let nextGrid = Array(canvas.height).fill().map(() =>
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Array(canvas.width).fill(0)
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);
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// Reaction-diffusion simulation
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function update() {
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for (let y = 1; y < canvas.height - 1; y++) {
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for (let x = 1; x < canvas.width - 1; x++) {
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const a = grid[y][x];
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const b = nextGrid[y][x];
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// Calculate Laplacian
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const aLap = (
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grid[y-1][x] + grid[y+1][x] +
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grid[y][x-1] + grid[y][x+1] -
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4 * a
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) * params.diffA;
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const bLap = (
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nextGrid[y-1][x] + nextGrid[y+1][x] +
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nextGrid[y][x-1] + nextGrid[y][x+1] -
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4 * b
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) * params.diffB;
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// Reaction terms
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const reaction = a * b * b;
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const aNew = a + (aLap * params.feed) - reaction;
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const bNew = b + (bLap * params.kill) + reaction;
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// Clamp and store
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nextGrid[y][x] = Math.min(Math.max(bNew, 0), 1);
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grid[y][x] = Math.min(Math.max(aNew, 0), 1);
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}
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}
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// Swap grids
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[grid, nextGrid] = [nextGrid, grid];
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}
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// Drawing function
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function draw() {
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ctx.fillStyle = '#0a0a1a';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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const imageData = ctx.createImageData(canvas.width, canvas.height);
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const data = imageData.data;
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for (let y = 0; y < canvas.height; y++) {
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for (let x = 0; x < canvas.width; x++) {
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const val = grid[y][x];
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const idx = (y * canvas.width + x) * 4;
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// Teal color scheme for curiosity
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data[idx] = Math.min(255, val * 255 * 2); // R (low)
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data[idx+1] = Math.min(255, val * 255 * 1.8); // G (medium)
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data[idx+2] = Math.min(255, val * 255 * 2.2); // B (high)
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data[idx+3] = 255;
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}
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}
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ctx.putImageData(imageData, 0, 0);
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}
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// Animation loop
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function animate() {
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update();
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draw();
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requestAnimationFrame(animate);
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}
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animate();
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</script>
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</body>
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</html>
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``` |