162 lines
5.8 KiB
HTML
162 lines
5.8 KiB
HTML
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```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>Neurameba · motd.social</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: '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: 10px;
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right: 10px;
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color: #333;
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font-size: 10px;
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text-shadow: 0 0 5px rgba(255,255,255,0.1);
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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 tuned for dryness/monochrome
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const params = {
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diffusionRateA: 1.0,
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diffusionRateB: 0.5,
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feedRate: 0.055,
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killRate: 0.062,
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timeStep: 1.0,
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gridWidth: 80,
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gridHeight: 45,
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cellSize: 8,
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decay: 0.99,
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palette: ['#111', '#222', '#333', '#444', '#555'],
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motion: 0.5,
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density: 0.5,
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paletteIndex: 0
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};
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// Initialize grids
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let grid = new Array(params.gridHeight);
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let nextGrid = new Array(params.gridHeight);
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for (let i = 0; i < params.gridHeight; i++) {
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grid[i] = new Array(params.gridWidth).fill(0);
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nextGrid[i] = new Array(params.gridWidth).fill(0);
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}
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// Initialize with sparse random patterns
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function initGrid() {
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for (let y = 0; y < params.gridHeight; y++) {
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for (let x = 0; x < params.gridWidth; x++) {
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grid[y][x] = Math.random() > 0.95 ? 1 : 0;
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}
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}
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}
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// React-diffuse step
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function reactDiffuse() {
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for (let y = 0; y < params.gridHeight; y++) {
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for (let x = 0; x < params.gridWidth; x++) {
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const a = grid[y][x];
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const b = grid[y][(x + 1) % params.gridWidth] +
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grid[y][(x - 1 + params.gridWidth) % params.gridWidth] +
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grid[(y + 1) % params.gridHeight][x] +
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grid[(y - 1 + params.gridHeight) % params.gridHeight][x];
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const laplacianA = (grid[(y + 1) % params.gridHeight][x] +
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grid[(y - 1 + params.gridHeight) % params.gridHeight][x] +
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grid[y][(x + 1) % params.gridWidth] +
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grid[y][(x - 1 + params.gridWidth) % params.gridWidth] -
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4 * a) / 4;
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const laplacianB = (nextGrid[(y + 1) % params.gridHeight][x] +
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nextGrid[(y - 1 + params.gridHeight) % params.gridHeight][x] +
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nextGrid[y][(x + 1) % params.gridWidth] +
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nextGrid[y][(x - 1 + params.gridWidth) % params.gridWidth] -
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4 * b) / 4;
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const reaction = a * b * b;
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const newA = a + (params.diffusionRateA * laplacianA - reaction + params.feedRate * (1 - a)) * params.timeStep;
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const newB = b + (params.diffusionRateB * laplacianB + reaction - (params.killRate + params.feedRate) * b) * params.timeStep;
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nextGrid[y][x] = Math.min(Math.max(newA, 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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// Apply decay to prevent perfect patterns
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for (let y = 0; y < params.gridHeight; y++) {
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for (let x = 0; x < params.gridWidth; x++) {
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grid[y][x] *= params.decay;
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}
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}
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}
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// Draw with variable palette based on parameters
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function draw() {
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const width = params.gridWidth * params.cellSize;
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const height = params.gridHeight * params.cellSize;
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for (let y = 0; y < params.gridHeight; y++) {
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for (let x = 0; x < params.gridWidth; x++) {
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const value = grid[y][x];
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if (value > 0.01) {
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const intensity = Math.min(value * 255, 255);
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ctx.fillStyle = params.palette[params.paletteIndex];
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ctx.globalAlpha = value;
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ctx.fillRect(x * params.cellSize, y * params.cellSize,
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params.cellSize, params.cellSize);
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}
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}
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}
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ctx.globalAlpha = 1;
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}
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// Animate and update parameters over time
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function animate() {
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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// Adjust parameters based on time
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const time = Date.now() * 0.0005;
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params.feedRate = 0.055 + Math.sin(time * 0.5) * 0.01;
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params.killRate = 0.062 + Math.cos(time * 0.3) * 0.01;
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// Occasionally change palette
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if (Math.random() < 0.002) {
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params.paletteIndex = Math.floor(Math.random() * params.palette.length);
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}
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reactDiffuse();
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draw();
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requestAnimationFrame(animate);
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}
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initGrid();
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animate();
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</script>
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</body>
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</html>
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```
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