145 lines
No EOL
4.5 KiB
HTML
145 lines
No EOL
4.5 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>Dissolving Memory</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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left: 10px;
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color: #333;
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font-size: 10px;
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mix-blend-mode: difference;
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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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timeStep: 1.0,
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diffusionRateA: 1.0,
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diffusionRateB: 0.5,
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scale: 1.0,
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decay: 0.01,
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motion: 0.5
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};
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// Initialize cells
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const gridSize = 8;
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const cols = Math.floor(canvas.width / gridSize) + 2;
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const rows = Math.floor(canvas.height / gridSize) + 2;
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const current = new Array(cols * rows).fill(0);
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const next = new Array(cols * rows).fill(0);
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// Initialize with sparse noise
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function init() {
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for (let i = 0; i < current.length; i++) {
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current[i] = Math.random() > 0.9 ? 1 : 0;
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}
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}
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init();
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function update() {
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for (let y = 1; y < rows - 1; y++) {
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for (let x = 1; x < cols - 1; x++) {
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const idx = x + y * cols;
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// Moore neighborhood
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const a = current[idx];
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const aNeighbors = [
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current[idx - 1 - cols],
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current[idx - cols],
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current[idx + 1 - cols],
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current[idx - 1],
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current[idx + 1],
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current[idx - 1 + cols],
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current[idx + cols],
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current[idx + 1 + cols]
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].reduce((sum, val) => sum + val, 0);
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// Gray-Scott reaction
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const b = 1 - a;
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const reaction = a * b * b;
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next[idx] = current[idx] +
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params.timeStep * (
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params.diffusionRateA * aNeighbors +
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-reaction * params.feed +
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reaction * params.kill +
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-params.decay * current[idx]
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);
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// Clamp values
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next[idx] = Math.max(0, Math.min(1, next[idx]));
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}
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}
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// Swap buffers and add motion
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for (let i = 0; i < current.length; i++) {
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const delta = next[i] - current[i];
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current[i] = next[i] + params.motion * delta * (Math.random() * 0.5 + 0.5);
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next[i] = 0;
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}
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}
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function draw() {
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ctx.fillStyle = 'rgba(0, 0, 0, 0.1)';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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for (let y = 1; y < rows - 1; y++) {
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for (let x = 1; x < cols - 1; x++) {
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const idx = x + y * cols;
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const val = current[idx];
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if (val > 0.1) {
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const size = gridSize * (0.2 + 0.8 * val);
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const alpha = 0.3 + 0.7 * val;
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ctx.fillStyle = `rgba(200, 200, 200, ${alpha})`;
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ctx.fillRect(
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x * gridSize - gridSize/2,
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y * gridSize - gridSize/2,
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size, size
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);
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}
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}
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}
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}
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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> |