149 lines
No EOL
5.1 KiB
HTML
149 lines
No EOL
5.1 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>Gray 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: #000;
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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: Arial, sans-serif;
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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: fixed;
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bottom: 10px;
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left: 50%;
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transform: translateX(-50%);
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color: #555;
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font-size: 12px;
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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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// Parameters derived from abstract specifications
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const params = {
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motion: 0.5,
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density: 0.5,
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complexity: 0.5,
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connectedness: 0.5,
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lifespan: 0.5,
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pulse: { avg: 1.08, min: 1.05, max: 1.10 },
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tone: { anger: 0, sadness: 0, curiosity: 0.2, dryness: 0.8, playfulness: 0, tension: 0 }
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};
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// Reaction-diffusion simulation constants
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const W = canvas.width;
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const H = canvas.height;
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const SIZE = 2; // size of each cell
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const WIDTH = Math.floor(W / SIZE);
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const HEIGHT = Math.floor(H / SIZE);
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// Initialize fields
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let current = new Float32Array(WIDTH * HEIGHT * 4);
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let next = new Float32Array(WIDTH * HEIGHT * 4);
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// Fill with random values
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for (let i = 0; i < current.length; i += 4) {
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current[i] = 0.5 + (Math.random() * 0.1 - 0.05); // A
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current[i+1] = 0.5 + (Math.random() * 0.1 - 0.05); // B
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current[i+2] = 0; // C
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current[i+3] = 0; // D
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}
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// Simulation parameters
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const Da = 1.0;
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const Db = 0.5;
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const f = 0.055 + (params.complexity * 0.045); // feed rate
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const k = 0.062 + (params.connectedness * 0.038); // kill rate
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const feedRate = () => f + (Math.sin(Date.now() * 0.001) * 0.01 * params.pulse.avg);
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function update() {
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const t = Date.now() * 0.001 * params.motion;
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for (let x = 1; x < WIDTH - 1; x++) {
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for (let y = 1; y < HEIGHT - 1; y++) {
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const i = (x + y * WIDTH) * 4;
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// Get neighbors
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const iN = ((x) + (y-1) * WIDTH) * 4;
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const iS = ((x) + (y+1) * WIDTH) * 4;
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const iE = ((x+1) + (y) * WIDTH) * 4;
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const iW = ((x-1) + (y) * WIDTH) * 4;
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const iNW = ((x-1) + (y-1) * WIDTH) * 4;
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const iNE = ((x+1) + (y-1) * WIDTH) * 4;
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const iSW = ((x-1) + (y+1) * WIDTH) * 4;
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const iSE = ((x+1) + (y+1) * WIDTH) * 4;
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const A = current[i];
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const B = current[i+1];
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// Laplacian
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const lapA = (current[iN] + current[iS] + current[iE] + current[iW] +
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current[iNW] + current[iNE] + current[iSW] + current[iSE] - 8 * A) / 8;
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const lapB = (current[iN+1] + current[iS+1] + current[iE+1] + current[iW+1] +
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current[iNW+1] + current[iNE+1] + current[iSW+1] + current[iSE+1] - 8 * B) / 8;
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// Reaction terms
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const reactA = A * B * B;
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const reactB = A * B;
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// Update
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next[i] = A + (Da * lapA - reactA + feedRate()) * SIZE;
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next[i+1] = B + (Db * lapB + reactA - reactB) * SIZE;
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next[i+2] = 0;
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next[i+3] = 0;
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}
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}
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// Swap buffers
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[current, next] = [next, current];
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// Render
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ctx.clearRect(0, 0, W, H);
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for (let x = 0; x < WIDTH; x++) {
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for (let y = 0; y < HEIGHT; y++) {
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const i = (x + y * WIDTH) * 4;
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const val = current[i+1]; // B value
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if (val > 0.1 && val < 0.9) {
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const size = SIZE * 2 * (1 - params.tone.dryness);
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const hue = 200 + (val * 120);
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const sat = 50 + (params.tone.curiosity * 50);
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const bri = 10 + (val * 80);
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ctx.fillStyle = `hsl(${hue}, ${sat}%, ${bri}%)`;
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ctx.fillRect(x * SIZE, y * SIZE, size, size);
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}
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}
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}
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requestAnimationFrame(update);
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}
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update();
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</script>
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</body>
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</html> |