159 lines
No EOL
5.1 KiB
HTML
159 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>Strange Attractor</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: #0a0a0a;
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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: 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: fixed;
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bottom: 10px;
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right: 10px;
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color: rgba(255, 255, 255, 0.5);
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font-size: 10px;
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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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const params = {
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motion: 0.472,
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density: 0.502,
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complexity: 0.481,
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connectedness: 0.541,
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lifespan: 0.495,
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pulse: { avg: 0.63, min: 0.30, max: 1.65 }
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};
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const colors = {
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background: '#0a0a0a',
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base: '#5a6f7a',
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highlight: '#a8c3d8',
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accent: '#4a8a9a'
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};
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// Strange attractor parameters (Lorenz-like system with noise)
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const attractor = {
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a: 10 * params.motion + 5,
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b: 28 * (1 - params.connectedness),
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c: 8.0 / 3.0,
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scale: 5 * (1 + params.density),
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offsetX: canvas.width / 2,
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offsetY: canvas.height / 2,
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rotation: 0,
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noiseScale: params.complexity * 0.3,
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timeStep: 0.01 * (0.5 + params.motion)
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};
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let points = [];
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const pointCount = 5000 * params.density;
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let trails = [];
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// Initialize points in a small cluster
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for (let i = 0; i < pointCount; i++) {
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trails.push({
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history: [],
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maxLength: 50 + Math.floor(params.lifespan * 100),
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energy: params.pulse.avg,
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hue: 180 + (Math.random() * 60),
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saturation: 50 + Math.random() * 50,
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lightness: 40 + Math.random() * 20
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});
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}
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function updateAttractor() {
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attractor.rotation += params.motion * 0.002;
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attractor.offsetX = canvas.width / 2 + Math.sin(Date.now() * 0.0005) * 100;
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attractor.offsetY = canvas.height / 2 + Math.cos(Date.now() * 0.0003) * 50;
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}
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function attractorStep(x, y, z) {
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const dt = attractor.timeStep;
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const a = attractor.a;
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const b = attractor.b;
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const c = attractor.c;
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const dx = a * (y - x) * dt;
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const dy = (x * (b - z) - y) * dt;
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const dz = (x * y - c * z) * dt;
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const noiseX = (Math.random() - 0.5) * attractor.noiseScale;
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const noiseY = (Math.random() - 0.5) * attractor.noiseScale;
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const noiseZ = (Math.random() - 0.5) * attractor.noiseScale;
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return {
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x: x + dx + noiseX,
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y: y + dy + noiseY,
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z: z + dz + noiseZ
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};
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}
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function draw() {
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ctx.fillStyle = colors.background;
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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updateAttractor();
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trails.forEach((trail, i) => {
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const x0 = canvas.width * 0.3 + Math.sin(i * 0.1) * canvas.width * 0.7;
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const y0 = canvas.height * 0.3 + Math.cos(i * 0.13) * canvas.height * 0.7;
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const z0 = Date.now() * 0.001 + i * 0.1;
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const newPoint = attractorStep(x0, y0, z0);
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trail.history.push({ x: newPoint.x, y: newPoint.y });
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if (trail.history.length > trail.maxLength) {
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trail.history.shift();
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}
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// Draw trail with decreasing opacity
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const opacity = 1 - trail.history.length / trail.maxLength;
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ctx.strokeStyle = `hsla(${trail.hue}, ${trail.saturation}%, ${trail.lightness}%, ${opacity * 0.8})`;
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ctx.lineWidth = 1 + trail.energy * 0.5;
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ctx.beginPath();
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trail.history.forEach((point, j) => {
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const px = attractor.offsetX + point.x * attractor.scale;
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const py = attractor.offsetY + point.y * attractor.scale;
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if (j === 0) {
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ctx.moveTo(px, py);
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} else {
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ctx.lineTo(px, py);
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}
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});
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ctx.stroke();
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});
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requestAnimationFrame(draw);
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}
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draw();
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</script>
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</body>
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</html> |