112 lines
No EOL
3.1 KiB
HTML
112 lines
No EOL
3.1 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 Dance</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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color: #888;
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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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left: 20px;
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font-size: 10px;
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opacity: 0.5;
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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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// Strange attractor parameters derived from transformation
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const attractors = [
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{
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a: 1.4, b: -1.6, c: 1.0, d: -0.3,
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scale: 20, speed: 0.02,
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color: '#ffffff'
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},
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{
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a: 2.01, b: -2.53, c: 1.58, d: -1.5,
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scale: 15, speed: 0.015,
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color: '#cccccc'
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},
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{
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a: -1.24, b: -1.25, c: 2.69, d: -1.03,
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scale: 25, speed: 0.018,
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color: '#aaaaaa'
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}
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];
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const points = Array(3).fill().map(() => ({
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x: 0, y: 0,
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trail: [],
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maxTrail: 200
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}));
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let time = 0;
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function drawStrangeAttractor() {
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ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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attractors.forEach((attr, i) => {
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const p = points[i];
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// Update point position
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const x = Math.sin(p.y * attr.b) - Math.cos(p.x * attr.a);
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const y = Math.sin(p.x * attr.c) - Math.cos(p.y * attr.d);
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p.x = x;
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p.y = y;
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// Add to trail
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p.trail.push({x: p.x, y: p.y});
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if (p.trail.length > p.maxTrail) p.trail.shift();
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// Draw trail
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ctx.strokeStyle = attr.color;
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ctx.lineWidth = 1;
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ctx.beginPath();
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for (let j = 0; j < p.trail.length; j++) {
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const segment = p.trail[j];
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const px = (segment.x * attr.scale) + canvas.width/2;
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const py = (segment.y * attr.scale) + canvas.height/2;
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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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time += 0.01;
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}
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function animate() {
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drawStrangeAttractor();
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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> |