145 lines
No EOL
4 KiB
HTML
145 lines
No EOL
4 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>Neurameba 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: #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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}
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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: 20px;
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right: 20px;
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color: rgba(255, 255, 255, 0.3);
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font-family: monospace;
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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 class="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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// Set canvas to full window size
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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
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const points = [];
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const maxPoints = 300;
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const step = 0.01;
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let time = 0;
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// Base parameters for a chaotic attractor
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const a = 1.4;
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const b = 0.3;
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// Color palette (dryness=monochrome)
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const palette = {
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white: '#ffffff',
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dark: '#111111',
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mid: '#444444'
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};
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function initPoints() {
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points.length = 0;
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for (let i = 0; i < maxPoints; i++) {
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points.push({
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x: Math.random() * 2 - 1,
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y: Math.random() * 2 - 1,
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size: 0.5 + Math.random() * 0.5
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});
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}
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}
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function updatePoints() {
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for (let i = 0; i < points.length; i++) {
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const p = points[i];
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// Strange attractor equations (Henon-like)
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const x = p.x;
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const y = p.y;
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p.x = y + 1 - a * x * x;
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p.y = b * x;
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// Apply circular boundary
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const dist = Math.sqrt(p.x * p.x + p.y * p.y);
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if (dist > 2) {
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p.x *= 0.9;
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p.y *= 0.9;
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}
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}
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}
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function draw() {
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// Fade background slightly
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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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// Draw points with motion blur
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ctx.fillStyle = palette.white;
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for (let i = 0; i < points.length; i++) {
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const p = points[i];
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// Size based on density parameter
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const size = p.size * 2 * (0.5 + 0.5 * Math.sin(time * 0.1)) * 1.5;
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// Position in center of canvas
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const x = (p.x * 0.4 + 0.5) * canvas.width;
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const y = (p.y * 0.4 + 0.5) * canvas.height;
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// Draw with slight glow
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const glow = size * 1.5;
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ctx.beginPath();
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ctx.arc(x, y, glow, 0, Math.PI * 2);
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ctx.fillStyle = `rgba(255, 255, 255, 0.1)`;
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ctx.fill();
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ctx.beginPath();
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ctx.arc(x, y, size, 0, Math.PI * 2);
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ctx.fillStyle = palette.white;
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ctx.fill();
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}
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time += step;
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updatePoints();
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}
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let animationId;
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function animate() {
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draw();
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animationId = requestAnimationFrame(animate);
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}
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initPoints();
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animate();
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// Clean up on unload
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window.addEventListener('unload', () => {
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cancelAnimationFrame(animationId);
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});
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</script>
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</body>
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</html> |