178 lines
5.4 KiB
HTML
178 lines
5.4 KiB
HTML
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<!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 | neurameba</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: fixed;
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bottom: 20px;
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right: 20px;
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color: #444;
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font-size: 10px;
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font-family: monospace;
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text-shadow: 0 0 5px rgba(0,0,0,0.5);
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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 resize() {
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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', resize);
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resize();
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// Strange attractor parameters
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const params = {
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a: 1.5,
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b: 0.3,
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c: 1.0,
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d: 0.3,
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e: 0.1,
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f: 0.0,
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scale: 0.5,
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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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pulseFactor: 1.03
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};
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// Color palette (dryness/monochrome)
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const colors = [
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{r: 255, g: 255, b: 255, a: 0.1},
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{r: 200, g: 200, b: 200, a: 0.2},
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{r: 150, g: 150, b: 150, a: 0.3},
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{r: 100, g: 100, b: 100, a: 0.4}
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];
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// Particle system
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const particles = [];
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const maxPoints = Math.floor(200 + 200 * params.complexity);
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const trailLength = Math.floor(5 + 15 * params.connectedness);
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class Particle {
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constructor() {
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this.reset();
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this.trail = [];
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}
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reset() {
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this.x = Math.random() * canvas.width;
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this.y = Math.random() * canvas.height;
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this.prevX = this.x;
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this.prevY = this.y;
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this.size = 0.5 + Math.random() * 1.5;
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this.life = 0;
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this.maxLife = 50 + Math.random() * 100;
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}
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update() {
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this.prevX = this.x;
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this.prevY = this.y;
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// Strange attractor equations (modified Rössler attractor)
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const x = this.x - canvas.width/2;
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const y = this.y - canvas.height/2;
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const a = params.a * 0.5;
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const b = params.b;
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const c = params.c;
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const d = params.d * (0.5 + params.connectedness * 0.5);
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const e = params.e;
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const pulse = params.pulseFactor;
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const dt = 0.01 * (0.5 + params.motion * 0.5);
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const dx = (-y - z) * dt * pulse;
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const dy = (x + a*y) * dt * pulse;
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const dz = (b + z*(x - c)) * dt * pulse;
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z = z + dz;
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this.x += dx * params.scale * (0.8 + params.density * 0.4);
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this.y += dy * params.scale * (0.8 + params.density * 0.4);
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this.life++;
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// Trail
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this.trail.push({x: this.x, y: this.y});
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if (this.trail.length > trailLength) {
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this.trail.shift();
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}
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// Reset if too old or out of bounds
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if (this.life > this.maxLife ||
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this.x < -100 || this.x > canvas.width + 100 ||
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this.y < -100 || this.y > canvas.height + 100) {
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this.reset();
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}
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}
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draw() {
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ctx.strokeStyle = `rgba(${colors[Math.floor(Math.random() * colors.length)].r},
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${colors[Math.floor(Math.random() * colors.length)].g},
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${colors[Math.floor(Math.random() * colors.length)].b},
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${colors[Math.floor(Math.random() * colors.length)].a})`;
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ctx.lineWidth = this.size;
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ctx.beginPath();
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ctx.moveTo(this.prevX, this.prevY);
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for (let i = 0; i < this.trail.length; i++) {
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const point = this.trail[i];
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const alpha = i / this.trail.length;
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ctx.globalAlpha = alpha * colors[0].a;
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ctx.lineTo(point.x, point.y);
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}
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ctx.stroke();
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ctx.globalAlpha = 1.0;
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}
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}
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// Initialize particles
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for (let i = 0; i < maxPoints; i++) {
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particles.push(new Particle());
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}
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let z = 0;
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let frameCount = 0;
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function animate() {
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frameCount++;
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// Clear with fade effect
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ctx.fillStyle = 'rgba(10, 10, 10, 0.05)';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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// Update and draw particles
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particles.forEach(p => {
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p.update();
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p.draw();
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});
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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>
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