147 lines
No EOL
4.3 KiB
HTML
147 lines
No EOL
4.3 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="UTF-8">
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
|
<title>Strange Attractor</title>
|
|
<style>
|
|
body {
|
|
margin: 0;
|
|
overflow: hidden;
|
|
background-color: #0a0a1a;
|
|
font-family: 'Courier New', monospace;
|
|
color: #a0a0d0;
|
|
}
|
|
canvas {
|
|
display: block;
|
|
}
|
|
#attribution {
|
|
position: fixed;
|
|
bottom: 15px;
|
|
left: 15px;
|
|
font-size: 10px;
|
|
opacity: 0.6;
|
|
user-select: none;
|
|
}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
<canvas id="canvas"></canvas>
|
|
<div id="attribution">neurameba · motd.social</div>
|
|
<script>
|
|
const canvas = document.getElementById('canvas');
|
|
const ctx = canvas.getContext('2d');
|
|
|
|
function resizeCanvas() {
|
|
canvas.width = window.innerWidth;
|
|
canvas.height = window.innerHeight;
|
|
}
|
|
|
|
window.addEventListener('resize', resizeCanvas);
|
|
resizeCanvas();
|
|
|
|
// Strange attractor parameters
|
|
const params = {
|
|
a: 2.24,
|
|
b: 0.43,
|
|
c: -0.65,
|
|
d: -2.43,
|
|
scale: 30,
|
|
motion: 0.536,
|
|
density: 0.189,
|
|
complexity: 0.833,
|
|
connectedness: 0.694,
|
|
lifespan: 0.477,
|
|
pulse: { avg: 0.37, min: 0.30, max: 1.25 }
|
|
};
|
|
|
|
// Color palette (dryness=monochrome, curiosity=teals)
|
|
const colors = {
|
|
bg: '#0a0a1a',
|
|
particle: `hsl(${Math.random() * 30 + 180}, 30%, ${50 + Math.sin(Date.now() * 0.001) * 5}%)`
|
|
};
|
|
|
|
// Particle system
|
|
class Particle {
|
|
constructor() {
|
|
this.reset();
|
|
this.life = 0;
|
|
this.maxLife = 100 + Math.random() * 50;
|
|
}
|
|
|
|
reset() {
|
|
this.x = Math.random() * 2 - 1;
|
|
this.y = Math.random() * 2 - 1;
|
|
this.z = Math.random() * 2 - 1;
|
|
this.vx = 0;
|
|
this.vy = 0;
|
|
this.vz = 0;
|
|
this.size = 0.1 + Math.random() * 0.3 * params.scale * 0.1;
|
|
}
|
|
|
|
update() {
|
|
// Strange attractor equations
|
|
const dt = 0.01 * params.motion;
|
|
const px = this.x;
|
|
const py = this.y;
|
|
const pz = this.z;
|
|
|
|
this.vx += dt * (params.a * px + params.b * py);
|
|
this.vy += dt * (params.c * px + (params.d - pz * pz) * py);
|
|
this.vz += dt * (1 + pz * pz);
|
|
|
|
this.x += this.vx;
|
|
this.y += this.vy;
|
|
this.z += this.vz;
|
|
|
|
this.life++;
|
|
|
|
// Pulse modulation
|
|
const pulse = params.pulse.avg + Math.sin(Date.now() * 0.001) * (params.pulse.max - params.pulse.min) * 0.5;
|
|
this.size = Math.max(0.01, this.size * pulse * 0.5);
|
|
}
|
|
|
|
draw() {
|
|
const scale = canvas.width / 4 * params.scale;
|
|
const x = canvas.width / 2 + this.x * scale;
|
|
const y = canvas.height / 2 + this.y * scale;
|
|
|
|
const age = this.life / this.maxLife;
|
|
const alpha = Math.min(1, age) * 0.8;
|
|
|
|
ctx.fillStyle = `rgba(0, ${Math.floor(50 + age * 50)}, ${Math.floor(150 + age * 100)}, ${alpha})`;
|
|
ctx.beginPath();
|
|
ctx.arc(x, y, this.size, 0, Math.PI * 2);
|
|
ctx.fill();
|
|
}
|
|
}
|
|
|
|
const particles = [];
|
|
const particleCount = Math.floor(50 + params.density * params.complexity * 200);
|
|
|
|
for (let i = 0; i < particleCount; i++) {
|
|
particles.push(new Particle());
|
|
}
|
|
|
|
function animate() {
|
|
// Clear with alpha for some motion trails
|
|
ctx.fillStyle = 'rgba(10, 10, 26, 0.1)';
|
|
ctx.fillRect(0, 0, canvas.width, canvas.height);
|
|
|
|
particles.forEach(p => {
|
|
p.update();
|
|
p.draw();
|
|
|
|
// Occasionally reset particles that have lived too long
|
|
if (p.life > p.maxLife) {
|
|
p.reset();
|
|
}
|
|
});
|
|
|
|
requestAnimationFrame(animate);
|
|
}
|
|
|
|
animate();
|
|
</script>
|
|
</body>
|
|
</html> |