169 lines
No EOL
5.4 KiB
HTML
169 lines
No EOL
5.4 KiB
HTML
```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>Fractal Nebula</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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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: Arial, sans-serif;
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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: absolute;
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bottom: 20px;
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color: #666;
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font-size: 12px;
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text-align: center;
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width: 100%;
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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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// 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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// Parameters
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const params = {
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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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pulse: { avg: 1.05, min: 1.0, max: 1.1 },
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tone: { anger: 0.0, sadness: 0.0, curiosity: 0.1, dryness: 0.9, playfulness: 0.0, tension: 0.0 }
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};
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// Fractal system
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class FractalBranch {
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constructor(x, y, length, angle, depth, width) {
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this.x = x;
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this.y = y;
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this.length = length;
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this.angle = angle;
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this.depth = depth;
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this.width = width * 0.8;
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this.color = this.getColor();
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this.children = [];
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this.pulse = params.pulse.avg;
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this.maxDepth = Math.floor(params.complexity * 10);
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}
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getColor() {
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const baseHue = 180 + Math.random() * 30;
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const saturation = 50 + Math.random() * 30;
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const lightness = 40 + Math.random() * 20;
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return `hsl(${baseHue}, ${saturation}%, ${lightness}%)`;
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}
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grow() {
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if (this.depth >= this.maxDepth || Math.random() > 0.6) return;
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const newLength = this.length * (0.6 + Math.random() * 0.4);
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const newWidth = this.width * (0.6 + Math.random() * 0.4);
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const newAngle = this.angle + (Math.random() - 0.5) * Math.PI * 0.2;
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const child = new FractalBranch(
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this.x + Math.cos(this.angle) * this.length,
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this.y + Math.sin(this.angle) * this.length,
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newLength,
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newAngle,
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this.depth + 1,
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newWidth
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);
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this.children.push(child);
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child.grow();
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}
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draw(parentAlpha = 1) {
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const pulseFactor = params.pulse.min + (params.pulse.max - params.pulse.min) * (0.5 + Math.sin(Date.now() * 0.005) * 0.5);
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this.pulse = this.pulse * 0.9 + pulseFactor * 0.1;
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const alpha = parentAlpha * (this.depth / this.maxDepth);
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ctx.globalAlpha = alpha;
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ctx.strokeStyle = this.color;
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ctx.lineWidth = this.width * this.pulse;
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ctx.lineCap = 'round';
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ctx.beginPath();
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ctx.moveTo(this.x, this.y);
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ctx.lineTo(
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this.x + Math.cos(this.angle) * this.length * this.pulse,
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this.y + Math.sin(this.angle) * this.length * this.pulse
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);
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ctx.stroke();
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for (const child of this.children) {
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child.draw(alpha);
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}
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}
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}
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// Initialize system
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let rootBranches = [];
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function initSystem() {
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rootBranches = [];
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const maxBranches = 5 + Math.floor(params.density * 20);
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const centerX = canvas.width / 2;
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const centerY = canvas.height / 2;
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const maxLength = 50 + params.complexity * 200;
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for (let i = 0; i < maxBranches; i++) {
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const angle = Math.random() * Math.PI * 2;
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const length = maxLength * (0.5 + Math.random() * 0.5);
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const branch = new FractalBranch(centerX, centerY, length, angle, 0, 3);
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branch.grow();
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rootBranches.push(branch);
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}
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}
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// Animation loop
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function animate() {
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// Fade previous frame
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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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ctx.globalAlpha = 1;
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// Update and draw branches
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for (const branch of rootBranches) {
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branch.draw();
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}
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requestAnimationFrame(animate);
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}
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// Start animation
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initSystem();
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animate();
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// Handle parameter changes (simulated)
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window.addEventListener('click', () => {
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initSystem();
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});
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</script>
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</body>
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</html>
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``` |