192 lines
No EOL
6 KiB
HTML
192 lines
No EOL
6 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>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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}
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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: 10px;
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left: 10px;
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color: #444;
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font-family: monospace;
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font-size: 10px;
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z-index: 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 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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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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// Fractal 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: 1.06,
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tone: {
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anger: 0.0,
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sadness: 0.0,
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curiosity: 0.1,
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dryness: 0.9,
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playfulness: 0.0,
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tension: 0.0
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}
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};
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// Color palette (monochrome with slight teal variation)
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const palette = {
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bg: '#0a0a0a',
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base: '#1a1a1a',
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line: '#4a4a4a',
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highlight: '#7a7a7a'
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};
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if (params.tone.curiosity > 0.5) {
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palette.line = `hsl(180, 30%, ${50 + params.tone.curiosity * 20}%)`;
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palette.highlight = `hsl(180, 60%, ${70 + params.tone.curiosity * 20}%)`;
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}
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// Fractal tree parameters
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const branchCount = Math.floor(3 + params.complexity * 5);
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const depth = Math.floor(3 + params.complexity * 7);
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const maxWidth = 1 + params.connectedness * 4;
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const branchVariation = 0.7 + params.motion * 0.3;
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const angleVariation = 0.3 + params.motion * 0.4;
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// Tree node
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class TreeNode {
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constructor(x, y, angle, width, depth) {
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this.x = x;
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this.y = y;
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this.angle = angle;
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this.width = width;
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this.depth = depth;
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this.maxDepth = depth;
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this.children = [];
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this.lifespan = 0;
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this.maxLifespan = 100 + Math.random() * 100 * params.lifespan;
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}
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grow() {
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if (this.depth <= 0) return;
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const branchLength = 20 / (1 + this.depth * 0.5);
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const newWidth = this.width * 0.7;
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// Branch directions with variation
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const directions = [];
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for (let i = 0; i < branchCount; i++) {
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const angleOffset = (Math.random() - 0.5) * angleVariation * Math.PI;
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directions.push(this.angle + angleOffset);
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}
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directions.forEach((newAngle, i) => {
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const rad = newAngle;
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const newX = this.x + Math.cos(rad) * branchLength;
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const newY = this.y + Math.sin(rad) * branchLength;
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const child = new TreeNode(
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newX,
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newY,
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newAngle,
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newWidth,
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this.depth - 1
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);
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// Some branches can loop back toward parent
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if (Math.random() < params.connectedness * 0.3 && this.depth > 1) {
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child.x = this.x + Math.cos(newAngle + Math.PI * 0.7) * branchLength * 0.4;
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child.y = this.y + Math.sin(newAngle + Math.PI * 0.7) * branchLength * 0.4;
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}
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this.children.push(child);
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});
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}
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update() {
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this.lifespan++;
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this.children.forEach(child => child.update());
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}
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draw() {
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ctx.strokeStyle = palette.line;
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ctx.lineWidth = this.width * (1 - this.lifespan / this.maxLifespan);
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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) * 20 / (1 + this.depth * 0.5),
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this.y + Math.sin(this.angle) * 20 / (1 + this.depth * 0.5)
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);
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ctx.stroke();
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this.children.forEach(child => child.draw());
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}
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}
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// Root nodes
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const roots = [];
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const rootCount = 3 + Math.floor(params.density * 8);
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for (let i = 0; i < rootCount; i++) {
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roots.push(new TreeNode(
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canvas.width * 0.3 + Math.random() * canvas.width * 0.4,
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canvas.height * 0.3 + Math.random() * canvas.height * 0.4,
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Math.random() * Math.PI * 2,
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maxWidth,
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depth
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));
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}
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// Main animation
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function animate() {
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// Fade effect for low lifespan
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if (params.lifespan < 0.3) {
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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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}
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ctx.fillStyle = palette.bg;
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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roots.forEach(root => {
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if (Math.random() < params.motion * 0.1) {
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root.grow();
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}
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root.update();
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root.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> |