birth: Orbital Echoes Unfold
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index.html
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199
index.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>Orbital Echoes</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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color: #aaa;
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display: flex;
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flex-direction: column;
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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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flex: 1;
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}
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.attribution {
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text-align: right;
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padding: 8px 12px;
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font-size: 10px;
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background: rgba(0,0,0,0.3);
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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="c"></canvas>
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<div class="attribution">neurameba · motd.social</div>
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<script>
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(function() {
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const canvas = document.getElementById('c');
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const ctx = canvas.getContext('2d');
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// Full window canvas
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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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// Parameters
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const params = {
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motion: 0.535,
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density: 0.440,
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complexity: 0.522,
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connectedness: 0.492,
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lifespan: 0.478,
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survivingNodes: 78,
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branchCount: 70,
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loops: 237,
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maxDepth: 19,
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thicknessRatio: 1.50,
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fractalDim: 1.661,
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pulseAvg: 0.77,
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pulseMin: 0.30,
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pulseMax: 2.00
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};
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// Pulse generator
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let pulseTime = 0;
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function getPulse() {
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pulseTime += 0.01;
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return params.pulseAvg + Math.sin(pulseTime) * (params.pulseMax - params.pulseMin)/2;
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}
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// Node class
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class Node {
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constructor(id) {
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this.id = id;
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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.targetX = this.x;
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this.targetY = this.y;
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this.size = 1 + Math.random() * 3 * params.thicknessRatio;
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this.velocity = new PIXI.Point(0, 0);
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this.links = [];
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this.age = Math.random() * 100;
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this.lifespan = 50 + Math.random() * 100 * (1 - params.lifespan);
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this.color = `hsl(${200 + Math.random() * 50}, 30%, 60%)`;
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}
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addLink(node) {
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this.links.push(node);
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}
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update(pulse) {
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this.age += 0.5 * pulse;
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this.x += (this.targetX - this.x) * 0.05 * pulse;
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this.y += (this.targetY - this.y) * 0.05 * pulse;
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// Pulse-driven motion
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this.x += Math.sin(this.age * 0.1) * 2 * pulse;
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this.y += Math.cos(this.age * 0.13) * 2 * pulse;
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// Fade toward end of lifespan
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if (this.age > this.lifespan) {
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this.size *= 0.95;
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}
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}
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draw() {
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if (this.age > this.lifespan * 0.8 && Math.random() > 0.5) return;
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ctx.beginPath();
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ctx.arc(this.x, this.y, this.size * (1 - this.age/this.lifespan), 0, Math.PI * 2);
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ctx.fillStyle = this.color;
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ctx.fill();
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// Draw links
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ctx.strokeStyle = this.color.replace('60%', '20%');
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ctx.lineWidth = 1;
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this.links.forEach(link => {
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if (link.age < link.lifespan && this.age < this.lifespan) {
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ctx.beginPath();
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ctx.moveTo(this.x, this.y);
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ctx.lineTo(link.x, link.y);
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ctx.stroke();
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}
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});
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}
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}
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// Graph class
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class NetworkGraph {
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constructor() {
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this.nodes = [];
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this.pulse = 1;
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// Create nodes
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for (let i = 0; i < params.survivingNodes; i++) {
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this.nodes.push(new Node(i));
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}
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// Create connections (loops favor networked structure)
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for (let i = 0; i < params.loops; i++) {
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const a = Math.floor(Math.random() * this.nodes.length);
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const b = Math.floor(Math.random() * this.nodes.length);
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if (a !== b) {
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this.nodes[a].addLink(this.nodes[b]);
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}
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}
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// Ensure some depth with branch count
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if (this.nodes.length > 0) {
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let depth = 0;
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let currentNodes = [this.nodes[0]];
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while (depth < params.maxDepth && currentNodes.length > 0) {
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const nextNodes = [];
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currentNodes.forEach(node => {
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const numLinks = Math.floor(1 + params.branchCount * params.connectedness * Math.random());
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for (let i = 0; i < numLinks; i++) {
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if (this.nodes.length > 0) {
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const target = this.nodes[Math.floor(Math.random() * this.nodes.length)];
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if (!node.links.includes(target)) {
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node.addLink(target);
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nextNodes.push(target);
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}
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}
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}
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});
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currentNodes = nextNodes;
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depth++;
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}
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}
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}
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update() {
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this.pulse = getPulse();
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this.nodes.forEach(node => node.update(this.pulse));
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}
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draw() {
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// Fade background
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ctx.fillStyle = 'rgba(5, 5, 10, 0.05)';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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// Draw nodes last (on top)
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this.nodes.forEach(node => node.draw());
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}
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}
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// Animation
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const graph = new NetworkGraph();
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function animate() {
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graph.update();
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graph.draw();
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requestAnimationFrame(animate);
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}
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animate();
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})();
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</script>
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</body>
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</html>
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