248 lines
No EOL
8 KiB
HTML
248 lines
No EOL
8 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>Voronoi Fracture</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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#info {
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position: absolute;
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bottom: 10px;
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left: 10px;
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color: #555;
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font-size: 10px;
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}
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#attribution {
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position: absolute;
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bottom: 10px;
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right: 10px;
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color: #444;
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font-size: 10px;
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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="info"></div>
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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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const info = document.getElementById('info');
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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 based on generative art specs
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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: 1.06, min: 0.9, max: 1.2 },
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tone: { anger: 0, sadness: 0, curiosity: 0.1, dryness: 0.8, playfulness: 0, tension: 0 }
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};
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// Voronoi Fracture system
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const sites = [];
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const cells = [];
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let time = 0;
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let lastTime = 0;
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const FRAME_DELAY = 1000 / 60;
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// Initialize with density-based points
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function initSites() {
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sites.length = 0;
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const count = Math.floor(50 + params.density * 200);
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for (let i = 0; i < count; i++) {
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sites.push({
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x: Math.random() * canvas.width,
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y: Math.random() * canvas.height,
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vx: (Math.random() - 0.5) * params.motion * 2,
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vy: (Math.random() - 0.5) * params.motion * 2,
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fixed: Math.random() > 0.7,
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life: Math.random() * params.lifespan * 1000
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});
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}
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}
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// Build Voronoi diagram (simplified version)
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function buildVoronoi() {
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cells.length = 0;
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// For each site, find its polygon
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for (let i = 0; i < sites.length; i++) {
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const cell = {
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site: sites[i],
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edges: [],
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neighbors: []
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};
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// Find bisectors with all other sites
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for (let j = 0; j < sites.length; j++) {
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if (i !== j) {
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const bisector = findBisector(sites[i], sites[j]);
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if (bisector) cell.edges.push(bisector);
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// Check if sites are close enough to be neighbors
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const dx = sites[i].x - sites[j].x;
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const dy = sites[i].y - sites[j].y;
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if (dx*dx + dy*dy < 1000 + params.connectedness * 2000) {
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cell.neighbors.push(j);
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}
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}
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}
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cells.push(cell);
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}
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}
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// Find perpendicular bisector of two points
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function findBisector(a, b) {
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const cx = (a.x + b.x) / 2;
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const cy = (a.y + b.y) / 2;
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const dx = b.x - a.x;
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const dy = b.y - a.y;
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// Perpendicular direction
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const px = -dy;
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const py = dx;
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// Extend the bisector beyond reasonable limits
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const len = Math.sqrt(px*px + py*py) || 1;
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const nx = px / len;
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const ny = py / len;
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return {
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p1: { x: cx + nx * 2000, y: cy + ny * 2000 },
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p2: { x: cx - nx * 2000, y: cy - ny * 2000 }
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};
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}
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// Update sites based on motion and pulse
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function updateSites() {
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const now = Date.now();
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const deltaTime = now - lastTime;
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lastTime = now;
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time += deltaTime * 0.001 * params.pulse.avg;
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// Slight pulse variation
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params.pulse.current = params.pulse.avg;
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if (Math.random() < 0.02) {
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params.pulse.current = params.pulse.min + Math.random() * (params.pulse.max - params.pulse.min);
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}
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for (let i = 0; i < sites.length; i++) {
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const site = sites[i];
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// Aging
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site.life -= deltaTime * 0.1;
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if (site.life <= 0 && !site.fixed) {
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// Replace dying sites with new ones near edges
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sites[i] = {
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x: Math.random() < 0.5 ? 0 : canvas.width,
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y: Math.random() * canvas.height,
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vx: (Math.random() - 0.5) * params.motion * 2,
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vy: (Math.random() - 0.5) * params.motion * 2,
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fixed: Math.random() > 0.7,
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life: Math.random() * params.lifespan * 1000
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};
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continue;
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}
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// Motion
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if (!site.fixed) {
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site.x += site.vx * params.pulse.current;
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site.y += site.vy * params.pulse.current;
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// Boundary check
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if (site.x < 0 || site.x > canvas.width) site.vx *= -1;
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if (site.y < 0 || site.y > canvas.height) site.vy *= -1;
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}
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}
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}
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// Draw voronoi cells
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function drawVoronoi() {
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ctx.strokeStyle = `rgba(255, 255, 255, ${0.6 + params.tone.curiosity * 0.3})`;
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ctx.lineWidth = 0.5 + params.complexity * 0.5;
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for (let i = 0; i < cells.length; i++) {
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const cell = cells[i];
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const site = cell.site;
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// Only draw live cells
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if (site.life <= 0) continue;
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// Draw cell polygon (simplified convex hull approximation)
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ctx.beginPath();
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// Start from site position
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ctx.moveTo(site.x, site.y);
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// Connect to neighbors
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for (let j = 0; j < cell.neighbors.length; j++) {
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const neighborIndex = cell.neighbors[j];
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const neighbor = cells[neighborIndex].site;
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if (neighbor.life > 0) {
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ctx.lineTo(neighbor.x, neighbor.y);
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}
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}
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// Close path
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ctx.closePath();
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ctx.stroke();
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// Draw site marker
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const alpha = Math.min(1, site.life / 500);
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ctx.fillStyle = `rgba(255, 255, 255, ${alpha * 0.8})`;
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ctx.beginPath();
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ctx.arc(site.x, site.y, 2 + (1 - params.tone.dryness) * 1, 0, Math.PI * 2);
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ctx.fill();
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}
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}
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// Clear with slight fade
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function clearCanvas() {
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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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}
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// Main animation loop
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function animate() {
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clearCanvas();
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updateSites();
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buildVoronoi();
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drawVoronoi();
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// Update info
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const fps = Math.round(1000 / (Date.now() - lastTime));
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info.textContent = `voronoi system | ${fps} fps`;
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requestAnimationFrame(animate);
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}
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// Start with initial sites
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initSites();
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buildVoronoi();
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animate();
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</script>
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</body>
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</html> |