212 lines
No EOL
7.2 KiB
HTML
212 lines
No EOL
7.2 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>Flowing Organism</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: #000;
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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: monospace;
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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: 20px;
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left: 50%;
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transform: translateX(-50%);
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color: #fff;
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font-size: 10px;
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background: rgba(0,0,0,0.5);
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padding: 2px 5px;
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border-radius: 3px;
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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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// Flow field parameters
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const CELL_SIZE = 10;
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const numRows = Math.ceil(canvas.height / CELL_SIZE);
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const numCols = Math.ceil(canvas.width / CELL_SIZE);
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const flowField = [];
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const particles = [];
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const particleCount = 150;
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// Create flow field based on parameters
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function initFlowField() {
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flowField.length = 0;
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for (let y = 0; y < numRows; y++) {
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flowField[y] = [];
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for (let x = 0; x < numCols; x++) {
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// Base vectors influenced by complexity and connectedness
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const angle = (Math.sin(x * 0.01 + Date.now() * 0.0005) * Math.cos(y * 0.01)) * Math.PI * 2;
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const length = 0.1 + (Math.sin(x * 0.005) * Math.cos(y * 0.005)) * 0.2;
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flowField[y][x] = {
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x: Math.cos(angle) * length,
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y: Math.sin(angle) * length,
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strength: length
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};
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}
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}
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}
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// Create particles
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function initParticles() {
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particles.length = 0;
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for (let i = 0; i < particleCount; i++) {
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particles.push({
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x: Math.random() * canvas.width,
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y: Math.random() * canvas.height,
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size: 1 + Math.random() * 2,
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speed: 0.5 + Math.random() * 1,
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lifetime: 0,
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maxLifetime: 200 + Math.random() * 200,
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path: [],
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hue: 0,
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trailLength: 5 + Math.random() * 10
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});
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}
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}
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// Update flow field (slowly changing)
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function updateFlowField() {
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for (let y = 0; y < numRows; y++) {
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for (let x = 0; x < numCols; x++) {
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const cell = flowField[y][x];
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cell.x += (Math.random() - 0.5) * 0.02;
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cell.y += (Math.random() - 0.5) * 0.02;
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const length = Math.sqrt(cell.x * cell.x + cell.y * cell.y);
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cell.strength = length;
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// Normalize
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if (length > 0) {
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cell.x /= length;
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cell.y /= length;
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}
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}
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}
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}
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// Update particles
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function updateParticles() {
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particles.forEach(p => {
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p.lifetime++;
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if (p.lifetime > p.maxLifetime) {
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p.x = Math.random() * canvas.width;
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p.y = Math.random() * canvas.height;
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p.lifetime = 0;
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p.hue = (p.hue + 5) % 360;
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}
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// Move according to flow field
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const cellX = Math.floor(p.x / CELL_SIZE);
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const cellY = Math.floor(p.y / CELL_SIZE);
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const cell = flowField[cellY]?.[cellX];
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if (cell) {
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p.x += cell.x * p.speed;
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p.y += cell.y * p.speed;
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p.x = (p.x + canvas.width) % canvas.width;
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p.y = (p.y + canvas.height) % canvas.height;
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}
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// Add to path
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p.path.push({x: p.x, y: p.y});
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if (p.path.length > p.trailLength) {
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p.path.shift();
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}
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});
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}
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// Draw everything
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function draw() {
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// Fade background
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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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// Draw flow field (faintly)
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if (Math.random() < 0.3) {
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ctx.strokeStyle = 'rgba(255, 255, 255, 0.02)';
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ctx.lineWidth = 0.5;
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for (let y = 0; y < numRows; y++) {
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for (let x = 0; x < numCols; x++) {
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const cell = flowField[y][x];
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const startX = x * CELL_SIZE;
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const startY = y * CELL_SIZE;
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const endX = startX + cell.x * 5;
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const endY = startY + cell.y * 5;
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ctx.beginPath();
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ctx.moveTo(startX, startY);
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ctx.lineTo(endX, endY);
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ctx.stroke();
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}
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}
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}
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// Draw particles
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particles.forEach(p => {
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// Draw trail
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if (p.path.length > 1) {
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ctx.beginPath();
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ctx.moveTo(p.path[0].x, p.path[0].y);
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for (let i = 1; i < p.path.length; i++) {
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const point = p.path[i];
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const prev = p.path[i-1];
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const gradient = ctx.createLinearGradient(prev.x, prev.y, point.x, point.y);
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gradient.addColorStop(0, `hsla(${p.hue}, 70%, 50%, ${0.3 + i/p.trailLength * 0.7})`);
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gradient.addColorStop(1, `hsla(${p.hue}, 70%, 50%, 0)`);
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ctx.strokeStyle = gradient;
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ctx.lineWidth = p.size * (1 - i/p.trailLength);
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ctx.lineTo(point.x, point.y);
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}
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ctx.stroke();
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}
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// Draw head
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ctx.beginPath();
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ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
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ctx.fillStyle = `hsl(${p.hue}, 70%, 50%)`;
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ctx.fill();
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});
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}
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// Animation loop
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function animate() {
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updateFlowField();
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updateParticles();
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draw();
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requestAnimationFrame(animate);
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}
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// Initialize and start
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initFlowField();
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initParticles();
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animate();
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</script>
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</body>
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</html>
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``` |