185 lines
No EOL
6.8 KiB
HTML
185 lines
No EOL
6.8 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>Flow Field Organism</title>
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<style>
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body { margin: 0; overflow: hidden; background: #0a0a0a; }
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canvas { display: block; }
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.attribution { position: absolute; bottom: 10px; right: 10px; color: #444; font-family: monospace; font-size: 10px; }
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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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// Organism 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: 1.03, min: 0.8, max: 1.2 },
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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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// Flow field parameters
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const particleCount = Math.floor(100 + params.density * 200);
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const particles = [];
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const gridSize = 20;
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const flowField = [];
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const flowStrength = 0.1 + params.motion * 0.2;
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const noiseScale = 0.05;
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// Initialize 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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speed: 0.5 + Math.random() * 1.5,
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size: 1 + Math.random() * 2,
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hue: 0,
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life: 0,
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maxLife: 100 + Math.random() * 200
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});
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}
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}
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initParticles();
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// Initialize flow field
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function initFlowField() {
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flowField.length = 0;
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for (let y = 0; y < canvas.height / gridSize; y++) {
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for (let x = 0; x < canvas.width / gridSize; x++) {
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const angle = Math.random() * Math.PI * 2;
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flowField.push({
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vx: Math.cos(angle) * flowStrength,
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vy: Math.sin(angle) * flowStrength
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});
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}
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}
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}
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initFlowField();
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// Noise-based flow field
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function updateFlowField(time) {
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flowField.forEach((cell, i) => {
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const x = (i % (canvas.width / gridSize)) * gridSize;
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const y = Math.floor(i / (canvas.width / gridSize)) * gridSize;
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const n = noise(x * noiseScale, y * noiseScale, time * 0.0005);
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const angle = n * Math.PI * 8;
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cell.vx = Math.cos(angle) * flowStrength;
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cell.vy = Math.sin(angle) * flowStrength;
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});
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}
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// Particle movement
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function updateParticles(time) {
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particles.forEach(particle => {
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// Get flow field value
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const gridX = Math.floor(particle.x / gridSize);
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const gridY = Math.floor(particle.y / gridSize);
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const index = gridY * (canvas.width / gridSize) + gridX;
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if (index >= 0 && index < flowField.length) {
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// Blend with current velocity
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const currentVx = particle.x - (particle.prevX || particle.x);
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const currentVy = particle.y - (particle.prevY || particle.y);
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particle.prevX = particle.x;
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particle.prevY = particle.y;
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particle.x += (currentVx + flowField[index].vx * particle.speed) * 0.5;
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particle.y += (currentVy + flowField[index].vy * particle.speed) * 0.5;
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}
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// Wrap around edges
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if (particle.x < 0) particle.x = canvas.width;
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if (particle.x > canvas.width) particle.x = 0;
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if (particle.y < 0) particle.y = canvas.height;
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if (particle.y > canvas.height) particle.y = 0;
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// Update life
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particle.life++;
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if (particle.life > particle.maxLife) {
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particle.x = Math.random() * canvas.width;
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particle.y = Math.random() * canvas.height;
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particle.life = 0;
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}
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});
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}
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// Drawing
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function draw(time) {
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// Fade background
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ctx.fillStyle = 'rgba(0, 0, 0, 0.02)';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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// Draw particles
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ctx.lineCap = 'round';
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particles.forEach(particle => {
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const t = particle.life / particle.maxLife;
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const pulse = params.pulse.avg + Math.sin(time * 0.001) * 0.1;
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ctx.lineWidth = particle.size * (0.3 + t * 0.7) * pulse;
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ctx.strokeStyle = `hsl(0, 0%, ${80 + Math.sin(t * Math.PI * 2) * 20}%)`;
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ctx.beginPath();
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ctx.moveTo(particle.prevX || particle.x, particle.prevY || particle.y);
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ctx.lineTo(particle.x, particle.y);
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ctx.stroke();
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});
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// Draw flow field (subtle)
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if (time % 20 < 1) {
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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 < canvas.height; y += 20) {
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for (let x = 0; x < canvas.width; x += 20) {
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const index = (Math.floor(y/gridSize) * (canvas.width/gridSize)) + Math.floor(x/gridSize);
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if (index < flowField.length) {
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const len = Math.sqrt(flowField[index].vx ** 2 + flowField[index].vy ** 2) * 2;
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ctx.beginPath();
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ctx.moveTo(x, y);
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ctx.lineTo(x + flowField[index].vx * len, y + flowField[index].vy * len);
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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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}
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function animate(time) {
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updateFlowField(time);
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updateParticles(time);
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draw(time);
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requestAnimationFrame(animate);
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}
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animate(0);
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// Handle window focus/blur to pause/resume
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document.addEventListener('visibilitychange', () => {
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if (document.hidden) {
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// Pause
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} else {
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// Resume
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initParticles();
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}
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});
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</script>
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</body>
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</html> |