218 lines
No EOL
8.4 KiB
HTML
218 lines
No EOL
8.4 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 Tendrils</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: #ccc;
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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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flex: 1;
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}
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#attribution {
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text-align: right;
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padding: 8px 16px;
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font-size: 10px;
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opacity: 0.6;
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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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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 derived from input
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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: 1.07, min: 1.0, max: 1.1 },
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tone: { curiosity: 0.7, dryness: 0.8, playfulness: 0.3 }
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};
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// Flow field parameters
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const fieldWidth = 32;
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const fieldHeight = 32;
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const segmentCount = Math.floor(150 * params.density + 20);
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const maxParticles = 500;
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const decayRate = 0.995 * params.lifespan + 0.005;
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const complexityRatio = params.complexity * 0.8 + 0.2;
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const motionFactor = params.motion * 1.5 + 0.5;
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const connectednessFactor = params.connectedness;
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const colorDryness = params.tone.dryness;
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// Flow field vectors (curl noise)
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const vectors = Array(fieldHeight).fill().map((_, y) =>
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Array(fieldWidth).fill().map((_, x) => {
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const noiseX = x / fieldWidth * 4 + performance.now() * 0.0005 * motionFactor;
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const noiseY = y / fieldHeight * 4 + performance.now() * 0.0003 * motionFactor;
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const angle = Math.atan2(
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Math.cos(noiseX * 2) * Math.sin(noiseY * 3),
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Math.sin(noiseX * 3) * Math.cos(noiseY * 2)
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) + Math.PI/2;
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const length = 0.8 + Math.sin(noiseX) * 0.3 + Math.cos(noiseY) * 0.2;
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return { x: Math.cos(angle) * length, y: Math.sin(angle) * length };
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})
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);
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// Particle system
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class Particle {
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constructor() {
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this.reset();
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this.life = params.lifespan > 0.7 ? 1000 : Math.random() * 200 + 50;
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this.width = params.dryness > 0.7 ? 0.5 : 1 + Math.random() * 2;
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this.trail = [];
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this.trailLength = Math.floor(params.complexity * 20 + 5);
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}
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reset() {
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this.pos = {
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x: Math.random() * canvas.width,
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y: Math.random() * canvas.height
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};
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this.vel = { x: 0, y: 0 };
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this.size = params.density > 0.5 ?
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(1 + Math.random() * 2) * (0.5 + params.connectedness * 0.5) :
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(0.5 + Math.random()) * (0.5 + params.connectedness * 0.5);
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this.hue = 180 + Math.random() * 30;
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this.saturation = 60 + params.tone.curiosity * 20;
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this.lightness = 70;
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this.noiseOffset = Math.random() * 100;
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this.angle = 0;
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}
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update() {
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// Get flow field vector
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const fieldX = Math.floor(this.pos.x / canvas.width * fieldWidth) % fieldWidth;
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const fieldY = Math.floor(this.pos.y / canvas.height * fieldHeight) % fieldHeight;
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const fieldVec = vectors[fieldY][fieldX];
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// Add turbulence based on complexity
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const turbulence = params.complexity * 0.3;
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const noiseX = this.pos.x * 0.01 + this.noiseOffset;
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const noiseY = this.pos.y * 0.01 + this.noiseOffset;
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const turbulenceX = Math.cos(noiseX * 5 + performance.now() * 0.001) * turbulence;
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const turbulenceY = Math.sin(noiseY * 5 + performance.now() * 0.001) * turbulence;
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// Update velocity with field influence
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this.vel.x += (fieldVec.x + turbulenceX) * motionFactor * 0.1;
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this.vel.y += (fieldVec.y + turbulenceY) * motionFactor * 0.1;
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// Add connectedness behavior (network-like attraction)
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if (connectednessFactor > 0.3) {
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const closest = particles.filter(p => p !== this && p.size > 1)
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.sort((a, b) => {
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const distA = Math.hypot(a.pos.x - this.pos.x, a.pos.y - this.pos.y);
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const distB = Math.hypot(b.pos.x - this.pos.x, b.pos.y - this.pos.y);
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return distA - distB;
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})[0];
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if (closest) {
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const dist = Math.hypot(closest.pos.x - this.pos.x, closest.pos.y - this.pos.y);
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if (dist < 200) {
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const influence = connectednessFactor * (1 - dist/200);
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this.vel.x += (closest.pos.x - this.pos.x) * influence * 0.001;
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this.vel.y += (closest.pos.y - this.pos.y) * influence * 0.001;
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}
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}
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}
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// Update position
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this.pos.x += this.vel.x;
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this.pos.y += this.vel.y;
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// Boundary check
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if (this.pos.x < 0 || this.pos.x > canvas.width) this.vel.x *= -0.5;
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if (this.pos.y < 0 || this.pos.y > canvas.height) this.vel.y *= -0.5;
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// Trail capture
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this.trail.push({...this.pos});
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if (this.trail.length > this.trailLength) {
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this.trail.shift();
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}
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// Lifespan decay
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this.life--;
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this.size *= decayRate;
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this.lightness = Math.max(30, this.lightness - 0.1);
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// Reset if dead
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if (this.life <= 0 || this.size < 0.1) {
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this.reset();
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}
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}
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draw() {
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ctx.strokeStyle = `hsl(${this.hue}, ${this.saturation}%, ${this.lightness}%)`;
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ctx.lineWidth = this.width;
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ctx.beginPath();
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// Draw trail
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if (this.trail.length > 1) {
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ctx.moveTo(this.trail[0].x, this.trail[0].y);
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for (let i = 1; i < this.trail.length; i++) {
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const point = this.trail[i];
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const next = this.trail[i + 1] || this.pos;
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const controlX = (point.x + next.x) / 2;
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const controlY = (point.y + next.y) / 2;
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ctx.quadraticCurveTo(
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point.x, point.y,
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controlX, controlY
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);
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}
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ctx.lineTo(this.pos.x, this.pos.y);
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ctx.stroke();
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}
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}
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}
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let particles = Array(maxParticles).fill().map(() => new Particle());
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function animate() {
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// Pulsing density
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const pulseFactor = params.pulse.avg + Math.sin(performance.now() * 0.002) * (params.pulse.max - params.pulse.min) * 0.5;
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// Clear with fade effect
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ctx.fillStyle = `rgba(10, 10, 10, ${0.05 * params.dryness + 0.05})`;
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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// Update and draw particles
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particles.forEach(p => {
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p.update();
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p.draw();
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});
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// Occasionally add new particles based on density
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if (Math.random() < (0.01 * pulseFactor * params.density)) {
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particles[Math.floor(Math.random() * particles.length)].reset();
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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> |