birth: Flowing tendrils in twilight

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motd_admin 2026-05-04 21:48:39 +00:00
parent c4e0c8c085
commit 505a7d2be1

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Flow Field Organism</title>
<style>
body {
margin: 0;
overflow: hidden;
background: #0a0a0a;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
font-family: Arial, sans-serif;
}
canvas {
display: block;
}
#attribution {
position: absolute;
bottom: 20px;
color: #555;
font-size: 10px;
text-align: center;
width: 100%;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<div id="attribution">neurameba · motd.social</div>
<script>
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
// Set canvas to full window size
function resizeCanvas() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
}
window.addEventListener('resize', resizeCanvas);
resizeCanvas();
// Parameters
const params = {
motion: 0.5,
density: 0.5,
complexity: 0.5,
connectedness: 0.5,
lifespan: 0.5,
pulse: { avg: 1.11, min: 0.95, max: 1.30 },
tone: { anger: 0.00, sadness: 0.00, curiosity: 0.10, dryness: 0.90, playfulness: 0.00, tension: 0.00 }
};
// Flow field settings
const field = {
size: 20,
influence: 5,
flow: 0.05,
decay: 0.95,
nodes: []
};
// Particle system
const particles = [];
const particleCount = Math.floor(300 * params.density);
// Initialize flow field
function initField() {
for (let y = 0; y < canvas.height; y += field.size) {
for (let x = 0; x < canvas.width; x += field.size) {
const angle = Math.random() * Math.PI * 2;
const strength = 1 + Math.random() * 0.5;
field.nodes.push({
x: x,
y: y,
angle: angle,
strength: strength,
originalAngle: angle
});
}
}
}
// Create particles with lifespans
function initParticles() {
for (let i = 0; i < particleCount; i++) {
const p = {
x: Math.random() * canvas.width,
y: Math.random() * canvas.height,
vx: 0,
vy: 0,
life: 0,
maxLife: 100 + Math.random() * 200,
trail: [],
size: 1 + Math.random() * 2 * params.complexity,
color: `hsl(0, 0%, ${90 + Math.random() * 10}%)`
};
particles.push(p);
}
}
// Update flow field
function updateField() {
field.nodes.forEach(node => {
// Slow drift over time
node.angle += (Math.random() - 0.5) * 0.02 * params.motion;
node.angle = (node.angle + Math.PI * 2) % (Math.PI * 2);
// Slight decay
node.strength = Math.max(0.5, node.strength * 0.995);
});
}
// Update particles
function updateParticles() {
particles.forEach(p => {
p.life += 1;
// Find nearest field node
let nearest = null;
let minDist = Infinity;
for (const node of field.nodes) {
const dist = Math.hypot(p.x - node.x, p.y - node.y);
if (dist < minDist) {
minDist = dist;
nearest = node;
}
}
// Move toward field direction
if (nearest && minDist < field.influence) {
const angleDiff = ((nearest.angle - Math.atan2(p.y - nearest.y, p.x - nearest.x)) + Math.PI) % (Math.PI * 2) - Math.PI;
p.vx += Math.cos(nearest.angle) * nearest.strength * 0.01 * params.motion;
p.vy += Math.sin(nearest.angle) * nearest.strength * 0.01 * params.motion;
}
// Apply resistance
p.vx *= 0.95;
p.vy *= 0.95;
// Update position
p.x += p.vx;
p.y += p.vy;
// Bounce at edges
if (p.x < 0 || p.x > canvas.width) p.vx *= -1;
if (p.y < 0 || p.y > canvas.height) p.vy *= -1;
// Trail
p.trail.push({x: p.x, y: p.y});
if (p.trail.length > 20) p.trail.shift();
// Fade and die
if (p.life > p.maxLife) {
p.maxLife = 0;
}
});
// Remove dead particles
for (let i = particles.length - 1; i >= 0; i--) {
if (particles[i].maxLife <= 0) {
particles.splice(i, 1);
}
}
// Add new particles to maintain density
while (particles.length < particleCount) {
initParticles();
}
}
// Draw
function draw() {
// Fade background slightly
ctx.fillStyle = 'rgba(10, 10, 10, 0.05)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
// Draw particles
particles.forEach(p => {
if (p.trail.length > 1) {
// Draw trail
ctx.beginPath();
ctx.moveTo(p.trail[0].x, p.trail[0].y);
for (let i = 1; i < p.trail.length; i++) {
const alpha = i / p.trail.length * 0.8;
ctx.strokeStyle = `rgba(255, 255, 255, ${alpha})`;
ctx.lineTo(p.trail[i].x, p.trail[i].y);
ctx.stroke();
}
}
// Draw particle
ctx.beginPath();
ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
ctx.fillStyle = p.color;
ctx.fill();
});
// Draw field nodes occasionally
if (Math.random() < 0.02) {
const node = field.nodes[Math.floor(Math.random() * field.nodes.length)];
ctx.beginPath();
ctx.arc(node.x, node.y, 2, 0, Math.PI * 2);
ctx.fillStyle = 'rgba(255, 255, 255, 0.3)';
ctx.fill();
}
}
// Animation loop
function animate() {
updateField();
updateParticles();
draw();
requestAnimationFrame(animate);
}
// Start
initField();
initParticles();
animate();
</script>
</body>
</html>