birth: Flowing Curiosity Fields

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motd_admin 2026-09-02 18:21:21 +00:00
parent aa1a99a1c8
commit a751d4d73e

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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;
color: #f0f0f0;
font-family: 'Courier New', monospace;
}
#attribution {
position: absolute;
bottom: 10px;
right: 10px;
font-size: 10px;
opacity: 0.6;
}
</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');
function resizeCanvas() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
}
window.addEventListener('resize', resizeCanvas);
resizeCanvas();
// Flow field settings
const FIELD_SIZE = 30;
const PARTICLE_COUNT = 150;
const PARTICLE_SIZE = 1.2;
const TRAIL_LENGTH = 80;
const MAX_SPEED = 0.25;
// Create flow field
const field = [];
const fieldWidth = Math.ceil(canvas.width / FIELD_SIZE);
const fieldHeight = Math.ceil(canvas.height / FIELD_SIZE);
// Initialize particles
const particles = Array(PARTICLE_COUNT).fill().map(() => ({
x: Math.random() * canvas.width,
y: Math.random() * canvas.height,
prevX: 0,
prevY: 0,
speed: 0.1 + Math.random() * MAX_SPEED,
angle: Math.random() * Math.PI * 2,
history: [],
color: `hsl(${Math.random() * 360}, 30%, 80%)`,
size: PARTICLE_SIZE * (0.8 + Math.random() * 0.4)
}));
// Generate Perlin-like noise field
function generateField() {
for (let y = 0; y < fieldHeight; y++) {
field[y] = [];
for (let x = 0; x < fieldWidth; x++) {
const nx = x / fieldWidth;
const ny = y / fieldHeight;
const angle = (Math.sin(nx * 10) * Math.cos(ny * 8) * Math.PI * 2) % (Math.PI * 2);
field[y][x] = angle;
}
}
}
function getFieldAngle(x, y) {
const fx = x / FIELD_SIZE;
const fy = y / FIELD_SIZE;
const x1 = Math.floor(fx);
const y1 = Math.floor(fy);
const x2 = (x1 + 1) % fieldWidth;
const y2 = (y1 + 1) % fieldHeight;
const sx = fx - x1;
const sy = fy - y1;
const n1 = field[y1][x1];
const n2 = field[y1][x2];
const ix1 = n1 + sx * (n2 - n1);
const n3 = field[y2][x1];
const n4 = field[y2][x2];
const ix2 = n3 + sx * (n4 - n3);
return ix1 + sy * (ix2 - ix1);
}
function updateParticles() {
particles.forEach(p => {
// Get field angle
const angle = getFieldAngle(p.x, p.y);
// Calculate attraction to center (dryness)
const centerX = canvas.width / 2;
const centerY = canvas.height / 2;
const dx = centerX - p.x;
const dy = centerY - p.y;
const dist = Math.sqrt(dx * dx + dy * dy);
const force = Math.min(0.05, 1 / (dist + 1));
// Update particle direction
p.angle = angle + (force * 0.3);
// Move particle
p.prevX = p.x;
p.prevY = p.y;
p.x += Math.cos(p.angle) * p.speed;
p.y += Math.sin(p.angle) * p.speed;
// Wrap around edges
if (p.x < 0) p.x = canvas.width;
if (p.x > canvas.width) p.x = 0;
if (p.y < 0) p.y = canvas.height;
if (p.y > canvas.height) p.y = 0;
// Add to history
p.history.push({x: p.x, y: p.y});
if (p.history.length > TRAIL_LENGTH) {
p.history.shift();
}
});
}
function drawParticles() {
ctx.globalCompositeOperation = 'lighter';
particles.forEach(p => {
// Draw trail
if (p.history.length > 1) {
ctx.beginPath();
ctx.moveTo(p.prevX, p.prevY);
p.history.forEach(point => {
ctx.lineTo(point.x, point.y);
});
ctx.strokeStyle = p.color;
ctx.lineWidth = p.size * 0.8;
ctx.stroke();
}
// Draw particle
ctx.beginPath();
ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
ctx.fillStyle = p.color;
ctx.fill();
});
ctx.globalCompositeOperation = 'source-over';
}
function animate() {
// Clear with fade effect (low energy/dryness)
ctx.fillStyle = 'rgba(0, 0, 0, 0.03)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
generateField();
updateParticles();
drawParticles();
requestAnimationFrame(animate);
}
animate();
</script>
</body>
</html>