neurameba/muted-pulse-in-grayscale-n29c
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birth: Muted Pulse in Grayscale

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motd_admin 2026-06-23 17:47:21 +00:00
parent 57b4357164
commit 199d663e1d
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Neurameba Pattern</title>
<style>
body {
margin: 0;
overflow: hidden;
background: #000;
font-family: monospace;
}
canvas {
display: block;
}
#info {
position: absolute;
bottom: 10px;
right: 10px;
color: rgba(255, 255, 255, 0.3);
font-size: 10px;
text-align: right;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<div id="info">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();
// Simulation parameters derived from organism data
const params = {
motion: 0.5,
density: 0.5,
complexity: 0.5,
connectedness: 0.5,
lifespan: 0.5,
pulse: 1.08,
tone: {
anger: 0.0,
sadness: 0.0,
curiosity: 0.1,
dryness: 0.9,
playfulness: 0.0,
tension: 0.0
}
};
// Reaction-diffusion simulation
const gridSize = Math.min(50, Math.max(20, Math.floor(20 + params.density * 30)));
const cellSize = Math.min(window.innerWidth, window.innerHeight) / gridSize;
const cols = Math.ceil(window.innerWidth / cellSize);
const rows = Math.ceil(window.innerHeight / cellSize);
// Gray-Scott parameters (scaled from organism parameters)
const F = 0.055 + params.complexity * 0.02;
const k = 0.062 - params.connectedness * 0.02;
const feedRate = 0.01 + params.motion * 0.01;
const killRate = 0.03 + (1 - params.lifespan) * 0.02;
// State buffers
let current = new Float64Array(cols * rows * 2);
let next = new Float64Array(cols * rows * 2);
// Initialize with sparse, random pattern
for (let i = 0; i < cols * rows; i++) {
if (Math.random() < 0.05 * (params.density * 2)) {
current[i * 2] = 0.5 + (Math.random() - 0.5) * 0.1;
current[i * 2 + 1] = 0.25 + (Math.random() - 0.5) * 0.05;
} else {
current[i * 2] = 0.5 + (Math.random() - 0.5) * 0.01;
current[i * 2 + 1] = 0.25 + (Math.random() - 0.5) * 0.005;
}
}
// Color palette (monochrome due to high dryness)
function getColor(u, v) {
const val = u + v * 0.5;
const gray = Math.floor(30 + val * 120);
return `rgb(${gray}, ${gray}, ${gray})`;
}
function laplacian(grid, x, y, component) {
const idx = (y * cols + x) * 2 + component;
let sum = 0;
for (let dy = -1; dy <= 1; dy++) {
for (let dx = -1; dx <= 1; dx++) {
if (dx === 0 && dy === 0) continue;
const nx = x + dx;
const ny = y + dy;
if (nx >= 0 && nx < cols && ny >= 0 && ny < rows) {
sum += grid[(ny * cols + nx) * 2 + component];
}
}
}
return sum / 8 - grid[idx];
}
function update() {
const aspectRatio = window.innerWidth / window.innerHeight;
const timeStep = 0.1;
for (let y = 0; y < rows; y++) {
for (let x = 0; x < cols; x++) {
const idx = (y * cols + x) * 2;
const u = current[idx];
const v = current[idx + 1];
// Apply Gray-Scott reaction-diffusion
const uvv = u * v * v;
const laplacianU = laplacian(current, x, y, 0);
const laplacianV = laplacian(current, x, y, 1);
next[idx] = u + timeStep * (
(feedRate * (1 - u) - uvv + 0.0001 * laplacianU) * params.pulse
);
next[idx + 1] = v + timeStep * (
(-killRate * v + uvv + 0.0001 * laplacianV) * params.pulse
);
// Boundary conditions
if (x === 0 || x === cols - 1 || y === 0 || y === rows - 1) {
next[idx] = 0.5;
next[idx + 1] = 0.25;
}
}
}
// Swap buffers
[current, next] = [next, current];
}
function draw() {
// Clear canvas with semi-transparent background for trail effect
ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
for (let y = 0; y < rows; y++) {
for (let x = 0; x < cols; x++) {
const idx = (y * cols + x) * 2;
const u = current[idx];
const v = current[idx + 1];
if (u > 0.2 && v > 0.05) {
const cellX = x * cellSize;
const cellY = y * cellSize;
// Size based on complexity and connectedness
const size = 2 + (u - 0.2) * 10 * params.complexity;
// Color based on tone parameters
const val = u + v * 0.5;
const gray = Math.floor(30 + val * 120);
ctx.fillStyle = `rgba(${gray}, ${gray}, ${gray}, ${0.5 + u * 0.5})`;
ctx.fillRect(cellX, cellY, cellSize, cellSize);
}
}
}
}
function animate() {
update();
draw();
requestAnimationFrame(animate);
}
animate();
</script>
</body>
</html>