birth: Diffused Currents Stir
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index.html
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192
index.html
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<!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>Diffused Currents</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: #0a0a1a;
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font-family: 'Courier New', monospace;
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}
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canvas {
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display: block;
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}
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#footer {
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position: fixed;
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bottom: 10px;
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right: 10px;
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color: #555;
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font-size: 10px;
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text-shadow: 0 0 5px rgba(0,0,0,0.5);
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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="footer">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 the abstract specs
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const params = {
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motion: 0.532,
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density: 0.553,
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complexity: 0.560,
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connectedness: 0.481,
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lifespan: 0.499,
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pulseAvg: 0.49,
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pulseMin: 0.30,
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pulseMax: 1.85,
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tone: {
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curiosity: 0.70,
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dryness: 0.90,
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playfulness: 0.10
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}
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};
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// Reaction-diffusion simulation
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const size = 60;
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const cols = Math.floor(canvas.width / size);
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const rows = Math.floor(canvas.height / size);
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let grid = [];
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let nextGrid = [];
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// Adjust simulation parameters based on abstract inputs
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const feed = 0.05 + (params.complexity * 0.02);
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const kill = 0.06 + (params.connectedness * 0.03);
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const diffusionA = 0.8 + (params.motion * 0.5);
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const diffusionB = 0.4 + (params.density * 0.3);
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const diffuseRate = 0.1 + (params.pulseAvg * 0.4);
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const brightness = params.tone.dryness * 0.9;
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// Initialize grids
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for (let i = 0; i < cols; i++) {
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grid[i] = [];
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nextGrid[i] = [];
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for (let j = 0; j < rows; j++) {
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const val = Math.random() * 0.1;
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grid[i][j] = { a: val, b: val };
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nextGrid[i][j] = { a: val, b: val };
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}
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}
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// Add central concentration
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const centerX = Math.floor(cols / 2);
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const centerY = Math.floor(rows / 2);
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for (let i = -5; i <= 5; i++) {
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for (let j = -5; j <= 5; j++) {
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const dist = Math.sqrt(i * i + j * j);
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if (dist < 8) {
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const amount = 1 - (dist / 8);
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grid[centerX + i][centerY + j].a += amount * 0.5;
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grid[centerX + i][centerY + j].b += amount * 0.1;
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}
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}
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}
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let time = 0;
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function draw() {
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// React & diffuse
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for (let i = 1; i < cols - 1; i++) {
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for (let j = 1; j < rows - 1; j++) {
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const a = grid[i][j].a;
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const b = grid[i][j].b;
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// Reaction
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const reaction = a * b * b;
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nextGrid[i][j].a = a + (diffusionA * diffuseRate * laplaceA(i, j) - reaction + feed * (1 - a));
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nextGrid[i][j].b = b + (diffusionB * diffuseRate * laplaceB(i, j) + reaction - (kill + feed) * b);
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// Clamp values
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nextGrid[i][j].a = Math.max(0, Math.min(1, nextGrid[i][j].a));
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nextGrid[i][j].b = Math.max(0, Math.min(1, nextGrid[i][j].b));
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}
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}
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// Swap grids
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[grid, nextGrid] = [nextGrid, grid];
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// Draw
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ctx.fillStyle = `rgba(0, 0, 0, ${0.05 + (1 - params.tone.dryness) * 0.05})`;
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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for (let i = 0; i < cols; i++) {
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for (let j = 0; j < rows; j++) {
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const val = grid[i][j].b;
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if (val > 0.05) {
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const hue = 180 + (Math.sin(time * 0.02 + i * 0.1 + j * 0.1) * 30);
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const saturation = 50 + (val * 50);
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const lightness = 20 + (val * 30 * params.tone.curiosity);
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const alpha = val * 0.8 * brightness;
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ctx.fillStyle = `hsla(${hue}, ${saturation}%, ${lightness}%, ${alpha})`;
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ctx.fillRect(i * size, j * size, size, size);
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}
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}
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}
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// Pulse effect
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const pulseScale = params.pulseAvg + Math.sin(time * 0.01) * 0.1;
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if (pulseScale > params.pulseMax * 0.8) {
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// Insert a temporary high-contrast pulse
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ctx.fillStyle = 'rgba(255, 255, 255, 0.15)';
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ctx.beginPath();
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ctx.arc(
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canvas.width * 0.5,
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canvas.height * 0.5,
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Math.min(canvas.width, canvas.height) * 0.15 * pulseScale,
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0,
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Math.PI * 2
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);
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ctx.fill();
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}
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time++;
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requestAnimationFrame(draw);
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}
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function laplaceA(x, y) {
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return (
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grid[x][y].a * -1 +
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grid[x-1][y].a * 0.2 +
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grid[x+1][y].a * 0.2 +
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grid[x][y-1].a * 0.2 +
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grid[x][y+1].a * 0.2 +
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grid[x-1][y-1].a * 0.05 +
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grid[x+1][y+1].a * 0.05 +
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grid[x-1][y+1].a * 0.05 +
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grid[x+1][y-1].a * 0.05
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);
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}
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function laplaceB(x, y) {
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return (
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grid[x][y].b * -1 +
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grid[x-1][y].b * 0.2 +
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grid[x+1][y].b * 0.2 +
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grid[x][y-1].b * 0.2 +
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grid[x][y+1].b * 0.2 +
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grid[x-1][y-1].b * 0.05 +
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grid[x+1][y+1].b * 0.05 +
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grid[x-1][y+1].b * 0.05 +
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grid[x+1][y-1].b * 0.05
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);
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}
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draw();
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</script>
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</body>
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</html>
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