birth: Surface Scratches Organize
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index.html
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215
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>Scratching the Surface</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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}
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canvas {
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display: block;
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}
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#attribution {
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position: absolute;
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bottom: 10px;
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left: 10px;
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color: #222;
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font-size: 10px;
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pointer-events: none;
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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
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const params = {
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motion: 0.552,
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density: 0.522,
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complexity: 0.495,
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connectedness: 0.567,
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lifespan: 0.581,
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survivingNodes: 87,
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branchCount: 82,
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loops: 1399,
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maxDepth: 22,
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thicknessRatio: 1.25,
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fractalDim: 1.5,
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pulseAvg: 0.37,
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pulseMin: 0.30,
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pulseMax: 1.60,
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anger: 0.0,
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sadness: 0.0,
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curiosity: 0.10,
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dryness: 0.90,
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playfulness: 0.0,
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tension: 0.0
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};
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// Reaction-diffusion grid
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const GRID_SIZE = 128;
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const CELL_SIZE = Math.min(canvas.width, canvas.height) / GRID_SIZE;
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let grid = new Array(GRID_SIZE * GRID_SIZE).fill(0);
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let nextGrid = new Array(GRID_SIZE * GRID_SIZE).fill(0);
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// Initialize with sparse, organic patterns
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function initGrid() {
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for (let i = 0; i < GRID_SIZE * GRID_SIZE; i++) {
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grid[i] = Math.random() < params.density * 0.8 ? 1 : 0;
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}
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}
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// Gray tone palette (dryness=0.9)
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const palette = [
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'#f5f5f5', // light gray base
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'#e0e0e0',
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'#cccccc',
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'#b8b8b8',
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'#a3a3a3',
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'#8f8f8f',
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'#7a7a7a'
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];
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// Reaction-diffusion simulation
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function simulate() {
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const Da = 1.0 + params.motion * 0.5;
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const Db = 0.5 - params.motion * 0.3;
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const feed = 0.055 + params.complexity * 0.02;
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const kill = 0.062 - params.connectedness * 0.04;
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for (let y = 1; y < GRID_SIZE - 1; y++) {
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for (let x = 1; x < GRID_SIZE - 1; x++) {
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const idx = y * GRID_SIZE + x;
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const idxN = (y - 1) * GRID_SIZE + x;
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const idxS = (y + 1) * GRID_SIZE + x;
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const idxE = y * GRID_SIZE + (x + 1);
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const idxW = y * GRID_SIZE + (x - 1);
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const A = grid[idx];
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const B = grid[idx] - nextGrid[idx];
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nextGrid[idx] =
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grid[idx] +
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(Da * (grid[idxN] + grid[idxS] + grid[idxE] + grid[idxW] - 4 * grid[idx]) +
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B * B * feed -
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kill * B); // Gray-Scott variation
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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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nextGrid.fill(0);
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}
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// Pulse effect
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let pulseDirection = 1;
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let pulseValue = params.pulseAvg;
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function updatePulse() {
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pulseValue += (Math.random() - 0.5) * params.pulseAvg * 0.1 * pulseDirection;
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if (pulseValue > params.pulseMax) pulseDirection = -1;
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if (pulseValue < params.pulseMin) pulseDirection = 1;
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}
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// Drawing
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function draw() {
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ctx.fillStyle = '#111';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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const scale = CELL_SIZE * pulseValue;
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const offsetX = (canvas.width - GRID_SIZE * scale) / 2;
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const offsetY = (canvas.height - GRID_SIZE * scale) / 2;
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for (let y = 0; y < GRID_SIZE; y++) {
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for (let x = 0; x < GRID_SIZE; x++) {
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const idx = y * GRID_SIZE + x;
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const value = grid[idx];
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if (value > 0) {
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const intensity = Math.min(1, value * 3);
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const colorIdx = Math.floor(intensity * (palette.length - 1));
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ctx.fillStyle = palette[colorIdx];
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ctx.beginPath();
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ctx.arc(
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offsetX + x * scale + scale/2,
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offsetY + y * scale + scale/2,
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scale * 0.4 * intensity,
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0, Math.PI * 2
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);
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ctx.fill();
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}
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}
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}
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// Add some organic connections
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ctx.strokeStyle = '#ddd';
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ctx.lineWidth = Math.max(0.5, scale * 0.1);
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ctx.globalAlpha = 0.3;
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for (let y = 0; y < GRID_SIZE; y++) {
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for (let x = 0; x < GRID_SIZE; x++) {
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const idx = y * GRID_SIZE + x;
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if (grid[idx] > 0.3) {
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const neighbors = [
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(y-1) * GRID_SIZE + x,
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(y+1) * GRID_SIZE + x,
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y * GRID_SIZE + (x-1),
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y * GRID_SIZE + (x+1)
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].filter(n => n >= 0 && n < GRID_SIZE*GRID_SIZE && grid[n] > 0.3);
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if (neighbors.length > 0) {
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const nx = neighbors[Math.floor(Math.random() * neighbors.length)];
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const x2 = Math.floor(nx % GRID_SIZE);
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const y2 = Math.floor(nx / GRID_SIZE);
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ctx.beginPath();
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ctx.moveTo(
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offsetX + x * scale + scale/2,
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offsetY + y * scale + scale/2
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);
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ctx.lineTo(
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offsetX + x2 * scale + scale/2,
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offsetY + y2 * scale + scale/2
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);
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ctx.stroke();
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}
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}
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}
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}
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ctx.globalAlpha = 1;
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}
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// Animation loop
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let frameCount = 0;
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function animate() {
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frameCount++;
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updatePulse();
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simulate();
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draw();
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requestAnimationFrame(animate);
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}
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initGrid();
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animate();
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</script>
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</body>
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</html>
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