224 lines
No EOL
7.7 KiB
HTML
224 lines
No EOL
7.7 KiB
HTML
<!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>Diffusive Echoes</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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#info {
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position: absolute;
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bottom: 10px;
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right: 10px;
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color: #444;
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font-size: 10px;
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text-align: right;
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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="info">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: 0.5,
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density: 0.5,
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complexity: 0.5,
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connectedness: 0.5,
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lifespan: 0.5,
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pulseAvg: 1.08,
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pulseRange: 0.15,
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dryness: 0.9,
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playfulness: 0.1,
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tension: 0.0,
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energy: 0.4
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};
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// Reaction-diffusion simulation
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const size = Math.floor(Math.min(canvas.width, canvas.height) / 2);
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const gridWidth = Math.floor(canvas.width / 4);
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const gridHeight = Math.floor(canvas.height / 4);
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// Initialize two grids for the reaction-diffusion model
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let gridA = new Array(gridWidth * gridHeight).fill(0);
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let gridB = new Array(gridWidth * gridHeight).fill(0);
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// Initialize with random seeds
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for (let i = 0; i < gridWidth * gridHeight; i++) {
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if (Math.random() < 0.1 * (1 + params.density * 9)) {
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gridA[i] = Math.random();
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}
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}
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// Simulation parameters
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const feed = 0.055 + params.connectedness * 0.02;
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const kill = 0.062 + params.motion * 0.03;
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const diffA = 0.05 + params.complexity * 0.1;
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const diffB = 0.1 + params.complexity * 0.2;
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const timeStep = 1;
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// Palette based on parameters
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const isDry = params.dryness > 0.7;
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const isPlayful = params.playfulness > 0.3;
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const isCurious = params.curiosity > 0.3;
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let hueBase = 180;
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if (isCurious) hueBase = 160; // Teals
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if (isPlayful) hueBase = 60; // Yellows
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let saturation = isDry ? 50 : 90;
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let brightness = 60 + params.energy * 40;
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// Animation state
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let frameCount = 0;
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let pulse = params.pulseAvg;
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let lastTime = 0;
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function updateGrids() {
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// Create temporary grids
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const newA = new Array(gridWidth * gridHeight).fill(0);
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const newB = new Array(gridWidth * gridHeight).fill(0);
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// Apply reaction-diffusion rules
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for (let y = 1; y < gridHeight - 1; y++) {
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for (let x = 1; x < gridWidth - 1; x++) {
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const i = y * gridWidth + x;
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// Calculate laplacian (neighbor average)
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const laplacianA = (
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gridA[i - 1] + gridA[i + 1] +
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gridA[i - gridWidth] + gridA[i + gridWidth] +
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gridA[i - gridWidth - 1] + gridA[i - gridWidth + 1] +
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gridA[i + gridWidth - 1] + gridA[i + gridWidth + 1]
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) / 8 - gridA[i];
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const laplacianB = (
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gridB[i - 1] + gridB[i + 1] +
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gridB[i - gridWidth] + gridB[i + gridWidth] +
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gridB[i - gridWidth - 1] + gridB[i - gridWidth + 1] +
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gridB[i + gridWidth - 1] + gridB[i + gridWidth + 1]
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) / 8 - gridB[i];
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// Reaction terms
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const reaction = gridA[i] * gridB[i];
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newA[i] = gridA[i] + (diffA * laplacianA - reaction + feed * (1 - gridA[i])) * timeStep;
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newB[i] = gridB[i] + (diffB * laplacianB + reaction - (kill + feed) * gridB[i]) * timeStep;
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// Clamp values
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newA[i] = Math.max(0, Math.min(1, newA[i]));
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newB[i] = Math.max(0, Math.min(1, newB[i]));
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}
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}
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// Update grids
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for (let i = 0; i < gridWidth * gridHeight; i++) {
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gridA[i] = newA[i];
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gridB[i] = newB[i];
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}
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}
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function draw() {
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if (params.tension > 0.5) {
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ctx.filter = 'contrast(150%) brightness(80%)';
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} else {
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ctx.filter = 'none';
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}
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// Fade background slightly
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if (params.lifespan > 0.5) {
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ctx.fillStyle = `rgba(10, 10, 10, 0.05)`;
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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}
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// Draw reaction-diffusion cells
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const cellWidth = canvas.width / gridWidth;
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const cellHeight = canvas.height / gridHeight;
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// Calculate hue variation
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const hueVariation = 30 * params.complexity;
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for (let y = 0; y < gridHeight; y++) {
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for (let x = 0; x < gridWidth; x++) {
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const i = y * gridWidth + x;
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const valA = gridA[i];
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const valB = gridB[i];
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// Combined value with some reaction-diffusion magic
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const combined = valA - valB;
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if (Math.abs(combined) > 0.1) {
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// Use valA for hue variation
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const hue = (hueBase + hueVariation * combined) % 360;
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// Brightness based on energy and density
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const bright = brightness + params.density * 20 * (0.5 + combined);
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// Saturation based on dryness
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const sat = saturation * (1 - params.dryness * 0.5);
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ctx.fillStyle = `hsl(${hue}, ${sat}%, ${bright}%)`;
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// Elliptical shapes for complexity
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const phase = frameCount * 0.01;
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const scale = 0.3 + 0.7 * Math.abs(combined);
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const w = cellWidth * scale * (0.5 + valA * 0.5);
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const h = cellHeight * scale * (0.5 + valB * 0.5);
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ctx.beginPath();
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ctx.ellipse(
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x * cellWidth + cellWidth / 2 + Math.sin(y * 0.3 + phase) * 5,
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y * cellHeight + cellHeight / 2 + Math.cos(x * 0.3 + phase) * 5,
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w, h, 0, 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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// Update pulse for variation
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frameCount++;
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if (frameCount % 30 === 0) {
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pulse = params.pulseAvg + (Math.random() * 2 - 1) * params.pulseRange;
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}
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}
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function animate(timestamp) {
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const deltaTime = timestamp - lastTime;
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lastTime = timestamp;
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// Slow down animation based on motion parameter
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const speed = 0.01 + params.motion * 0.03;
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if (deltaTime > 16) { // Skip frames if needed
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updateGrids();
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draw();
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}
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requestAnimationFrame(animate);
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}
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requestAnimationFrame(animate);
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</script>
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</body>
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</html> |