birth: Teal echoes in thin soup

2026-05-08 13:47:19 +00:00 · 2026-05-08 13:47:19 +00:00 · 00f35fb597
commit 00f35fb597
parent 3d0e5df723
1 changed files with 172 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,172 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Neurameba · motd.social</title>
+    <style>
+        body, html {
+            margin: 0;
+            padding: 0;
+            overflow: hidden;
+            background: #000;
+            height: 100%;
+            font-family: monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #info {
+            position: absolute;
+            bottom: 10px;
+            left: 10px;
+            color: #666;
+            font-size: 10px;
+            text-shadow: 0 0 5px rgba(0,0,0,0.5);
+        }
+    </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();
+
+        // Reaction-diffusion parameters
+        const params = {
+            feed: 0.055,
+            kill: 0.062,
+            diffusionA: 1.0,
+            diffusionB: 0.5,
+            timeStep: 1.0,
+            gridSize: 2,
+            hueBase: 180,
+            hueVariation: 30,
+            saturation: 70,
+            luminosity: 50,
+            trails: true,
+            trailDecay: 0.95
+        };
+
+        const cols = Math.floor(canvas.width / params.gridSize);
+        const rows = Math.floor(canvas.height / params.gridSize);
+        const grid = new Array(cols).fill().map(() => new Array(rows).fill(0));
+        const next = new Array(cols).fill().map(() => new Array(rows).fill(0));
+        const trails = new Array(cols).fill().map(() => new Array(rows).fill(0));
+
+        // Initialize with random values
+        function init() {
+            for (let x = 0; x < cols; x++) {
+                for (let y = 0; y < rows; y++) {
+                    grid[x][y] = Math.random() < 0.5 ? 0 : Math.random();
+                    next[x][y] = grid[x][y];
+                }
+            }
+
+            // Add some initial patterns
+            for (let i = 0; i < 5; i++) {
+                const x = Math.floor(Math.random() * cols);
+                const y = Math.floor(Math.random() * rows);
+                const size = Math.floor(Math.random() * 10 + 5);
+                for (let dx = -size; dx <= size; dx++) {
+                    for (let dy = -size; dy <= dy <= size; dy++) {
+                        if (dx*dx + dy*dy <= size*size) {
+                            const nx = (x + dx + cols) % cols;
+                            const ny = (y + dy + rows) % rows;
+                            grid[nx][ny] = 1;
+                        }
+                    }
+                }
+            }
+        }
+
+        // Reaction-diffusion step
+        function step() {
+            for (let x = 0; x < cols; x++) {
+                for (let y = 0; y < rows; y++) {
+                    const a = grid[x][y];
+                    const b = next[x][y];
+
+                    // Compute Laplacian
+                    let sumA = 0, sumB = 0;
+                    let count = 0;
+                    for (let dx = -1; dx <= 1; dx++) {
+                        for (let dy = -1; dy <= 1; dy++) {
+                            if (dx === 0 && dy === 0) continue;
+                            const nx = (x + dx + cols) % cols;
+                            const ny = (y + dy + rows) % rows;
+                            sumA += grid[nx][ny];
+                            sumB += next[nx][ny];
+                            count++;
+                        }
+                    }
+
+                    const laplacianA = (sumA / count - a) * params.diffusionA;
+                    const laplacianB = (sumB / count - b) * params.diffusionB;
+
+                    // Update equations
+                    next[x][y] = a + params.timeStep * (
+                        a * (params.feed - (a + 1) * b) + laplacianA
+                    );
+                    next[x][y] = Math.max(0, Math.min(next[x][y], 1));
+
+                    next[x][y] = b + params.timeStep * (
+                        b * (params.kill - b) * a + laplacianB + params.feed * (1 - b)
+                    );
+                    next[x][y] = Math.max(0, Math.min(next[x][y], 1));
+                }
+            }
+
+            // Swap grids
+            [grid, next] = [next, grid];
+        }
+
+        // Draw with trails
+        function draw() {
+            if (params.trails) {
+                ctx.fillStyle = `rgba(0, 0, 0, ${params.trailDecay})`;
+                ctx.fillRect(0, 0, canvas.width, canvas.height);
+            }
+
+            for (let x = 0; x < cols; x++) {
+                for (let y = 0; y < rows; y++) {
+                    const val = grid[x][y];
+                    if (val > 0.1) {
+                        const hue = params.hueBase + (val * params.hueVariation);
+                        const saturation = params.saturation + (val * 20);
+                        const luminosity = params.luminosity + (val * 10);
+                        ctx.fillStyle = `hsl(${hue}, ${saturation}%, ${luminosity}%)`;
+                        ctx.fillRect(x * params.gridSize, y * params.gridSize,
+                                    params.gridSize, params.gridSize);
+                    }
+                }
+            }
+
+            // Fade trails
+            for (let x = 0; x < cols; x++) {
+                for (let y = 0; y < rows; y++) {
+                    trails[x][y] *= params.trailDecay;
+                }
+            }
+        }
+
+        // Animation loop
+        function animate() {
+            step();
+            draw();
+            requestAnimationFrame(animate);
+        }
+
+        init();
+        animate();
+    </script>
+</body>
+</html>