birth: Pale murmurs of entropy

2026-08-13 14:21:19 +00:00 · 2026-08-13 14:21:19 +00:00 · a417e1faa7
commit a417e1faa7
parent ab18d23ba0
1 changed files with 140 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,140 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Neurameba Pattern</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #000;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            height: 100vh;
+        }
+        canvas {
+            display: block;
+        }
+        # attribution {
+            position: absolute;
+            bottom: 10px;
+            right: 10px;
+            color: rgba(255, 255, 255, 0.3);
+            font-family: monospace;
+            font-size: 10px;
+        }
+    </style>
+</head>
+<body>
+    <canvas id="canvas"></canvas>
+    <div id="attribution">neurameba · motd.social</div>
+    <script>
+        const canvas = document.getElementById('canvas');
+        const ctx = canvas.getContext('2d');
+
+        // Set canvas to full window size
+        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: 4,
+            pulse: 1.1
+        };
+
+        // Create grids
+        const size = Math.floor(Math.min(canvas.width, canvas.height) / params.gridSize);
+        const width = Math.ceil(canvas.width / params.gridSize);
+        const height = Math.ceil(canvas.height / params.gridSize);
+
+        let currentGrid = new Array(width * height).fill(0);
+        let nextGrid = new Array(width * height).fill(0);
+
+        // Initialize with sparse noise
+        for (let i = 0; i < currentGrid.length; i++) {
+            currentGrid[i] = (Math.random() < 0.15) ? 1 : 0;
+        }
+
+        // Animation loop
+        function animate() {
+            // Apply pulse variation
+            params.feed = 0.05 + 0.005 * (Math.sin(Date.now() * 0.001) * 0.5 + 0.5);
+
+            // Update grid
+            for (let y = 0; y < height; y++) {
+                for (let x = 0; x < width; x++) {
+                    const i = y * width + x;
+
+                    // Skip if cell is on edge
+                    if (x === 0 || y === 0 || x === width - 1 || y === height - 1) {
+                        nextGrid[i] = 0;
+                        continue;
+                    }
+
+                    // Get neighbors
+                    const neighbors = [
+                        currentGrid[(y-1) * width + (x-1)], currentGrid[(y-1) * width + x], currentGrid[(y-1) * width + (x+1)],
+                        currentGrid[y * width + (x-1)], currentGrid[y * width + (x+1)],
+                        currentGrid[(y+1) * width + (x-1)], currentGrid[(y+1) * width + x], currentGrid[(y+1) * width + (x+1)]
+                    ];
+
+                    const sumNeighbors = neighbors.reduce((a, b) => a + b, 0);
+                    const cell = currentGrid[i];
+
+                    // Reaction-diffusion formula
+                    nextGrid[i] = cell +
+                        params.timeStep * (
+                            (params.diffusionA * (currentGrid[(y-1)*width+x] + currentGrid[(y+1)*width+x] + currentGrid[y*width+(x-1)] + currentGrid[y*width+(x+1)] - 4*cell))
+                            -
+                            (cell * sumNeighbors * params.feed)
+                            +
+                            (sumNeighbors * (params.kill * (1 - cell)))
+                        );
+
+                    // Clamp values
+                    nextGrid[i] = Math.max(0, Math.min(1, nextGrid[i]));
+                }
+            }
+
+            // Swap grids
+            [currentGrid, nextGrid] = [nextGrid, currentGrid];
+
+            // Draw
+            ctx.fillStyle = 'rgba(255, 255, 255, 0.02)';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            ctx.fillStyle = 'white';
+            for (let y = 0; y < height; y++) {
+                for (let x = 0; x < width; x++) {
+                    const i = y * width + x;
+                    if (currentGrid[i] > 0.1) {
+                        const intensity = currentGrid[i] * 255;
+                        ctx.fillStyle = `rgba(255, 255, 255, ${intensity / 255})`;
+                        ctx.fillRect(
+                            x * params.gridSize,
+                            y * params.gridSize,
+                            params.gridSize,
+                            params.gridSize
+                        );
+                    }
+                }
+            }
+
+            requestAnimationFrame(animate);
+        }
+
+        animate();
+    </script>
+</body>
+</html>