birth: Whispering Chemical Shadows

2026-07-21 21:47:18 +00:00 · 2026-07-21 21:47:18 +00:00 · 6bcf0a03d8
commit 6bcf0a03d8
parent ef704ced48
1 changed files with 123 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,123 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Diffusive Echoes</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #0a0a1a;
+            font-family: 'Courier New', monospace;
+        }
+        #canvas {
+            display: block;
+        }
+        #attribution {
+            position: fixed;
+            bottom: 10px;
+            right: 10px;
+            color: rgba(255, 255, 255, 0.5);
+            font-size: 10px;
+            pointer-events: none;
+        }
+    </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');
+
+        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,
+            deltaTime: 1,
+            diffusionA: 1,
+            diffusionB: 0.5,
+            width: Math.floor(canvas.width / 4),
+            height: Math.floor(canvas.height / 4),
+            scale: 4
+        };
+
+        // Simulation state
+        let grid = createGrid(params.width, params.height);
+        let nextGrid = createGrid(params.width, params.height);
+
+        function createGrid(width, height) {
+            const grid = new Array(width);
+            for (let i = 0; i < width; i++) {
+                grid[i] = new Array(height);
+                for (let j = 0; j < height; j++) {
+                    grid[i][j] = Math.random() * 0.1;
+                }
+            }
+            return grid;
+        }
+
+        function updateGrid() {
+            const { width, height, feed, kill, diffusionA, diffusionB } = params;
+
+            for (let x = 1; x < width - 1; x++) {
+                for (let y = 1; y < height - 1; y++) {
+                    const a = grid[x][y];
+                    const b = grid[x][y];
+
+                    // Compute Laplacian
+                    const laplacianA = (grid[x-1][y] + grid[x+1][y] + grid[x][y-1] + grid[x][y+1] - 4 * a) * diffusionA;
+                    const laplacianB = (grid[x-1][y] + grid[x+1][y] + grid[x][y-1] + grid[x][y+1] - 4 * b) * diffusionB;
+
+                    // Reaction terms
+                    const reactionA = a * b * b;
+                    const reactionB = a * b * b;
+
+                    // Update next state
+                    nextGrid[x][y] = a + (laplacianA - reactionA + feed * (1 - a)) * params.deltaTime;
+                    nextGrid[x][y] = Math.max(0, Math.min(1, nextGrid[x][y]));
+
+                    nextGrid[x][y] = b + (laplacianB + reactionB - kill * b) * params.deltaTime;
+                    nextGrid[x][y] = Math.max(0, Math.min(1, nextGrid[x][y]));
+                }
+            }
+
+            // Swap grids
+            [grid, nextGrid] = [nextGrid, grid];
+        }
+
+        function draw() {
+            const { width, height, scale } = params;
+            ctx.fillStyle = '#0a0a1a';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            for (let x = 0; x < width; x++) {
+                for (let y = 0; y < height; y++) {
+                    const val = grid[x][y];
+                    if (val > 0.2) {
+                        const intensity = Math.min(1, val * 2);
+                        ctx.fillStyle = `rgba(200, 210, 220, ${intensity * 0.8})`;
+                        ctx.fillRect(x * scale, y * scale, scale, scale);
+                    }
+                }
+            }
+        }
+
+        function animate() {
+            updateGrid();
+            draw();
+            requestAnimationFrame(animate);
+        }
+
+        animate();
+    </script>
+</body>
+</html>