birth: Diffusive Monochrome Flows

2026-06-04 13:47:17 +00:00 · 2026-06-04 13:47:17 +00:00 · 37f7cb4a9b
commit 37f7cb4a9b
parent 91a983ca40
1 changed files with 136 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,136 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Diffusive Chaos</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #000;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            height: 100vh;
+            font-family: monospace;
+        }
+        #attribution {
+            position: absolute;
+            bottom: 20px;
+            color: #444;
+            font-size: 12px;
+            text-align: center;
+            width: 100%;
+        }
+    </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();
+
+        // Parameters from generative art builder
+        const motion = 0.5;
+        const density = 0.5;
+        const complexity = 0.5;
+        const connectedness = 0.5;
+        const lifespan = 0.5;
+        const pulse = { avg: 1.05, min: 1.0, max: 1.1 };
+        const tone = { dryness: 0.9 };
+
+        // Reaction-diffusion parameters
+        const params = {
+            feed: 0.055 + complexity * 0.02,
+            kill: 0.062 - complexity * 0.02,
+            resolution: 1 + Math.floor(10 * density),
+            iterations: 1 + Math.floor(5 * complexity),
+            diffusion: 0.1 + motion * 0.1,
+            timeScale: 0.1 + motion * 0.2
+        };
+
+        // Create grids
+        const width = Math.floor(canvas.width / params.resolution);
+        const height = Math.floor(canvas.height / params.resolution);
+        const grid = new Array(width * height).fill(1);
+        const next = new Array(width * height).fill(1);
+
+        // Initialize with sparse spots
+        const spots = Math.floor(density * width * height * 0.1);
+        for (let i = 0; i < spots; i++) {
+            const idx = Math.floor(Math.random() * width * height);
+            grid[idx] = Math.random();
+        }
+
+        // Palette (monochrome for dryness)
+        const palette = {
+            getColor: (v) => `hsl(0, 0%, ${20 + v * 60}%)`
+        };
+
+        // Animation loop
+        function animate(timestamp) {
+            // Pulse effect
+            const pulseFactor = pulse.min + (pulse.max - pulse.min) *
+                (0.5 + 0.5 * Math.sin(timestamp * 0.001 * pulse.avg));
+
+            // Reaction-diffusion steps
+            for (let iter = 0; iter < params.iterations; iter++) {
+                for (let x = 1; x < width - 1; x++) {
+                    for (let y = 1; y < height - 1; y++) {
+                        const idx = x + y * width;
+                        const a = grid[idx - width - 1] * params.diffusion;
+                        const b = grid[idx] * params.diffusion;
+                        const c = grid[idx + width + 1] * params.diffusion;
+                        const d = grid[idx - 1] * params.diffusion;
+                        const e = grid[idx + 1] * params.diffusion;
+
+                        const laplacianA = (a + b + c + d + e) - 5 * grid[idx];
+
+                        const feedRate = params.feed * (1 - grid[idx]);
+                        const killRate = params.kill / (1 + grid[d - 1] * 10);
+
+                        next[idx] = grid[idx] + (params.timeScale * pulseFactor) *
+                            (feedRate * laplacianA - killRate - grid[idx] * next[idx]);
+                    }
+                }
+                [grid, next] = [next, grid];
+            }
+
+            // Render
+            ctx.fillStyle = '#000';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            const cellWidth = canvas.width / width;
+            const cellHeight = canvas.height / height;
+
+            for (let y = 0; y < height; y++) {
+                for (let x = 0; x < width; x++) {
+                    const idx = x + y * width;
+                    const value = Math.min(1, Math.max(0, (grid[idx] - 0.5) * 2));
+                    ctx.fillStyle = palette.getColor(value);
+                    ctx.fillRect(
+                        x * cellWidth,
+                        y * cellHeight,
+                        cellWidth,
+                        cellHeight
+                    );
+                }
+            }
+
+            requestAnimationFrame(animate);
+        }
+
+        requestAnimationFrame(animate);
+    </script>
+</body>
+</html>