birth: Oxidizing Fractures Bloom

2026-08-15 02:21:20 +00:00 · 2026-08-15 02:21:20 +00:00 · 7fdd547d55
commit 7fdd547d55
parent 6738aec7c1
1 changed files with 137 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,137 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Rust Patterns</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background-color: #0a0a0a;
+            font-family: 'Courier New', monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #attribution {
+            position: absolute;
+            bottom: 10px;
+            right: 10px;
+            color: #444;
+            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 = {
+            feedRate: 0.055,
+            killRate: 0.062,
+            diffusionRateA: 1.0,
+            diffusionRateB: 0.5,
+            timeStep: 1.0,
+            gridSize: 4,
+            paleness: 0.3 + Math.random() * 0.2,
+            colorVariation: 0.1
+        };
+
+        const width = Math.floor(canvas.width / params.gridSize);
+        const height = Math.floor(canvas.height / params.gridSize);
+        const size = width * height;
+
+        // Initialize grids
+        let grid = new Float32Array(size * 2);
+        let nextGrid = new Float32Array(size * 2);
+
+        // Initialize with random values
+        for (let i = 0; i < size; i++) {
+            grid[i] = Math.random();
+            grid[i + size] = Math.random();
+        }
+
+        // Reaction-diffusion kernel
+        const laplacian = (x, y) => {
+            let sum = 0;
+            let count = 0;
+
+            for (let ky = -1; ky <= 1; ky++) {
+                for (let kx = -1; kx <= 1; kx++) {
+                    if (kx === 0 && ky === 0) continue;
+                    if (x + kx < 0 || x + kx >= width || y + ky < 0 || y + ky >= height) continue;
+
+                    sum += grid[(y + ky) * width + (x + kx)];
+                    count++;
+                }
+            }
+            return (sum - grid[y * width + x] * count) / (count + 1);
+        };
+
+        function update() {
+            // Update reaction-diffusion
+            for (let y = 0; y < height; y++) {
+                for (let x = 0; x < width; x++) {
+                    const i = y * width + x;
+
+                    const a = grid[i];
+                    const b = grid[i + size];
+
+                    const laplacianA = laplacian(x, y);
+                    const laplacianB = laplacian(x, y);
+
+                    nextGrid[i] = a + params.timeStep *
+                        (params.diffusionRateA * laplacianA - a * b * b + params.feedRate * (1 - a));
+
+                    nextGrid[i + size] = b + params.timeStep *
+                        (params.diffusionRateB * laplacianB + a * b * b - (params.killRate + params.feedRate) * b);
+                }
+            }
+
+            // Swap grids
+            [grid, nextGrid] = [nextGrid, grid];
+
+            // Draw
+            ctx.clearRect(0, 0, canvas.width, canvas.height);
+
+            for (let y = 0; y < height; y++) {
+                for (let x = 0; x < width; x++) {
+                    const i = y * width + x;
+                    const a = grid[i];
+                    const b = grid[i + size];
+
+                    // Simple dark palette with variation
+                    const value = Math.min(1, Math.max(0, (a - b) * params.paleness));
+                    const hue = 0 + (a - b) * params.colorVariation * 120;
+                    ctx.fillStyle = `hsl(${hue}, 80%, ${Math.max(10, 10 + (value * 40))}%)`;
+                    ctx.fillRect(
+                        x * params.gridSize,
+                        y * params.gridSize,
+                        params.gridSize + 1,
+                        params.gridSize + 1
+                    );
+                }
+            }
+
+            requestAnimationFrame(update);
+        }
+
+        update();
+    </script>
+</body>
+</html>