birth: Ghosts in Static Fields

2026-05-13 09:47:16 +00:00 · 2026-05-13 09:47:16 +00:00 · 23fa464309
commit 23fa464309
parent 573ad17472
1 changed files with 145 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,145 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Dissolving Memory</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #0a0a0a;
+            font-family: 'Courier New', monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #attribution {
+            position: absolute;
+            bottom: 10px;
+            left: 10px;
+            color: #333;
+            font-size: 10px;
+            mix-blend-mode: difference;
+        }
+    </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,
+            timeStep: 1.0,
+            diffusionRateA: 1.0,
+            diffusionRateB: 0.5,
+            scale: 1.0,
+            decay: 0.01,
+            motion: 0.5
+        };
+
+        // Initialize cells
+        const gridSize = 8;
+        const cols = Math.floor(canvas.width / gridSize) + 2;
+        const rows = Math.floor(canvas.height / gridSize) + 2;
+        const current = new Array(cols * rows).fill(0);
+        const next = new Array(cols * rows).fill(0);
+
+        // Initialize with sparse noise
+        function init() {
+            for (let i = 0; i < current.length; i++) {
+                current[i] = Math.random() > 0.9 ? 1 : 0;
+            }
+        }
+
+        init();
+
+        function update() {
+            for (let y = 1; y < rows - 1; y++) {
+                for (let x = 1; x < cols - 1; x++) {
+                    const idx = x + y * cols;
+
+                    // Moore neighborhood
+                    const a = current[idx];
+                    const aNeighbors = [
+                        current[idx - 1 - cols],
+                        current[idx - cols],
+                        current[idx + 1 - cols],
+                        current[idx - 1],
+                        current[idx + 1],
+                        current[idx - 1 + cols],
+                        current[idx + cols],
+                        current[idx + 1 + cols]
+                    ].reduce((sum, val) => sum + val, 0);
+
+                    // Gray-Scott reaction
+                    const b = 1 - a;
+                    const reaction = a * b * b;
+
+                    next[idx] = current[idx] +
+                               params.timeStep * (
+                                   params.diffusionRateA * aNeighbors +
+                                   -reaction * params.feed +
+                                   reaction * params.kill +
+                                   -params.decay * current[idx]
+                               );
+
+                    // Clamp values
+                    next[idx] = Math.max(0, Math.min(1, next[idx]));
+                }
+            }
+
+            // Swap buffers and add motion
+            for (let i = 0; i < current.length; i++) {
+                const delta = next[i] - current[i];
+                current[i] = next[i] + params.motion * delta * (Math.random() * 0.5 + 0.5);
+                next[i] = 0;
+            }
+        }
+
+        function draw() {
+            ctx.fillStyle = 'rgba(0, 0, 0, 0.1)';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            for (let y = 1; y < rows - 1; y++) {
+                for (let x = 1; x < cols - 1; x++) {
+                    const idx = x + y * cols;
+                    const val = current[idx];
+
+                    if (val > 0.1) {
+                        const size = gridSize * (0.2 + 0.8 * val);
+                        const alpha = 0.3 + 0.7 * val;
+                        ctx.fillStyle = `rgba(200, 200, 200, ${alpha})`;
+                        ctx.fillRect(
+                            x * gridSize - gridSize/2,
+                            y * gridSize - gridSize/2,
+                            size, size
+                        );
+                    }
+                }
+            }
+        }
+
+        function animate() {
+            update();
+            draw();
+            requestAnimationFrame(animate);
+        }
+
+        animate();
+    </script>
+</body>
+</html>