birth: Static Surface Drifting

2026-08-27 22:21:21 +00:00 · 2026-08-27 22:21:21 +00:00 · 96eaaec493
commit 96eaaec493
parent 5ed6f7f4be
1 changed files with 165 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,165 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Static Surface</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #0a0a0a;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            height: 100vh;
+            font-family: monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #attribution {
+            position: fixed;
+            bottom: 20px;
+            color: #555;
+            font-size: 10px;
+            text-align: center;
+            width: 100%;
+            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();
+
+        // Parameters from prompt
+        const params = {
+            motion: 0.5,
+            density: 0.5,
+            complexity: 0.5,
+            connectedness: 0.5,
+            lifespan: 0.5,
+            pulse: { avg: 1.25, min: 1.0, max: 1.55 },
+            tone: { anger: 0.0, sadness: 0.0, curiosity: 0.1, dryness: 0.9, playfulness: 0.0, tension: 0.0 }
+        };
+
+        // Reaction-diffusion simulation
+        const size = 100;
+        const grid = Array(size).fill().map(() =>
+            Array(size).fill().map(() =>
+                [Math.random() * 0.1, Math.random() * 0.1]
+            )
+        );
+
+        const next = Array(size).fill().map(() =>
+            Array(size).fill().map(() => [0, 0])
+        );
+
+        const feed = 0.055;
+        const kill = 0.062;
+        const diffA = 1.0;
+        const diffB = 0.5;
+        const dt = 1.0;
+
+        function update() {
+            for (let x = 1; x < size - 1; x++) {
+                for (let y = 1; y < size - 1; y++) {
+                    const a = grid[x][y][0];
+                    const b = grid[x][y][1];
+
+                    const laplacianA = (grid[x-1][y][0] + grid[x+1][y][0] +
+                                       grid[x][y-1][0] + grid[x][y+1][0] -
+                                       4 * a) * diffA;
+                    const laplacianB = (grid[x-1][y][1] + grid[x+1][y][1] +
+                                       grid[x][y-1][1] + grid[x][y+1][1] -
+                                       4 * b) * diffB;
+
+                    const reaction = a * b * b;
+
+                    next[x][y][0] = a + (dt * (laplacianA - reaction));
+                    next[x][y][1] = b + (dt * (laplacianB + reaction));
+
+                    // Clamping
+                    next[x][y][0] = Math.max(0, Math.min(next[x][y][0], 1));
+                    next[x][y][1] = Math.max(0, Math.min(next[x][y][1], 1));
+                }
+            }
+
+            // Swap grids
+            [grid, next].forEach((arr, i) => {
+                for (let x = 0; x < size; x++) {
+                    for (let y = 0; y < size; y++) {
+                        arr[x][y][0] = next[x][y][0];
+                        arr[x][y][1] = next[x][y][1];
+                    }
+                }
+            });
+        }
+
+        function draw() {
+            const scale = Math.min(canvas.width, canvas.height) / size;
+            const offsetX = (canvas.width - size * scale) / 2;
+            const offsetY = (canvas.height - size * scale) / 2;
+
+            ctx.fillStyle = '#000000';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            for (let x = 0; x < size; x++) {
+                for (let y = 0; y < size; y++) {
+                    const a = grid[x][y][0];
+                    const b = grid[x][y][1];
+
+                    if (b > 0.06) { // Only draw when B is sufficiently active
+                        const intensity = Math.min(1, b * 2);
+                        ctx.fillStyle = `rgba(255, 255, 255, ${intensity * 0.8})`;
+                        ctx.beginPath();
+                        ctx.arc(
+                            offsetX + x * scale + scale/2,
+                            offsetY + y * scale + scale/2,
+                            scale * 0.3 * (0.5 + intensity * 0.5),
+                            0, Math.PI * 2
+                        );
+                        ctx.fill();
+                    }
+                }
+            }
+
+            // Add some structure to the noise
+            ctx.lineWidth = scale * 0.1;
+            ctx.strokeStyle = `rgba(200, 200, 200, 0.3)`;
+
+            for (let i = 0; i < 50; i++) {
+                const x1 = Math.floor(Math.random() * size);
+                const y1 = Math.floor(Math.random() * size);
+                const x2 = Math.floor(Math.random() * size);
+                const y2 = Math.floor(Math.random() * size);
+
+                ctx.beginPath();
+                ctx.moveTo(offsetX + x1 * scale + scale/2, offsetY + y1 * scale + scale/2);
+                ctx.lineTo(offsetX + x2 * scale + scale/2, offsetY + y2 * scale + scale/2);
+                ctx.stroke();
+            }
+        }
+
+        function animate() {
+            update();
+            draw();
+            requestAnimationFrame(animate);
+        }
+
+        animate();
+    </script>
+</body>
+</html>