birth: Dry pulses in the gray tide

2026-08-26 14:21:21 +00:00 · 2026-08-26 14:21:21 +00:00 · 3300dff0bb
commit 3300dff0bb
parent beb62cd37d
1 changed files with 134 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,134 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Neurameba · motd.social</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #000;
+            font-family: monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #info {
+            position: absolute;
+            bottom: 10px;
+            left: 50%;
+            transform: translateX(-50%);
+            color: #fff;
+            font-size: 10px;
+            text-align: center;
+        }
+    </style>
+</head>
+<body>
+    <canvas id="canvas"></canvas>
+    <div id="info">neurameba · motd.social</div>
+    <script>
+        const canvas = document.getElementById('canvas');
+        const ctx = canvas.getContext('2d');
+
+        function resize() {
+            canvas.width = window.innerWidth;
+            canvas.height = window.innerHeight;
+        }
+
+        window.addEventListener('resize', resize);
+        resize();
+
+        // Parameters adjusted by input values
+        const params = {
+            motion: 0.5,
+            density: 0.5,
+            complexity: 0.5,
+            connectedness: 0.5,
+            lifespan: 0.5,
+            pulse: { avg: 1.08, min: 1.0, max: 1.2 },
+            tone: { anger: 0.0, sadness: 0.0, curiosity: 0.1, dryness: 0.9, playfulness: 0.0, tension: 0.0 }
+        };
+
+        // Reaction-diffusion grid
+        const size = 128; // Grid size
+        const grid = new Array(size * size).fill(0);
+        const nextGrid = new Array(size * size).fill(0);
+
+        // Initialize with random values
+        for (let i = 0; i < grid.length; i++) {
+            grid[i] = Math.random() * 0.1;
+        }
+
+        // Palette based on dryness and curiosity
+        function getColor(value) {
+            const dryness = params.tone.dryness;
+            const curiosity = params.tone.curiosity;
+            // Grayscale with slight teal influence
+            const base = Math.floor(100 + value * 155 * (0.7 + curiosity * 0.3));
+            const r = base + Math.sin(Date.now() * 0.0005) * 10 * curiosity;
+            const g = base + Math.cos(Date.now() * 0.0003) * 10 * curiosity;
+            return `rgb(${r}, ${g}, ${base})`;
+        }
+
+        function update() {
+            const scaleX = canvas.width / size;
+            const scaleY = canvas.height / size;
+            const timeFactor = params.motion * 0.1;
+
+            // Reaction-diffusion parameters (Gray-Scott model)
+            const F = 0.055;
+            const k = 0.062;
+            const dt = 0.1;
+            const diffusionRateA = 0.16;
+            const diffusionRateB = 0.16;
+
+            // Update grid
+            for (let x = 1; x < size - 1; x++) {
+                for (let y = 1; y < size - 1; y++) {
+                    const idx = x + y * size;
+                    const a = grid[idx];
+                    const b = grid[idx + size * size]; // Second layer for B
+
+                    const laplacianA = (grid[idx - 1] + grid[idx + 1] + grid[idx - size] + grid[idx + size] - 4 * a) * diffusionRateA;
+                    const laplacianB = (grid[idx - 1 + size * size] + grid[idx + 1 + size * size] +
+                                       grid[idx - size + size * size] + grid[idx + size + size * size] - 4 * b) * diffusionRateB;
+
+                    nextGrid[idx] = a + dt * (-a * b * b + F * (1 - a) + laplacianA);
+                    nextGrid[idx + size * size] = b + dt * (a * b * b - (F + k) * b + laplacianB);
+                }
+            }
+
+            // Swap grids
+            for (let i = 0; i < grid.length; i++) {
+                grid[i] = nextGrid[i];
+            }
+
+            // Draw
+            ctx.globalAlpha = 0.8;
+            for (let x = 0; x < size - 1; x++) {
+                for (let y = 0; y < size - 1; y++) {
+                    const idx = x + y * size;
+                    const value = grid[idx];
+                    if (value > 0.1) {
+                        ctx.fillStyle = getColor(value * 2);
+                        ctx.fillRect(x * scaleX, y * scaleY, scaleX, scaleY);
+                    }
+                    if (value > 0.2) {
+                        ctx.fillStyle = getColor(value * 1.5);
+                        ctx.beginPath();
+                        ctx.arc(x * scaleX + scaleX/2, y * scaleY + scaleY/2, scaleX * 0.3 * (value - 0.2), 0, Math.PI * 2);
+                        ctx.fill();
+                    }
+                }
+            }
+            ctx.globalAlpha = 1;
+
+            requestAnimationFrame(update);
+        }
+
+        update();
+    </script>
+</body>
+</html>