birth: Fading Fractal Echoes

2026-04-28 21:47:18 +00:00 · 2026-04-28 21:47:18 +00:00 · 30d4d14549
commit 30d4d14549
parent bc7b187ed9
1 changed files with 166 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,166 @@
+```html
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Cellular Nebula</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #000;
+            font-family: monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #attribution {
+            position: absolute;
+            bottom: 10px;
+            right: 10px;
+            color: #fff;
+            font-size: 10px;
+            text-shadow: 0 0 5px rgba(0, 188, 212, 0.5);
+        }
+    </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 resize() {
+            canvas.width = window.innerWidth;
+            canvas.height = window.innerHeight;
+        }
+        window.addEventListener('resize', resize);
+        resize();
+
+        // Parameters derived from input
+        const MOTION = 0.5;
+        const DENSITY = 0.5;
+        const COMPLEXITY = 0.5;
+        const CONNECTEDNESS = 0.5;
+        const LIFESPAN = 0.5;
+        const PULSE_AVG = 1.11;
+        const DRYNESS = 0.9;
+
+        // Cellular automata grid
+        const GRID_SIZE = 64;
+        const CELL_SIZE = Math.min(canvas.width, canvas.height) / GRID_SIZE;
+        const cols = Math.ceil(canvas.width / CELL_SIZE);
+        const rows = Math.ceil(canvas.height / CELL_SIZE);
+
+        // Initialize grid
+        let grid = new Array(rows).fill().map(() =>
+            new Array(cols).fill().map(() => Math.random() > 0.5 ? 1 : 0)
+        );
+
+        // Neighborhood types (Moore neighborhood with varying range)
+        const NEIGHBORHOOD = Math.max(1, Math.floor(COMPLEXITY * 4));
+
+        // Colors based on dryness (monochrome)
+        const BASE_HUE = 0;
+        const SATURATION = 0;
+        const LIGHTNESS = DRYNESS > 0.8 ? 90 : 70;
+
+        function drawCell(x, y, alive, age) {
+            if (!alive) return;
+
+            const hue = BASE_HUE;
+            const saturation = SATURATION;
+            const lightness = LIGHTNESS - (age * 5);
+            const alpha = DRYNESS > 0.7 ? 0.3 + (age * 0.05) : 0.5;
+
+            ctx.fillStyle = `hsla(${hue}, ${saturation}%, ${lightness}%, ${alpha})`;
+            ctx.fillRect(x * CELL_SIZE, y * CELL_SIZE, CELL_SIZE, CELL_SIZE);
+        }
+
+        function countAliveNeighbors(x, y) {
+            let count = 0;
+            for (let i = -NEIGHBORHOOD; i <= NEIGHBORHOOD; i++) {
+                for (let j = -NEIGHBORHOOD; j <= NEIGHBORHOOD; j++) {
+                    if (i === 0 && j === 0) continue;
+                    const nx = x + i;
+                    const ny = y + j;
+                    if (nx >= 0 && nx < cols && ny >= 0 && ny < rows) {
+                        count += grid[ny][nx];
+                    }
+                }
+            }
+            return count;
+        }
+
+        const rules = [
+            // Survival rules (B/S)
+            { births: [3], survive: [2, 3], complexity: 0.3 },
+            // Apoptosis rules (more death)
+            { births: [4], survive: [2], complexity: 0.7 },
+            // Aging rules (LIFESPAN affects decay)
+            { births: [3], survive: [2, 3], maxAge: 20, complexity: 0.5 }
+        ];
+
+        // Select active rule based on parameters
+        const activeRule = rules[Math.floor(COMPLEXITY * rules.length)];
+
+        function updateGrid() {
+            const newGrid = grid.map(arr => [...arr]);
+            const ageGrid = grid.map(arr => [...arr].map(cell => cell * (Math.random() * 0.5 + 0.5)));
+
+            for (let y = 0; y < rows; y++) {
+                for (let x = 0; x < cols; x++) {
+                    const alive = grid[y][x];
+                    const neighbors = countAliveNeighbors(x, y);
+                    const isBirth = activeRule.births.includes(neighbors);
+                    const isSurvive = activeRule.survive.includes(neighbors);
+                    const maxAge = activeRule.maxAge || 10;
+
+                    if (!alive && isBirth) {
+                        newGrid[y][x] = 1;
+                        ageGrid[y][x] = 0;
+                    } else if (alive && !isSurvive) {
+                        newGrid[y][x] = 0;
+                        ageGrid[y][x] = 0;
+                    } else if (alive) {
+                        ageGrid[y][x] += 0.01 * MOTION * PULSE_AVG;
+                        if (ageGrid[y][x] > maxAge) {
+                            newGrid[y][x] = 0;
+                        }
+                    }
+                }
+            }
+
+            grid = newGrid;
+        }
+
+        let age = 0;
+        function animate() {
+            ctx.fillStyle = 'rgba(0, 10, 20, 0.05)';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            updateGrid();
+            drawGrid();
+
+            age++;
+            requestAnimationFrame(animate);
+        }
+
+        function drawGrid() {
+            for (let y = 0; y < rows; y++) {
+                for (let x = 0; x < cols; x++) {
+                    drawCell(x, y, grid[y][x], ageGrid[y][x]);
+                }
+            }
+        }
+
+        // Initialize age grid
+        const ageGrid = grid.map(arr => [...arr].map(cell => cell * (Math.random() * 0.5 + 0.5)));
+
+        animate();
+    </script>
+</body>
+</html>
+```