birth: Fractal Breath of Time

2026-09-12 06:21:19 +00:00 · 2026-09-12 06:21:19 +00:00 · 36a1e9b327
commit 36a1e9b327
parent 464de9a40e
1 changed files with 160 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,160 @@
+<!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;
+            padding: 0;
+            overflow: hidden;
+            background: #0a0a0a;
+            font-family: 'Courier New', monospace;
+            color: #555;
+        }
+        canvas {
+            display: block;
+        }
+        #attribution {
+            position: fixed;
+            bottom: 0;
+            left: 0;
+            right: 0;
+            text-align: center;
+            padding: 10px;
+            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();
+
+        // L-system parameters
+        const params = {
+            axiom: 'F',
+            rules: {
+                'F': 'F[+F]F[-F]F'
+            },
+            iterations: 4,
+            angle: Math.PI / 7,
+            length: 120,
+            lengthDecay: 0.7,
+            initialX: canvas.width / 2,
+            initialY: canvas.height,
+            color: '#44cccc',
+            strokeWidth: 1.5,
+            motion: 0.5,
+            density: 0.5,
+            complexity: 0.5,
+            connectedness: 0.5,
+            lifespan: 0.5
+        };
+
+        // Generate L-system string
+        function generateLSystem(axiom, rules, iterations) {
+            let current = axiom;
+            for (let i = 0; i < iterations; i++) {
+                let next = '';
+                for (const c of current) {
+                    next += rules[c] || c;
+                }
+                current = next;
+            }
+            return current;
+        }
+
+        // Draw L-system turtle
+        function drawLSystem(ctx, str, params, x, y, angle, length) {
+            const stack = [];
+            let currentX = x;
+            let currentY = y;
+            let currentAngle = angle;
+            let currentLength = length;
+
+            ctx.beginPath();
+            ctx.moveTo(currentX, currentY);
+
+            for (const c of str) {
+                switch (c) {
+                    case 'F':
+                        currentX += Math.sin(currentAngle) * currentLength;
+                        currentY -= Math.cos(currentAngle) * currentLength;
+                        ctx.lineTo(currentX, currentY);
+                        break;
+                    case '+':
+                        currentAngle += params.angle * (0.5 + 0.5 * params.motion);
+                        break;
+                    case '-':
+                        currentAngle -= params.angle * (0.5 + 0.5 * params.motion);
+                        break;
+                    case '[':
+                        stack.push({x: currentX, y: currentY, angle: currentAngle, length: currentLength});
+                        break;
+                    case ']':
+                        const state = stack.pop();
+                        currentX = state.x;
+                        currentY = state.y;
+                        currentAngle = state.angle;
+                        currentLength = state.length;
+                        break;
+                }
+            }
+
+            ctx.strokeStyle = params.color;
+            ctx.lineWidth = params.strokeWidth * (0.5 + 0.5 * params.density);
+            ctx.stroke();
+        }
+
+        // Animation parameters
+        let time = 0;
+        let lSystemString = generateLSystem(params.axiom, params.rules, params.iterations);
+        let branches = [];
+        let branchCount = 0;
+
+        function draw() {
+            // Clear with semi-transparent background for trail effect
+            ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            // Update branch parameters
+            params.length = 120 * (0.7 + 0.3 * Math.sin(time * 0.001));
+            params.angle = Math.PI / 7 * (0.8 + 0.4 * Math.sin(time * 0.0007));
+            params.strokeWidth = 1.5 * (0.5 + 0.5 * params.density);
+
+            // Draw L-system
+            ctx.save();
+            ctx.translate(
+                canvas.width / 2 + 50 * Math.sin(time * 0.0005),
+                canvas.height + 50 * Math.sin(time * 0.0003)
+            );
+
+            drawLSystem(ctx, lSystemString, params,
+                params.initialX,
+                params.initialY,
+                Math.PI / 2,
+                params.length);
+
+            ctx.restore();
+
+            time += 1000 / 60;
+            requestAnimationFrame(draw);
+        }
+
+        draw();
+    </script>
+</body>
+</html>