birth: Fractal Echoes of Motion

2026-05-22 21:47:18 +00:00 · 2026-05-22 21:47:18 +00:00 · 1bf0796c82
commit 1bf0796c82
parent 4eecba3926
1 changed files with 178 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,178 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Strange Attractor | neurameba</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #0a0a0a;
+            font-family: 'Courier New', monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #attribution {
+            position: fixed;
+            bottom: 20px;
+            right: 20px;
+            color: #444;
+            font-size: 10px;
+            font-family: monospace;
+            text-shadow: 0 0 5px rgba(0,0,0,0.5);
+        }
+    </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();
+
+        // Strange attractor parameters
+        const params = {
+            a: 1.5,
+            b: 0.3,
+            c: 1.0,
+            d: 0.3,
+            e: 0.1,
+            f: 0.0,
+            scale: 0.5,
+            motion: 0.5,
+            density: 0.5,
+            complexity: 0.5,
+            connectedness: 0.5,
+            lifespan: 0.5,
+            pulseFactor: 1.03
+        };
+
+        // Color palette (dryness/monochrome)
+        const colors = [
+            {r: 255, g: 255, b: 255, a: 0.1},
+            {r: 200, g: 200, b: 200, a: 0.2},
+            {r: 150, g: 150, b: 150, a: 0.3},
+            {r: 100, g: 100, b: 100, a: 0.4}
+        ];
+
+        // Particle system
+        const particles = [];
+        const maxPoints = Math.floor(200 + 200 * params.complexity);
+        const trailLength = Math.floor(5 + 15 * params.connectedness);
+
+        class Particle {
+            constructor() {
+                this.reset();
+                this.trail = [];
+            }
+
+            reset() {
+                this.x = Math.random() * canvas.width;
+                this.y = Math.random() * canvas.height;
+                this.prevX = this.x;
+                this.prevY = this.y;
+                this.size = 0.5 + Math.random() * 1.5;
+                this.life = 0;
+                this.maxLife = 50 + Math.random() * 100;
+            }
+
+            update() {
+                this.prevX = this.x;
+                this.prevY = this.y;
+
+                // Strange attractor equations (modified Rössler attractor)
+                const x = this.x - canvas.width/2;
+                const y = this.y - canvas.height/2;
+
+                const a = params.a * 0.5;
+                const b = params.b;
+                const c = params.c;
+                const d = params.d * (0.5 + params.connectedness * 0.5);
+                const e = params.e;
+                const pulse = params.pulseFactor;
+
+                const dt = 0.01 * (0.5 + params.motion * 0.5);
+
+                const dx = (-y - z) * dt * pulse;
+                const dy = (x + a*y) * dt * pulse;
+                const dz = (b + z*(x - c)) * dt * pulse;
+                z = z + dz;
+
+                this.x += dx * params.scale * (0.8 + params.density * 0.4);
+                this.y += dy * params.scale * (0.8 + params.density * 0.4);
+
+                this.life++;
+
+                // Trail
+                this.trail.push({x: this.x, y: this.y});
+                if (this.trail.length > trailLength) {
+                    this.trail.shift();
+                }
+
+                // Reset if too old or out of bounds
+                if (this.life > this.maxLife ||
+                    this.x < -100 || this.x > canvas.width + 100 ||
+                    this.y < -100 || this.y > canvas.height + 100) {
+                    this.reset();
+                }
+            }
+
+            draw() {
+                ctx.strokeStyle = `rgba(${colors[Math.floor(Math.random() * colors.length)].r},
+                                     ${colors[Math.floor(Math.random() * colors.length)].g},
+                                     ${colors[Math.floor(Math.random() * colors.length)].b},
+                                     ${colors[Math.floor(Math.random() * colors.length)].a})`;
+                ctx.lineWidth = this.size;
+
+                ctx.beginPath();
+                ctx.moveTo(this.prevX, this.prevY);
+
+                for (let i = 0; i < this.trail.length; i++) {
+                    const point = this.trail[i];
+                    const alpha = i / this.trail.length;
+                    ctx.globalAlpha = alpha * colors[0].a;
+                    ctx.lineTo(point.x, point.y);
+                }
+
+                ctx.stroke();
+                ctx.globalAlpha = 1.0;
+            }
+        }
+
+        // Initialize particles
+        for (let i = 0; i < maxPoints; i++) {
+            particles.push(new Particle());
+        }
+
+        let z = 0;
+        let frameCount = 0;
+
+        function animate() {
+            frameCount++;
+
+            // Clear with fade effect
+            ctx.fillStyle = 'rgba(10, 10, 10, 0.05)';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            // Update and draw particles
+            particles.forEach(p => {
+                p.update();
+                p.draw();
+            });
+
+            requestAnimationFrame(animate);
+        }
+
+        animate();
+    </script>
+</body>
+</html>