birth: Flowing Particles in Emptiness

2026-06-29 13:47:16 +00:00 · 2026-06-29 13:47:16 +00:00 · 46e5d090a2
commit 46e5d090a2
parent 41842fff29
1 changed files with 113 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,113 @@
+```html
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Flow Field</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #000;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            height: 100vh;
+            font-family: monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #attribution {
+            position: absolute;
+            bottom: 10px;
+            color: #fff;
+            font-size: 10px;
+            mix-blend-mode: difference;
+        }
+    </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
+        const motion = 0.5;
+        const density = 0.5;
+        const complexity = 0.5;
+        const connectedness = 0.5;
+        const lifespan = 0.5;
+
+        // Flow field parameters
+        const particleCount = 200 * density;
+        const particles = Array(particleCount).fill().map(() => ({
+            x: Math.random() * canvas.width,
+            y: Math.random() * canvas.height,
+            vx: 0,
+            vy: 0,
+            size: 2 + Math.random() * 3 * complexity,
+            life: Math.random() * 100 * lifespan
+        }));
+
+        const timeScale = 0.001 + motion * 0.01;
+        const colorVariation = dryness * 0.3;
+
+        function draw() {
+            // Clear with semi-transparent to create trails
+            ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
+            ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+            // Update particles
+            particles.forEach(p => {
+                // Flow field based on noise
+                const nx = p.x / canvas.width * 5;
+                const ny = p.y / canvas.height * 5;
+                const angle = Math.sin(nx * 10 + performance.now() * timeScale * 0.1) *
+                              Math.cos(ny * 10 + performance.now() * timeScale * 0.1);
+
+                p.vx = Math.cos(angle) * motion * 2;
+                p.vy = Math.sin(angle) * motion * 2;
+
+                p.x += p.vx;
+                p.y += p.vy;
+
+                // Wrap around edges
+                if (p.x < 0) p.x = canvas.width;
+                if (p.x > canvas.width) p.x = 0;
+                if (p.y < 0) p.y = canvas.height;
+                if (p.y > canvas.height) p.y = 0;
+
+                // Trail effect with life
+                const alpha = Math.min(1, p.life / 100) * (1 - colorVariation);
+                ctx.fillStyle = `rgba(255, 255, 255, ${alpha})`;
+                ctx.beginPath();
+                ctx.arc(p.x, p.y, p.size * (0.5 + Math.random() * 0.5 * complexity), 0, Math.PI * 2);
+                ctx.fill();
+
+                p.life--;
+                if (p.life <= 0) {
+                    p.x = Math.random() * canvas.width;
+                    p.y = Math.random() * canvas.height;
+                    p.life = 100;
+                }
+            });
+
+            requestAnimationFrame(draw);
+        }
+
+        draw();
+    </script>
+</body>
+</html>
+```