LavaRand Wall

A browser recreation of Cloudflare's lava-lamp entropy wall: a wall of simulated lava lamps, photographed by a virtual camera, hashed with SHA-256, and mixed into an entropy pool.

Run

npm install
npm run dev

Open http://localhost:5173.

How it works

1. Physics (CPU): each lamp runs a small blob simulation: heat near the bulb, buoyancy from a density crossover, soft separation, rare merges, and splits. Lamps warm up slowly when switched on and cool when switched off.
2. Render (WebGL2): one fullscreen fragment shader draws every lamp as a tapered glass vessel with a silver base and cap, colored liquid, and metaball wax lit from below.
3. Camera: every few seconds (or on demand) the app reads the canvas pixels, SHA-256s them, and mixes the digest into an entropy pool along with frame-timing jitter and mouse noise.
4. Output: the pool derives UUIDs, dice rolls, coin flips, and passwords. Click a value in the sidebar to copy it.