🎄 Christmas Market Planner: Crowd Flow, Queues and Warm Lights

Plan a snowy Christmas market: place stalls, paths, lanterns and heaters, then open the evening and watch hundreds of guests choose stalls, queue and crowd around the tree and a narrow stone bridge. Real Erlang C queue theory, Weidmann crowd speed, Fruin comfort levels, inverse-square lighting and a power budget, with a built-in queue lab.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install