Draw the world
Walls, borders and goals, placed with a pointer or a finger. Routes come from Dijkstra over a visibility graph, rebuilt from the geometry every time you change it.
Pedestrian simulator
Walky
Draw walls, mark a goal, paint a crowd, and watch it find its way.
A 2016 Java and Swing school project by Pascal Andermatt and Jan Huber, rebuilt twice over: a native iOS app, and a page that runs the whole simulation in your browser with no backend behind it.
Built with love in Zurich, Switzerland 🇨🇭
What it does
A room, a crowd, and no instructions.
Every pedestrian routes itself. Nothing is scripted, and nothing is sent anywhere.
Paint a crowd
Each pedestrian picks its own next step and takes the colour of the goal it is heading for. It turns black when it arrives — the way the 2016 original drew it.
Share the map as a link
The whole scenario is deflated into the URL fragment. A fragment is never sent in the request, so no backend sees your map — because there is no backend.
On iPhone
Draw it, measure it, or import it.
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Draw a room, paint a crowd, and watch two hundred people find the gap.
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Price the walk between two points: 276 m across the map, against Apple Maps' 522 m on real pavements.
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Type One Apple Park Way, Cupertino — or any address — and walk a crowd through it.
The Swift model is checked against the TypeScript one bit for bit — the same crowd, the same arithmetic, on both. How that works ›