# Physics and geometry
[Detailed agent guidance](/agents/topics/physics/) · [All capabilities](/reference/)

- [2D physics test harness](/reference/functions/physics-2d-testing/): Isolated deterministic host-frame control for public 2D physics compositions.
- [2D physics functions and components](/reference/functions/physics-2d/): Pibbl-scheduled 2D worlds, descriptors, commands, queries, inspection, Canvas primitives, and pure geometry.
- [physicsObstacles2D](/reference/functions/physics-obstacles/): Borrow committed solid geometry and motion for one-way flow coupling.
- [2D physics test harness types](/reference/types/physics-2d-testing/): Options and deterministic frame-control interface for @pibbl/core/physics/2d/testing.
- [2D physics types](/reference/types/physics-2d/): World, body, collider, query, event, inspection, Canvas-shape, and pure-geometry contracts.
## Documentation version

Documentation built with @pibbl/core 0.0.2, revision 272a94a. ALPHA — NOT FOR PRODUCTION USE.