Demo 3: Tumble Tower — Stage 1 physics (rotation + angular, OBB contacts) #232
Description
Goal: extend Tumble Tower physics to support rotation and angular dynamics deterministically.
Scope
- Oriented boxes (OBB) with rotation.
- Angular velocity and torque.
- Deterministic contact manifold generation (stable ordering of contact points).
- Deterministic constraint solver ordering.
Acceptance criteria
- Stage 0 scenarios remain deterministic.
- A rotation-specific test suite pins contact generation and stacking behavior.