Simulation
Physics runs simulation steps for bodies, Characters, and collision. Rendering and script calls do not define the physics timestep.
Script controls
Scripts set intent or use supported physics controls. The engine owns gravity, collision, and body movement. Contact events enter the script event queue. Check the object type supplied by each contact path when changing callback behavior.
Contributor checks
Test solid and trigger contacts separately. Test both Character-to-Cell and Entity-to-Entity contacts. For game authors, see Physics and Events.