physics-2d

Register the physics2d() extension when creating the app, then add a collider such as BoxCollider2D to make an entity solid and a Rigidbody2D to make it move. The simulation runs on the engine's fixed loop in metres and seconds.

Add a CharacterController2D component and call controller.move(delta) from fixedUpdate each step. The controller is purely kinematic, so your script owns gravity, jump velocity, and coyote time; read isGrounded and groundNormal for state.

Yes. It depends on @dimforge/rapier2d-compat, which inlines its WebAssembly as base64, so Node, browsers, and Electron all take the same path with nothing extra to serve. It also runs headless with no GPU.

Physics queries need one completed simulation step because Rapier builds its broadphase inside step. Call app.step(1/60) once before calling app.physics2d.raycast, otherwise the query throws error IGX-1153.

PolygonCollider2D builds the convex hull of its points, so concave outlines are silently filled in; use multiple polygons instead. EdgeCollider2D is infinitely thin, so fast bodies can tunnel through it and it suits only static level geometry.

No. The character controller filters sensors out of its collide-and-slide sweep, so it passes through isTrigger colliders at full speed while onTriggerEnter and onTriggerExit still fire on both entities.