Interface PhysicsSystemOptions

Whether this system also dispatches its worlds' queued events (§39 step 9).

Defaults to true, which is the behaviour every application and every §33 golden has had since P5-2: solve, then dispatch, both at step 6's priority.

Pass false to move dispatch to its own §39 priority with PhysicsEventSystem (PH-21) — see that class for what the split changes. A system constructed with false whose dispatch nobody claims never delivers anything, and each world's queue grows without bound — so the first such fixed step warns once (see PhysicsSystem.claimEventDispatch). That is why true remains the default.

Execution order key (§39). Defaults to PRIORITY_PHYSICS_SOLVE (600) — step 6, "physics solve". Read once, at registration, like every other system's priority.

Worlds to track immediately, in order. Equivalent to calling PhysicsSystem.track for each, which is what the constructor does.