fixedUpdate method
Called once per fixed physics step while the component is mounted,
enabled, and loaded. fixedDt is the fixed timestep of the
surrounding PhysicsWorld, not the frame interval.
Runs before update for the same frame and may run several times per frame when the renderer falls behind the physics rate. Most components should not override this; it exists for behavior that must advance on the physics clock (kinematic body controllers, character motion drivers).
Implementation
void fixedUpdate(double fixedDt) {}