In physics, action is a numerical value describing how a physical system has changed over time.
In Havok, hkpAction is an abstract class. And every child class of hkpAction implement the applyAction() pure virtual function. Once an hkpAction is added to the world, applyAction() is automatically called during every tick.
For example, you can add force, impulse to rigid body in hkpAction().
So I wanna know if there a class can do the same things like Havok did. Or I can define an UMyGameAction class, and set tick group as TG_DuringPhysics.
In UE5, there is a delegate
FCalculateCustomPhysics