sub clearActorForces( actor)

Resets or clears all the forces and torques that have been applied to a rigid body in the current simulation step. This ensures that any forces, including linear forces and torques, do not accumulate from one simulation step to the next.

Notes:

• Resets Forces: It removes all linear forces (like those applied by applyActorForce or applyActorCentralForce) and torques (like those applied by applyActorTorque).
• Does Not Affect Velocity: It clears only the applied forces and torques, but the current velocity (linear and angular) of the actor remains unchanged.
• Typically Used in Each Simulation Step: Used to reset forces after each step, so that only new forces applied in the next step will affect the body.