I don't have an answer because I don't know anything about pre-made physics engines, but I will talk about physics.
The artificial gravity of rotating things isn't as simple as a force pointing outward (centrifugal force). There is a coriollis force
too, which is felt as things move radially in or out. If you have things jumping across the station, the coriolis force becomes rather important.
Constant gravity is with a vector (0, 0, -g), where g is the force of gravity.
When we're dealing with central force fields from rotating frames of reference, we first derive this equation for acceleration: