Global TurnEntity in parent's local space?

[Canardia]

I can't figure out how to turn a mesh around an axis which is the parent entity's local axis.

I have 3 nested rings, where ring1 is the outer ring. These 4 lines of code work fine, but I can't figure out how to turn ring2 around ring1's local axis. Ring1's parent is the world, so I can use the global parameter to turn it in the world's "local" space (which is ring1's global space).

	EntityParent(ring2,ring1);
EntityParent(ring3,ring2);

	TurnEntity(ring1, Vec3(0,0,1), 1);
TurnEntity(ring1, Vec3(0,1,0)   );
TurnEntity(ring2, Vec3(1,0,0)   );
//TurnEntity(ring2, Vec3(0,1,0)   ); // doesn't work right
TurnEntity(ring3, Vec3(0,0,1)     );
//TurnEntity(ring3, Vec3(0,1,0)   ); // doesn't work right

[Canardia]

Ahh, I found the solution, TFormVector does exactly what I want: It transforms a vector from another entity's space to another entity's space, so now everything works perfectly:

TurnEntity(ring1, Vec3(0,0, ringspeed1*AppSpeed()), 1);
TurnEntity(ring1, Vec3(0, ringspeed2*AppSpeed(),0)   );
TurnEntity(ring2, TFormVector(Vec3(ringspeed1*AppSpeed(),0,0),ring1,ring2));
TurnEntity(ring2, Vec3(0, ringspeed2*AppSpeed(),0)   );
TurnEntity(ring3, TFormVector(Vec3(0,0,ringspeed1*AppSpeed()),ring2,ring3));
TurnEntity(ring3, Vec3(0, ringspeed2*AppSpeed(),0)   );