easy z axis?

TForm-commands are good for this

TFormPoint 0, 0, 1, mesh, 0
VectorX# = TFormedX()
VectorY#...

If you want to know the heading of an entity, try something like

TFormVector 0, 0, 1, mesh, 0
MeshYaw = VectorYaw(TFormedX(), TFormedY(), TFormedZ())
MeshPitch = VectorPitch(TFormedX(), TFormedY(), TFormedZ())