objectHandle: handle of the object. Can be combined with sim.handleflag_reljointbaseframe (see next argument)
relativeToObjectHandle: indicates relative to which reference frame the orientation is specified. Specify -1 to set the absolute orientation, sim_handle_parent to set the orientation relative to the object's parent, or an object handle relative to whose reference frame the orientation is specified. If this handle is the handle of a joint, then the orientation is applied relative to the joint's moving frame (unless objectHandle is combined with sim.handleflag_reljointbaseframe, in which case the orientation is applied relative to the joint's base frame).
eulerAngles: Euler angles (alpha, beta and gamma)