# The corresponding quaternions and cms are stored in their corresponding matrix.
rbtPerGroup['quaternions']=rbt.quaternions
rbtPerGroup['com']=rbt.cms
rbtPerGroup['fit']=rbt.fit
defrun_step(self,index):
'''
'''
# Can not use the centers of mass defined by rbt.cms because the reference frame selected can be out of the selected frames for the Rigid Body Trajectory.