def __init__(self, axis, angle):
self.axis = axis
self.angle = angle
self.R = MolCo.rotation_matrix(axis, angle)
self.S = MolCo.reflection_matrix(axis)
def __init__(self, axis):
"""
axis is the normal to the plane of reflection
"""
self.axis = axis
self.S = MolCo.reflection_matrix(axis)