SetModelingAxisToPointObject.py

import c4d

def apply_axis(op,new_m):
    
    loc_m = ~new_m * op.GetMg() #Get local matrix

    op.SetAllPoints([loc_m.Mul(p) for p in op.GetAllPoints()])
    op.SetMg(new_m)
    
    op.Message(c4d.MSG_UPDATE)
    c4d.EventAdd()

def main():

    if not op or not isinstance(op,c4d.PointObject):
        c4d.gui.MessageDialog('Please select spline or polygon object')
        return

    apply_axis(op, op.GetModelingAxis(doc))


if __name__ == '__main__':
    main()