code: def add_axes_at_origin(self):
          
          self.marker_actor = vtk.vtkAxesActor()
          # renderer = self.renderers[self.loc_to_index(loc)]
          self.AddActor(self.marker_actor)
          self.parent._actors[str(hex(id(self.marker_actor)))] = self.marker_actor
          return self.marker_actor
docs: Add axes actor at origin
  
          Returns
          --------
          marker_actor : vtk.vtkAxesActor
              vtkAxesActor actor