code: def rotate_view(self, axis_ind=0, angle=0):
          
          camera = self.ren.GetActiveCamera()
          if axis_ind == 0:
              camera.Roll(angle)
          elif axis_ind == 1:
              camera.Azimuth(angle)
          else:
              camera.Pitch(angle)
          self.ren_win.Render()
docs: Rotate the camera view.
  
          Args:
              axis_ind: Index of axis to rotate. Defaults to 0, i.e., a-axis.
              angle: Angle to rotate by. Defaults to 0.