[vtkusers] How can I reset the carmera

[455535440]

hello everyone：
  I got an actor rendered on the vtkRenderer, Then I use the Interactor move and rotate the actor, but after that I want to make the actor undo all the action so that the actor should look like it first display.
  I call the method vtkRenderer::ResetCamera ,The camera  reposition itself to view the center point of the actors,but actually it just undo the "move",the actor didn't rotate, anyone can help me reset the carmera to the original place?
thx~~~
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