[vtkusers] How to update after starting vtkRenderWindowInteractor?

[Irene Tedjo]

Hi,

i'm trying to enable user interaction in an animation program. 

vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
   iren->SetRenderWindow(renWin);
...
while(!exit){ 
     ... 
   updateMyVis();       // call a function to update the visualization
   renWin->Render();      
   //iren->Start();
}

My problem: The loop stops at the line where I call "iren->Start();"
I have to end the renderWindowInteractor to continue the loop. 
Does anybody have any idea, how to start an interactor without blocking my
loop? 

Thanks,
Irene

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