[vtkusers] can't retreive actors in the actorCollection

[Giancarlo Amati]

God morning,

I have the following code:


    this->_ren->AddActor(imgAct1);
    this->_ren->AddActor(imgAct2);
    this->_ren->AddActor(imgAct3);

    _ren->Render();
    _ren->ResetCamera();

vtkActorCollection *actColl =  _ren->GetActor();

actColl->InitTraversal();


now the problem I have is although I've added the three actors to my renderer, when It follows a call to the actorCollection the collection list is empty.

Can someone tell me why?

Kind regards.
Giancarlo

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