[vtkusers] actorCollection empty after an AddActor...why?

[Giancarlo Amati]

Good morning everybody,

I hope this time my question find an answer: I have this statemets:

_ren->AddActor(ImgACT1);
_ren->AddActor(ImgACT2); wwhere ImgActX are both vtkImageActor objects.
_ren->Render();

right after these statemets I need to collect the list of these actor from the renderer.
So I call the GetActors() to retrieve the ActorCollection that is unfortunately EMPTY.
Why?

Kind regards.
Giancarlo

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