Remove Actor2D

[Dr Tian-Qing Ye]

Dear All

I have added several Actor2Ds into my
Renderer(renderer->AddActor2D(act1)...).

Later I want to remove some of them, say the last two. How can I do
that?
I tried using the following codes to retrieve the 2D Actors, but it
didn't work.
... ...
    vtkActor2DCollection *actCol = vtkActor2DCollection::New();
        actCol = renderer->GetActors2D();
    int act_num = actCol->GetNumberOfItems();
    printf("act_num = %d\n", act_num);

 here I got output 0 !! Why?

Any helps are highly appreciated!

Regards

TQ Ye


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