[vtkusers] Rendering problem

[Lisa Avila]

Hello,

When you call Render() on a vtkRenderWindow, all props in all renderers are 
redrawn. If you want to move just a line (and it is an overlay line - not 
in 3D) then you can render the scene without the line, save the image and 
continually refresh the image and redraw just the line.

Lisa


At 05:09 AM 3/25/2004, S.Joung wrote:
>Hi,
>
>I added three actors to "vtkRenderer" and rendered "vtkRenderWindow".
>Two of them are volume data. Other one is just a line.
>I translate the position of line and re-rendererd a vtkRenderwindow.
>I think that it is speedy, but it takes long time.
>
>How can I render just one actor ?
>
>Thank you.
>
>------------------------------
>ex)
>
>vtkRenderer->addActor(actor1);
>vtkRenderer->addActor(actor2);
>vtkRenderer->addActor(actor3);
>
>vtkRenderWindow->Render();    ----> time1
>
>actor3->SetPosition(.........);
>
>vtkRenderWindow->Render();    ----> time2
>
>time1 == time2
>------------------------------
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