[vtkusers] Deleting / Hiding all the objects in a window

[David Doria]

On Thu, Nov 19, 2009 at 9:36 AM, David E DeMarle
<dave.demarle at kitware.com> wrote:
> Because VTK is lazily evaluated. The pipeline doesn't flow
> automatically whenever anything changes. You have to call Render() or
> Update() for the pipeline to recognize that a change happened. This
> lets you aggregate changes, which is important for big data.
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-371-3971 x109

I was calling Render() on the Renderer - I changed to calling Render()
on the RenderWindow and it behaves as I would expect.

This is the kind of thing that seems very confusing...

Thanks,

David