[vtkusers] [VtkEdge] VTKEdge volume mapper cannot work with multiple render window?

[Wes Turner]

On Thu, Nov 6, 2008 at 10:21 AM, AGPX <agpxnet at yahoo.it> wrote:

> >> You are posting to the wrong mailing list. VTKEdge has its own one:
>
> Oh, sorry for this. I'll post VTK related questions to that mailing list
> from now.
>
> >> I think if it worked with vtkOpenGLVolumeTextureMapper3D it was by
> >> chance. You cannot reuse the same mapper in two different render
> >> window. At the OpenGL level a
> >> render window is attached to one OpenGL context and each mapper caches
> >> some OpenGL resources specific to this OpenGL context.
>
> This is a severe limitation, because if you want to render 2 (or more)
> views of the volumetric data, you need to allocate it two (or more) times
> and this is quite prohibitive in most scenario.
>
> Anyway, thanks for the reply,
>
> - AGPX
>

Why is this prohibitive?  My understanding is that multiple mappers can
share the same input, so this does not require that all the pipeline be
replicated, just the actor and mapper code ... These are relatively compact.

- Wes


>
>
> ------------------------------
> *Da:* Francois Bertel <francois.bertel at kitware.com>
> *A:* vtkusers at vtk.org
> *Cc:* vtkedge at vtkedge.org
> *Inviato:* Giovedì 6 novembre 2008, 16:16:56
> *Oggetto:* Re: [VtkEdge] [vtkusers] VTKEdge volume mapper cannot work with
> multiple render window?
>
> You are posting to the wrong mailing list. VTKEdge has its own one:
> http://www.vtkedge.org/vtkedge/help/mailing.html
>
> I think if it worked with vtkOpenGLVolumeTextureMapper3D it was by
> chance. You cannot reuse the same mapper in two different render
> window. At the OpenGL level a
> render window is attached to one OpenGL context and each mapper caches
> some OpenGL resources specific to this OpenGL context.
>
>
> On Thu, Nov 6, 2008 at 5:30 AM, AGPX <agpxnet at yahoo.it> wrote:
> > Hi,
> >
> > I have tried the vtkKWEVolumeMapper to perform volume rendering and it
> works
> > right with only one view (a single render window). But If I try to use
> the
> > same instance of vtkKWEVolumeMapper with two separate Renderer (with two
> new
> > RenderWindow), the application crash. I haven't this problem with
> > vtkOpenGLVolumeTextureMapper3D. Someone can confirm that
> vtkKWEVolumeMapper
> > have this limitation? Any workaround?
> >
> > Thanks in advance,
> >
> > - AGPX
> >
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>
>
>
> --
> François Bertel, PhD  | Kitware Inc. Suite 204
> 1 (518) 371 3971 x113 | 28 Corporate Drive
>                       | Clifton Park NY 12065, USA
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> ------------------------------
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-- 
Wesley D. Turner, Ph.D.
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x120
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