[vtkusers] vtkVolumeTextureMapper3D and offscreen rendering

[Mark Wyszomierski]

I believe I ran into the a similar problem before, I wanted to
save what was currently being rendered to screen to an
image file using vtkWindowToimageFilter. This did not work
with the 3d texture volume mapper, but it did for the rest of the
volume renderers. I had to write some code to extract the pixel data
left in the screen buffer, and this worked ok. Sorry I can't be
more specific, this was about 2 months ago, but I posted a
better explanation of what I did to the mailing list at that point,
it should still be in the archives. Hopefully this can give you
some ideas if the general problems are the same,
 Mark

 On 10/18/05, Lisa Avila <lisa.avila at kitware.com> wrote:
>
>
> Hi Jesse,
>
> The offscreen context probably does not support the extension necessary to
> do the 3D texture mapping (this is typical). I am not sure if there is a
> way around it - hopefully drivers will support it in the future.
>
> Lisa
>
>
>
> At 04:29 PM 10/11/2005, Jesse Corrington wrote:
> >I just switched to using 3d texture mapping for volumes, and now i am
> >unable to do offscreen rendering, but the onscreen works very well. Is it
> >possible to have offscreen rendering using 3d texture mapping.
> >
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