[vtkusers] Q: nVidia graphics card problem. Help!

[David Gobbi]

Hi Audrius,

Make sure that you don't try to share the same vtkTexture
(or the same vtkImageActor) between two vtkRenderWindows.
That is a big no-no, and is likely to either screw up the
rendering or to force the texture to re-load on every render
(my guess is that your textures are being re-loaded each
time, and this is slowing you down).

Make a new texture for each window.

 - David

On Thu, 5 Jul 2001, Audrius Stundzia wrote:

> Hi vtker's,
>
> Currently my !@#$%^&* "gigatexel" graphics card is anything but :(
>
> My system:
>
> OS: NT 4.0 with SP 6a
> Graphics: OPENGL
>
> CPU: 1 GHz PIII
> Mem: 1024 KB
> Graphics card: Creative Annihilator 2 with the nVidia GeForce 2 GTS chip and
> 32 MB DDR onboard memory
>
> All my 2D image slices are texture mapped, but when I open more than
> one window of such texture mapped images, the rendering slows down to a
> crawl. Contrary to various graphics sites "expert" recommendations,
> switching from the Creative drivers to the nVidia drivers only made the
> problem worse. This system should be able to handle these images with the
> greatest of ease.
>
> If anyone has had similar problems that they've solved I greatly appreciate
> hearing how they did it.
>
> In return, I'll run the sphere benchmark and contribute the results.
>
> Thanks again.
>
> Regards,
>
> Audrius
>
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