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

[Audrius Stundzia]

Hi David,

Thanks for your prompt reply and suggestion.

We are in no instance ever sharing vtkTexture
objects between render windows. Each viewer has its own render window
and the 2D viewers each have their own set of texture objects and actors, 
one per slice. They are never re-used and never shared.
Which is why I'm very puzzled.

Best regards,

Audrius

>From: David Gobbi <dgobbi at irus.rri.ca>
>To: <audrius at adv-biologic.com>
>CC: <vtkusers at public.kitware.com>
>Subject: Re: [vtkusers] Q: nVidia graphics card problem. Help!
>Date: Thu, 5 Jul 2001 17:08:04 -0400 (EDT)
>
>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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