[vtkusers] VTK 5.6.0 vtkGPUVolumeRayCastMapper very slow?

[Julien Finet]

Hi,

Do you set "SetMaxMemoryInBytes" in the mapper ?

j.

On Wed, Dec 7, 2011 at 11:34 AM, leandro <leobbastos at gmail.com> wrote:

> I bring this topic back to life because i had similar problem wich didnt
> get
> 100% solved with this suggestion.
> The good thing is that I got my 512 x 512 x 194 (short) volume rendered in
> a
> good quality and performance.
>
> But I still have problems with other, larger datasets:
> the first: 512 x 512 x 1359 (short) volume. It is so slow that you cannot
> even call it "interaction".
> the second: 512 x 512 x 1775 (short) doesn't even render (crashes).
>
> My system is similar to Elvis Chen's:
> VTK, rebuilt usign DirectX SDK from June 2010 as proposed here.
> Win 7 64-Bit
> Xeon 2,7GHz 4 core
> 4GB RAM
> 2 x NVIDIA Quadro FX 3700 with 512MB video RAM
>
> I've been wondering, if VTK doesn't take use of both GPUs together and the
> 512MB video RAM of one is the bottleneck.
> I wrote a pure-VTK small test-program to render a volume. It means
> dicomReader -> mapper -> volume -> renderWindow.
>
> I observed the behavior of VolView 3.4 while rendering and interacting.
> Even
> with option "Use GPU rendering" unchecked I see alot of GPU activity (>90%)
> while interacting (watched using "Process Explorer"). This doens't happen
> when I load the same volume with my application (2-3%). What does VolView
> do
> different?
>
> I would appreciate any idea on how to explain this behavior. Thank you =)
>
> --
> View this message in context:
> http://vtk.1045678.n5.nabble.com/VTK-5-6-0-vtkGPUVolumeRayCastMapper-very-slow-tp1249233p5056223.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
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