[vtkusers] volume rendering using CPU instead of GPU

[Mark Roden]

According to the tool found here:
http://www.realtech-vr.com/glview/download.html
my system fully supports opengl up to and including 4.0, and 75% of
4.1.  No extensions are missing.

Could something else cause that error to arise-- ie, it's a symptom,
but not the cause?

Thanks,
Mark

On Wed, Jan 5, 2011 at 12:46 PM, Mark Roden <mmroden at gmail.com> wrote:
> To follow up on my own question, I've found
> vtkOpenGLGPUVolumeRayCastMapper
>
> However!  I'm getting the following error log:
>
> ERROR: In ..\..\vtk-5.6.1\VolumeRendering\vtkOpenGLGPUVolumeRayCastMapper.cxx,
> line 4173
> vtkOpenGLGPUVolumeRayCastMapper (00000000085BEF20): Rendering failed
> because the following OpenGL extensions are required but not
> supported:
>
>
> ERROR: In ..\..\vtk-5.6.1\VolumeRendering\vtkOpenGLGPUVolumeRayCastMapper.cxx,
> line 4173
> vtkOpenGLGPUVolumeRayCastMapper (00000000085BEF20): Rendering failed
> because the following OpenGL extensions are required but not
> supported:
>
>
> ERROR: In ..\..\vtk-5.6.1\VolumeRendering\vtkOpenGLGPUVolumeRayCastMapper.cxx,
> line 4173
> vtkOpenGLGPUVolumeRayCastMapper (00000000085BEF20): Rendering failed
> because the following OpenGL extensions are required but not
> supported:
>
>
> Since no particular extension is reported, I'm unsure of how to
> proceed.  The same error happens if I use vtkGPUVolumeRayCastMapper as
> well, suggesting that vtkGPUVolumeRayCastMapper just thunks down to
> vtkOpenGLGPUVolumeRayCastMapper (at least in this instance).
>
> I've updated my graphics drivers to be the latest greatest from
> ATI/AMD, for the 57xx series of cards.
>
> The result is an empty volume.
>
> Any thoughts on how to fix?
>
> Thanks,
> Mark
>
> On Wed, Jan 5, 2011 at 9:15 AM, Mark Roden <mmroden at gmail.com> wrote:
>> Hi all,
>>
>> The code that I've previously posted (and can repost here if
>> necessary) is using my cpu cores instead of my wiz-bang graphics card.
>>  How can I get the rendering to happen on the gpu?
>>
>> I'm using Java on vtk 5.6.1.
>>
>> Thanks!
>> Mark
>>
>