[vtkusers] [VtkEdge] Volume rendering questions

[AGPX]

Hi,

surely the GPU rendering mode (vtkKWEGPUVolumeRayCastMapper mapper) of the VTKEdge have some problems. I have posted two issues on February (with video), but unfortunately they still are in 'new' status. I hope that these bugs will be removed before the final release will be released (look at: http://public.kitware.com/Bug/view.php?id=8549 and http://public.kitware.com/Bug/view.php?id=8548 for details). In addition to the one posted, I have discovered also a problem similar to your.... that is when I try to fly inside a volume, sometimes it disappears with no reason (I think that most problems are related to the clipping algorithm of the mapper). This is sad because the vtkKWEGPUVolumeRayCastMapper is the volume mapper of VTK/VTKEdge (in speed and quality).

I hope that someone can help...

- AGPX



________________________________
Da: Loris Vosilla <loris..vosilla at gmail.com>
A: vtkusers at vtk.org; vtkedge at vtkedge.org
Inviato: Ven 6 novembre 2009, 13:45:57
Oggetto: [VtkEdge] Volume rendering questions

Dear Vtk and vtkedge users,


I'm using vtkKWEVolumeMapper to volume render a three dimensional blood vessel.
If I use as rendering mode RayCastAndTexture I don't have any problem, but If I use 
the GPURenderMode I obtain strange resuts:

1) When I draw the volumetrical object with a vtkcamera outside of the object self 
   the rendering works fine, but as soon as the camera enters in the volume I can't see 
   anything.  The opacity function is properly set.  This problem doesn't come if I use 
   RayCastAndTexture  drawing method.  If needed I can post screenshots of what is 
   happening.

2) If I want to draw two volumetrical view in two different viewports only one is drawn
   using GPURenderMode. If I use RayCastAndTexture  drawing method both are drawn.

Thanks for your help
-Loris


      
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