[vtkusers] rendering volumetric scan(s)

[Cartik Sharma]

Hi:

I have a question regarding volume rendering with gpu based volume ray casting. 

I'm implementing volume rendering with the vtkGPUVolumeRayCastMapper which  
gives reliable results for gpu based volume ray cast mappers. However, I'm running
into problems with one of the volumes wherein the rendering gives an assertion
failure:

Assertion '"check: positive_low_bounds" && lowBounds[2]>= 0.0"'

The volume extents for the same seems to be just a point, i.e. 0 298.35, 0 298.835,
and 0, 0 which is just a point, yet seems to open up in Volview.

I looked at the original images and it seems like it's a volumetric scan, (spacing between
slices is 0). Please let me know if you have run into this with volumetric images
for gpu rendering.

BTW. Thanks to Francois Bertel for replying to my previous post regarding the GLX render
window error vtk 5.6 which seemed to be something to do with the right rendering
context.

Best regards,

Cartik


      
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