Dear Edge Team;

I'm trying to build a simple volume rendering application on top of Cocoa in
order to evaluate the GPU Ray Casting support, but when I run the
application I've got the following error:

---

ERROR: In
/Users/fauze/Development/toolkits/vtkedge/source/VolumeRendering/vtkKWEOpenGLGPUVolumeRayCastMapper.cxx,
line 4139
vtkKWEOpenGLGPUVolumeRayCastMapper (0x768d600): Rendering failed because the
following OpenGL extensions are required but not supported:

Program received signal:  “EXC_BAD_ACCESS”.

---

I'm sure the program is ok since it works with the ordinary mappers of VTK
and also if I let VTKEdge to load itself the mapper (vtkKWEVolumeMapper).
The error occurs when I opt by vtkKWEGPUVolumeRayCastMapper which leads to
the deployment of the vtkKWEOpenGLGPUVolumeRayCastMapper. The point is that
the "following OpenGL extensions" are not listed and thus I can't figure out
what is happening.

Please, can someone give me so help? Some framework I'm missing? I'm running
on top of Mac Pro Core i7 - NVidia GTX 285 - Snow Leopard / Leopard.

Thanks in advance

Fauze


Ps.: The VTKEdgeVolumeRenderingCxxTests have printed out: Required
extensions not supported.
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