[vtkusers] about opengl extensions

[vicente carro]

Hi Francois,

We are evaluating to add that kind of extensions in VTK (cause they will
be quite usable in another project that we are working in). 
How much time could be required to add those extensions in VTK taking
into account that we are newbies in VTK?
We are focus in the compiledvertexarray-like and 3d textures.

Thanks

> Hi Vicente,
> 
> VTK uses OpenGL extensions for some programmable materials (VTK/Rendering/vtkGLSLShader*) and for some volume mappers (VolumeRendering/vtkOpenGLVolumeTextureMapper3D.* and VolumeRendering/vtkOpenGLHAVSVolumeMapper.*).
> VTK/Rendering/vtkOpenGLExtensionManager.* is designed to query the available extensions on the current OpenGL context and to load them. I don't think VTK uses vertex buffer objects yet.
> 
> Some documents are available here: http://www.vtk.org/Wiki/VTK_Shaders or browse the doxygen doc http://www.vtk.org/doc/nightly/html/
> 
> vicente carro wrote:
> > Hi:
> > I'm a newbie here and i have one question. Vtk uses extensions for
> > accelerated rendering (like vertexbufferobject, compiled vertex array
> > and so) ?
> 
>