[vtkusers] Why could vtkgl::GenBuffers == NULL ?

[Francois Bertel]

Are you using indirect rendering mode on Linux? If so, try VTK git, it
should be fixed (a workaround for a nVidia bug in indirect rendering
mode on Linux)

On Thu, May 27, 2010 at 6:51 AM, Oliver Kania
<kania.oliver at googlemail.com> wrote:
> In a previous post, I said that my App crashes with VTK 5.6 but not 5.2
> because GenBuffers == NULL during Interactor::Render.
> I found a post in the archive that says GenBuffers is NULL if the OpenGl
> Version is < 1.5 and
> a certain extension is not loaded.
> How do I query the OpenGL version which is used by VTK and how do I change
> it ?
> However, my driver supports GL > 2.0, and I guess VTK does load the best
> possible version.
> What other reason could there be for GenBuffers == NULL ?
> Is it possible to avoid usage of this function by VTK ?
>
> Best Regards, Oliver
>
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