[vtkusers] VTK and GPU Support

[Ulrich Kemloh]

Hello everyone,

I am having some trouble activating GPU support in my VTK Application.
I was wondering why my application was so slow although I am using
 an nvidia quadro 4000 with the latest driver installed.

The rendering is happening in a qvtkWidget and I am basically just
rendering 2000 spheres (using glyphs).

_renderingWindows->isDirect() returns false
and the tests  VTKRenderingOpenGLCxx_tests.exe  tells "There is 0 GPU (s)"

So I guess I am missing a very important point.

Does vtk needs a special flag while building the libraries?

I am using the 64bit version of Win7, VTK 6.1 and QT5.2.

I am very looking forward to any help

Thanks in advance and regards

Ulrich
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