[vtkusers] QVTK Widget odd behavior on Ubuntu 16.10 and NVidia GPU:

[Shawn Waldon]

To clarify on Utkarsh's answer, "OpenGL2" is just the name of the backend
(as the second OpenGL backend to VTK).  The required version of OpenGL to
use the "OpenGL2" backend is OpenGL 3.2.

HTH,
Shawn

On Wed, Jul 19, 2017 at 11:30 AM, BBerco <bebe0705 at colorado.edu> wrote:

> Utkarsh,
> thanks for the suggestion.
>
> I'm trying to have this working on my Mac first.
>
> I have replaced the QVTKWidget by a QVTKOpenGLWidget, and set its render
> window to a vtkGenericOpenGLRenderWindow.
>
> *
> vtkSmartPointer< vtkGenericOpenGLRenderWindow> render_window =
> vtkSmartPointer< vtkGenericOpenGLRenderWindow>::New();
> this -> qvtkWidget -> SetRenderWindow(render_window);
> this -> qvtkWidget -> GetRenderWindow() -> AddRenderer(this -> renderer);
> *
>
> Unfortunately it segfaults after returning the following error message:
> *
> Warning: In
> /Users/bbercovici/VTK/VTK_source/Rendering/OpenGL2/
> vtkOpenGLRenderWindow.cxx,
> line 835
> vtkGenericOpenGLRenderWindow (0x7f97260f8e00): VTK is designed to work with
> OpenGL version 3.2 but it appears it has been given a context that does not
> support 3.2. VTK will run in a compatibility mode designed to work with
> earlier versions of OpenGL but some features may not work.
>
> ERROR: In
> /Users/bbercovici/VTK/VTK_source/Rendering/OpenGL2/
> vtkOpenGLPolyDataMapper2D.cxx,
> line 902
> vtkOpenGLPolyDataMapper2D (0x7f9727e15960): failed after RenderOverlay 1
> OpenGL errors detected
>   0 : (1280) Invalid enum
> *
>
>
> I recompiled VTK beforehand with the -DVTK_RENDERING_BACKEND:
> STRING=OpenGL2
> flag. Is OpenGL3 a thing?
>
>
>
>
>
>
>
>
>
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>
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> GPU-tp5744016p5744018.html
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