[vtkusers] vtk 6.3.0 | OpenGL2: OpenGL errors?

[Ken Martin]

With the new rendering backend in VTK we are using a more recent version of
OpenGL (version 3.2 typically).  There are still some spots where old calls
are made that no longer work with newer versions of OpenGL. As we find them
we fix them so they should be fairly rare with the current VTK tree now.
Typically they just produce an error and get ignored by OpenGL and
everything works.



Thanks

Ken



Ken Martin PhD

Chairman & CFO

Kitware Inc.

28 Corporate Drive

Clifton Park NY 12065

ken.martin at kitware.com

919 869-8871 (w)





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*From:* vtkusers [mailto:vtkusers-bounces at vtk.org] *On Behalf Of *Audrius
Stundzia
*Sent:* Monday, September 21, 2015 1:10 PM
*To:* VTK Users
*Subject:* [vtkusers] vtk 6.3.0 | OpenGL2: OpenGL errors?



Hello,



OS: Windows 10 x64

IDE: MS VS2015 x64

CMake:

VTK_RENDERING_BACKEND OpenGL2

VTK_REPORT_OPENGL_ERRORS [Checkmark - On]

VTK: 6.3.0 x64 Debug build



In stdafx.h, have



#include <vtkOpenGLError.h>



Encountering the following runtime error message:



Error in ...\OpenGL2\vtkOpenGLRenderer.cxx, line 351

vtkOpenGLRenderer [...]: failed after Clear 16 OpenGL errors detected

0:[1282] Invalid Operation

...

15:[1282] Invalid Operation



in previously working code, in vtk 5.10.1, that texture maps an image onto
a plane.

The image is displayed as before, however, it is accompanied by the above
error message.



A Google search suggests that this may be a GLSL version issue:



https://stackoverflow.com/questions/31323870/opengl-error-1282-invalid-operation-when-using-texture



Also, attempting to add the vtk line of code



vtkOpenGLClearErrorMacro();



generates the following error message:



error LNK2019: unresolved external symbol __imp_glGetError referenced in
function "void __cdecl vtkClearOpenGLErrors(unsigned int)"
(?vtkClearOpenGLErrors@@YAXI at Z)



Please advise.
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