[vtk-developers] Error on glGenQueries

Romain CENDRE romain.cendre at optopartner.com
Mon Dec 19 08:29:26 EST 2016 

And I'm currently using version 7.1! 


De: "Romain CENDRE" <romain.cendre at optopartner.com> 
À: "Ken Martin" <ken.martin at kitware.com> 
Envoyé: Lundi 19 Décembre 2016 14:28:25 
Objet: Re: [vtk-developers] Error on glGenQueries 

Hi Ken! 

This is my resetView() function: 

void QVTKDisplay::resetView() 
{ 
double * bounds = m_actor->GetBounds(); 

double imageCenterX = 0.5f * (bounds[1] - bounds[0]); 
double imageCenterY = 0.5f * (bounds[3] - bounds[2]); 
double imageWidth = bounds[1] - bounds[0]; 
double imageHeight = bounds[3] - bounds[2]; 

m_renderer->ResetCamera(); 
m_renderer->GetActiveCamera()->ParallelProjectionOn(); 
m_renderer->GetActiveCamera()->SetFocalPoint(imageCenterX, imageCenterY, 0.f); 
m_renderer->GetActiveCamera()->SetPosition( imageCenterX, imageCenterY, m_renderer->GetActiveCamera()->GetDistance()); 
m_renderer->GetActiveCamera()->SetViewUp(0, 1, 0); 
//m_renderer->Render(); 
} 

I try to keep always the same instance of object, idem for window. 
Does it answer to your question? 


De: "Ken Martin" <ken.martin at kitware.com> 
À: "Romain CENDRE" <romain.cendre at optopartner.com> 
Cc: "vtk-developers" <vtk-developers at vtk.org> 
Envoyé: Lundi 19 Décembre 2016 14:23:49 
Objet: Re: [vtk-developers] Error on glGenQueries 

What version of VTK are you using? How do you change your camera? Using the same window or creating a new one? 
Ken 

On Mon, Dec 19, 2016 at 4:01 AM, Romain CENDRE < romain.cendre at optopartner.com > wrote: 



Hi everyone, 
I'm new and I'm starting to work on VTK. 

//// CONTEXT 

We use VTK with OpenGL2 (don't ask me why, it's not mandatory, it was choosen by a previous developper). 

I've made a Pipeline made like this: 

2D data image => vtkImageMagnitude => vtkImageDataGeometryFilter => vtkWarpScalar => vtkMergeFilter (geometry) => Actor 
=========================================> vtkMergeFilter (Scalars) 

I keep a reference on vtkImageMagnitude to change image data stored inside, hope that all the pipe refresh itself and it seems to work at this time. 

My image actor is included in a Renderer, with an cubeAxesActor, a ScalarBar and a LegendScaleActor. 

All pipeline objects are started one time at the start. 


//// PROBLEM 

My problem is when I want to change my camera location (to get a 2D view) and call Render() on the renderer to refresh scene I get the following error: 

vtkOpenGLRenderer (0537D740): failed after Clear 16 OpenGL errors detected 
0 : (1282) Invalid operation 
1 : (1282) Invalid operation 
2 : (1282) Invalid operation 
3 : (1282) Invalid operation 
4 : (1282) Invalid operation 
5 : (1282) Invalid operation 
6 : (1282) Invalid operation 
7 : (1282) Invalid operation 
8 : (1282) Invalid operation 
9 : (1282) Invalid operation 
10 : (1282) Invalid operation 
11 : (1282) Invalid operation 
12 : (1282) Invalid operation 
13 : (1282) Invalid operation 
14 : (1282) Invalid operation 
15 : (1282) Invalid operation 


ERROR: In ..\..\..\sources\Rendering\OpenGL2\vtkOpenGLCamera.cxx, line 144 
vtkOpenGLCamera (053D4D20): failed after Render 16 OpenGL errors detected 
0 : (1282) Invalid operation 
1 : (1282) Invalid operation 
2 : (1282) Invalid operation 
3 : (1282) Invalid operation 
4 : (1282) Invalid operation 
5 : (1282) Invalid operation 
6 : (1282) Invalid operation 
7 : (1282) Invalid operation 
8 : (1282) Invalid operation 
9 : (1282) Invalid operation 
10 : (1282) Invalid operation 
11 : (1282) Invalid operation 
12 : (1282) Invalid operation 
13 : (1282) Invalid operation 
14 : (1282) Invalid operation 
15 : (1282) Invalid operation 


ERROR: In ..\..\..\sources\Rendering\OpenGL2\vtkOpenGLRenderer.cxx, line 125 
vtkOpenGLRenderer (0537D740): failed after UpdateLights 16 OpenGL errors detected 
0 : (1282) Invalid operation 
1 : (1282) Invalid operation 
2 : (1282) Invalid operation 
3 : (1282) Invalid operation 
4 : (1282) Invalid operation 
5 : (1282) Invalid operation 
6 : (1282) Invalid operation 
7 : (1282) Invalid operation 
8 : (1282) Invalid operation 
9 : (1282) Invalid operation 
10 : (1282) Invalid operation 
11 : (1282) Invalid operation 
12 : (1282) Invalid operation 
13 : (1282) Invalid operation 
14 : (1282) Invalid operation 
15 : (1282) Invalid operation 


ERROR: In ..\..\..\sources\Rendering\OpenGL2\vtkOpenGLProperty.cxx, line 91 
vtkOpenGLProperty (05A061E8): failed after Render 16 OpenGL errors detected 
0 : (1282) Invalid operation 
1 : (1282) Invalid operation 
2 : (1282) Invalid operation 
3 : (1282) Invalid operation 
4 : (1282) Invalid operation 
5 : (1282) Invalid operation 
6 : (1282) Invalid operation 
7 : (1282) Invalid operation 
8 : (1282) Invalid operation 
9 : (1282) Invalid operation 
10 : (1282) Invalid operation 
11 : (1282) Invalid operation 
12 : (1282) Invalid operation 
13 : (1282) Invalid operation 
14 : (1282) Invalid operation 
15 : (1282) Invalid operation 


The error happens at this line : 

if (this->TimerQuery == 0) 
{ 
glGenQueries(1, static_cast<GLuint*>(&this->TimerQuery)); 
} 

If you want my code, you can ask me. 

I think it's just a newbie problem, but I don't find anything on it. 

Best regards 
Romain 

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Ken Martin PhD 
Chairman & CFO 
Kitware Inc. 
28 Corporate Drive 
Clifton Park NY 12065 
518 371 3971 
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