<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div><br></div><div>And I'm currently using version 7.1! </div><div><br data-mce-bogus="1"></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>De: </b>"Romain CENDRE" <romain.cendre@optopartner.com><br><b>À: </b>"Ken Martin" <ken.martin@kitware.com><br><b>Envoyé: </b>Lundi 19 Décembre 2016 14:28:25<br><b>Objet: </b>Re: [vtk-developers] Error on glGenQueries<br></div><br><div data-marker="__QUOTED_TEXT__"><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Hi Ken!<br><br></div><div>This is my resetView() function:</div><br><div>void QVTKDisplay::resetView()<br>{ <br> double * bounds = m_actor->GetBounds();<br><br> double imageCenterX = 0.5f * (bounds[1] - bounds[0]);<br> double imageCenterY = 0.5f * (bounds[3] - bounds[2]);<br> double imageWidth = bounds[1] - bounds[0];<br> double imageHeight = bounds[3] - bounds[2];<br><br> m_renderer->ResetCamera();<br> m_renderer->GetActiveCamera()->ParallelProjectionOn();<br> m_renderer->GetActiveCamera()->SetFocalPoint(imageCenterX, imageCenterY, 0.f);<br> m_renderer->GetActiveCamera()->SetPosition( imageCenterX, imageCenterY, m_renderer->GetActiveCamera()->GetDistance());<br> m_renderer->GetActiveCamera()->SetViewUp(0, 1, 0);<br> //m_renderer->Render();<br>}</div><br><div>I try to keep always the same instance of object, idem for window.<br>Does it answer to your question?</div><br><hr id="zwchr"><div><b>De: </b>"Ken Martin" <ken.martin@kitware.com><br><b>À: </b>"Romain CENDRE" <romain.cendre@optopartner.com><br><b>Cc: </b>"vtk-developers" <vtk-developers@vtk.org><br><b>Envoyé: </b>Lundi 19 Décembre 2016 14:23:49<br><b>Objet: </b>Re: [vtk-developers] Error on glGenQueries<br></div><br><div><div dir="ltr">What version of VTK are you using? How do you change your camera? Using the same window or creating a new one?<br><div>Ken</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Dec 19, 2016 at 4:01 AM, Romain CENDRE <span dir="ltr"><<a href="mailto:romain.cendre@optopartner.com" target="_blank">romain.cendre@optopartner.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:#000000"><div>Hi everyone,</div><div>I'm new and I'm starting to work on VTK.</div><br><div>//// CONTEXT</div><br><div>We use VTK with OpenGL2 (don't ask me why, it's not mandatory, it was choosen by a previous developper).<br><br>I've made a Pipeline made like this:</div><br><div>2D data image => vtkImageMagnitude => vtkImageDataGeometryFilter => vtkWarpScalar => vtkMergeFilter (geometry) => Actor</div><div> =========================================> <span style="color:#000000;font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">vtkMergeFilter (Scalars)</span></div><div><span style="color:#000000;font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none"><br></span></div><div><span style="color:#000000;font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">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.</span></div><div><span style="color:#000000;font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none"><br></span></div><div>My image actor is included in a Renderer, with an cubeAxesActor, a ScalarBar and a LegendScaleActor.</div><br><div>All pipeline objects are started one time at the start.</div><br><br><div>//// PROBLEM</div><br><div>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:</div><br><div>vtkOpenGLRenderer (0537D740): failed after Clear 16 OpenGL errors detected<br> 0 : (1282) Invalid operation<br> 1 : (1282) Invalid operation<br> 2 : (1282) Invalid operation<br> 3 : (1282) Invalid operation<br> 4 : (1282) Invalid operation<br> 5 : (1282) Invalid operation<br> 6 : (1282) Invalid operation<br> 7 : (1282) Invalid operation<br> 8 : (1282) Invalid operation<br> 9 : (1282) Invalid operation<br> 10 : (1282) Invalid operation<br> 11 : (1282) Invalid operation<br> 12 : (1282) Invalid operation<br> 13 : (1282) Invalid operation<br> 14 : (1282) Invalid operation<br> 15 : (1282) Invalid operation<br><br><br>ERROR: In ..\..\..\sources\Rendering\OpenGL2\vtkOpenGLCamera.cxx, line 144<br>vtkOpenGLCamera (053D4D20): failed after Render 16 OpenGL errors detected<br> 0 : (1282) Invalid operation<br> 1 : (1282) Invalid operation<br> 2 : (1282) Invalid operation<br> 3 : (1282) Invalid operation<br> 4 : (1282) Invalid operation<br> 5 : (1282) Invalid operation<br> 6 : (1282) Invalid operation<br> 7 : (1282) Invalid operation<br> 8 : (1282) Invalid operation<br> 9 : (1282) Invalid operation<br> 10 : (1282) Invalid operation<br> 11 : (1282) Invalid operation<br> 12 : (1282) Invalid operation<br> 13 : (1282) Invalid operation<br> 14 : (1282) Invalid operation<br> 15 : (1282) Invalid operation<br><br><br>ERROR: In ..\..\..\sources\Rendering\OpenGL2\vtkOpenGLRenderer.cxx, line 125<br>vtkOpenGLRenderer (0537D740): failed after UpdateLights 16 OpenGL errors detected<br> 0 : (1282) Invalid operation<br> 1 : (1282) Invalid operation<br> 2 : (1282) Invalid operation<br> 3 : (1282) Invalid operation<br> 4 : (1282) Invalid operation<br> 5 : (1282) Invalid operation<br> 6 : (1282) Invalid operation<br> 7 : (1282) Invalid operation<br> 8 : (1282) Invalid operation<br> 9 : (1282) Invalid operation<br> 10 : (1282) Invalid operation<br> 11 : (1282) Invalid operation<br> 12 : (1282) Invalid operation<br> 13 : (1282) Invalid operation<br> 14 : (1282) Invalid operation<br> 15 : (1282) Invalid operation<br><br><br>ERROR: In ..\..\..\sources\Rendering\OpenGL2\vtkOpenGLProperty.cxx, line 91<br>vtkOpenGLProperty (05A061E8): failed after Render 16 OpenGL errors detected<br> 0 : (1282) Invalid operation<br> 1 : (1282) Invalid operation<br> 2 : (1282) Invalid operation<br> 3 : (1282) Invalid operation<br> 4 : (1282) Invalid operation<br> 5 : (1282) Invalid operation<br> 6 : (1282) Invalid operation<br> 7 : (1282) Invalid operation<br> 8 : (1282) Invalid operation<br> 9 : (1282) Invalid operation<br> 10 : (1282) Invalid operation<br> 11 : (1282) Invalid operation<br> 12 : (1282) Invalid operation<br> 13 : (1282) Invalid operation<br> 14 : (1282) Invalid operation<br> 15 : (1282) Invalid operation<br></div><br><br><div>The error happens at this line :</div><br><div style="padding-left:30px"> if (this->TimerQuery == 0)<br> {<br> glGenQueries(1, static_cast<GLuint*>(&this->TimerQuery));<br> }</div><div style="padding-left:30px"><br></div><div>If you want my code, you can ask me.</div><br><div>I think it's just a newbie problem, but I don't find anything on it.</div><br><div>Best regards</div><span class="HOEnZb"><span style="color: #888888;"><div>Romain</div></span></span></div></div><br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature">Ken Martin PhD<div>Chairman & CFO<br>Kitware Inc.<br>28 Corporate Drive<br>Clifton Park NY 12065<br>518 371 3971<br><div><span style="font-size:10pt;font-family:Tahoma,sans-serif">This communication,
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