<div dir="ltr"><div><div>I had a similar issue with QVTKWidget some time ago, which was due to OpenGL<br></div>I solved the issue by checking for the available extensions when creating the QVTKWidget:<br><br><span style="font-family:monospace,monospace">QVTKWidget* createQVTKWidget(QWidget *parent) <br>{<br></span></div><span style="font-family:monospace,monospace"> // create a RenderWindow and loads the compatibility profile on it<br></span><div><span style="font-family:monospace,monospace"> auto extManager= vtkSmartPointer<vtkOpenGLExtensionManager>::New();<br> auto renWin = vtkOpenGLRenderWindow::New();<br> extManager->SetRenderWindow(renWin);<br> if(extManager->ExtensionSupported("GL_ARB_compatibility" ) != 0)<br> extManager->LoadExtension("GL_ARB_compatibility");<br> else<br> ep::log << "Warning: GL_ARB_compatibility extension cannot be loaded" << endl;<br> <br> // Create and add a renderer to the managed render window<br> auto ren = vtkOpenGLRenderer::New();<br> ren->SetBackground(1, 1, 1);<br> renWin->AddRenderer(ren);<br><br></span></div><div><span style="font-family:monospace,monospace"> /// Create the QVTKWidget and adds the managed render window to it<br></span></div><div><span style="font-family:monospace,monospace"> auto outWidget = new QVTKWidget(parent);<br> outWidget->SetRenderWindow(renWin);<br> <br> assert(renWin->GetInteractor());<br> renWin->Delete();<br> ren->Delete();<br> return outWidget;<br>}</span><br><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Feb 17, 2015 at 2:57 PM, Aashish Chaudhary <span dir="ltr"><<a href="mailto:aashish.chaudhary@kitware.com" target="_blank">aashish.chaudhary@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">If you are using older version of volume mapper (OpenGL backend) then it is possible that when using QT window, it's not finding the extensions its needed. Is it possible for you to try the OpenGL2 backend? <div><br></div><div>Also, Do you see any error message on the console? </div><div><br></div><div>Thanks,</div><div><br></div></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Mon, Feb 16, 2015 at 4:59 PM, Ernesto <span dir="ltr"><<a href="mailto:elguevara@uci.cu" target="_blank">elguevara@uci.cu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>Jakub Łągwa <kubalagwa <at> <a href="http://gmail.com" target="_blank">gmail.com</a>> writes:<br>
<br>
><br>
> Hello,<br>
> I have a strange problem with showing VTK volume in QVTKWidget. I can<br>
compile example such as as:<br>
> <a href="http://vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/Medical/Cxx/Medical4.cxxand" target="_blank">http://vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/Medical/Cxx/Medical4.cxxand</a><br>
<br>
<br>
> it work fine. But when I want to use exactly the same code in my sample<br>
> Qt application (let's say - render only after user press a button)<br>
> nothing is shown in QVTKWidget (I tried also with QVTKInteractor instead<br>
> of the one from example). I have this problem only when I want to use<br>
> vtkVolume and than add the volume to renderer with AddVolume. If I make<br>
> other 3D visualisation for example with vtkContourFilter and than I add<br>
> it to renderer with AddActor method - everything works fine.<br>
> I was trying to solve this problem for a couple of days but I found<br>
> some things that I can't understand in any way. If I take, for example,<br>
> Medical4.cxx file and add there<br>
> #include <QApplication> <br>
> and than<br>
<br>
<br>
</span>Hello Jakub I have the same problem with QVTKWidget and can't find a<br>
solution I've been stopped for 4 days. I need to know whether you managed to<br>
solve this problem and how did you solved it.<br>
<br>
Thanks in advance.<br>
Ernesto<br>
<br>
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</blockquote></div><br><br clear="all"><div><br></div></div></div><span class="HOEnZb"><font color="#888888">-- <br><div><div dir="ltr"><font face="trebuchet ms, sans-serif"><i>| Aashish Chaudhary <br>| Technical Leader <br>| Kitware Inc. <br></i></font><div><i><font face="trebuchet ms, sans-serif">| </font><a href="http://www.kitware.com/company/team/chaudhary.html" target="_blank">http://www.kitware.com/company/team/chaudhary.html</a></i></div></div></div>
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