Hi, On Sunday 29 September 2013 16:12:48 Thomas Meyer wrote: > thank you very much!
You're welcome. > (I have read your 5 parts article: > http://www.kdab.com/opengl-in-qt-5-1-part-1/ > and tried the terrain_tessellation project > http://www.kdab.com/~sean/terrain_tessellation.zip [awesome]) > > I want to use the QGLWidget, because I get 'artefacts' if > I use QPainter's drawText in QWindow and it is possible to > add QGLWidget as central widget in QMainWindow. > With the QWindow I can only render something (I think) and > found no solution to add it to something or to use buttons, sliders etc. > > Before I got your answer, I found a solution: > http://qt-project.org/wiki/How_to_use_OpenGL_Core_Profile_with_Qt > https://svn.theharmers.co.uk/svn/codes/public/opengl/trunk/07-core-profile/ > and > http://qt-project.org/forums/viewthread/16041/#90717 > > So, if I want to use the 'glTextureView' (Core since version 4.3, > http://www.opengl.org/wiki/GLAPI/glTextureView) in GLWidget: > ... > voidGLWidget::initializeGL(void) > > { > > ... > typedefvoid(APIENTRY*_glTextureView)(GLuint,GLenum,GLuint,GLenum,GLuint,GLui > nt,GLuint,GLuint); > > > _glTextureViewglTextureView; > > glTextureView=(_glTextureView)context()->getProcAddress("glTextureView"); > > if(glTextureView!=NULL) > { > qDebug()<<Q_FUNC_INFO<<"glTextureView!=NULL"; > } > ... > I have not used the function, but this code works for me. In all seriousness, unless you actually enjoy resolving function pointers I would just use QOpenGLFunctions_4_3_Core. It will make your life much easier. As an aside if you are interested in OpenGL texturing, please do try out QOpenGLTexture which is new for the upcoming Qt 5.2: http://doc-snapshot.qt-project.org/qt5-stable/qopengltexture.html > If I use your solution in the 'voidGLWidget::initializeGL(void)' > function from the > https://svn.theharmers.co.uk/svn/codes/public/opengl/trunk/07-core-profile/ > example and add it as central widget in a QMainWindow, it will not work > at 'm_context->create();'. I've not tested any of that old code with Qt5. Instead prefer QGLWidget + QOpenGLFunctions_4_3_Core which should work perfectly fine. > So, the idea is, to have a render surface in the center of a main window and > have dock widgets around to manipulate the render surface. I don't want to > render buttons, check boxes and sliders (etc.). I want to use what the Qt > library has. > (Ok, later perhaps in a game development, it looks like better ... :-) ) > > It would be nice (a wish) to have more documentation and examples about > OGL with Qt. > More clarity about additional libraries, which are not necessary anymore > (i.e. glew). I agree. Patches welcome. I'm very busy at present improving support for textures and other areas which we will need for a new Qt3D. > Btw. there is no description for 'QGLContext::getProcAddress' in the > documentation. > > I don't understand: > ... > QGLFormatglFormat; > glFormat.setVersion(1, 0); > ... > The documentation is not enough for me. I can set the version 1.0, but > the functions > above 1.0 works. Check which OpenGL context version was actually created. I suspect you actually obtain a 1.5 context or maybe even 2.1 of which 1.0 is a subset. Cheers, Sean -- Join us in October at Qt Developer Days 2013 - https://devdays.kdab.com Dr Sean Harmer | sean.har...@kdab.com | Managing Director UK Klarälvdalens Datakonsult AB, a KDAB Group company Tel. Sweden (HQ) +46-563-540090, USA +1-866-777-KDAB(5322) KDAB - Qt Experts - Platform-independent software solutions _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
