On Thu, Jun 11, 2015 at 4:43 PM, manish Choudhary <[email protected]> wrote: > Hi, > > I'm using Qt 5.4.2 for Windows 32-bit (VS 2013) and OpenSceneGraph-3.2.2 > stable release on Window 8.1 platform. > osgviewerQt example is not working without any modification. > It is aborts and in the command prompt it showing > "Warning: detected OpenGL error 'invalid operation' at Before > Renderer::compile > Error: In Texture::Extensions::setupGLExtensions(..) OpenGL version test > failed, requires valid graphics context. " > ... > > Why osgviewerQt example not working that seem strange to me.?
Those errors are Qt/OpenGL problems, not OSG issues. Did you install the Qt version using the Angle emulation, by chance? I believe that is the default download. Angle supports only OpenGL ES 2.x and translates that to Direct3D calls, so any code requiring "true" OpenGL will not work with that. The Angle backend is mainly there to accelerate the Qt scenegraph and is not really a full OpenGL implementation. Make sure to download the version of Qt with the native OpenGL support The versions with "OpenGL" in the name are the correct ones: http://www.qt.io/download-open-source/#section-2 If that is OK, then make sure you have the vendor OpenGL drivers for your graphic card installed (from AMD or Nvidia) - Windows used to ship with an ancient version of OpenGL, that will not work with OSG. Regards, J. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
