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Qt 5.0.1 and glext.h

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #2

    Hi and welcome to devnet,

    You might be missing the "glew":http://glew.sourceforge.net/ library

    EDIT:
    Forgot to ask, which version of Qt did you download ?

    As a side note it's Qt, QT stands for Apple's QuickTime :)

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • K Offline
      K Offline
      kmt11
      wrote on last edited by
      #3

      Hi,

      I stand corrected. Qt it is then.
      What did I download ? Qt 5.0.2 64bit for desktop (MSVC2012)

      Trying to port a 4.8 project on Unix built by my colleague, to my 5.0.2 on windows, and suspect the problem is that he has used legacy opengl.

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #4

        What could be the most simple is to try Qt 5.1.

        IIRC, there should have been some patches that remove the needs for glew

        Hope it helps

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • K Offline
          K Offline
          kmt11
          wrote on last edited by
          #5

          Thanks. Well, I'm just evaluating it with a view to a commercial multi-seat licence, so interested if it is a configuration issue or a simple workaround. Having used many other development packages over the years to develop a variety of apps, I am somewhat disappointed with our experience of Qt to date.

          I'm also trying 4.8 on a Mac, so don't get me started there !

          Nevertheless, I'll persevere, who knows, could be a simple fix.

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #6

            On my side, I've been developing with Qt since the version 3 days without major problems.

            Currently on Windows and OS X with the 4.8.X series and it's going quite well. So if you encounter some problem I might be able to help

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • K Offline
              K Offline
              kmt11
              wrote on last edited by
              #7

              Thank you for your offer. Seems to be up and running on Mac, after having downloaded multi-Gb to update the OS and update xcode.

              Qt Demo examples compile and run, but a ported project is failing to find GL/gl.h, GL/glext.h, etc.

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #8

                Do you have QT += opengl in your pro file ?

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                • K Offline
                  K Offline
                  kmt11
                  wrote on last edited by
                  #9

                  Yes, most certainly

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #10

                    Is it a simple project ? (Meaning one pro file for all)

                    If not check that every other project that uses these class also includes opengl

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                    • K Offline
                      K Offline
                      kmt11
                      wrote on last edited by
                      #11

                      It is one pro file only.

                      I now notice that, if I try #include <QtOpenGL>, I get "library not found for -IGLU", if that helps.

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #12

                        I think I found out the first problem (must be sleepy to have been so long...):

                        on mac you have to:

                        @#include <OpenGL/gl.h>@

                        That is: framework_name/filename.h

                        You can surround that with

                        @#ifdef Q_OS_MACX
                        #include <OpenGL/gl.h>
                        #else
                        #include <GL/gl.h>
                        #endif@

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                        • K Offline
                          K Offline
                          kmt11
                          wrote on last edited by
                          #13

                          Thank you. That seems to have fixed it.

                          Now builds with no errors.

                          The app runs perfectly. Brilliant. You've made my day.

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #14

                            You're welcome !

                            Don't forget to update your thread's title to solved so other forum users may know that a solution has been found :)

                            Interested in AI ? www.idiap.ch
                            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                            • K Offline
                              K Offline
                              kmt11
                              wrote on last edited by
                              #15

                              well, the original QT 5 on Windows and glext.h problem isn't solved....

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                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #16

                                IIRC, there's no glext.h by default on windows. But you can get the file "here":http://www.opengl.org/registry/

                                Interested in AI ? www.idiap.ch
                                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                • K Offline
                                  K Offline
                                  kmt11
                                  wrote on last edited by
                                  #17

                                  Got the file thanks. Throwing up an error, but that may be down to internal programming, so will look into that and report back.....

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                                  • K Offline
                                    K Offline
                                    kmt11
                                    wrote on last edited by
                                    #18

                                    Seems that trying to use glext.h throws up dozens of errors, and it's simply too much of a pain to sort this. I have to conclude that legacy opengl cannot be used with Qt 5.
                                    Tried reverting to Qt Creator 2.7.1 and Qt 4.8.4 on Windows, but this just refuses to configure a project, and ignores anything set up in the kit options.
                                    Qt 4.8 seems to be fine on Mac and a unix box, but Qt 5 has too many problems for us to think about using it as a future ipad app tool. If it has too many problems on Windows, it gives us no confidence that it will be safe for ios development.

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                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #19

                                      There must be a glitch in QtCreator's configuration.
                                      4.8.4 works pretty well on windows (even custom builds)

                                      Depending on your problem, you might consider contacting Digia to sort things out

                                      Interested in AI ? www.idiap.ch
                                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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