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Creating qt based FBOs for 3D objects.

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  • S Offline
    S Offline
    ShakingBear
    wrote on last edited by
    #1

    Hi,

    Any guides on how to create an FBO for 3D objects in Qt?? I intend to create small cuboids in them and place them at different positions in a OpenGL canvas.

    Thanks

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

      Hi,

      Do you mean QOpenglFramebufferObject ?

      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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      • S Offline
        S Offline
        ShakingBear
        wrote on last edited by
        #3

        Yea. I have used the class for creating 2D textures previously, but I can't seem to make a 3D object using it. Any advice there?

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

          Do you mean like in the Cube OpenGL ES 2.0 example ?

          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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          • SGaistS SGaist

            Do you mean like in the Cube OpenGL ES 2.0 example ?

            S Offline
            S Offline
            ShakingBear
            wrote on last edited by
            #5

            @SGaist No. The example uses VBOs and not FBOs for the 3D object. I've tried using it before; while I succeeded, but my problem wasn't solved.
            The problem in this case being that I wish to edit/remove/add a 3D object without affecting the other objects.
            The code currently removes all 3D objects and redraws / renders them onto the display after every edit. To hopefully skip that I wanted to create each object in a separate FBO and "Blit" the FBO onto the main canvas removing a small blink which happens for all objects.

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