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  4. Is there any way to rotate coordinate system respect y.
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Is there any way to rotate coordinate system respect y.

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  • T Offline
    T Offline
    turkoz14
    wrote on last edited by
    #1

    Hi, im new using qt and i kno that i can rotate the coordinate system with gracphicview->rorate() but this rotate respect x only so the x axis will always be on the top.
    i can explain better what i need attaching this images:
    0_1519504135612_coordsystem.jpg
    this is the default system, but if i rotate it wiht the function rotate it rotates clockwise online and what i need is this :
    0_1519504193125_coordsystem2.jpg

    No rotating 270° cause that makes that the x axis is on the top and y above.
    Thanks in advice.

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

      Hi,

      QTransform is likely what you want to use in order to do that.

      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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      • T Offline
        T Offline
        turkoz14
        wrote on last edited by
        #3

        Hi, thanks for the quick response.
        Im checking and doint this:
        this->ui->graphicsView->transform().rotate(180,(Qt::Axis(Qt::YAxis)));
        but there is no change on the visualization.

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

          What about applying it on the item directly ?

          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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          • T Offline
            T Offline
            turkoz14
            wrote on last edited by
            #5

            No, the same nothing happend and also the thing is to do it to the whole scene cause i add to many items to do it individually.

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

              I just realized: you’re doing it wrong. Get the current transform, modify it and then set that new version of the transform.

              What you are doing is modify a copy of the transform object used by the scene. So it won’t have any influence.

              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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