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  1. Qt
  2. QTBUG-91436

Setting transform matrix by decomposing it into translation, rotation and scale components

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Details

    • Bug
    • Resolution: Unresolved
    • P3: Somewhat important
    • None
    • 5.12, 5.15
    • Qt3D
    • None
    • All
    • All

    Description

      According to Qt3D documentation:

      https://doc.qt.io/qt-5/qt3dcore-qtransform.html#matrix-prop

      It is known that:

      When the matrix property is set, it is decomposed to translation, rotation and scale components.

      This decomposition causes troubles like the one described here:

      https://stackoverflow.com/q/60995155/3405291

      The decomposing operation strips out what is effectively a shear phenomenon.

      Possible suggestions:

      • Giving the `Qt3DCore::QTransform` API an option to store transform matrix as a whole rather than decomposing it into its components
      • Giving the `Qt3DCore::QEntity` API an option to avoid applying parent transformation into the children

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            seanharmer Sean Harmer
            m3g1dd0 Megidd Git
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            Dates

              Created:
              Updated:

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