Problems with rotating object about its own axis in Qt3D (QML)

[James321]

I have imported several .obj files from blender into QML. I need to scale certain objects and rotate them about their own axis (not an axis about the origin).

I can easily scale and rotate about the origin as follows:

Transform {
        id: rotationTransform
        property real userAngle: 0.0
        scale3D: Qt.vector3d(200, 200, 200)
        rotation: fromEulerAngles(0,0,userAngle)
        // or rotationX: userAngle         
    }

Scaling and rotating about the object's own axis is something I cant seem to do

I have tried the following:

    Transform {
        id: rotationTransform
        property real rotationAngle: 0.0
        matrix: {
            var r = rotateAround(Qt.vector3d(1, 1, 1), rotationAngle, Qt.vector3d(1, 1, 1));
            var s = Qt.matrix4x4();
            s.scale(200);
            return r * s;
        }
    }

    Transform {
        id: rotationTransform
        property real userAngle: 0.0
        scale3D: Qt.vector3d(200, 200, 200)
       matrix: rotateAround(Qt.vector3d(200, 200, 200), userAngle, Qt.vector3d(0, 0, 1))
    }

    Rotation{
        id: rotationTransform
        property real rotationAngle: 0.0
        axis: Qt.vector3d(0, 0, 1)
        origin: Qt.vector3d(1, 1, 1)
        angle: rotationAngle
    }

                Transform {
                    id: rotationTransform
                    property real userAngle: 0.0
                    matrix: {
                        var m = Qt.matrix4x4();
                        m.translate(Qt.vector3d(8.06, -18.04, 14.28));
                        m.rotate(userAngle, Qt.vector3d(0, 0, 1))
                        m.translate(Qt.vector3d(-8.06, 18.04, -14.28));
                        return m;
                    }
                    scale3D: Qt.vector3d(200, 200, 200)
                }

[Locked as duplicate of https://forum.qt.io/topic/81457/problem-with-qt3d-rotation-about-axis-of-object ~kshegunov]