QQuick3DGeometry Class

Detailed Description

The QQuick3DGeometry can be used to specify custom geometry used with Qt Quick 3D.

The user should inherit this class and specify it's own properties, which can then be used from QML code. The user then should use these properties to construct the geometry and set it for the QQuick3DGeometry, which then uploads it to the Qt Quick3D engine.

Example implementation:

 class CustomGeometry : public QQuick3DGeometry
 {
     Q_OBJECT
     ... properties ...

 public:
     CustomGeometry();

     void setProperty(...)
     {
         ...
         rebuildGeometry();
     }

 private:
     void rebuildGeometry()
     {
         QByteArray vertices;
         QByteArray indices;
         fillGeometry(vertices, indices);
         setPrimitiveType(Lines);
         setVertexBuffer(vertices);
         setIndexBuffer(indices);
         setStride(sizeof(QVector3D));
         setBounds(...);
         addAttrubute(PositionSemantic, 0, F32Type);
     }
 };

This class can then be registered as a QML type and used with Model.

 qmlRegisterType<CustomGeometry>("Example", 1, 0, "CustomGeometry");

 import Example 1.0

 Model {
     id: customModel
     geometry: CustomGeometry {
     }
 }