Qt Quick 3D - Custom Instanced Rendering

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#include <QtQuick3D/qquick3dinstancing.h> QT_FORWARD_DECLARE_CLASS(QRandomGenerator) class CppInstanceTable : public QQuick3DInstancing { Q_OBJECT QML_ELEMENT Q_PROPERTY(int gridSize READ gridSize WRITE setGridSize NOTIFY gridSizeChanged) Q_PROPERTY(float gridSpacing READ gridSpacing WRITE setGridSpacing NOTIFY gridSpacingChanged) Q_PROPERTY(int randomSeed READ randomSeed WRITE setRandomSeed NOTIFY randomSeedChanged) public: explicit CppInstanceTable(QQuick3DObject *parent = nullptr); ~CppInstanceTable() override; int gridSize() const; float gridSpacing() const; int randomSeed() const; public slots: void setGridSize(int gridSize); void setGridSpacing(float gridSpacing); void setRandomSeed(int randomSeed); signals: void gridSizeChanged(); void gridSpacingChanged(); void randomSeedChanged(); protected: QByteArray getInstanceBuffer(int *instanceCount) override; private: int m_instanceCount = 0; QByteArray m_instanceData; bool m_dirty = true; int m_gridSize = 0; float m_gridSpacing = 100; int m_randomSeed; };