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++ // Copyright (C) 2020 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include <QtQuick3D/qquick3dinstancing.h>
++ QT_FORWARD_DECLARE_CLASS(QRandomGenerator)
++ //! [properties]
++ 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)
++ //! [properties]
++ 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;
++ };