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** Copyright (C) 2018 The Qt Company Ltd.
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#ifndef Q3DSSCENEPICKER_H
#define Q3DSSCENEPICKER_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//


#include <QtCore/QObject>
#include <QtCore/QSize>
#include <QtCore/QQueue>
#include <QtCore/QPoint>
#include <Qt3DRender/QRayCaster>

#include "q3dsruntimeglobal_p.h"

QT_BEGIN_NAMESPACE

class Q3DSSceneManager;
class Q3DSGraphObject;
class Q3DSLayerNode;
class Q3DSInputManager;

class Q3DSV_PRIVATE_EXPORT Q3DSScenePicker : public QObject
{
    Q_OBJECT
public:
    Q3DSScenePicker(Q3DSSceneManager *manager);
    ~Q3DSScenePicker() override;

    QPoint pickPoint() const;
    Q3DSLayerNode *pickLayer() const;
    bool isHit() const;

    void pick(const QPoint &point, Q3DSLayerNode *targetLayer = nullptr);

    QVector<Q3DSGraphObject *> objects() const;
    QVector<qreal> distances() const;

    Q_SIGNAL void ready();

    void clearPicks();
    void addPick(Q3DSGraphObject *object, qreal distance);
    void pickReady();

private:

    QPoint m_point;
    QVector<Q3DSGraphObject *> m_objects;
    QVector<qreal>  m_distances;
    Q3DSLayerNode *m_layer = nullptr;
    Q3DSInputManager *m_inputManager = nullptr;
};

QT_END_NAMESPACE

#endif // Q3DSSCENEPICKER_H
