qgs3daxis.h

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/***************************************************************************
  qgs3daxis.h
  --------------------------------------
  Date                 : March 2022
  Copyright            : (C) 2022 by Jean Felder
  Email                : jean dot felder at oslandia dot com
  ***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
#ifndef QGS3DAXIS_H
#define QGS3DAXIS_H
 
#include "qgis_3d.h"
#include "qgs3daxissettings.h"
#include "qgscoordinatereferencesystem.h"
 
#include <QCursor>
#include <QObject>
#include <QVector3D>
#include <Qt3DRender/QAbstractRayCaster>
#include <Qt3DRender/QPickingSettings>
 
#define SIP_NO_FILE
 
namespace Qt3DCore
{
  class QEntity;
  class QTransform;
} //namespace Qt3DCore
 
namespace Qt3DExtras
{
  class QText2DEntity;
}
 
namespace Qt3DRender
{
  class QCamera;
  class QScreenRayCaster;
} //namespace Qt3DRender
 
class QgsCameraController;
class Qgs3DMapCanvas;
class Qgs3DMapSettings;
class Qgs3DMapScene;
class Qgs3DAxisRenderView;
class QMenu;

class _3D_EXPORT Qgs3DAxis : public QObject
{
    Q_OBJECT
  public:
    Qgs3DAxis( Qgs3DMapCanvas *canvas, Qt3DCore::QEntity *parent3DScene, Qgs3DMapScene *mapScene, QgsCameraController *camera, Qgs3DMapSettings *map );
    ~Qgs3DAxis() override;

    QVector3D from3DTo2DLabelPosition( const QVector3D &sourcePos, Qt3DRender::QCamera *sourceCamera, Qt3DRender::QCamera *destCamera );

    void onViewportScaleFactorChanged( double scaleFactor );

    bool handleEvent( QEvent *event );
 
  public slots:

    void onAxisSettingsChanged();
 
  private slots:
 
    void onCameraUpdate();
    void onAxisViewportSizeUpdate();
 
    // axis picking and menu
    void onTouchedByRay( const Qt3DRender::QAbstractRayCaster::Hits &hits );
    void onAxisModeChanged( Qgs3DAxisSettings::Mode mode );
 
  private:
    void createAxisScene();
    void createAxis( Qt::Axis axis );
    void createCube();
    void setEnableCube( bool show );
    void setEnableAxis( bool show );
    void updateAxisLabelPosition();
    void updateAxisLabelText( Qt3DExtras::QText2DEntity *textEntity, const QString &text );
    QFont createFont( int pointSize );
 
    void constructAxisScene( Qt3DCore::QEntity *parent3DScene );
    void constructLabelsScene( Qt3DCore::QEntity *parent3DScene );
 
    Qt3DExtras::QText2DEntity *addCubeText( const QString &text, float textHeight, float textWidth, const QFont &font, const QMatrix4x4 &rotation, const QVector3D &translation );
 
    // axis picking and menu
    void init3DObjectPicking();
    void createMenu();
    void hideMenu();
    void displayMenuAt( const QPoint &position );
 
    Qgs3DMapSettings *mMapSettings = nullptr;
    Qgs3DMapCanvas *mCanvas = nullptr;
    Qgs3DMapScene *mMapScene = nullptr;
    QgsCameraController *mCameraController = nullptr;
 
    float mCylinderLength = 40.0f;
    int mFontSize = 12;
 
    Qgs3DAxisRenderView *mRenderView = nullptr;
    Qt3DCore::QEntity *mAxisSceneEntity = nullptr;
    Qt3DRender::QCamera *mAxisCamera = nullptr;
 
    Qt3DCore::QEntity *mAxisRoot = nullptr;
    Qt3DCore::QEntity *mCubeRoot = nullptr;
    QList<Qt3DExtras::QText2DEntity *> mCubeLabels;
 
    Qt3DExtras::QText2DEntity *mTextX = nullptr;
    Qt3DExtras::QText2DEntity *mTextY = nullptr;
    Qt3DExtras::QText2DEntity *mTextZ = nullptr;
    QVector3D mTextCoordX;
    QVector3D mTextCoordY;
    QVector3D mTextCoordZ;
    Qt3DCore::QTransform *mTextTransformX = nullptr;
    Qt3DCore::QTransform *mTextTransformY = nullptr;
    Qt3DCore::QTransform *mTextTransformZ = nullptr;
    QgsCoordinateReferenceSystem mCrs;
    QVector3D mPreviousVector;
    double mAxisScaleFactor = 1.0;
 
    Qt3DRender::QCamera *mTwoDLabelCamera = nullptr;
    Qt3DCore::QEntity *mTwoDLabelSceneEntity = nullptr;
 
    // axis picking and menu
    Qt3DRender::QScreenRayCaster *mScreenRayCaster = nullptr;
    bool mIsDragging = false;
    bool mHasClicked = false;
    QPoint mLastClickedPos;
    Qt::MouseButton mLastClickedButton;
    QCursor mPreviousCursor = Qt::ArrowCursor;
    Qt3DRender::QPickingSettings::PickMethod mDefaultPickingMethod;
    QMenu *mMenu = nullptr;
};
 
#endif // QGS3DAXIS_H