qgsellipse.h

Go to the documentation of this file.

/***************************************************************************
                         qgsellipse.h
                         --------------
    begin                : March 2017
    copyright            : (C) 2017 by Loîc Bartoletti
    email                : lbartoletti at tuxfamily dot org
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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 QGSELLIPSE_H
#define QGSELLIPSE_H
 
#include <QString>
 
#include "qgis_core.h"
#include "qgspoint.h"
#include "qgspolygon.h"
#include "qgslinestring.h"
#include "qgsrectangle.h"
 
class CORE_EXPORT QgsEllipse
{
 
  public:
 
    QgsEllipse() = default;
 
    virtual ~QgsEllipse() = default;
 
    QgsEllipse( const QgsPoint &center, double semiMajorAxis, double semiMinorAxis, double azimuth = 90 );
 
    static QgsEllipse fromFoci( const QgsPoint &pt1, const QgsPoint &pt2, const QgsPoint &pt3 );
 
    static QgsEllipse fromExtent( const QgsPoint &pt1, const QgsPoint &pt2 );
 
    static QgsEllipse fromCenterPoint( const QgsPoint &ptc, const QgsPoint &pt1 );
 
    static QgsEllipse fromCenter2Points( const QgsPoint &ptc, const QgsPoint &pt1, const QgsPoint &pt2 );
 
    virtual bool operator ==( const QgsEllipse &elp ) const;
    virtual bool operator !=( const QgsEllipse &elp ) const;
 
    virtual bool isEmpty() const;
 
    QgsPoint center() const {return mCenter; }
 
    double semiMajorAxis() const {return mSemiMajorAxis; }
 
    double semiMinorAxis() const {return mSemiMinorAxis; }
 
    double azimuth() const {return mAzimuth; }
 
    QgsPoint &rcenter() SIP_SKIP { return mCenter; }
 
    void setCenter( const QgsPoint &center ) {mCenter = center; }
 
    virtual void setSemiMajorAxis( double semiMajorAxis );
 
    virtual void setSemiMinorAxis( double semiMinorAxis );
 
    void setAzimuth( double azimuth );
 
    virtual double focusDistance() const;
 
    virtual QVector<QgsPoint> foci() const;
 
    virtual double eccentricity() const;
    virtual double area() const;
    virtual double perimeter() const;
 
    virtual QVector<QgsPoint> quadrant() const;
 
    virtual QgsPointSequence points( unsigned int segments = 36 ) const;
 
    virtual QgsPolygon *toPolygon( unsigned int segments = 36 ) const SIP_FACTORY;
 
    virtual QgsLineString *toLineString( unsigned int segments = 36 ) const SIP_FACTORY;
    //virtual QgsCurvePolygon toCurvePolygon() const;
 
    virtual QgsPolygon *orientedBoundingBox() const SIP_FACTORY;
 
    virtual QgsRectangle boundingBox() const;
 
    virtual QString toString( int pointPrecision = 17, int axisPrecision = 17, int azimuthPrecision = 2 ) const;
 
#ifdef SIP_RUN
    SIP_PYOBJECT __repr__();
    % MethodCode
    QString str = QStringLiteral( "<QgsEllipse: %1>" ).arg( sipCpp->toString() );
    sipRes = PyUnicode_FromString( str.toUtf8().constData() );
    % End
#endif
 
  protected:
    QgsPoint mCenter;
    double mSemiMajorAxis = 0.0;
    double mSemiMinorAxis = 0.0;
    double mAzimuth = 90.0;
 
  private:
    void normalizeAxis();
};
 
#endif // QGSELLIPSE_H