qgscircle.h

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/***************************************************************************
                         qgscircle.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 QGSCIRCLE_H
#define QGSCIRCLE_H

#include <QString>

#include "qgis_core.h"
#include "qgsellipse.h"
#include "qgspoint.h"
#include "qgspolygon.h"
#include "qgsrectangle.h"
#include "qgscircularstring.h"


class CORE_EXPORT QgsCircle : public QgsEllipse
{
  public:
    QgsCircle();

    QgsCircle( const QgsPoint &center, double radius, double azimuth = 0 );

    static QgsCircle from2Points( const QgsPoint &pt1, const QgsPoint &pt2 );

    static QgsCircle from3Points( const QgsPoint &pt1, const QgsPoint &pt2, const QgsPoint &pt3, double epsilon = 1E-8 );

    static QgsCircle fromCenterDiameter( const QgsPoint &center, double diameter, double azimuth = 0 );


    static QgsCircle fromCenterPoint( const QgsPoint &center, const QgsPoint &pt1 );


    static QgsCircle from3Tangents( const QgsPoint &pt1_tg1, const QgsPoint &pt2_tg1,
                                    const QgsPoint &pt1_tg2, const QgsPoint &pt2_tg2,
                                    const QgsPoint &pt1_tg3, const QgsPoint &pt2_tg3, double epsilon = 1E-8 );

    static QgsCircle fromExtent( const QgsPoint &pt1, const QgsPoint &pt2 );

    static QgsCircle minimalCircleFrom3Points( const QgsPoint &pt1, const QgsPoint &pt2, const QgsPoint &pt3, double epsilon = 1E-8 );

    double area() const override;
    double perimeter() const override;

    //inherited
    // void setAzimuth(const double azimuth);
    // double azimuth() const {return mAzimuth; }


    void setSemiMajorAxis( const double semiMajorAxis ) override;

    void setSemiMinorAxis( const double semiMinorAxis ) override;

    double radius() const {return mSemiMajorAxis;}
    void setRadius( double radius )
    {
      mSemiMajorAxis = std::fabs( radius );
      mSemiMinorAxis = mSemiMajorAxis;
    }

    QVector<QgsPoint> northQuadrant() const SIP_FACTORY;

    QgsCircularString *toCircularString( bool oriented = false ) const;

    bool contains( const QgsPoint &point, double epsilon = 1E-8 ) const;

    QgsRectangle boundingBox() const override;

    QString toString( int pointPrecision = 17, int radiusPrecision = 17, int azimuthPrecision = 2 ) const override;

};

#endif // QGSCIRCLE_H