qgstriangle.h

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/***************************************************************************
                         qgstriangle.h
                         -------------------
    begin                : January 2017
    copyright            : (C) 2017 by Loïc 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 QGSTRIANGLE_H
#define QGSTRIANGLE_H

#include "qgis_core.h"
#include "qgis.h"
#include "qgspolygon.h"
#include "qgscircle.h"
#include "qgslinestring.h"

class CORE_EXPORT QgsTriangle : public QgsPolygon
{
  public:
    QgsTriangle();

    QgsTriangle( const QgsPoint &p1, const QgsPoint &p2, const QgsPoint &p3 );

    explicit QgsTriangle( const QgsPointXY &p1, const QgsPointXY &p2, const QgsPointXY &p3 );

    explicit QgsTriangle( const QPointF p1, const QPointF p2, const QPointF p3 );

    bool operator==( const QgsTriangle &other ) const;
    bool operator!=( const QgsTriangle &other ) const;

    QString geometryType() const override;
    QgsTriangle *clone() const override SIP_FACTORY;
    void clear() override;

    bool fromWkb( QgsConstWkbPtr &wkbPtr ) override;

    bool fromWkt( const QString &wkt ) override;

    // inherited: QString asWkt( int precision = 17 ) const;
    // inherited (as a polygon): QDomElement asGML2( QDomDocument &doc, int precision = 17, const QString &ns = "gml" ) const;
    QDomElement asGml3( QDomDocument &doc, int precision = 17, const QString &ns = "gml" ) const override;

    QgsPolygon *surfaceToPolygon() const override SIP_FACTORY;

    QgsCurvePolygon *toCurveType() const override SIP_FACTORY;

    void addInteriorRing( QgsCurve *ring SIP_TRANSFER ) override;

    void setInteriorRings( const QVector< QgsCurve *> &rings ) = delete;
    bool deleteVertex( QgsVertexId position ) override;
    bool insertVertex( QgsVertexId position, const QgsPoint &vertex ) override;
    bool moveVertex( QgsVertexId vId, const QgsPoint &newPos ) override;

    void setExteriorRing( QgsCurve *ring SIP_TRANSFER ) override;

    QgsCurve *boundary() const override SIP_FACTORY;

    // inherited: double pointDistanceToBoundary( double x, double y ) const;

    QgsPoint vertexAt( int atVertex ) const;

    QVector<double> lengths() const;

    QVector<double> angles() const;

    bool isDegenerate();

    bool isIsocele( double lengthTolerance = 0.0001 ) const;

    bool isEquilateral( double lengthTolerance = 0.0001 ) const;

    bool isRight( double angleTolerance = 0.0001 ) const;

    bool isScalene( double lengthTolerance = 0.0001 ) const;

    QVector<QgsLineString> altitudes() const;

    QVector<QgsLineString> medians() const;

    QVector<QgsLineString> bisectors( double lengthTolerance = 0.0001 ) const;

    QgsTriangle medial() const;

    QgsPoint orthocenter( double lengthTolerance = 0.0001 ) const;

    QgsPoint circumscribedCenter() const;

    double circumscribedRadius() const;

    QgsCircle circumscribedCircle() const;

    QgsPoint inscribedCenter() const;

    double inscribedRadius() const;

    QgsCircle inscribedCircle() const;

#ifndef SIP_RUN

    inline const QgsTriangle *cast( const QgsAbstractGeometry *geom ) const
    {
      if ( geom && QgsWkbTypes::flatType( geom->wkbType() ) == QgsWkbTypes::Triangle )
        return static_cast<const QgsTriangle *>( geom );
      return nullptr;
    }
#endif

    QgsTriangle *createEmptyWithSameType() const override SIP_FACTORY;


};
#endif // QGSTRIANGLE_H