qgstriangulation.h

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/***************************************************************************
                          Triangulation.h  -  description
                             -------------------
    copyright            : (C) 2004 by Marco Hugentobler
    email                : mhugent@geo.unizh.ch
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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 TRIANGULATION_H
#define TRIANGULATION_H
 
#include "TriangleInterpolator.h"
#include "qgis.h"
#include "qgis_analysis.h"
#include "qgis_sip.h"
#include "qgsinterpolator.h"
#include "qgsmeshdataprovider.h"
 
#include <QList>
#include <QPainter>
 
#define SIP_NO_FILE
 
class QgsFeatureSink;
class QgsFields;
class QgsFeedback;
 

class ANALYSIS_EXPORT QgsTriangulation
{
  public:
    enum class ForcedCrossBehavior SIP_MONKEYPATCH_SCOPEENUM_UNNEST( QgsTriangulation, ForcedCrossBehavior ) : int
    {
      SnappingTypeVertex, 
      DeleteFirst,        
      InsertVertex
    };
    virtual ~QgsTriangulation() = default;

    virtual void addLine( const QgsPointSequence &points, Qgis::InterpolationSourceType lineType ) = 0;

    virtual int addPoint( const QgsPoint &point ) = 0;

    virtual bool calcNormal( double x, double y, QgsPoint &result SIP_OUT ) = 0;

    virtual void performConsistencyTest() = 0;

    virtual bool calcPoint( double x, double y, QgsPoint &result SIP_OUT ) = 0;

    virtual QgsPoint *point( int i ) const = 0;

    virtual bool triangleVertices( double x, double y, QgsPoint &p1 SIP_OUT, int &n1 SIP_OUT, QgsPoint &p2 SIP_OUT, int &n2 SIP_OUT, QgsPoint &p3 SIP_OUT, int &n3 SIP_OUT ) = 0;

    virtual bool triangleVertices( double x, double y, QgsPoint &p1 SIP_OUT, QgsPoint &p2 SIP_OUT, QgsPoint &p3 SIP_OUT ) = 0;

    virtual int oppositePoint( int p1, int p2 ) = 0;

    virtual double xMax() const = 0;

    virtual double xMin() const = 0;

    virtual double yMax() const = 0;

    virtual double yMin() const = 0;

    virtual int pointsCount() const = 0;

    virtual QList<int> surroundingTriangles( int pointno ) = 0;

    virtual QList<int> pointsAroundEdge( double x, double y ) = 0;

    //virtual void draw(QPainter* p, double xlowleft, double ylowleft, double xupright, double yupright, double width, double height) const=0;

    virtual void setForcedCrossBehavior( QgsTriangulation::ForcedCrossBehavior b ) = 0;

    virtual void setTriangleInterpolator( TriangleInterpolator *interpolator ) = 0;

    virtual void eliminateHorizontalTriangles() = 0;

    virtual void ruppertRefinement() = 0;

    virtual bool pointInside( double x, double y ) = 0;

    //virtual bool readFromTAFF(QString fileName)=0;

    //virtual bool saveToTAFF(QString fileName) const=0;

    virtual bool swapEdge( double x, double y ) = 0;

    static QgsFields triangulationFields();

    virtual bool saveTriangulation( QgsFeatureSink *sink, QgsFeedback *feedback = nullptr ) const = 0;

    virtual QgsMesh triangulationToMesh( QgsFeedback *feedback = nullptr ) const = 0;
};
 
#endif