qgslinestring.h

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/***************************************************************************
                         qgslinestring.h
                         -----------------
    begin                : September 2014
    copyright            : (C) 2014 by Marco Hugentobler
    email                : marco at sourcepole dot 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 QGSLINESTRINGV2_H
#define QGSLINESTRINGV2_H


#include <QPolygonF>

#include "qgis_core.h"
#include "qgis.h"
#include "qgscurve.h"
#include "qgscompoundcurve.h"

class QgsLineSegment2D;

/***************************************************************************
 * This class is considered CRITICAL and any change MUST be accompanied with
 * full unit tests in testqgsgeometry.cpp.
 * See details in QEP #17
 ****************************************************************************/

class CORE_EXPORT QgsLineString: public QgsCurve
{
  public:
    QgsLineString();

    QgsLineString( const QVector<QgsPoint> &points );

    QgsLineString( const QVector<double> &x, const QVector<double> &y,
                   const QVector<double> &z = QVector<double>(),
                   const QVector<double> &m = QVector<double>() );

    QgsLineString( const QgsPoint &p1, const QgsPoint &p2 );

    QgsLineString( const QVector<QgsPointXY> &points );

    explicit QgsLineString( const QgsLineSegment2D &segment );

    bool equals( const QgsCurve &other ) const override;

    QgsPoint pointN( int i ) const;

    double xAt( int index ) const override;
    double yAt( int index ) const override;

    const double *xData() const SIP_SKIP
    {
      return mX.constData();
    }

    const double *yData() const SIP_SKIP
    {
      return mY.constData();
    }

    const double *zData() const SIP_SKIP
    {
      if ( mZ.empty() )
        return nullptr;
      else
        return mZ.constData();
    }

    const double *mData() const SIP_SKIP
    {
      if ( mM.empty() )
        return nullptr;
      else
        return mM.constData();
    }

    double zAt( int index ) const
    {
      if ( index >= 0 && index < mZ.size() )
        return mZ.at( index );
      else
        return std::numeric_limits<double>::quiet_NaN();
    }

    double mAt( int index ) const
    {
      if ( index >= 0 && index < mM.size() )
        return mM.at( index );
      else
        return std::numeric_limits<double>::quiet_NaN();
    }

    void setXAt( int index, double x );

    void setYAt( int index, double y );

    void setZAt( int index, double z )
    {
      if ( index >= 0 && index < mZ.size() )
        mZ[ index ] = z;
    }

    void setMAt( int index, double m )
    {
      if ( index >= 0 && index < mM.size() )
        mM[ index ] = m;
    }

    void setPoints( const QgsPointSequence &points );

    void append( const QgsLineString *line );

    void addVertex( const QgsPoint &pt );

    void close();

    QgsCompoundCurve *toCurveType() const override SIP_FACTORY;

    void extend( double startDistance, double endDistance );

    //reimplemented methods

    QString geometryType() const override;
    int dimension() const override;
    QgsLineString *clone() const override SIP_FACTORY;
    void clear() override;
    bool isEmpty() const override;
    QgsLineString *snappedToGrid( double hSpacing, double vSpacing, double dSpacing = 0, double mSpacing = 0 ) const override SIP_FACTORY;
    bool removeDuplicateNodes( double epsilon = 4 * std::numeric_limits<double>::epsilon(), bool useZValues = false ) override;
    QPolygonF asQPolygonF() const override;

    bool fromWkb( QgsConstWkbPtr &wkb ) override;
    bool fromWkt( const QString &wkt ) override;

    QByteArray asWkb() const override;
    QString asWkt( int precision = 17 ) const override;
    QDomElement asGml2( QDomDocument &doc, int precision = 17, const QString &ns = "gml", QgsAbstractGeometry::AxisOrder axisOrder = QgsAbstractGeometry::AxisOrder::XY ) const override;
    QDomElement asGml3( QDomDocument &doc, int precision = 17, const QString &ns = "gml", QgsAbstractGeometry::AxisOrder axisOrder = QgsAbstractGeometry::AxisOrder::XY ) const override;
    QString asJson( int precision = 17 ) const override;

    //curve interface
    double length() const override;
    QgsPoint startPoint() const override;
    QgsPoint endPoint() const override;

    QgsLineString *curveToLine( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const override  SIP_FACTORY;

    int numPoints() const override;
    int nCoordinates() const override;
    void points( QgsPointSequence &pt SIP_OUT ) const override;

    void draw( QPainter &p ) const override;

    void transform( const QgsCoordinateTransform &ct, QgsCoordinateTransform::TransformDirection d = QgsCoordinateTransform::ForwardTransform, bool transformZ = false ) override  SIP_THROW( QgsCsException );
    void transform( const QTransform &t, double zTranslate = 0.0, double zScale = 1.0, double mTranslate = 0.0, double mScale = 1.0 ) override;

    void addToPainterPath( QPainterPath &path ) const override;
    void drawAsPolygon( QPainter &p ) const override;

    bool insertVertex( QgsVertexId position, const QgsPoint &vertex ) override;
    bool moveVertex( QgsVertexId position, const QgsPoint &newPos ) override;
    bool deleteVertex( QgsVertexId position ) override;

    QgsLineString *reversed() const override SIP_FACTORY;

    double closestSegment( const QgsPoint &pt, QgsPoint &segmentPt SIP_OUT, QgsVertexId &vertexAfter SIP_OUT, int *leftOf SIP_OUT = nullptr, double epsilon = 4 * std::numeric_limits<double>::epsilon() ) const override;
    bool pointAt( int node, QgsPoint &point, QgsVertexId::VertexType &type ) const override;

    QgsPoint centroid() const override;

    void sumUpArea( double &sum SIP_OUT ) const override;
    double vertexAngle( QgsVertexId vertex ) const override;
    double segmentLength( QgsVertexId startVertex ) const override;
    bool addZValue( double zValue = 0 ) override;
    bool addMValue( double mValue = 0 ) override;

    bool dropZValue() override;
    bool dropMValue() override;
    void swapXy() override;

    bool convertTo( QgsWkbTypes::Type type ) override;

#ifndef SIP_RUN
    void filterVertices( const std::function< bool( const QgsPoint & ) > &filter ) override;

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

    QgsLineString *createEmptyWithSameType() const override SIP_FACTORY;

#ifdef SIP_RUN
    SIP_PYOBJECT __repr__();
    % MethodCode
    QString str = QStringLiteral( "<QgsLineString: %1>" ).arg( sipCpp->asWkt() );
    sipRes = PyUnicode_FromString( str.toUtf8().data() );
    % End
#endif

  protected:

    QgsRectangle calculateBoundingBox() const override;

  private:
    QVector<double> mX;
    QVector<double> mY;
    QVector<double> mZ;
    QVector<double> mM;

    void importVerticesFromWkb( const QgsConstWkbPtr &wkb );

    void fromWkbPoints( QgsWkbTypes::Type type, const QgsConstWkbPtr &wkb )
    {
      mWkbType = type;
      importVerticesFromWkb( wkb );
    }

    friend class QgsPolygon;
    friend class QgsTriangle;

};

// clazy:excludeall=qstring-allocations

#endif // QGSLINESTRINGV2_H