Polygon.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
 * Copyright (C) 2005 2006 Refractions Research Inc.
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: geom/Polygon.java r320 (JTS-1.12)
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
#include <string>
#include <vector>
#include <geos/geom/Geometry.h> // for inheritance
#include <geos/geom/Envelope.h> // for proper use of unique_ptr<>
#include <geos/geom/LinearRing.h>
#include <geos/geom/Dimension.h> // for Dimension::DimensionType
#include <geos/geom/SurfaceImpl.h>
 
#include <memory> // for unique_ptr
 
// Forward declarations
namespace geos {
namespace geom { // geos::geom
class Coordinate;
class CoordinateSequenceFilter;
class LineString;
}
}
 
namespace geos {
namespace geom { // geos::geom

class GEOS_DLL Polygon: public SurfaceImpl<LinearRing> {
 
public:
 
    friend class GeometryFactory;

    typedef std::vector<const Polygon*> ConstVect;
 
    ~Polygon() override = default;
 
    std::unique_ptr<CoordinateSequence>
    getCoordinates() const override;

    std::unique_ptr<Polygon> clone() const
    {
        return std::unique_ptr<Polygon>(cloneImpl());
    }

    std::unique_ptr<Geometry> getBoundary() const override;
 
    std::string getGeometryType() const override;
    GeometryTypeId getGeometryTypeId() const override;
 
    std::unique_ptr<Surface> getCurved(const algorithm::LineToCurveParams& params) const {
        return std::unique_ptr<Surface>(getCurvedImpl(params));
    }
 
    std::unique_ptr<Polygon> getLinearized(const algorithm::CurveToLineParams&) const;
 
    void normalize() override;
 
    std::unique_ptr<Polygon> reverse() const { return std::unique_ptr<Polygon>(reverseImpl()); }
 
    double getArea() const override;
 
    bool isRectangle() const override;

    void orientRings(bool exteriorCW);
 
protected:
 
    using SurfaceImpl::SurfaceImpl;
 
    Surface* getCurvedImpl(const algorithm::LineToCurveParams&) const override;
 
    Polygon* getLinearizedImpl(const algorithm::CurveToLineParams&) const override { return cloneImpl(); };
 
    Polygon* cloneImpl() const override { return new Polygon(*this); }
 
    Polygon* reverseImpl() const override;
 
    int
    getSortIndex() const override
    {
        return SORTINDEX_POLYGON;
    };
 
 
private:
 
    static void normalize(LinearRing* ring, bool clockwise);
 
};
 
} // namespace geos::geom
} // namespace geos