operation/polygonize/EdgeRing.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 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: operation/polygonize/EdgeRing.java rev. 109/138 (JTS-1.10)
 *
 **********************************************************************/
 
 
#ifndef GEOS_OP_POLYGONIZE_EDGERING_H
#define GEOS_OP_POLYGONIZE_EDGERING_H
 
#include <geos/export.h>
 
#include <vector>
 
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif
 
// Forward declarations
namespace geos {
        namespace geom { 
                class LineString;
                class LinearRing;
                class Polygon;
                class CoordinateSequence;
                class Geometry;
                class GeometryFactory;
                class Coordinate;
        }
        namespace planargraph { 
                class DirectedEdge;
        }
}
 
namespace geos {
namespace operation { // geos::operation
namespace polygonize { // geos::operation::polygonize

class GEOS_DLL EdgeRing {
private:
        const geom::GeometryFactory *factory; 
 
        typedef std::vector<const planargraph::DirectedEdge*> DeList;
        DeList deList;
 
        // cache the following data for efficiency
        geom::LinearRing *ring;
        geom::CoordinateSequence *ringPts;
 
        typedef std::vector<geom::Geometry*> GeomVect;
        GeomVect *holes;

        geom::CoordinateSequence* getCoordinates();
 
        static void addEdge(const geom::CoordinateSequence *coords,
                        bool isForward,
                        geom::CoordinateSequence *coordList);
 
public:
        static EdgeRing* findEdgeRingContaining(
                        EdgeRing *testEr,
                        std::vector<EdgeRing*> *shellList);

        static const geom::Coordinate& ptNotInList(
                        const geom::CoordinateSequence *testPts,
                        const geom::CoordinateSequence *pts);

        static bool isInList(const geom::Coordinate &pt,
                        const geom::CoordinateSequence *pts);
 
        EdgeRing(const geom::GeometryFactory *newFactory);
 
        ~EdgeRing();

        void add(const planargraph::DirectedEdge *de);

        bool isHole();

        void addHole(geom::LinearRing *hole);

        geom::Polygon* getPolygon();

        bool isValid();

        geom::LineString* getLineString();

        geom::LinearRing* getRingInternal();

        geom::LinearRing* getRingOwnership();
};
 
} // namespace geos::operation::polygonize
} // namespace geos::operation
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // GEOS_OP_POLYGONIZE_EDGERING_H