Polygonizer.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2010 Sandro Santilli <strk@keybit.net>
 * 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/Polygonizer.java rev. 1.6 (JTS-1.10)
 *
 **********************************************************************/
 
#ifndef GEOS_OP_POLYGONIZE_POLYGONIZER_H
#define GEOS_OP_POLYGONIZE_POLYGONIZER_H
 
#include <geos/export.h>
#include <geos/geom/GeometryComponentFilter.h> // for LineStringAdder inheritance
 
#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 Geometry;
                class LineString;
                class Polygon;
        }
        namespace operation { 
                namespace polygonize { 
                        class EdgeRing;
                        class PolygonizeGraph;
                }
        }
}
 
namespace geos {
namespace operation { // geos::operation
namespace polygonize { // geos::operation::polygonize

class GEOS_DLL Polygonizer {
private:
        class GEOS_DLL LineStringAdder: public geom::GeometryComponentFilter {
        public:
                Polygonizer *pol;
                LineStringAdder(Polygonizer *p);
                //void filter_rw(geom::Geometry *g);
                void filter_ro(const geom::Geometry * g);
        };
 
        // default factory
        LineStringAdder lineStringAdder;

        void add(const geom::LineString *line);

        void polygonize();
 
        void findValidRings(const std::vector<EdgeRing*>& edgeRingList,
                        std::vector<EdgeRing*>& validEdgeRingList,
                        std::vector<geom::LineString*>& invalidRingList);
 
        void findShellsAndHoles(const std::vector<EdgeRing*>& edgeRingList);
 
        static void assignHolesToShells(const std::vector<EdgeRing*>& holeList,
                        std::vector<EdgeRing*>& shellList);
 
        static void assignHoleToShell(EdgeRing *holeER,
                        std::vector<EdgeRing*>& shellList);
 
protected:
 
        PolygonizeGraph *graph;
 
        // initialize with empty collections, in case nothing is computed
        std::vector<const geom::LineString*> dangles;
        std::vector<const geom::LineString*> cutEdges;
        std::vector<geom::LineString*> invalidRingLines;
 
        std::vector<EdgeRing*> holeList;
        std::vector<EdgeRing*> shellList;
        std::vector<geom::Polygon*> *polyList;
 
public:

        Polygonizer();
 
        ~Polygonizer();

        void add(std::vector<geom::Geometry*> *geomList);

        void add(std::vector<const geom::Geometry*> *geomList);

        void add(geom::Geometry *g);

        void add(const geom::Geometry *g);

        std::vector<geom::Polygon*>* getPolygons();

        const std::vector<const geom::LineString*>& getDangles();
 

        const std::vector<const geom::LineString*>& getCutEdges();

        const std::vector<geom::LineString*>& getInvalidRingLines();
 
// This seems to be needed by    GCC 2.95.4
friend class Polygonizer::LineStringAdder;
};
 
} // namespace geos::operation::polygonize
} // namespace geos::operation
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // GEOS_OP_POLYGONIZE_POLYGONIZER_H