Polygonizer.h

/**********************************************************************
 * $Id: Polygonizer.h 2567 2009-06-08 16:58:42Z strk $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.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>

// 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 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(std::vector<EdgeRing*> *edgeRingList,
                        std::vector<EdgeRing*> *validEdgeRingList,
                        std::vector<geom::LineString*> *invalidRingList);

        void findShellsAndHoles(std::vector<EdgeRing*> *edgeRingList);

        static void assignHolesToShells(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();

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


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

        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

#endif // GEOS_OP_POLYGONIZE_POLYGONIZER_H

/**********************************************************************
 * $Log$
 * Revision 1.2  2006/06/12 17:15:29  strk
 * Removed unused parameters warning
 *
 * Revision 1.1  2006/03/22 11:19:06  strk
 * opPolygonize.h headers split.
 *
 **********************************************************************/

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