PolygonizeGraph.h

/**********************************************************************
 * $Id: PolygonizeGraph.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/PolygonizeGraph.java rev. 1.6 (JTS-1.10)
 *
 **********************************************************************/


#ifndef GEOS_OP_POLYGONIZE_POLYGONIZEGRAPH_H
#define GEOS_OP_POLYGONIZE_POLYGONIZEGRAPH_H

#include <geos/export.h>

#include <geos/planargraph/PlanarGraph.h> // for inheritance

#include <vector>

// Forward declarations
namespace geos {
        namespace geom { 
                class LineString;
                class GeometryFactory;
                class Coordinate;
                class CoordinateSequence;
        }
        namespace planargraph { 
                class Node;
                class Edge;
                class DirectedEdge;
        }
        namespace operation { 
                namespace polygonize {
                        class EdgeRing;
                        class PolygonizeDirectedEdge;
                }
        }
}

namespace geos {
namespace operation { // geos::operation
namespace polygonize { // geos::operation::polygonize


class GEOS_DLL PolygonizeGraph: public planargraph::PlanarGraph {

public:

        static void deleteAllEdges(planargraph::Node *node);

        PolygonizeGraph(const geom::GeometryFactory *newFactory);

        ~PolygonizeGraph();

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

        std::vector<EdgeRing*>* getEdgeRings();

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

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

private:

        static int getDegreeNonDeleted(planargraph::Node *node);

        static int getDegree(planargraph::Node *node, long label);

        const geom::GeometryFactory *factory;

        planargraph::Node* getNode(const geom::Coordinate& pt);

        void computeNextCWEdges();

        void convertMaximalToMinimalEdgeRings(
                        std::vector<PolygonizeDirectedEdge*> *ringEdges);

        static std::vector<planargraph::Node*>* findIntersectionNodes(
                        PolygonizeDirectedEdge *startDE,
                        long label);

        static std::vector<PolygonizeDirectedEdge*>* findLabeledEdgeRings(
                        std::vector<planargraph::DirectedEdge*> &dirEdges);

        static void label(std::vector<planargraph::DirectedEdge*> &dirEdges, long label);

        static void computeNextCWEdges(planargraph::Node *node);

        static void computeNextCCWEdges(planargraph::Node *node, long label);

        static std::vector<planargraph::DirectedEdge*>* findDirEdgesInRing(
                        PolygonizeDirectedEdge *startDE);

        EdgeRing* findEdgeRing(PolygonizeDirectedEdge *startDE);

        /* Tese are for memory management */
        std::vector<planargraph::Edge *>newEdges;
        std::vector<planargraph::DirectedEdge *>newDirEdges;
        std::vector<planargraph::Node *>newNodes;
        std::vector<EdgeRing *>newEdgeRings;
        std::vector<geom::CoordinateSequence *>newCoords;
};

} // namespace geos::operation::polygonize
} // namespace geos::operation
} // namespace geos

#endif // GEOS_OP_POLYGONIZE_POLYGONIZEGRAPH_H

/**********************************************************************
 * $Log$
 * Revision 1.1  2006/03/22 11:19:06  strk
 * opPolygonize.h headers split.
 *
 **********************************************************************/

---