PolygonizeGraph.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/PolygonizeGraph.java rev. 974
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
 
#include <geos/planargraph/PlanarGraph.h> // for 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 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);
 
    explicit PolygonizeGraph(const geom::GeometryFactory* newFactory);
 
    ~PolygonizeGraph() override;
 
    void addEdge(const geom::LineString* line);
 
    void getEdgeRings(std::vector<EdgeRing*>& edgeRingList);
 
    void deleteCutEdges(std::vector<const geom::LineString*>& cutLines);
 
    void deleteDangles(std::vector<const geom::LineString*>& dangleLines);
 
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 void findIntersectionNodes(PolygonizeDirectedEdge* startDE,
                                      long label, std::vector<planargraph::Node*>& intNodes
                                     );
 
    static void findLabeledEdgeRings(
        std::vector<planargraph::DirectedEdge*>& dirEdgesIn,
        std::vector<PolygonizeDirectedEdge*>& dirEdgesOut);
 
    static void label(std::vector<PolygonizeDirectedEdge*>& dirEdges, long label);
    static void label(std::vector<planargraph::DirectedEdge*>& dirEdges, long label);
 
    static void computeNextCWEdges(planargraph::Node* node);
 
    static void computeNextCCWEdges(planargraph::Node* node, long label);
 
    EdgeRing* findEdgeRing(PolygonizeDirectedEdge* startDE);
 
    /* These 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
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif