geomgraph/DirectedEdgeStar.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
 * Copyright (C) 2005-2006 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: geomgraph/DirectedEdgeStar.java r428 (JTS-1.12+)
 *
 **********************************************************************/
 
 
#pragma once
 
#include <memory>
#include <geos/export.h>
#include <set>
#include <string>
#include <vector>
 
#include <geos/geomgraph/EdgeEndStar.h>  // for inheritance
#include <geos/geomgraph/Label.h>  // for private member
#include <geos/geom/Coordinate.h>  // for p0,p1
 
 
// Forward declarations
namespace geos {
namespace geomgraph {
class DirectedEdge;
class EdgeRing;
}
}
 
namespace geos {
namespace geomgraph { // geos.geomgraph
 
class GEOS_DLL DirectedEdgeStar: public EdgeEndStar {
 
public:
 
    DirectedEdgeStar()
        :
        EdgeEndStar(),
        label(),
        resultAreaEdgesComputed(false)
    {}
 
    ~DirectedEdgeStar() override = default;
 
    void insert(EdgeEnd* ee) override;
 
    Label&
    getLabel()
    {
        return label;
    }
 
    int getOutgoingDegree();
 
    int getOutgoingDegree(EdgeRing* er);
 
    DirectedEdge* getRightmostEdge();
 
    void computeLabelling(const std::vector<std::unique_ptr<GeometryGraph>>&geom) override; // throw(TopologyException *);
 
    void mergeSymLabels();
 
    void updateLabelling(const Label& nodeLabel);
 
 
    void linkResultDirectedEdges(); // throw(TopologyException *);
 
    void linkMinimalDirectedEdges(EdgeRing* er);
 
    void linkAllDirectedEdges();
 
    void findCoveredLineEdges();
 
    void computeDepths(DirectedEdge* de);
 
    std::string print() const override;
 
private:
 
    std::vector<DirectedEdge*> resultAreaEdgeList;
 
    Label label;
 
    bool resultAreaEdgesComputed;
 
    const std::vector<DirectedEdge*>& getResultAreaEdges();
 
 
    enum {
        SCANNING_FOR_INCOMING = 1,
        LINKING_TO_OUTGOING
    };
 
    int computeDepths(EdgeEndStar::iterator startIt,
                      EdgeEndStar::iterator endIt, int startDepth);
};
 
 
} // namespace geos.geomgraph
} // namespace geos