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