EdgeGraph.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2020 Paul Ramsey <pramsey@cleverelephant.ca>
 *
 * 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.
 *
 **********************************************************************/
 
 
#pragma once
 
#include <geos/edgegraph/HalfEdge.h>
 
#include <geos/export.h>
#include <string>
#include <cassert>
#include <map>
#include <array>
#include <memory>
#include <vector>
 
// Forward declarations
namespace geos {
namespace geom {
class Coordinate;
}
}
 
#undef EDGEGRAPH_HEAPHACK
 
namespace geos {
namespace edgegraph { // geos.edgegraph
 
 
class GEOS_DLL EdgeGraph {
 
private:
 
    std::deque<HalfEdge> edges;
    std::map<geom::Coordinate, HalfEdge*> vertexMap;
 
    HalfEdge* create(const geom::Coordinate& p0, const geom::Coordinate& p1);
 
 
protected:
 
    HalfEdge* createEdge(const geom::Coordinate& orig);
 
    HalfEdge* insert(const geom::Coordinate& orig, const geom::Coordinate& dest, HalfEdge* eAdj);
 
 
public:
 
    EdgeGraph() {};
 
    HalfEdge* addEdge(const geom::Coordinate& orig, const geom::Coordinate& dest);
 
    static bool isValidEdge(const geom::Coordinate& orig, const geom::Coordinate& dest);
 
    void getVertexEdges(std::vector<const HalfEdge*>& edgesOut);
 
    HalfEdge* findEdge(const geom::Coordinate& orig, const geom::Coordinate& dest);
 
 
 
 
 
 
};
 
 
} // namespace geos.edgegraph
} // namespace geos