OverlayGraph.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/export.h>
#include <geos/geom/Coordinate.h>
#include <geos/operation/overlayng/OverlayEdge.h>
#include <geos/operation/overlayng/OverlayLabel.h>
#include <geos/geom/CoordinateSequence.h>
 
#include <unordered_map>
#include <vector>
#include <deque>
 
// Forward declarations
namespace geos {
namespace geom {
}
namespace operation {
namespace overlayng {
class Edge;
}
}
}
 
namespace geos {      // geos.
namespace operation { // geos.operation
namespace overlayng { // geos.operation.overlayng
 
class GEOS_DLL OverlayGraph {
    using Coordinate = geos::geom::Coordinate;
    using CoordinateSequence = geos::geom::CoordinateSequence;
 
private:
 
    // Members
    std::unordered_map<Coordinate, OverlayEdge*, geom::Coordinate::HashCode> nodeMap;
    std::vector<OverlayEdge*> edges;
 
    // Locally store the OverlayEdge and OverlayLabel
    std::deque<OverlayEdge> ovEdgeQue;
    std::deque<OverlayLabel> ovLabelQue;
 
    std::vector<std::unique_ptr<const geom::CoordinateSequence>> csQue;
 
    // Methods
 
    OverlayEdge* createEdgePair(const CoordinateSequence* pts, OverlayLabel* lbl);
 
    OverlayEdge* createOverlayEdge(const CoordinateSequence* pts, OverlayLabel* lbl, bool direction);
 
    void insert(OverlayEdge* e);
 
 
 
public:
 
    OverlayGraph();
 
    OverlayGraph(const OverlayGraph& g) = delete;
    OverlayGraph& operator=(const OverlayGraph& g) = delete;
 
    OverlayEdge* addEdge(Edge* edge);
 
    std::vector<OverlayEdge*>& getEdges();
 
    std::vector<OverlayEdge*> getNodeEdges();
 
    OverlayEdge* getNodeEdge(const Coordinate& nodePt) const;
 
    std::vector<OverlayEdge*> getResultAreaEdges();
 
    OverlayLabel* createOverlayLabel(const Edge* edge);
 
    friend std::ostream& operator<<(std::ostream& os, const OverlayGraph& og);
 
};
 
 
} // namespace geos.operation.overlayng
} // namespace geos.operation
} // namespace geos