OverlayGraph.h

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/**********************************************************************
 *
 * 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/operation/overlayng/OverlayEdge.h>
#include <geos/operation/overlayng/OverlayLabel.h>
#include <geos/geom/CoordinateSequence.h>

#include <map>
#include <vector>
#include <deque>

// Forward declarations
namespace geos {
namespace geom {
class Coordinate;
}
namespace operation {
namespace overlayng {
class Edge;
}
}
}

namespace geos {      // geos.
namespace operation { // geos.operation
namespace overlayng { // geos.operation.overlayng

using namespace geos::geom;

class GEOS_DLL OverlayGraph {

private:

    // Members
    std::map<Coordinate, OverlayEdge*> 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