BufferSubgraph.h

Go to the documentation of this file.

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2006 Refractions Research 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: operation/buffer/BufferSubgraph.java r378 (JTS-1.12)
 *
 **********************************************************************/

#ifndef GEOS_OP_BUFFER_BUFFERSUBGRAPH_H
#define GEOS_OP_BUFFER_BUFFERSUBGRAPH_H

#include <geos/export.h>

#include <geos/operation/buffer/RightmostEdgeFinder.h> // for composition

#include <vector>
#include <set>

#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif

// Forward declarations
namespace geos {
namespace geom {
class Coordinate;
class Envelope;
}
namespace algorithm {
class CGAlgorithms;
}
namespace geomgraph {
class DirectedEdge;
class Node;
}
}

namespace geos {
namespace operation { // geos.operation
namespace buffer { // geos.operation.buffer

class GEOS_DLL BufferSubgraph {
private:
    RightmostEdgeFinder finder;

    std::vector<geomgraph::DirectedEdge*> dirEdgeList;

    std::vector<geomgraph::Node*> nodes;

    geom::Coordinate* rightMostCoord;

    geom::Envelope* env;

    void addReachable(geomgraph::Node* startNode);

    void add(geomgraph::Node* node, std::vector<geomgraph::Node*>* nodeStack);

    void clearVisitedEdges();

    // <FIX> MD - use iteration & queue rather than recursion, for speed and robustness
    void computeDepths(geomgraph::DirectedEdge* startEdge);

    void computeNodeDepth(geomgraph::Node* n);

    void copySymDepths(geomgraph::DirectedEdge* de);

    bool contains(std::set<geomgraph::Node*>& nodes, geomgraph::Node* node);

public:

    friend std::ostream& operator<< (std::ostream& os, const BufferSubgraph& bs);

    BufferSubgraph();

    ~BufferSubgraph();

    std::vector<geomgraph::DirectedEdge*>* getDirectedEdges();

    std::vector<geomgraph::Node*>* getNodes();

    geom::Coordinate* getRightmostCoordinate();

    void create(geomgraph::Node* node);

    void computeDepth(int outsideDepth);

    void findResultEdges();

    int compareTo(BufferSubgraph*);

    geom::Envelope* getEnvelope();
};

std::ostream& operator<< (std::ostream& os, const BufferSubgraph& bs);

// INLINES
inline geom::Coordinate*
BufferSubgraph::getRightmostCoordinate()
{
    return rightMostCoord;
}

inline std::vector<geomgraph::Node*>*
BufferSubgraph::getNodes()
{
    return &nodes;
}

inline std::vector<geomgraph::DirectedEdge*>*
BufferSubgraph::getDirectedEdges()
{
    return &dirEdgeList;
}

bool BufferSubgraphGT(BufferSubgraph* first, BufferSubgraph* second);

} // namespace geos::operation::buffer
} // namespace geos::operation
} // namespace geos

#ifdef _MSC_VER
#pragma warning(pop)
#endif

#endif // ndef GEOS_OP_BUFFER_BUFFERSUBGRAPH_H