SubgraphDepthLocater.h

/**********************************************************************
 *
 * 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/SubgraphDepthLocater.java r320 (JTS-1.12)
 *
 **********************************************************************/
 
#ifndef GEOS_OP_BUFFER_SUBGRAPHDEPTHLOCATER_H
#define GEOS_OP_BUFFER_SUBGRAPHDEPTHLOCATER_H
 
#include <geos/export.h>
 
#include <vector>
 
#include <geos/geom/LineSegment.h> // for composition
 
// Forward declarations
namespace geos {
        namespace geom {
                class Coordinate;
        }
        namespace geomgraph {
                class DirectedEdge;
        }
        namespace operation {
                namespace buffer {
                        class BufferSubgraph;
                        class DepthSegment;
                }
        }
}
 
namespace geos {
namespace operation { // geos.operation
namespace buffer { // geos.operation.buffer

class GEOS_DLL SubgraphDepthLocater {
 
public:
 
        SubgraphDepthLocater(std::vector<BufferSubgraph*> *newSubgraphs)
                :
                subgraphs(newSubgraphs)
        {}
 
        ~SubgraphDepthLocater() {}
 
        int getDepth(const geom::Coordinate &p);
 
private:
 
        std::vector<BufferSubgraph*> *subgraphs;
 
        geom::LineSegment seg;

        void findStabbedSegments(const geom::Coordinate &stabbingRayLeftPt,
                        std::vector<DepthSegment*>& stabbedSegments);

        void findStabbedSegments(const geom::Coordinate &stabbingRayLeftPt,
                        std::vector<geomgraph::DirectedEdge*> *dirEdges,
                        std::vector<DepthSegment*>& stabbedSegments);

        void findStabbedSegments(const geom::Coordinate &stabbingRayLeftPt,
                        geomgraph::DirectedEdge *dirEdge,
                        std::vector<DepthSegment*>& stabbedSegments);
 
};
 
 
} // namespace geos::operation::buffer
} // namespace geos::operation
} // namespace geos
 
#endif // ndef GEOS_OP_BUFFER_SUBGRAPHDEPTHLOCATER_H