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# BufferSubgraph.h

    00001 /**********************************************************************
    00002  * $Id: BufferSubgraph.h 3301 2011-04-27 09:42:31Z strk $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2006 Refractions Research Inc.
    00008  *
    00009  * This is free software; you can redistribute and/or modify it under
    00010  * the terms of the GNU Lesser General Public Licence as published
    00011  * by the Free Software Foundation.
    00012  * See the COPYING file for more information.
    00013  *
    00014  **********************************************************************
    00015  *
    00016  * Last port: operation/buffer/BufferSubgraph.java r378 (JTS-1.12)
    00017  *
    00018  **********************************************************************/
    00019
    00020 #ifndef GEOS_OP_BUFFER_BUFFERSUBGRAPH_H
    00021 #define GEOS_OP_BUFFER_BUFFERSUBGRAPH_H
    00022
    00023 #include <geos/export.h>
    00024
    00025 #include <geos/operation/buffer/RightmostEdgeFinder.h> // for composition
    00026
    00027 #include <vector>
    00028 #include <set>
    00029
    00030 #ifdef _MSC_VER
    00031 #pragma warning(push)
    00032 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
    00033 #endif
    00034
    00035 // Forward declarations
    00036 namespace geos {
    00037         namespace geom {
    00038                 class Coordinate;
    00039                 class Envelope;
    00040         }
    00041         namespace algorithm {
    00042                 class CGAlgorithms;
    00043         }
    00044         namespace geomgraph {
    00045                 class DirectedEdge;
    00046                 class Node;
    00047         }
    00048 }
    00049
    00050 namespace geos {
    00051 namespace operation { // geos.operation
    00052 namespace buffer { // geos.operation.buffer
    00053
    00062 class GEOS_DLL BufferSubgraph {
    00063 private:
    00064         RightmostEdgeFinder finder;
    00065
    00066         std::vector<geomgraph::DirectedEdge*> dirEdgeList;
    00067
    00068         std::vector<geomgraph::Node*> nodes;
    00069
    00070         geom::Coordinate *rightMostCoord;
    00071
    00072         geom::Envelope *env;
    00073
    00081         void addReachable(geomgraph::Node *startNode);
    00082
    00084         //
    00088         void add(geomgraph::Node* node, std::vector<geomgraph::Node*>* nodeStack);
    00089
    00090         void clearVisitedEdges();
    00091
    00098         // <FIX> MD - use iteration & queue rather than recursion, for speed and robustness
    00099         void computeDepths(geomgraph::DirectedEdge *startEdge);
    00100
    00101         void computeNodeDepth(geomgraph::Node *n);
    00102
    00103         void copySymDepths(geomgraph::DirectedEdge *de);
    00104
    00105         bool contains(std::set<geomgraph::Node*>& nodes, geomgraph::Node *node);
    00106
    00107 public:
    00108
    00109         friend std::ostream& operator<< (std::ostream& os, const BufferSubgraph& bs);
    00110
    00111         BufferSubgraph();
    00112
    00113         ~BufferSubgraph();
    00114
    00115         std::vector<geomgraph::DirectedEdge*>* getDirectedEdges();
    00116
    00117         std::vector<geomgraph::Node*>* getNodes();
    00118
    00122         geom::Coordinate* getRightmostCoordinate();
    00123
    00132         void create(geomgraph::Node *node);
    00133
    00134         void computeDepth(int outsideDepth);
    00135
    00147         void findResultEdges();
    00148
    00163         int compareTo(BufferSubgraph *);
    00164
    00171         geom::Envelope *getEnvelope();
    00172 };
    00173
    00174 std::ostream& operator<< (std::ostream& os, const BufferSubgraph& bs);
    00175
    00176 // INLINES
    00177 inline geom::Coordinate*
    00178 BufferSubgraph::getRightmostCoordinate() {return rightMostCoord;}
    00179
    00180 inline std::vector<geomgraph::Node*>*
    00181 BufferSubgraph::getNodes() { return &nodes; }
    00182
    00183 inline std::vector<geomgraph::DirectedEdge*>*
    00184 BufferSubgraph::getDirectedEdges() {
    00185         return &dirEdgeList;
    00186 }
    00187
    00188 bool BufferSubgraphGT(BufferSubgraph *first, BufferSubgraph *second);
    00189
    00190 } // namespace geos::operation::buffer
    00191 } // namespace geos::operation
    00192 } // namespace geos
    00193
    00194 #ifdef _MSC_VER
    00195 #pragma warning(pop)
    00196 #endif
    00197
    00198 #endif // ndef GEOS_OP_BUFFER_BUFFERSUBGRAPH_H
    00199
    00200 /**********************************************************************
    00201  * $Log$
    00202  * Revision 1.3  2006/03/15 11:45:06  strk
    00203  * doxygen comments
    00204  *
    00205  * Revision 1.2  2006/03/14 14:16:52  strk
    00206  * operator<< for BufferSubgraph, more debugging calls
    00207  *
    00208  * Revision 1.1  2006/03/14 00:19:40  strk
    00209  * opBuffer.h split, streamlined headers in some (not all) files in operation/buffer/
    00210  *
    00211  **********************************************************************/
    00212