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# LineMerger.h

    00001 /**********************************************************************
    00002  * $Id: LineMerger.h 3309 2011-04-27 15:47:14Z 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/linemerge/LineMerger.java r378 (JTS-1.12)
    00017  *
    00018  **********************************************************************/
    00019
    00020 #ifndef GEOS_OP_LINEMERGE_LINEMERGER_H
    00021 #define GEOS_OP_LINEMERGE_LINEMERGER_H
    00022
    00023 #include <geos/export.h>
    00024 #include <geos/operation/linemerge/LineMergeGraph.h> // for composition
    00025
    00026 #include <vector>
    00027
    00028 #ifdef _MSC_VER
    00029 #pragma warning(push)
    00030 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
    00031 #endif
    00032
    00033 // Forward declarations
    00034 namespace geos {
    00035         namespace geom {
    00036                 class LineString;
    00037                 class GeometryFactory;
    00038                 class Geometry;
    00039         }
    00040         namespace planargraph {
    00041                 class Node;
    00042         }
    00043         namespace operation {
    00044                 namespace linemerge {
    00045                         class EdgeString;
    00046                         class LineMergeDirectedEdge;
    00047                 }
    00048         }
    00049 }
    00050
    00051
    00052 namespace geos {
    00053 namespace operation { // geos::operation
    00054 namespace linemerge { // geos::operation::linemerge
    00055
    00076 class GEOS_DLL LineMerger {
    00077
    00078 private:
    00079
    00080         LineMergeGraph graph;
    00081
    00082         std::vector<geom::LineString*> *mergedLineStrings;
    00083
    00084         std::vector<EdgeString*> edgeStrings;
    00085
    00086         const geom::GeometryFactory *factory;
    00087
    00088         void merge();
    00089
    00090         void buildEdgeStringsForObviousStartNodes();
    00091
    00092         void buildEdgeStringsForIsolatedLoops();
    00093
    00094         void buildEdgeStringsForUnprocessedNodes();
    00095
    00096         void buildEdgeStringsForNonDegree2Nodes();
    00097
    00098         void buildEdgeStringsStartingAt(planargraph::Node *node);
    00099
    00100         EdgeString* buildEdgeStringStartingWith(LineMergeDirectedEdge *start);
    00101
    00102 public:
    00103         LineMerger();
    00104         ~LineMerger();
    00105
    00114         void add(std::vector<geom::Geometry*> *geometries);
    00115
    00124         void add(const geom::Geometry *geometry);
    00125
    00132         std::vector<geom::LineString*>* getMergedLineStrings();
    00133
    00134         void add(const geom::LineString *lineString);
    00135
    00136 };
    00137
    00138 } // namespace geos::operation::linemerge
    00139 } // namespace geos::operation
    00140 } // namespace geos
    00141
    00142 #ifdef _MSC_VER
    00143 #pragma warning(pop)
    00144 #endif
    00145
    00146 #endif // GEOS_OP_LINEMERGE_LINEMERGER_H
    00147
    00148 /**********************************************************************
    00149  * $Log$
    00150  * Revision 1.1  2006/03/22 10:13:53  strk
    00151  * opLinemerge.h split
    00152  *
    00153  **********************************************************************/