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# EdgeRing.h

    00001 /**********************************************************************
    00002  * $Id: EdgeRing.h 3255 2011-03-01 17:56:10Z mloskot $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2005-2006 Refractions Research Inc.
    00008  * Copyright (C) 2001-2002 Vivid Solutions Inc.
    00009  *
    00010  * This is free software; you can redistribute and/or modify it under
    00011  * the terms of the GNU Lesser General Public Licence as published
    00012  * by the Free Software Foundation.
    00013  * See the COPYING file for more information.
    00014  *
    00015  **********************************************************************
    00016  *
    00017  * Last port: geomgraph/EdgeRing.java rev. 1.10 (JTS-1.10)
    00018  *
    00019  **********************************************************************/
    00020
    00021
    00022 #ifndef GEOS_GEOMGRAPH_EDGERING_H
    00023 #define GEOS_GEOMGRAPH_EDGERING_H
    00024
    00025 #include <geos/export.h>
    00026 #include <geos/geomgraph/Label.h> // for composition
    00027
    00028 #include <geos/inline.h>
    00029
    00030 #include <vector>
    00031 #include <cassert> // for testInvariant
    00032 #include <iosfwd> // for operator<<
    00033
    00034 #ifdef _MSC_VER
    00035 #pragma warning(push)
    00036 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
    00037 #endif
    00038
    00039 // Forward declarations
    00040 namespace geos {
    00041         namespace geom {
    00042                 class GeometryFactory;
    00043                 class LinearRing;
    00044                 class Polygon;
    00045                 class Coordinate;
    00046                 class CoordinateSequence;
    00047         }
    00048         namespace geomgraph {
    00049                 class DirectedEdge;
    00050                 //class Label;
    00051                 class Edge;
    00052         }
    00053 }
    00054
    00055 namespace geos {
    00056 namespace geomgraph { // geos.geomgraph
    00057
    00058 class GEOS_DLL EdgeRing {
    00059
    00060 public:
    00061         friend std::ostream& operator<< (std::ostream& os, const EdgeRing& er);
    00062
    00063         EdgeRing(DirectedEdge *newStart,
    00064                         const geom::GeometryFactory *newGeometryFactory);
    00065
    00066         virtual ~EdgeRing();
    00067
    00068         bool isIsolated();
    00069
    00070         bool isHole();
    00071
    00072         /*
    00073          * Return a pointer to the LinearRing owned by
    00074          * this object. Make a copy if you need it beyond
    00075          * this objects's lifetime.
    00076          */
    00077         geom::LinearRing* getLinearRing();
    00078
    00079         Label& getLabel();
    00080
    00081         bool isShell();
    00082
    00083         EdgeRing *getShell();
    00084
    00085         void setShell(EdgeRing *newShell);
    00086
    00087         void addHole(EdgeRing *edgeRing);
    00088
    00094         geom::Polygon* toPolygon(const geom::GeometryFactory* geometryFactory);
    00095
    00101         void computeRing();
    00102
    00103         virtual DirectedEdge* getNext(DirectedEdge *de)=0;
    00104
    00105         virtual void setEdgeRing(DirectedEdge *de, EdgeRing *er)=0;
    00106
    00110         std::vector<DirectedEdge*>& getEdges();
    00111
    00112         int getMaxNodeDegree();
    00113
    00114         void setInResult();
    00115
    00120         bool containsPoint(const geom::Coordinate& p);
    00121
    00122         void testInvariant()
    00123         {
    00124                 // pts are never NULL
    00125                 assert(pts);
    00126
    00127 #ifndef NDEBUG
    00128                 // If this is not an hole, check that
    00129                 // each hole is not null and
    00130                 // has 'this' as it's shell
    00131                 if ( ! shell )
    00132                 {
    00133                         for (std::vector<EdgeRing*>::const_iterator
    00134                                 it=holes.begin(), itEnd=holes.end();
    00135                                 it != itEnd;
    00136                                 ++it)
    00137                         {
    00138                                 EdgeRing* hole=*it;
    00139                                 assert(hole);
    00140                                 assert(hole->getShell()==this);
    00141                         }
    00142                 }
    00143 #endif // ndef NDEBUG
    00144         }
    00145
    00146 protected:
    00147
    00148         DirectedEdge *startDe; // the directed edge which starts the list of edges for this EdgeRing
    00149
    00150         const geom::GeometryFactory *geometryFactory;
    00151
    00153         void computePoints(DirectedEdge *newStart);
    00154
    00155         void mergeLabel(Label& deLabel);
    00156
    00169         void mergeLabel(Label& deLabel, int geomIndex);
    00170
    00171         void addPoints(Edge *edge, bool isForward, bool isFirstEdge);
    00172
    00174         std::vector<EdgeRing*> holes;
    00175
    00176 private:
    00177
    00178         int maxNodeDegree;
    00179
    00181         std::vector<DirectedEdge*> edges;
    00182
    00183         geom::CoordinateSequence* pts;
    00184
    00185         // label stores the locations of each geometry on the
    00186         // face surrounded by this ring
    00187         Label label;
    00188
    00189         geom::LinearRing *ring;  // the ring created for this EdgeRing
    00190
    00191         bool isHoleVar;
    00192
    00194         EdgeRing *shell;
    00195
    00196         void computeMaxNodeDegree();
    00197
    00198 };
    00199
    00200 std::ostream& operator<< (std::ostream& os, const EdgeRing& er);
    00201
    00202 } // namespace geos.geomgraph
    00203 } // namespace geos
    00204
    00205 #ifdef _MSC_VER
    00206 #pragma warning(pop)
    00207 #endif
    00208
    00209 //#ifdef GEOS_INLINE
    00210 //# include "geos/geomgraph/EdgeRing.inl"
    00211 //#endif
    00212
    00213 #endif // ifndef GEOS_GEOMGRAPH_EDGERING_H
    00214
    00215 /**********************************************************************
    00216  * $Log$
    00217  * Revision 1.9  2006/07/08 00:33:55  strk
    00218  *         * configure.in: incremented CAPI minor version, to avoid                        falling behind any future version from the 2.2. branch.
    00219  *         * source/geom/Geometry.cpp, source/geom/GeometryFactory.cpp,
    00220  *         source/geomgraph/EdgeRing.cpp,
    00221  *         source/headers/geos/geom/Geometry.h,
    00222  *         source/headers/geos/geom/GeometryFactory.h,
    00223  *         source/headers/geos/geom/GeometryFactory.inl,
    00224  *         source/headers/geos/geomgraph/EdgeRing.h:
    00225  *         updated doxygen comments (sync with JTS head).
    00226  *         * source/headers/geos/platform.h.in: include <inttypes.h>
    00227  *         rather then <stdint.h>
    00228  *
    00229  * Revision 1.8  2006/04/06 09:41:55  strk
    00230  * Added operator<<, added pts!=NULL assertion in testInvariant() function
    00231  *
    00232  * Revision 1.7  2006/04/05 18:28:42  strk
    00233  * Moved testInvariant() methods from private to public, added
    00234  * some comments about them.
    00235  *
    00236  * Revision 1.6  2006/03/29 13:53:59  strk
    00237  * EdgeRing equipped with Invariant testing function and lots of exceptional assertions. Removed useless heap allocations, and pointers usages.
    00238  *
    00239  * Revision 1.5  2006/03/27 16:02:34  strk
    00240  * Added INL file for MinimalEdgeRing, added many debugging blocks,
    00241  * fixed memory leak in ConnectedInteriorTester (bug #59)
    00242  *
    00243  * Revision 1.4  2006/03/24 09:52:41  strk
    00244  * USE_INLINE => GEOS_INLINE
    00245  *
    00246  * Revision 1.3  2006/03/20 12:32:57  strk
    00247  * Added note about responsibility of return from ::toPolygon
    00248  *
    00249  * Revision 1.2  2006/03/15 17:17:41  strk
    00250  * Added missing forward declarations
    00251  *
    00252  * Revision 1.1  2006/03/09 16:46:49  strk
    00253  * geos::geom namespace definition, first pass at headers split
    00254  *
    00255  **********************************************************************/
    00256