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# EdgeRing.h

    00001 /**********************************************************************
    00002  * $Id: EdgeRing.h 2557 2009-06-08 09:30:55Z strk $
    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
    00035 // Forward declarations
    00036 namespace geos {
    00037         namespace geom {
    00038                 class GeometryFactory;
    00039                 class LinearRing;
    00040                 class Polygon;
    00041                 class Coordinate;
    00042                 class CoordinateSequence;
    00043         }
    00044         namespace geomgraph {
    00045                 class DirectedEdge;
    00046                 //class Label;
    00047                 class Edge;
    00048         }
    00049 }
    00050
    00051 namespace geos {
    00052 namespace geomgraph { // geos.geomgraph
    00053
    00054 class GEOS_DLL EdgeRing {
    00055
    00056 public:
    00057         friend std::ostream& operator<< (std::ostream& os, const EdgeRing& er);
    00058
    00059         EdgeRing(DirectedEdge *newStart,
    00060                         const geom::GeometryFactory *newGeometryFactory);
    00061
    00062         virtual ~EdgeRing();
    00063
    00064         bool isIsolated();
    00065
    00066         bool isHole();
    00067
    00068         /*
    00069          * Return a pointer to the LinearRing owned by
    00070          * this object. Make a copy if you need it beyond
    00071          * this objects's lifetime.
    00072          */
    00073         geom::LinearRing* getLinearRing();
    00074
    00075         Label& getLabel();
    00076
    00077         bool isShell();
    00078
    00079         EdgeRing *getShell();
    00080
    00081         void setShell(EdgeRing *newShell);
    00082
    00083         void addHole(EdgeRing *edgeRing);
    00084
    00090         geom::Polygon* toPolygon(const geom::GeometryFactory* geometryFactory);
    00091
    00097         void computeRing();
    00098
    00099         virtual DirectedEdge* getNext(DirectedEdge *de)=0;
    00100
    00101         virtual void setEdgeRing(DirectedEdge *de, EdgeRing *er)=0;
    00102
    00106         std::vector<DirectedEdge*>& getEdges();
    00107
    00108         int getMaxNodeDegree();
    00109
    00110         void setInResult();
    00111
    00116         bool containsPoint(const geom::Coordinate& p);
    00117
    00118         void testInvariant()
    00119         {
    00120                 // pts are never NULL
    00121                 assert(pts);
    00122
    00123 #ifndef NDEBUG
    00124                 // If this is not an hole, check that
    00125                 // each hole is not null and
    00126                 // has 'this' as it's shell
    00127                 if ( ! shell )
    00128                 {
    00129                         for (std::vector<EdgeRing*>::const_iterator
    00130                                 it=holes.begin(), itEnd=holes.end();
    00131                                 it != itEnd;
    00132                                 ++it)
    00133                         {
    00134                                 EdgeRing* hole=*it;
    00135                                 assert(hole);
    00136                                 assert(hole->getShell()==this);
    00137                         }
    00138                 }
    00139 #endif // ndef NDEBUG
    00140         }
    00141
    00142 protected:
    00143
    00144         DirectedEdge *startDe; // the directed edge which starts the list of edges for this EdgeRing
    00145
    00146         const geom::GeometryFactory *geometryFactory;
    00147
    00149         void computePoints(DirectedEdge *newStart);
    00150
    00151         void mergeLabel(Label& deLabel);
    00152
    00165         void mergeLabel(Label& deLabel, int geomIndex);
    00166
    00167         void addPoints(Edge *edge, bool isForward, bool isFirstEdge);
    00168
    00170         std::vector<EdgeRing*> holes;
    00171
    00172 private:
    00173
    00174         int maxNodeDegree;
    00175
    00177         std::vector<DirectedEdge*> edges;
    00178
    00179         geom::CoordinateSequence* pts;
    00180
    00181         // label stores the locations of each geometry on the
    00182         // face surrounded by this ring
    00183         Label label;
    00184
    00185         geom::LinearRing *ring;  // the ring created for this EdgeRing
    00186
    00187         bool isHoleVar;
    00188
    00190         EdgeRing *shell;
    00191
    00192         void computeMaxNodeDegree();
    00193
    00194 };
    00195
    00196 std::ostream& operator<< (std::ostream& os, const EdgeRing& er);
    00197
    00198 } // namespace geos.geomgraph
    00199 } // namespace geos
    00200
    00201 //#ifdef GEOS_INLINE
    00202 //# include "geos/geomgraph/EdgeRing.inl"
    00203 //#endif
    00204
    00205 #endif // ifndef GEOS_GEOMGRAPH_EDGERING_H
    00206
    00207 /**********************************************************************
    00208  * $Log$
    00209  * Revision 1.9  2006/07/08 00:33:55  strk
    00210  *         * configure.in: incremented CAPI minor version, to avoid                        falling behind any future version from the 2.2. branch.
    00211  *         * source/geom/Geometry.cpp, source/geom/GeometryFactory.cpp,
    00212  *         source/geomgraph/EdgeRing.cpp,
    00213  *         source/headers/geos/geom/Geometry.h,
    00214  *         source/headers/geos/geom/GeometryFactory.h,
    00215  *         source/headers/geos/geom/GeometryFactory.inl,
    00216  *         source/headers/geos/geomgraph/EdgeRing.h:
    00217  *         updated doxygen comments (sync with JTS head).
    00218  *         * source/headers/geos/platform.h.in: include <inttypes.h>
    00219  *         rather then <stdint.h>
    00220  *
    00221  * Revision 1.8  2006/04/06 09:41:55  strk
    00222  * Added operator<<, added pts!=NULL assertion in testInvariant() function
    00223  *
    00224  * Revision 1.7  2006/04/05 18:28:42  strk
    00225  * Moved testInvariant() methods from private to public, added
    00226  * some comments about them.
    00227  *
    00228  * Revision 1.6  2006/03/29 13:53:59  strk
    00229  * EdgeRing equipped with Invariant testing function and lots of exceptional assertions. Removed useless heap allocations, and pointers usages.
    00230  *
    00231  * Revision 1.5  2006/03/27 16:02:34  strk
    00232  * Added INL file for MinimalEdgeRing, added many debugging blocks,
    00233  * fixed memory leak in ConnectedInteriorTester (bug #59)
    00234  *
    00235  * Revision 1.4  2006/03/24 09:52:41  strk
    00236  * USE_INLINE => GEOS_INLINE
    00237  *
    00238  * Revision 1.3  2006/03/20 12:32:57  strk
    00239  * Added note about responsibility of return from ::toPolygon
    00240  *
    00241  * Revision 1.2  2006/03/15 17:17:41  strk
    00242  * Added missing forward declarations
    00243  *
    00244  * Revision 1.1  2006/03/09 16:46:49  strk
    00245  * geos::geom namespace definition, first pass at headers split
    00246  *
    00247  **********************************************************************/
    00248