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EdgeRing.h

00001 /**********************************************************************
00002  * $Id: EdgeRing.h 2567 2009-06-08 16:58:42Z strk $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 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: operation/polygonize/EdgeRing.java rev. 1.8 (JTS-1.10)
00018  *
00019  **********************************************************************/
00020 
00021 
00022 #ifndef GEOS_OP_POLYGONIZE_EDGERING_H
00023 #define GEOS_OP_POLYGONIZE_EDGERING_H
00024 
00025 #include <geos/export.h>
00026 
00027 #include <vector>
00028 
00029 // Forward declarations
00030 namespace geos {
00031         namespace geom { 
00032                 class LineString;
00033                 class LinearRing;
00034                 class Polygon;
00035                 class CoordinateSequence;
00036                 class Geometry;
00037                 class GeometryFactory;
00038                 class Coordinate;
00039         }
00040         namespace planargraph { 
00041                 class DirectedEdge;
00042         }
00043 }
00044 
00045 namespace geos {
00046 namespace operation { // geos::operation
00047 namespace polygonize { // geos::operation::polygonize
00048 
00053 class GEOS_DLL EdgeRing {
00054 private:
00055         const geom::GeometryFactory *factory; 
00056         std::vector<const planargraph::DirectedEdge*> *deList;
00057 
00058         // cache the following data for efficiency
00059         geom::LinearRing *ring;
00060         geom::CoordinateSequence *ringPts;
00061         std::vector<geom::Geometry*> *holes;
00062 
00069         geom::CoordinateSequence* getCoordinates();
00070 
00071         static void addEdge(const geom::CoordinateSequence *coords,
00072                         bool isForward,
00073                         geom::CoordinateSequence *coordList);
00074 
00075 public:
00092         static EdgeRing* findEdgeRingContaining(
00093                         EdgeRing *testEr,
00094                         std::vector<EdgeRing*> *shellList);
00095 
00106         static const geom::Coordinate& ptNotInList(
00107                         const geom::CoordinateSequence *testPts,
00108                         const geom::CoordinateSequence *pts);
00109 
00118         static bool isInList(const geom::Coordinate &pt,
00119                         const geom::CoordinateSequence *pts);
00120 
00121         EdgeRing(const geom::GeometryFactory *newFactory);
00122 
00123         ~EdgeRing();
00124 
00130         void add(const planargraph::DirectedEdge *de);
00131 
00139         bool isHole();
00140 
00146         void addHole(geom::LinearRing *hole);
00147 
00156         geom::Polygon* getPolygon();
00157 
00162         bool isValid();
00163 
00172         geom::LineString* getLineString();
00173 
00181         geom::LinearRing* getRingInternal();
00182 
00190         geom::LinearRing* getRingOwnership();
00191 };
00192 
00193 } // namespace geos::operation::polygonize
00194 } // namespace geos::operation
00195 } // namespace geos
00196 
00197 #endif // GEOS_OP_POLYGONIZE_EDGERING_H
00198 
00199 /**********************************************************************
00200  * $Log$
00201  * Revision 1.2  2006/05/02 14:32:49  strk
00202  * Added port info for polygonize/EdgeRing class, polygonize/EdgeRing.h header
00203  * not installed.
00204  *
00205  * Revision 1.1  2006/03/22 11:19:06  strk
00206  * opPolygonize.h headers split.
00207  *
00208  **********************************************************************/

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