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SegmentStringUtil.h

00001 /**********************************************************************
00002  * $Id: SegmentStringUtil.h 2325 2009-04-08 13:02:06Z 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  *
00017  * Last port: noding/SegmentStringUtil.java rev. 1.2 (JTS-1.9)
00018  *
00019  **********************************************************************/
00020 
00021 #ifndef GEOS_NODING_SEGMENTSTRINGUTIL_H
00022 #define GEOS_NODING_SEGMENTSTRINGUTIL_H
00023 
00024 #include <geos/noding/NodedSegmentString.h>
00025 #include <geos/geom/LineString.h>
00026 #include <geos/geom/CoordinateSequence.h>
00027 #include <geos/geom/util/LinearComponentExtracter.h>
00028 
00029 namespace geos {
00030 namespace noding { // geos::noding
00031 
00038 class SegmentStringUtil
00039 {
00040 public:
00059         static void extractSegmentStrings(const geom::Geometry * g,
00060                                           SegmentString::ConstVect& segStr)
00061         {
00062                 geom::LineString::ConstVect lines;
00063                 geom::util::LinearComponentExtracter::getLines(*g, lines);
00064 
00065                 for (size_t i=0, n=lines.size(); i<n; i++)
00066                 {
00067                         geom::LineString* line = (geom::LineString*)(lines[i]);
00068 
00069                         // we take ownership of the coordinates here
00070                         // TODO: check if this can be optimized by getting
00071                         //       the internal CS.
00072                         geom::CoordinateSequence* pts = line->getCoordinates();
00073 
00074                         segStr.push_back(new NodedSegmentString(pts, g));
00075                 }
00076         }
00077 
00078 };
00079 
00080 } // geos::noding
00081 } // geos
00082 
00083 #endif // GEOS_NODING_SEGMENTSTRINGUTIL_H
00084 /**********************************************************************
00085  * $Log$
00086  **********************************************************************/
00087 

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