SegmentStringUtil.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 *
 **********************************************************************
 *
 * Last port: noding/SegmentStringUtil.java rev. 1.2 (JTS-1.9)
 *
 **********************************************************************/
 
#ifndef GEOS_NODING_SEGMENTSTRINGUTIL_H
#define GEOS_NODING_SEGMENTSTRINGUTIL_H
 
#include <geos/noding/NodedSegmentString.h>
#include <geos/geom/LineString.h>
#include <geos/geom/CoordinateSequence.h>
#include <geos/geom/util/LinearComponentExtracter.h>
 
namespace geos {
namespace noding { // geos::noding

class SegmentStringUtil
{
public:
        static void extractSegmentStrings(const geom::Geometry * g,
                                          SegmentString::ConstVect& segStr)
        {
                geom::LineString::ConstVect lines;
                geom::util::LinearComponentExtracter::getLines(*g, lines);
 
                for (std::size_t i=0, n=lines.size(); i<n; i++)
                {
                        geom::LineString* line = (geom::LineString*)(lines[i]);
 
                        // we take ownership of the coordinates here
                        // TODO: check if this can be optimized by getting
                        //       the internal CS.
                        geom::CoordinateSequence* pts = line->getCoordinates();
 
                        segStr.push_back(new NodedSegmentString(pts, g));
                }
        }
 
};
 
} // geos::noding
} // geos
 
#endif // GEOS_NODING_SEGMENTSTRINGUTIL_H