PreparedLineStringIntersects.h

/**********************************************************************
 * $Id: PreparedLineStringIntersects.h 2418 2009-04-29 08:15:21Z strk $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * 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: geom/prep/PreparedLineStringIntersects.java rev 1.2 (JTS-1.10)
 *
 **********************************************************************/

#ifndef GEOS_GEOM_PREP_PREPAREDLINESTRINGINTERSECTS_H
#define GEOS_GEOM_PREP_PREPAREDLINESTRINGINTERSECTS_H

#include <geos/geom/prep/PreparedLineString.h>
#include <geos/algorithm/PointLocator.h> 
#include <geos/geom/util/ComponentCoordinateExtracter.h> 
#include <geos/geom/Coordinate.h> 
#include <geos/noding/SegmentStringUtil.h>

using namespace geos::algorithm;
using namespace geos::geom::util;

namespace geos {
namespace geom { // geos::geom
namespace prep { // geos::geom::prep

class PreparedLineStringIntersects
{
private:
protected:
        PreparedLineString & prepLine;
        //PreparedLineString * prepLine;

        bool isAnyTestPointInTarget(const geom::Geometry * testGeom) const;
        //{
        //      /**
        //       * This could be optimized by using the segment index on the lineal target.
        //       * However, it seems like the L/P case would be pretty rare in practice.
        //       */
        //      PointLocator * locator = new PointLocator();

        //      geom::Coordinate::ConstVect coords;
        //      ComponentCoordinateExtracter::getCoordinates( *testGeom, coords);

        //      for (size_t i=0, n=coords.size(); i<n; i++)
        //      {
        //              geom::Coordinate c = *(coords[i]);
        //              if ( locator->intersects( c, &(prepLine->getGeometry()) ))
        //                      return true;
        //      }
        //      return false;
        //}


public:

        static bool intersects(  PreparedLineString & prep, const geom::Geometry * geom ) 
        {
                PreparedLineStringIntersects * op = new PreparedLineStringIntersects( prep);
                return op->intersects( geom);
        }

        PreparedLineStringIntersects(PreparedLineString & prep) 
                : prepLine( prep)
        { }

        bool intersects(const geom::Geometry * g) const;

};



} // namespace geos::geom::prep
} // namespace geos::geom
} // namespace geos

#endif // GEOS_GEOM_PREP_PREPAREDLINESTRINGINTERSECTS_H
/**********************************************************************
 * $Log$
 **********************************************************************/

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