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PreparedLineStringIntersects.h

00001 /**********************************************************************
00002  * $Id: PreparedLineStringIntersects.h 2812 2009-12-08 17:42:59Z 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: geom/prep/PreparedLineStringIntersects.java rev 1.2 (JTS-1.10)
00018  *
00019  **********************************************************************/
00020 
00021 #ifndef GEOS_GEOM_PREP_PREPAREDLINESTRINGINTERSECTS_H
00022 #define GEOS_GEOM_PREP_PREPAREDLINESTRINGINTERSECTS_H
00023 
00024 #include <geos/geom/prep/PreparedLineString.h>
00025 #include <geos/algorithm/PointLocator.h> 
00026 #include <geos/geom/util/ComponentCoordinateExtracter.h> 
00027 #include <geos/geom/Coordinate.h> 
00028 #include <geos/noding/SegmentStringUtil.h>
00029 
00030 using namespace geos::algorithm;
00031 using namespace geos::geom::util;
00032 
00033 namespace geos {
00034 namespace geom { // geos::geom
00035 namespace prep { // geos::geom::prep
00036 
00048 class PreparedLineStringIntersects
00049 {
00050 public:
00051 
00060         static bool intersects(  PreparedLineString & prep, const geom::Geometry * geom ) 
00061         {
00062                 PreparedLineStringIntersects op( prep);
00063                 return op.intersects( geom);
00064         }
00065 
00069         PreparedLineStringIntersects(PreparedLineString & prep) 
00070                 : prepLine( prep)
00071         { }
00072 
00079         bool intersects(const geom::Geometry * g) const;
00080 
00081 protected:
00082         PreparedLineString & prepLine;
00083         //PreparedLineString * prepLine;
00084 
00093         bool isAnyTestPointInTarget(const geom::Geometry * testGeom) const;
00094         //{
00095         //      /**
00096         //       * This could be optimized by using the segment index on the lineal target.
00097         //       * However, it seems like the L/P case would be pretty rare in practice.
00098         //       */
00099         //      PointLocator * locator = new PointLocator();
00100 
00101         //      geom::Coordinate::ConstVect coords;
00102         //      ComponentCoordinateExtracter::getCoordinates( *testGeom, coords);
00103 
00104         //      for (size_t i=0, n=coords.size(); i<n; i++)
00105         //      {
00106         //              geom::Coordinate c = *(coords[i]);
00107         //              if ( locator->intersects( c, &(prepLine->getGeometry()) ))
00108         //                      return true;
00109         //      }
00110         //      return false;
00111         //}
00112 
00113     // Declare type as noncopyable
00114     PreparedLineStringIntersects(const PreparedLineStringIntersects& other);
00115     PreparedLineStringIntersects& operator=(const PreparedLineStringIntersects& rhs);
00116 };
00117 
00118 } // namespace geos::geom::prep
00119 } // namespace geos::geom
00120 } // namespace geos
00121 
00122 #endif // GEOS_GEOM_PREP_PREPAREDLINESTRINGINTERSECTS_H
00123 /**********************************************************************
00124  * $Log$
00125  **********************************************************************/
00126 

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