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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