/usr/include/geos/geom/prep/PreparedLineStringIntersects.h is in libgeos-dev 3.2.2-3ubuntu1.
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* $Id: PreparedLineStringIntersects.h 2812 2009-12-08 17:42:59Z 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
/**
* \brief
* Computes the <tt>intersects</tt> spatial relationship predicate
* for a target {@link PreparedLineString} relative to all other
* {@link Geometry} classes.
*
* Uses short-circuit tests and indexing to improve performance.
*
* @author Martin Davis
*
*/
class PreparedLineStringIntersects
{
public:
/**
* Computes the intersects predicate between a {@link PreparedLineString}
* and a {@link Geometry}.
*
* @param prep the prepared linestring
* @param geom a test geometry
* @return true if the linestring intersects the geometry
*/
static bool intersects( PreparedLineString & prep, const geom::Geometry * geom )
{
PreparedLineStringIntersects op( prep);
return op.intersects( geom);
}
/**
* \todo FIXME - mloskot: Why not taking linestring through const reference?
*/
PreparedLineStringIntersects(PreparedLineString & prep)
: prepLine( prep)
{ }
/**
* Tests whether this geometry intersects a given geometry.
*
* @param geom the test geometry
* @return true if the test geometry intersects
*/
bool intersects(const geom::Geometry * g) const;
protected:
PreparedLineString & prepLine;
//PreparedLineString * prepLine;
/**
* Tests whether any representative point of the test Geometry intersects
* the target geometry.
* Only handles test geometries which are Puntal (dimension 0)
*
* @param geom a Puntal geometry to test
* @return true if any point of the argument intersects the prepared geometry
*/
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;
//}
// Declare type as noncopyable
PreparedLineStringIntersects(const PreparedLineStringIntersects& other);
PreparedLineStringIntersects& operator=(const PreparedLineStringIntersects& rhs);
};
} // namespace geos::geom::prep
} // namespace geos::geom
} // namespace geos
#endif // GEOS_GEOM_PREP_PREPAREDLINESTRINGINTERSECTS_H
/**********************************************************************
* $Log$
**********************************************************************/
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