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/**********************************************************************
 * $Id: SegmentSetMutualIntersector.h 2194 2008-09-23 23:01:00Z mloskot $
 *
 * 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.
 *
 *
 **********************************************************************/

#ifndef GEOS_NODING_SEGMENTSETMUTUALINTERSECTOR_H
#define GEOS_NODING_SEGMENTSETMUTUALINTERSECTOR_H

#include <geos/noding/SegmentString.h>
#include <geos/noding/SegmentIntersector.h>

namespace geos {
namespace noding { // geos::noding

/** \brief
 * An intersector for the red-blue intersection problem.
 *
 * In this class of line arrangement problem,
 * two disjoint sets of linestrings are provided.
 * It is assumed that within
 * each set, no two linestrings intersect except possibly at their endpoints.
 * Implementations can take advantage of this fact to optimize processing.
 *
 * @author Martin Davis
 * @version 1.10
 */
class SegmentSetMutualIntersector
{
public:
	
    SegmentSetMutualIntersector()
        : segInt(0)
    {}

	virtual ~SegmentSetMutualIntersector() {}

	/**
	 * Sets the {@link SegmentIntersector} to use with this intersector.
	 * The SegmentIntersector will either rocord or add intersection nodes
	 * for the input segment strings.
	 *
	 * @param segInt the segment intersector to use
	 */
	void setSegmentIntersector(SegmentIntersector* si)
	{
		segInt = si;
	}

	/**
	 * 
	 * @param segStrings0 a collection of {@link SegmentString}s to node
	 */
	virtual void setBaseSegments(SegmentString::ConstVect* segStrings) = 0; 

	/**
	 * Computes the intersections for two collections of {@link SegmentString}s.
	 *
	 * @param segStrings1 a collection of {@link SegmentString}s to node
	 */
	virtual void process(SegmentString::ConstVect* segStrings) = 0;

protected:

    SegmentIntersector* segInt;

};

} // geos::noding
} // geos

#endif // GEOS_NODING_SEGMENTSETMUTUALINTERSECTOR_H
/**********************************************************************
 * $Log$
 **********************************************************************/