MonotoneChainOverlapAction.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2001-2002 Vivid Solutions 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: index/chain/MonotoneChainOverlapAction.java rev. 1.6 (JTS-1.10)
 *
 **********************************************************************/
 
#ifndef GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H
#define GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H
 
#include <geos/export.h>
#include <geos/geom/LineSegment.h>
#include <geos/geom/Envelope.h>
 
 
// Forward declarations
namespace geos {
        namespace index { 
                namespace chain { 
                        class MonotoneChain;
                }
        }
}
 
namespace geos {
namespace index { // geos::index
namespace chain { // geos::index::chain

class GEOS_DLL MonotoneChainOverlapAction {
 
protected:
 
        geom::LineSegment overlapSeg1;
 
        geom::LineSegment overlapSeg2;
 
public:
 
        MonotoneChainOverlapAction() {}
 
        virtual ~MonotoneChainOverlapAction() {}

        virtual void overlap(MonotoneChain& mc1, std::size_t start1,
                             MonotoneChain& mc2, std::size_t start2);

        virtual void overlap(const geom::LineSegment& /*seg1*/,
                             const geom::LineSegment& /*seg2*/)
        {}
 
        // these envelopes are used during the MonotoneChain search process
        geom::Envelope tempEnv1;
        geom::Envelope tempEnv2;
};
 
} // namespace geos::index::chain
} // namespace geos::index
} // namespace geos
 
#endif // GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H