MonotoneChainSelectAction.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/MonotoneChainSelectAction.java rev. 1.6 (JTS-1.10)
 *
 **********************************************************************/
 
#ifndef GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H
#define GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H
 
#include <geos/export.h>
#include <geos/geom/LineSegment.h> // composition
#include <geos/geom/Envelope.h> // composition
 
 
// Forward declarations
namespace geos {
        namespace index { 
                namespace chain { 
                        class MonotoneChain;
                }
        }
}
 
namespace geos {
namespace index { // geos::index
namespace chain { // geos::index::chain

class GEOS_DLL MonotoneChainSelectAction {
 
protected:
 
        geom::LineSegment selectedSegment;
 
public:
 
        MonotoneChainSelectAction() {}
 
        virtual ~MonotoneChainSelectAction() {}

        virtual void select(MonotoneChain& mc, unsigned int start);

        virtual void select(const geom::LineSegment& seg) = 0;
 
        // these envelopes are used during the MonotoneChain search process
        // should only be visible by classes in this package
        geom::Envelope tempEnv1;
};
 
 
} // namespace geos::index::chain
} // namespace geos::index
} // namespace geos
 
#endif // GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H