MonotoneChainBuilder.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/MonotoneChainBuilder.java r388 (JTS-1.12)
 *
 **********************************************************************/
 
#ifndef GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
#define GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
 
#include <geos/export.h>
#include <vector>
#include <cstddef>
 
// Forward declarations
namespace geos {
        namespace geom {
                class CoordinateSequence;
        }
        namespace index { 
                namespace chain { 
                        class MonotoneChain;
                }
        }
}
 
namespace geos {
namespace index { // geos::index
namespace chain { // geos::index::chain

class GEOS_DLL MonotoneChainBuilder {
 
public:
 
        MonotoneChainBuilder(){}

        static std::vector<MonotoneChain*>* getChains(
                        const geom::CoordinateSequence *pts,
                        void* context);

        static void getChains(const geom::CoordinateSequence *pts,
                        void* context,
                        std::vector<MonotoneChain*>& mcList);
 
        static std::vector<MonotoneChain*>* getChains(const geom::CoordinateSequence *pts)
        {
                return getChains(pts, NULL);
        }

        static void getChainStartIndices(const geom::CoordinateSequence& pts,
                        std::vector<std::size_t>& startIndexList);
 
private:

        static std::size_t findChainEnd(const geom::CoordinateSequence& pts,
                                                           std::size_t start);
};
 
} // namespace geos::index::chain
} // namespace geos::index
} // namespace geos
 
#endif // GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H