GEOS  3.3.9
MonotoneChainBuilder.h
00001 /**********************************************************************
00002  *
00003  * GEOS - Geometry Engine Open Source
00004  * http://geos.refractions.net
00005  *
00006  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00007  *
00008  * This is free software; you can redistribute and/or modify it under
00009  * the terms of the GNU Lesser General Public Licence as published
00010  * by the Free Software Foundation. 
00011  * See the COPYING file for more information.
00012  *
00013  **********************************************************************
00014  *
00015  * Last port: index/chain/MonotoneChainBuilder.java r388 (JTS-1.12)
00016  *
00017  **********************************************************************/
00018 
00019 #ifndef GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
00020 #define GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
00021 
00022 #include <geos/export.h>
00023 #include <vector>
00024 #include <cstddef>
00025 
00026 // Forward declarations
00027 namespace geos {
00028         namespace geom {
00029                 class CoordinateSequence;
00030         }
00031         namespace index { 
00032                 namespace chain { 
00033                         class MonotoneChain;
00034                 }
00035         }
00036 }
00037 
00038 namespace geos {
00039 namespace index { // geos::index
00040 namespace chain { // geos::index::chain
00041 
00048 class GEOS_DLL MonotoneChainBuilder {
00049 
00050 public:
00051 
00052         MonotoneChainBuilder(){}
00053 
00059         static std::vector<MonotoneChain*>* getChains(
00060                         const geom::CoordinateSequence *pts,
00061                         void* context);
00062 
00068         static void getChains(const geom::CoordinateSequence *pts,
00069                         void* context,
00070                         std::vector<MonotoneChain*>& mcList);
00071 
00072         static std::vector<MonotoneChain*>* getChains(const geom::CoordinateSequence *pts)
00073         {
00074                 return getChains(pts, NULL);
00075         }
00076 
00084         static void getChainStartIndices(const geom::CoordinateSequence& pts,
00085                         std::vector<std::size_t>& startIndexList);
00086 
00087 private:
00088 
00100         static std::size_t findChainEnd(const geom::CoordinateSequence& pts,
00101                                                            std::size_t start);
00102 };
00103 
00104 } // namespace geos::index::chain
00105 } // namespace geos::index
00106 } // namespace geos
00107 
00108 #endif // GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
00109