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MonotoneChain.h

00001 /**********************************************************************
00002  * $Id: MonotoneChain.h 2774 2009-12-03 19:36:56Z mloskot $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  **********************************************************************
00015  *
00016  * Last port: index/chain/MonotoneChain.java rev. 1.15 (JTS-1.10)
00017  *
00018  **********************************************************************/
00019 
00020 #ifndef GEOS_IDX_CHAIN_MONOTONECHAIN_H
00021 #define GEOS_IDX_CHAIN_MONOTONECHAIN_H
00022 
00023 #include <geos/export.h>
00024 #include <geos/geom/Envelope.h> // for inline
00025 
00026 #include <memory> // for auto_ptr
00027 
00028 // Forward declarations
00029 namespace geos {
00030         namespace geom {
00031                 class Envelope;
00032                 class LineSegment;
00033                 class CoordinateSequence;
00034         }
00035         namespace index { 
00036                 namespace chain { 
00037                         class MonotoneChainSelectAction;
00038                         class MonotoneChainOverlapAction;
00039                 }
00040         }
00041 }
00042 
00043 namespace geos {
00044 namespace index { // geos::index
00045 namespace chain { // geos::index::chain
00046 
00086 class GEOS_DLL MonotoneChain
00087 {
00088 public:
00089 
00100         MonotoneChain(const geom::CoordinateSequence& pts,
00101                   size_t start, size_t end, void* context);
00102 
00103         ~MonotoneChain();
00104 
00106         const geom::Envelope& getEnvelope() const;
00107 
00108         size_t getStartIndex() const { return start; }
00109 
00110         size_t getEndIndex() const { return end; }
00111 
00116         void getLineSegment(size_t index, geom::LineSegment& ls) const;
00117 
00123         std::auto_ptr<geom::CoordinateSequence> getCoordinates() const;
00124 
00129         void select(const geom::Envelope& searchEnv,
00130                         MonotoneChainSelectAction& mcs);
00131 
00132         void computeOverlaps(MonotoneChain *mc,
00133                         MonotoneChainOverlapAction *mco);
00134 
00135         void setId(int nId) { id=nId; }
00136 
00137         inline int getId() const { return id; }
00138 
00139         void* getContext() { return context; }
00140 
00141 private:
00142 
00143         void computeSelect(const geom::Envelope& searchEnv,
00144                         size_t start0,
00145                         size_t end0,
00146                         MonotoneChainSelectAction& mcs);
00147 
00148         void computeOverlaps(size_t start0, size_t end0, MonotoneChain& mc,
00149                              size_t start1, size_t end1,
00150                              MonotoneChainOverlapAction& mco);
00151 
00153         const geom::CoordinateSequence& pts;
00154 
00156         mutable geom::Envelope* env;
00157 
00159         void* context;
00160 
00162         size_t start;
00163 
00165         size_t end;
00166 
00168         int id;
00169 
00170     // Declare type as noncopyable
00171     MonotoneChain(const MonotoneChain& other);
00172     MonotoneChain& operator=(const MonotoneChain& rhs);
00173 };
00174 
00175 } // namespace geos::index::chain
00176 } // namespace geos::index
00177 } // namespace geos
00178 
00179 #endif // GEOS_IDX_CHAIN_MONOTONECHAIN_H
00180 
00181 /**********************************************************************
00182  * $Log$
00183  * Revision 1.1  2006/03/22 18:12:31  strk
00184  * indexChain.h header split.
00185  *
00186  **********************************************************************/
00187 

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