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SweepLineIndex.h

00001 /**********************************************************************
00002  * $Id: SweepLineIndex.h 3255 2011-03-01 17:56:10Z mloskot $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2006 Refractions Research 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 #ifndef GEOS_INDEX_SWEEPLINE_SWEEPLINEINDEX_H
00017 #define GEOS_INDEX_SWEEPLINE_SWEEPLINEINDEX_H
00018 
00019 #include <geos/export.h>
00020 
00021 #include <vector>
00022 
00023 #ifdef _MSC_VER
00024 #pragma warning(push)
00025 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
00026 #endif
00027 
00028 // Forward declarations
00029 namespace geos {
00030         namespace index { 
00031                 namespace sweepline {
00032                         class SweepLineInterval;
00033                         class SweepLineEvent;
00034                         class SweepLineOverlapAction;
00035                 }
00036         }
00037 }
00038 
00039 namespace geos {
00040 namespace index { // geos.index
00041 namespace sweepline { // geos:index:sweepline
00042 
00048 class GEOS_DLL SweepLineIndex {
00049 
00050 public:
00051 
00052         SweepLineIndex();
00053 
00054         ~SweepLineIndex();
00055 
00056         void add(SweepLineInterval *sweepInt);
00057 
00058         void computeOverlaps(SweepLineOverlapAction *action);
00059 
00060 private:
00061 
00062         // FIXME: make it a real vector rather then a pointer
00063         std::vector<SweepLineEvent*> events;
00064 
00065         bool indexBuilt;
00066 
00067         // statistics information
00068         int nOverlaps;
00069 
00075         void buildIndex();
00076 
00077         void processOverlaps(int start, int end,
00078                         SweepLineInterval *s0,
00079                         SweepLineOverlapAction *action);
00080 };
00081 
00082 } // namespace geos:index:sweepline
00083 } // namespace geos:index
00084 } // namespace geos
00085 
00086 #ifdef _MSC_VER
00087 #pragma warning(pop)
00088 #endif
00089 
00090 #endif // GEOS_INDEX_SWEEPLINE_SWEEPLINEINDEX_H
00091 
00092 /**********************************************************************
00093  * $Log$
00094  * Revision 1.1  2006/03/21 10:01:30  strk
00095  * indexSweepline.h header split
00096  *
00097  **********************************************************************/
00098 

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