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SweepLineIndex.h

00001 /**********************************************************************
00002  * $Id: SweepLineIndex.h 2556 2009-06-06 22:22:28Z strk $
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 // Forward declarations
00024 namespace geos {
00025         namespace index { 
00026                 namespace sweepline {
00027                         class SweepLineInterval;
00028                         class SweepLineEvent;
00029                         class SweepLineOverlapAction;
00030                 }
00031         }
00032 }
00033 
00034 namespace geos {
00035 namespace index { // geos.index
00036 namespace sweepline { // geos:index:sweepline
00037 
00043 class GEOS_DLL SweepLineIndex {
00044 
00045 public:
00046 
00047         SweepLineIndex();
00048 
00049         ~SweepLineIndex();
00050 
00051         void add(SweepLineInterval *sweepInt);
00052 
00053         void computeOverlaps(SweepLineOverlapAction *action);
00054 
00055 private:
00056 
00057         // FIXME: make it a real vector rather then a pointer
00058         std::vector<SweepLineEvent*> events;
00059 
00060         bool indexBuilt;
00061 
00062         // statistics information
00063         int nOverlaps;
00064 
00070         void buildIndex();
00071 
00072         void processOverlaps(int start, int end,
00073                         SweepLineInterval *s0,
00074                         SweepLineOverlapAction *action);
00075 };
00076 
00077 
00078 } // namespace geos:index:sweepline
00079 } // namespace geos:index
00080 } // namespace geos
00081 
00082 #endif // GEOS_INDEX_SWEEPLINE_SWEEPLINEINDEX_H
00083 
00084 /**********************************************************************
00085  * $Log$
00086  * Revision 1.1  2006/03/21 10:01:30  strk
00087  * indexSweepline.h header split
00088  *
00089  **********************************************************************/
00090 

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