SweepLineIndex.h

00001 /**********************************************************************
00002  * $Id: SweepLineIndex.h 1820 2006-09-06 16:54:23Z 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 <vector>
00020 
00021 // Forward declarations
00022 namespace geos {
00023         namespace index { 
00024                 namespace sweepline {
00025                         class SweepLineInterval;
00026                         class SweepLineEvent;
00027                         class SweepLineOverlapAction;
00028                 }
00029         }
00030 }
00031 
00032 namespace geos {
00033 namespace index { // geos.index
00034 namespace sweepline { // geos:index:sweepline
00035 
00041 class SweepLineIndex {
00042 
00043 public:
00044 
00045         SweepLineIndex();
00046 
00047         ~SweepLineIndex();
00048 
00049         void add(SweepLineInterval *sweepInt);
00050 
00051         void computeOverlaps(SweepLineOverlapAction *action);
00052 
00053 private:
00054 
00055         // FIXME: make it a real vector rather then a pointer
00056         std::vector<SweepLineEvent*> events;
00057 
00058         bool indexBuilt;
00059 
00060         // statistics information
00061         int nOverlaps;
00062 
00068         void buildIndex();
00069 
00070         void processOverlaps(int start, int end,
00071                         SweepLineInterval *s0,
00072                         SweepLineOverlapAction *action);
00073 };
00074 
00075 
00076 } // namespace geos:index:sweepline
00077 } // namespace geos:index
00078 } // namespace geos
00079 
00080 #endif // GEOS_INDEX_SWEEPLINE_SWEEPLINEINDEX_H
00081 
00082 /**********************************************************************
00083  * $Log$
00084  * Revision 1.1  2006/03/21 10:01:30  strk
00085  * indexSweepline.h header split
00086  *
00087  **********************************************************************/
00088 

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