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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