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# DouglasPeuckerLineSimplifier.h

    00001 /**********************************************************************
    00002  * $Id: DouglasPeuckerLineSimplifier.h 2785 2009-12-03 19:55:11Z 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 Licence as published
    00011  * by the Free Software Foundation.
    00012  * See the COPYING file for more information.
    00013  *
    00014  **********************************************************************
    00015  *
    00016  * Last port: simplify/DouglasPeuckerLineSimplifier.java rev. 1.4
    00017  *
    00018  **********************************************************************/
    00019
    00020 #ifndef GEOS_SIMPLIFY_DOUBGLASPEUCKERLINESIMPLIFIER_H
    00021 #define GEOS_SIMPLIFY_DOUBGLASPEUCKERLINESIMPLIFIER_H
    00022
    00023 #include <geos/export.h>
    00024 #include <vector>
    00025 #include <memory> // for auto_ptr
    00026
    00027 // Forward declarations
    00028 namespace geos {
    00029         namespace geom {
    00030                 class Coordinate;
    00031         }
    00032 }
    00033
    00034 namespace geos {
    00035 namespace simplify { // geos::simplify
    00036
    00041 class GEOS_DLL DouglasPeuckerLineSimplifier {
    00042
    00043 public:
    00044
    00045         typedef std::vector<short int> BoolVect;
    00046         typedef std::auto_ptr<BoolVect> BoolVectAutoPtr;
    00047
    00048         typedef std::vector<geom::Coordinate> CoordsVect;
    00049         typedef std::auto_ptr<CoordsVect> CoordsVectAutoPtr;
    00050
    00051
    00056         static CoordsVectAutoPtr simplify(
    00057                         const CoordsVect& nPts,
    00058                         double distanceTolerance);
    00059
    00060         DouglasPeuckerLineSimplifier(const CoordsVect& nPts);
    00061
    00070         void setDistanceTolerance(double nDistanceTolerance);
    00071
    00076         CoordsVectAutoPtr simplify();
    00077
    00078 private:
    00079
    00080         const CoordsVect& pts;
    00081         BoolVectAutoPtr usePt;
    00082         double distanceTolerance;
    00083
    00084         void simplifySection(size_t i, size_t j);
    00085
    00086     // Declare type as noncopyable
    00087     DouglasPeuckerLineSimplifier(const DouglasPeuckerLineSimplifier& other);
    00088     DouglasPeuckerLineSimplifier& operator=(const DouglasPeuckerLineSimplifier& rhs);
    00089 };
    00090
    00091 } // namespace geos::simplify
    00092 } // namespace geos
    00093
    00094 #endif // GEOS_SIMPLIFY_DOUBGLASPEUCKERLINESIMPLIFIER_H
    00095
    00096 /**********************************************************************
    00097  * $Log$
    00098  * Revision 1.4  2006/07/10 10:16:06  strk
    00099  * changed vector<bool> to vector<short int> (see bug#101)
    00100  *
    00101  * Revision 1.3  2006/06/12 11:29:23  strk
    00102  * unsigned int => size_t
    00103  *
    00104  * Revision 1.2  2006/04/13 10:39:12  strk
    00105  * Initial implementation of TaggedLinesSimplifier class
    00106  *
    00107  * Revision 1.1  2006/04/03 10:16:11  strk
    00108  * DouglasPeuckerLineSimplifier class port
    00109  *
    00110  **********************************************************************/