GEOS 3.2.2
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 #include <cstddef> 
00027 
00028 // Forward declarations
00029 namespace geos {
00030         namespace geom {
00031                 class Coordinate;
00032         }
00033 }
00034 
00035 namespace geos {
00036 namespace simplify { // geos::simplify
00037 
00038 using namespace std;
00039 
00044 class GEOS_DLL DouglasPeuckerLineSimplifier {
00045 
00046 public:
00047 
00048         typedef std::vector<short int> BoolVect;
00049         typedef std::auto_ptr<BoolVect> BoolVectAutoPtr;
00050 
00051         typedef std::vector<geom::Coordinate> CoordsVect;
00052         typedef std::auto_ptr<CoordsVect> CoordsVectAutoPtr;
00053 
00054 
00059         static CoordsVectAutoPtr simplify(
00060                         const CoordsVect& nPts,
00061                         double distanceTolerance);
00062 
00063         DouglasPeuckerLineSimplifier(const CoordsVect& nPts);
00064 
00073         void setDistanceTolerance(double nDistanceTolerance);
00074 
00079         CoordsVectAutoPtr simplify();
00080 
00081 private:
00082 
00083         const CoordsVect& pts;
00084         BoolVectAutoPtr usePt;
00085         double distanceTolerance;
00086 
00087         void simplifySection(size_t i, size_t j);
00088 
00089     // Declare type as noncopyable
00090     DouglasPeuckerLineSimplifier(const DouglasPeuckerLineSimplifier& other);
00091     DouglasPeuckerLineSimplifier& operator=(const DouglasPeuckerLineSimplifier& rhs);
00092 };
00093 
00094 } // namespace geos::simplify
00095 } // namespace geos
00096 
00097 #endif // GEOS_SIMPLIFY_DOUBGLASPEUCKERLINESIMPLIFIER_H
00098 
00099 /**********************************************************************
00100  * $Log$
00101  * Revision 1.4  2006/07/10 10:16:06  strk
00102  * changed vector<bool> to vector<short int> (see bug#101)
00103  *
00104  * Revision 1.3  2006/06/12 11:29:23  strk
00105  * unsigned int => size_t
00106  *
00107  * Revision 1.2  2006/04/13 10:39:12  strk
00108  * Initial implementation of TaggedLinesSimplifier class
00109  *
00110  * Revision 1.1  2006/04/03 10:16:11  strk
00111  * DouglasPeuckerLineSimplifier class port
00112  *
00113  **********************************************************************/