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# PrecisionModel.h

    00001 /**********************************************************************
    00002  * $Id: PrecisionModel.h 3292 2011-04-22 13:04:20Z strk $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2011 Sandro Santilli <strk@keybit.net>
    00008  * Copyright (C) 2006 Refractions Research Inc.
    00009  *
    00010  * This is free software; you can redistribute and/or modify it under
    00011  * the terms of the GNU Lesser General Public Licence as published
    00012  * by the Free Software Foundation.
    00013  * See the COPYING file for more information.
    00014  *
    00015  **********************************************************************
    00016  *
    00017  * Last port: geom/PrecisionModel.java r378 (JTS-1.12)
    00018  *
    00019  **********************************************************************/
    00020
    00021 #ifndef GEOS_GEOM_PRECISIONMODEL_H
    00022 #define GEOS_GEOM_PRECISIONMODEL_H
    00023
    00024 #include <geos/export.h>
    00025 #include <geos/inline.h>
    00026
    00027
    00028 #include <string>
    00029
    00030 // Forward declarations
    00031 namespace geos {
    00032         namespace io {
    00033                 class Unload;
    00034         }
    00035         namespace geom {
    00036                 class Coordinate;
    00037         }
    00038 }
    00039
    00040 namespace geos {
    00041 namespace geom { // geos::geom
    00042
    00088 class GEOS_DLL PrecisionModel {
    00089 friend class io::Unload;
    00090
    00091 public:
    00092
    00094         typedef enum {
    00095
    00102                 FIXED,
    00103
    00109                 FLOATING,
    00110
    00116                 FLOATING_SINGLE
    00117
    00118         } Type;
    00119
    00121         PrecisionModel(void);
    00122
    00124         //
    00129         PrecisionModel(Type nModelType);
    00130
    00147         PrecisionModel(double newScale, double newOffsetX, double newOffsetY);
    00148
    00160         PrecisionModel(double newScale);
    00161
    00162         // copy constructor
    00163         PrecisionModel(const PrecisionModel &pm);
    00164
    00166         ~PrecisionModel(void);
    00167
    00168
    00170         //
    00175         static const double maximumPreciseValue;
    00176
    00187         double makePrecise(double val) const;
    00188
    00190         void makePrecise(Coordinate& coord) const;
    00191
    00192         void makePrecise(Coordinate* coord) const;
    00193
    00195         //
    00199         bool isFloating() const;
    00200
    00204         //
    00211         int getMaximumSignificantDigits() const;
    00212
    00214         //
    00217         Type getType() const;
    00218
    00220         double getScale() const;
    00221
    00223         //
    00228         double getOffsetX() const;
    00229
    00231         //
    00236         double getOffsetY() const;
    00237
    00247         //void toInternal(const Coordinate& external, Coordinate* internal) const;
    00248
    00249         /*
    00250          *  Returns the precise representation of <code>external</code>.
    00251          *
    00252          *@param  external  the original coordinate
    00253          *@return
    00254          *      the coordinate whose values will be changed to the precise
    00255          *      representation of <code>external</code>
    00256          * @deprecated use makePrecise instead
    00257          */
    00258         //Coordinate* toInternal(const Coordinate& external) const;
    00259
    00260         /*
    00261          *  Returns the external representation of <code>internal</code>.
    00262          *
    00263          *@param  internal  the original coordinate
    00264          *@return           the coordinate whose values will be changed to the
    00265          *      external representation of <code>internal</code>
    00266          * @deprecated no longer needed, since internal representation is same as external representation
    00267          */
    00268         //Coordinate* toExternal(const Coordinate& internal) const;
    00269
    00270         /*
    00271          *  Sets <code>external</code> to the external representation of
    00272          *  <code>internal</code>.
    00273          *
    00274          * @param  internal  the original coordinate
    00275          * @param  external
    00276          *      the coordinate whose values will be changed to the
    00277          *      external representation of <code>internal</code>
    00278          * @deprecated no longer needed, since internal representation is same as external representation
    00279          */
    00280         //void toExternal(const Coordinate& internal, Coordinate* external) const;
    00281
    00282         std::string toString() const;
    00283
    00287         //
    00303         int compareTo(const PrecisionModel* other) const;
    00304
    00305 private:
    00306
    00314         void setScale(double newScale);
    00315                         // throw IllegalArgumentException
    00316
    00317         Type modelType;
    00318
    00319         double scale;
    00320
    00321 };
    00322
    00323 // Equality operator for PrecisionModel, deprecate it ?
    00324 //inline bool operator==(const PrecisionModel& a, const PrecisionModel& b);
    00325
    00326 } // namespace geos::geom
    00327 } // namespace geos
    00328
    00329 #ifdef GEOS_INLINE
    00330 # include "geos/geom/PrecisionModel.inl"
    00331 #endif
    00332
    00333 #endif // ndef GEOS_GEOM_PRECISIONMODEL_H
    00334
    00335 /**********************************************************************
    00336  * $Log$
    00337  * Revision 1.6  2006/04/06 12:34:07  strk
    00338  * Port info, more debugging lines, doxygen comments
    00339  *
    00340  * Revision 1.5  2006/04/03 14:07:32  strk
    00341  * Commented out obsoleted toInternal() method
    00342  *
    00343  * Revision 1.4  2006/03/28 08:57:37  strk
    00344  * Comments cleanup, system headers included after project headers
    00345  *
    00346  * Revision 1.3  2006/03/24 09:52:41  strk
    00347  * USE_INLINE => GEOS_INLINE
    00348  *
    00349  * Revision 1.2  2006/03/22 16:58:35  strk
    00350  * Removed (almost) all inclusions of geom.h.
    00351  * Removed obsoleted .cpp files.
    00352  * Fixed a bug in WKTReader not using the provided CoordinateSequence
    00353  * implementation, optimized out some memory allocations.
    00354  *
    00355  * Revision 1.1  2006/03/09 16:46:49  strk
    00356  * geos::geom namespace definition, first pass at headers split
    00357  *
    00358  **********************************************************************/