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# LineString.h

    00001 /**********************************************************************
    00002  * $Id: LineString.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) 2001-2002 Vivid Solutions Inc.
    00008  * Copyright (C) 2005 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 #ifndef GEOS_GEOS_LINESTRING_H
    00018 #define GEOS_GEOS_LINESTRING_H
    00019
    00020 #include <geos/platform.h> // do we need this ?
    00021 #include <geos/geom/Geometry.h> // for inheritance
    00022 #include <geos/geom/CoordinateSequence.h> // for proper use of auto_ptr<>
    00023 #include <geos/geom/Envelope.h> // for proper use of auto_ptr<>
    00024 #include <geos/geom/Dimension.h> // for Dimension::DimensionType
    00025
    00026 #include <string>
    00027 #include <vector>
    00028 #include <memory> // for auto_ptr
    00029
    00030 #include <geos/inline.h>
    00031
    00032 namespace geos {
    00033         namespace geom {
    00034                 class Coordinate;
    00035                 class CoordinateArraySequence;
    00036         }
    00037 }
    00038
    00039 namespace geos {
    00040 namespace geom { // geos::geom
    00041
    00046 class LineString: public Geometry {
    00047
    00048 public:
    00049
    00050         friend class GeometryFactory;
    00051
    00053         typedef std::vector<const LineString *> ConstVect;
    00054
    00055         virtual ~LineString();
    00056
    00057         virtual Geometry *clone() const;
    00058
    00059         virtual CoordinateSequence* getCoordinates() const;
    00060
    00062         const CoordinateSequence* getCoordinatesRO() const;
    00063
    00064         virtual const Coordinate& getCoordinateN(int n) const;
    00065
    00067         virtual Dimension::DimensionType getDimension() const;
    00068
    00074         virtual int getBoundaryDimension() const;
    00075
    00081         virtual Geometry* getBoundary() const;
    00082
    00083         virtual bool isEmpty() const;
    00084
    00085         virtual size_t getNumPoints() const;
    00086
    00087         virtual Point* getPointN(size_t n) const;
    00088
    00093         virtual Point* getStartPoint() const;
    00094
    00099         virtual Point* getEndPoint() const;
    00100
    00101         virtual bool isClosed() const;
    00102
    00103         virtual bool isRing() const;
    00104
    00105         virtual std::string getGeometryType() const;
    00106
    00107         virtual GeometryTypeId getGeometryTypeId() const;
    00108
    00109         virtual bool isSimple() const;
    00110
    00111         virtual bool isCoordinate(Coordinate& pt) const;
    00112
    00113         virtual bool equalsExact(const Geometry *other, double tolerance=0)
    00114                 const;
    00115
    00116         virtual void apply_rw(const CoordinateFilter *filter);
    00117
    00118         virtual void apply_ro(CoordinateFilter *filter) const;
    00119
    00120         virtual void apply_rw(GeometryFilter *filter);
    00121
    00122         virtual void apply_ro(GeometryFilter *filter) const;
    00123
    00124         virtual void apply_rw(GeometryComponentFilter *filter);
    00125
    00126         virtual void apply_ro(GeometryComponentFilter *filter) const;
    00127
    00135         virtual void normalize();
    00136
    00137         //was protected
    00138         virtual int compareToSameClass(const Geometry *ls) const;
    00139
    00140         virtual const Coordinate* getCoordinate() const;
    00141
    00142         virtual double getLength() const;
    00143
    00150         LineString* reverse() const;
    00151
    00152 protected:
    00153
    00154         LineString(const LineString &ls);
    00155
    00159         LineString(CoordinateSequence *pts, const GeometryFactory *newFactory);
    00160
    00162         LineString(CoordinateSequence::AutoPtr pts,
    00163                         const GeometryFactory *newFactory);
    00164
    00165         Envelope::AutoPtr computeEnvelopeInternal() const;
    00166
    00167         CoordinateSequence::AutoPtr points;
    00168
    00169 private:
    00170
    00171         void validateConstruction();
    00172
    00173 };
    00174
    00175 struct LineStringLT {
    00176         bool operator()(const LineString *ls1, const LineString *ls2) const {
    00177                 return ls1->compareTo(ls2)<0;
    00178         }
    00179 };
    00180
    00181
    00182 inline Geometry*
    00183 LineString::clone() const {
    00184         return new LineString(*this);
    00185 }
    00186
    00187 } // namespace geos::geom
    00188 } // namespace geos
    00189
    00190 //#ifdef GEOS_INLINE
    00191 //# include "geos/geom/LineString.inl"
    00192 //#endif
    00193
    00194 #endif // ndef GEOS_GEOS_LINESTRING_H
    00195
    00196 /**********************************************************************
    00197  * $Log$
    00198  * Revision 1.10  2006/06/12 10:49:43  strk
    00199  * unsigned int => size_t
    00200  *
    00201  * Revision 1.9  2006/05/04 15:49:39  strk
    00202  * updated all Geometry::getDimension() methods to return Dimension::DimensionType (closes bug#93)
    00203  *
    00204  * Revision 1.8  2006/04/28 10:55:39  strk
    00205  * Geometry constructors made protected, to ensure all constructions use GeometryFactory,
    00206  * which has been made friend of all Geometry derivates. getNumPoints() changed to return
    00207  * size_t.
    00208  *
    00209  * Revision 1.7  2006/04/11 11:16:25  strk
    00210  * Added LineString and LinearRing constructors by auto_ptr
    00211  *
    00212  * Revision 1.6  2006/04/10 18:15:09  strk
    00213  * Changed Geometry::envelope member to be of type auto_ptr<Envelope>.
    00214  * Changed computeEnvelopeInternal() signater to return auto_ptr<Envelope>
    00215  *
    00216  * Revision 1.5  2006/04/10 17:35:44  strk
    00217  * Changed LineString::points and Point::coordinates to be wrapped
    00218  * in an auto_ptr<>. This should close bugs #86 and #89
    00219  *
    00220  * Revision 1.4  2006/04/05 10:25:21  strk
    00221  * Fixed LineString constructor to ensure deletion of CoordinateSequence
    00222  * argument on exception throw
    00223  *
    00224  * Revision 1.3  2006/03/31 16:55:17  strk
    00225  * Added many assertions checking in LineString implementation.
    00226  * Changed ::getCoordinate() to return NULL on empty geom.
    00227  * Changed ::get{Start,End}Point() to return NULL on empty geom.
    00228  *
    00229  * Revision 1.2  2006/03/24 09:52:41  strk
    00230  * USE_INLINE => GEOS_INLINE
    00231  *
    00232  * Revision 1.1  2006/03/09 16:46:49  strk
    00233  * geos::geom namespace definition, first pass at headers split
    00234  *
    00235  **********************************************************************/