Application: gvSIG desktop

/******************************************************************************

 * $Id: ogr_geometry.h 9167 2006-12-04 16:01:24Z  $

 *

 * Project:  OpenGIS Simple Features Reference Implementation

 * Purpose:  Classes for manipulating simple features that is not specific

 *           to a particular interface technology.

 * Author:   Frank Warmerdam, warmerda@home.com

 *

 ******************************************************************************

 * Copyright (c) 1999, Frank Warmerdam

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 ******************************************************************************

 *

 * $Log$

 * Revision 1.2.10.2  2006-11-15 00:08:29  jjdelcerro

 * *** empty log message ***

 *

 * Revision 1.3  2006/10/03 07:05:18  nacho

 * *** empty log message ***

 *

 * Revision 1.1  2006/07/18 16:21:00  nacho

 * *** empty log message ***

 *

 * Revision 1.1  2006/06/29 16:23:27  nacho

 * *** empty log message ***

 *

 * Revision 1.2  2006/01/09 12:50:13  nacho

 * *** empty log message ***

 *

 * Revision 1.1  2005/07/27 08:22:55  igbrotru

 * *** empty log message ***

 *

 * Revision 1.1  2005/01/11 15:23:01  igbrotru

 * *** empty log message ***

 *

 * Revision 1.50  2004/09/17 15:05:36  fwarmerdam

 * added get_Area() support

 *

 * Revision 1.49  2004/08/20 21:21:28  warmerda

 * added support for managing a persistent geos::GeometryFactory

 *

 * Revision 1.48  2004/07/10 04:54:23  warmerda

 * added GEOS methods, and closeRings

 *

 * Revision 1.47  2004/02/21 15:36:14  warmerda

 * const correctness updates for geometry: bug 289

 *

 * Revision 1.46  2003/09/11 22:47:54  aamici

 * add class constructors and destructors where needed in order to

 * let the mingw/cygwin binutils produce sensible partially linked objet files

 * with 'ld -r'.

 *

 * Revision 1.45  2003/08/27 15:40:37  warmerda

 * added support for generating DB2 V7.2 compatible WKB

 *

 * Revision 1.44  2003/05/28 19:16:42  warmerda

 * fixed up argument names and stuff for docs

 *

 * Revision 1.43  2003/04/28 15:39:33  warmerda

 * ryan added forceToMultiPolyline and forceToMultiPoint

 *

 * Revision 1.42  2003/03/06 20:29:27  warmerda

 * added GML import/export entry points

 *

 * Revision 1.41  2003/01/14 22:13:35  warmerda

 * added isClockwise() method on OGRLinearRing

 *

 * Revision 1.40  2003/01/08 22:04:11  warmerda

 * added forceToPolygon and forceToMultiPolygon methods

 *

 * Revision 1.39  2003/01/07 16:44:27  warmerda

 * added removeGeometry

 *

 * Revision 1.38  2003/01/02 21:45:23  warmerda

 * move OGRBuildPolygonsFromEdges into C API

 *

 * Revision 1.37  2002/10/25 15:20:50  warmerda

 * fixed MULTIPOINT WKT format

 *

 * Revision 1.36  2002/10/24 20:53:02  warmerda

 * expand tabs

 *

 * Revision 1.35  2002/09/26 18:13:17  warmerda

 * moved some defs to ogr_core.h for sharing with ogr_api.h

 *

 * Revision 1.34  2002/09/11 13:47:17  warmerda

 * preliminary set of fixes for 3D WKB enum

 *

 * Revision 1.33  2002/08/12 15:02:18  warmerda

 * added OGRRawPoint and OGREnvelope initializes

 *

 * Revision 1.32  2002/05/02 19:45:36  warmerda

 * added flattenTo2D() method

 *

 * Revision 1.31  2002/02/22 22:23:38  warmerda

 * added tolerances when assembling polygons

 *

 * Revision 1.30  2002/02/18 21:12:23  warmerda

 * added OGRBuildPolygonFromEdges

 *

 * Revision 1.29  2001/11/01 16:56:08  warmerda

 * added createGeometry and destroyGeometry methods

 *

 * Revision 1.28  2001/09/21 16:24:20  warmerda

 * added transform() and transformTo() methods

 *

 * Revision 1.27  2001/09/04 14:48:34  warmerda

 * added some more 2.5D geometry types

 *

 * Revision 1.26  2001/05/24 18:05:18  warmerda

 * substantial fixes to WKT support for MULTIPOINT/LINE/POLYGON

 *

 * Revision 1.25  2001/02/06 17:10:28  warmerda

 * export entry points from DLL

 *

 * Revision 1.24  2001/01/19 21:10:47  warmerda

 * replaced tabs

 *

 * Revision 1.23  2000/10/17 17:55:26  warmerda

 * added comments for byte orders

 *

 * Revision 1.22  2000/04/26 18:25:55  warmerda

 * added missing CPL_DLL attributes

 *

 * Revision 1.21  2000/03/14 21:38:17  warmerda

 * added method to translate geometrytype to name

 *

 * Revision 1.20  1999/11/18 19:02:20  warmerda

 * expanded tabs

 *

 * Revision 1.19  1999/11/04 16:26:12  warmerda

 * Added the addGeometryDirectly() method for containers.

 *

 * Revision 1.18  1999/09/22 13:19:09  warmerda

 * Added the addRingDirectly() method on OGRPolygon.

 *

 * Revision 1.17  1999/09/13 14:34:07  warmerda

 * updated to use wkbZ of 0x8000 instead of 0x80000000

 *

 * Revision 1.16  1999/09/13 02:27:32  warmerda

 * incorporated limited 2.5d support

 *

 * Revision 1.15  1999/08/29 17:14:29  warmerda

 * Added wkbNone.

 *

 * Revision 1.14  1999/07/27 00:48:11  warmerda

 * Added Equal() support

 *

 * Revision 1.13  1999/07/08 20:26:03  warmerda

 * No longer override getGeometryType() on OGRLinearRing.

 *

 * Revision 1.12  1999/07/07 04:23:07  danmo

 * Fixed typo in  #define _OGR_..._H_INCLUDED  line

 *

 * Revision 1.11  1999/07/06 21:36:46  warmerda

 * tenatively added getEnvelope() and Intersect()

 *

 * Revision 1.10  1999/06/25 20:44:42  warmerda

 * implemented assignSpatialReference, carry properly

 *

 * Revision 1.9  1999/05/31 20:44:11  warmerda

 * ogr_geometry.h

 *

 * Revision 1.8  1999/05/31 15:01:59  warmerda

 * OGRCurve now an abstract base class with essentially no implementation.

 * Everything moved down to OGRLineString where it belongs.  Also documented

 * classes.

 *

 * Revision 1.7  1999/05/31 11:05:08  warmerda

 * added some documentation

 *

 * Revision 1.6  1999/05/23 05:34:40  warmerda

 * added support for clone(), multipolygons and geometry collections

 *

 * Revision 1.5  1999/05/20 14:35:44  warmerda

 * added support for well known text format

 *

 * Revision 1.4  1999/05/17 14:39:13  warmerda

 * Added ICurve, and some other IGeometry and related methods.

 *

 * Revision 1.3  1999/05/14 13:30:59  warmerda

 * added IsEmpty() and IsSimple()

 *

 * Revision 1.2  1999/03/30 21:21:43  warmerda

 * added linearring/polygon support

 *

 * Revision 1.1  1999/03/29 21:21:10  warmerda

 * New

 *

 */

#ifndef _OGR_GEOMETRY_H_INCLUDED

#define _OGR_GEOMETRY_H_INCLUDED

#include "ogr_core.h"

#include "ogr_spatialref.h"

/**

 * \file ogr_geometry.h

 *

 * Simple feature geometry classes.

 */

/**

 * Simple container for a position.

 */

class OGRRawPoint

{

  public:

          OGRRawPoint()

          {

                  x = y = 0.0;

          }

    double      x;

    double      y;

};

namespace geos { 

    class Geometry;

    class GeometryFactory;

};

/************************************************************************/

/*                             OGRGeometry                              */

/************************************************************************/

/**

 * Abstract base class for all geometry classes.

 *

 * Note that the family of spatial analysis methods (Equal(), Disjoint(), ...,

 * ConvexHull(), Buffer(), ...) are not implemented at ths time.  Some other

 * required and optional geometry methods have also been omitted at this

 * time.

 */

class CPL_DLL OGRGeometry

{

  private:

    OGRSpatialReference * poSRS;                // may be NULL

  public:

                OGRGeometry();

    virtual     ~OGRGeometry();

    // standard IGeometry

    virtual int getDimension() const = 0;

    virtual int getCoordinateDimension() const = 0;

    virtual OGRBoolean  IsEmpty() const { return 0; } 

    virtual OGRBoolean  IsSimple() const { return 1; }

    virtual void        empty() = 0;

    virtual OGRGeometry *clone() const = 0;

    virtual void getEnvelope( OGREnvelope * psEnvelope ) const = 0;

    // IWks Interface

    virtual int WkbSize() const = 0;

    virtual OGRErr importFromWkb( unsigned char *, int=-1 )=0;

    virtual OGRErr exportToWkb( OGRwkbByteOrder, unsigned char * ) const = 0;

    virtual OGRErr importFromWkt( char ** ppszInput ) = 0;

    virtual OGRErr exportToWkt( char ** ppszDstText ) const = 0;

    // non-standard

    virtual OGRwkbGeometryType getGeometryType() const = 0;

    virtual const char *getGeometryName() const = 0;

    virtual void   dumpReadable( FILE *, const char * = NULL );

    virtual void   flattenTo2D() = 0;

    virtual char * exportToGML() const;

    virtual geos::Geometry *exportToGEOS() const;

    virtual void closeRings();

    void    assignSpatialReference( OGRSpatialReference * poSR );

    OGRSpatialReference *getSpatialReference( void ) const { return poSRS; }

    virtual OGRErr  transform( OGRCoordinateTransformation *poCT ) = 0;

    OGRErr  transformTo( OGRSpatialReference *poSR );

    // ISpatialRelation

    virtual OGRBoolean  Intersect( OGRGeometry * ) const;

    virtual OGRBoolean  Equal( OGRGeometry * ) const = 0;

    virtual OGRBoolean  Disjoint( const OGRGeometry * ) const;

    virtual OGRBoolean  Touches( const OGRGeometry * ) const;

    virtual OGRBoolean  Crosses( const OGRGeometry * ) const;

    virtual OGRBoolean  Within( const OGRGeometry * ) const;

    virtual OGRBoolean  Contains( const OGRGeometry * ) const;

    virtual OGRBoolean  Overlaps( const OGRGeometry * ) const;

//    virtual OGRBoolean  Relate( const OGRGeometry *, const char * ) const;

    virtual OGRGeometry *getBoundary() const;

    virtual double  Distance( const OGRGeometry * ) const;

    virtual OGRGeometry *ConvexHull() const;

    virtual OGRGeometry *Buffer( double dfDist, int nQuadSegs = 30 ) const;

    virtual OGRGeometry *Intersection( const OGRGeometry *) const;

    virtual OGRGeometry *Union( const OGRGeometry * ) const;

    virtual OGRGeometry *Difference( const OGRGeometry * ) const;

    virtual OGRGeometry *SymmetricDifference( const OGRGeometry * ) const;

    // Special HACK for DB2 7.2 support

    static int bGenerate_DB2_V72_BYTE_ORDER;

};

/************************************************************************/

/*                               OGRPoint                               */

/************************************************************************/

/**

 * Point class.

 *

 * Implements SFCOM IPoint methods.

 */

class CPL_DLL OGRPoint : public OGRGeometry

{

    double      x;

    double      y;

    double      z;

  public:

                OGRPoint();

                OGRPoint( double x, double y, double z = 0.0 );

    virtual     ~OGRPoint();

    // IWks Interface

    virtual int WkbSize() const;

    virtual OGRErr importFromWkb( unsigned char *, int=-1 );

    virtual OGRErr exportToWkb( OGRwkbByteOrder, unsigned char * ) const;

    virtual OGRErr importFromWkt( char ** );

    virtual OGRErr exportToWkt( char ** ppszDstText ) const;

    // IGeometry

    virtual int getDimension() const;

    virtual int getCoordinateDimension() const;

    virtual OGRGeometry *clone() const;

    virtual void empty();

    virtual void getEnvelope( OGREnvelope * psEnvelope ) const;

    // IPoint

    double      getX() const { return x; } 

    double      getY() const { return y; }

    double      getZ() const { return z; }

    // Non standard

    void        setX( double xIn ) { x = xIn; }

    void        setY( double yIn ) { y = yIn; }

    void        setZ( double zIn ) { z = zIn; }

    // ISpatialRelation

    virtual OGRBoolean  Equal( OGRGeometry * ) const;

    // Non standard from OGRGeometry

    virtual const char *getGeometryName() const;

    virtual OGRwkbGeometryType getGeometryType() const;

    virtual OGRErr  transform( OGRCoordinateTransformation *poCT );

    virtual void flattenTo2D();

};

/************************************************************************/

/*                               OGRCurve                               */

/************************************************************************/

/**

 * Abstract curve base class.

 */

class CPL_DLL OGRCurve : public OGRGeometry

{

  public:

            OGRCurve();

    virtual ~OGRCurve();

    // ICurve methods

    virtual double get_Length() const = 0;

    virtual void StartPoint(OGRPoint *) const = 0;

    virtual void EndPoint(OGRPoint *) const = 0;

    virtual int  get_IsClosed() const;

    virtual void Value( double, OGRPoint * ) const = 0;

};

/************************************************************************/

/*                            OGRLineString                             */

/************************************************************************/

/**

 * Concrete representation of a multi-vertex line.

 */

class CPL_DLL OGRLineString : public OGRCurve

{

  protected:

    int         nPointCount;

    OGRRawPoint *paoPoints;

    double      *padfZ;

    void        Make3D();

    void        Make2D();

  public:

                OGRLineString();

    virtual     ~OGRLineString();

    // IWks Interface

    virtual int WkbSize() const;

    virtual OGRErr importFromWkb( unsigned char *, int = -1 );

    virtual OGRErr exportToWkb( OGRwkbByteOrder, unsigned char * ) const;

    virtual OGRErr importFromWkt( char ** );

    virtual OGRErr exportToWkt( char ** ppszDstText ) const;

    // IGeometry interface

    virtual int getDimension() const;

    virtual int getCoordinateDimension() const;

    virtual OGRGeometry *clone() const;

    virtual void empty();

    virtual void getEnvelope( OGREnvelope * psEnvelope ) const;

    // ICurve methods

    virtual double get_Length() const;

    virtual void StartPoint(OGRPoint *) const;

    virtual void EndPoint(OGRPoint *) const;

    virtual void Value( double, OGRPoint * ) const;

    // ILineString methods

    int         getNumPoints() const { return nPointCount; }

    void        getPoint( int, OGRPoint * ) const;

    double      getX( int i ) const { return paoPoints[i].x; }

    double      getY( int i ) const { return paoPoints[i].y; }

    double      getZ( int i ) const;

    // ISpatialRelation

    virtual OGRBoolean  Equal( OGRGeometry * ) const;

    // non standard.

    void        setNumPoints( int );

    void        setPoint( int, OGRPoint * );

    void        setPoint( int, double, double, double = 0.0 );

    void        setPoints( int, OGRRawPoint *, double * = NULL );

    void        setPoints( int, double * padfX, double * padfY,

                           double *padfZ = NULL );

    void        addPoint( OGRPoint * );

    void        addPoint( double, double, double = 0.0 );

    // non-standard from OGRGeometry

    virtual OGRwkbGeometryType getGeometryType() const;

    virtual const char *getGeometryName() const;

    virtual OGRErr  transform( OGRCoordinateTransformation *poCT );

    virtual void flattenTo2D();

};

/************************************************************************/

/*                            OGRLinearRing                             */

/*                                                                      */

/*      This is an alias for OGRLineString for now.                     */

/************************************************************************/

/**

 * Concrete representation of a closed ring.

 *

 * This class is functionally equivelent to an OGRLineString, but has a

 * separate identity to maintain alignment with the OpenGIS simple feature

 * data model.  It exists to serve as a component of an OGRPolygon.

 */

class CPL_DLL OGRLinearRing : public OGRLineString

{

  private:

    friend class OGRPolygon; 

    // These are not IWks compatible ... just a convenience for OGRPolygon.

    virtual int _WkbSize( int b3D ) const;

    virtual OGRErr _importFromWkb( OGRwkbByteOrder, int b3D,

                                   unsigned char *, int=-1 );

    virtual OGRErr _exportToWkb( OGRwkbByteOrder, int b3D, 

                                 unsigned char * ) const;

  public:

                        OGRLinearRing();

                        OGRLinearRing( OGRLinearRing * );

                        ~OGRLinearRing();

    // Non standard.

    virtual const char *getGeometryName() const;

    virtual OGRGeometry *clone() const;

    virtual int isClockwise() const;

    virtual void closeRings();

    virtual double get_Area() const;

    // IWks Interface - Note this isnt really a first class object

    // for the purposes of WKB form.  These methods always fail since this

    // object cant be serialized on its own. 

    virtual int WkbSize() const;

    virtual OGRErr importFromWkb( unsigned char *, int=-1 );

    virtual OGRErr exportToWkb( OGRwkbByteOrder, unsigned char * ) const;

};

/************************************************************************/

/*                              OGRSurface                              */

/************************************************************************/

/**

 * Abstract base class for 2 dimensional objects like polygons.

 */

class CPL_DLL OGRSurface : public OGRGeometry

{

  public:

    virtual double      get_Area() const = 0;

    virtual OGRErr      Centroid( OGRPoint * poPoint ) const = 0;

    virtual OGRErr      PointOnSurface( OGRPoint * poPoint ) const = 0;

};

/************************************************************************/

/*                              OGRPolygon                              */

/************************************************************************/

/**

 * Concrete class representing polygons.

 *

 * Note that the OpenGIS simple features polygons consist of one outer

 * ring, and zero or more inner rings.  A polygon cannot represent disconnected

 * regions (such as multiple islands in a political body).  The

 * OGRMultiPolygon must be used for this.

 */

class CPL_DLL OGRPolygon : public OGRSurface

{

    int         nRingCount;

    OGRLinearRing **papoRings;

  public:

                OGRPolygon();

    virtual     ~OGRPolygon();

    // Non standard (OGRGeometry).

    virtual const char *getGeometryName() const;

    virtual OGRwkbGeometryType getGeometryType() const;

    virtual OGRGeometry *clone() const;

    virtual void empty();

    virtual OGRErr  transform( OGRCoordinateTransformation *poCT );

    virtual void flattenTo2D();

    // ISurface Interface

    virtual double      get_Area() const;

    virtual int         Centroid( OGRPoint * poPoint ) const;

    virtual int         PointOnSurface( OGRPoint * poPoint ) const;

    // IWks Interface

    virtual int WkbSize() const;

    virtual OGRErr importFromWkb( unsigned char *, int = -1 );

    virtual OGRErr exportToWkb( OGRwkbByteOrder, unsigned char * ) const;

    virtual OGRErr importFromWkt( char ** );

    virtual OGRErr exportToWkt( char ** ppszDstText ) const;

    // IGeometry

    virtual int getDimension() const;

    virtual int getCoordinateDimension() const;

    virtual void getEnvelope( OGREnvelope * psEnvelope ) const;

    // ISpatialRelation

    virtual OGRBoolean  Equal( OGRGeometry * ) const;

    // Non standard

    void        addRing( OGRLinearRing * );

    void        addRingDirectly( OGRLinearRing * );

    OGRLinearRing *getExteriorRing();

    const OGRLinearRing *getExteriorRing() const;

    int         getNumInteriorRings() const;

    OGRLinearRing *getInteriorRing( int );

    const OGRLinearRing *getInteriorRing( int ) const;

    virtual void closeRings();

};

/************************************************************************/

/*                        OGRGeometryCollection                         */

/************************************************************************/

/**

 * A collection of 1 or more geometry objects.

 *

 * All geometries must share a common spatial reference system, and

 * Subclasses may impose additional restrictions on the contents.

 */

class CPL_DLL OGRGeometryCollection : public OGRGeometry

{

    int         nGeomCount;

    OGRGeometry **papoGeoms;

    int         nCoordinateDimension;

  public:

                OGRGeometryCollection();

    virtual     ~OGRGeometryCollection();

    // Non standard (OGRGeometry).

    virtual const char *getGeometryName() const;

    virtual OGRwkbGeometryType getGeometryType() const;

    virtual OGRGeometry *clone() const;

    virtual void empty();

    virtual OGRErr  transform( OGRCoordinateTransformation *poCT );

    virtual void flattenTo2D();

    // IWks Interface

    virtual int WkbSize() const;

    virtual OGRErr importFromWkb( unsigned char *, int = -1 );

    virtual OGRErr exportToWkb( OGRwkbByteOrder, unsigned char * ) const;

    virtual OGRErr importFromWkt( char ** );

    virtual OGRErr exportToWkt( char ** ppszDstText ) const;

    // IGeometry methods

    virtual int getDimension() const;

    virtual int getCoordinateDimension() const;

    virtual void getEnvelope( OGREnvelope * psEnvelope ) const;

    // IGeometryCollection

    int         getNumGeometries() const;

    OGRGeometry *getGeometryRef( int );

    const OGRGeometry *getGeometryRef( int ) const;

    // ISpatialRelation

    virtual OGRBoolean  Equal( OGRGeometry * ) const;

    // Non standard

    virtual OGRErr addGeometry( const OGRGeometry * );

    virtual OGRErr addGeometryDirectly( OGRGeometry * );

    virtual OGRErr removeGeometry( int iIndex, int bDelete = TRUE );

    void closeRings();

};

/************************************************************************/

/*                           OGRMultiPolygon                            */

/************************************************************************/

/**

 * A collection of non-overlapping OGRPolygons.

 *

 * Note that the IMultiSurface class hasn't been modelled, nor have any

 * of it's methods. 

 */

class CPL_DLL OGRMultiPolygon : public OGRGeometryCollection

{

  public:

            OGRMultiPolygon();

    // Non standard (OGRGeometry).

    virtual const char *getGeometryName() const;

    virtual OGRwkbGeometryType getGeometryType() const;

    virtual OGRGeometry *clone() const;

    virtual OGRErr importFromWkt( char ** );

    virtual OGRErr exportToWkt( char ** ) const;

    // Non standard

    virtual OGRErr addGeometryDirectly( OGRGeometry * );

    double  get_Area() const;

};

/************************************************************************/

/*                            OGRMultiPoint                             */

/************************************************************************/

/**

 * A collection of OGRPoints.

 */

class CPL_DLL OGRMultiPoint : public OGRGeometryCollection

{

  private:

    OGRErr  importFromWkt_Bracketed( char ** );

  public:

            OGRMultiPoint();

    // Non standard (OGRGeometry).

    virtual const char *getGeometryName() const;

    virtual OGRwkbGeometryType getGeometryType() const;

    virtual OGRGeometry *clone() const;

    virtual OGRErr importFromWkt( char ** );

    virtual OGRErr exportToWkt( char ** ) const;

    // Non standard

    virtual OGRErr addGeometryDirectly( OGRGeometry * );

};

/************************************************************************/

/*                          OGRMultiLineString                          */

/************************************************************************/

/**

 * A collection of OGRLineStrings.

 */

class CPL_DLL OGRMultiLineString : public OGRGeometryCollection

{

  public:

            OGRMultiLineString();

            ~OGRMultiLineString();

    // Non standard (OGRGeometry).

    virtual const char *getGeometryName() const;

    virtual OGRwkbGeometryType getGeometryType() const;

    virtual OGRGeometry *clone() const;

    virtual OGRErr importFromWkt( char ** );

    virtual OGRErr exportToWkt( char ** ) const;

    // Non standard

    virtual OGRErr addGeometryDirectly( OGRGeometry * );

};

/************************************************************************/

/*                          OGRGeometryFactory                          */

/************************************************************************/

/**

 * Create geometry objects from well known text/binary.

 */

class CPL_DLL OGRGeometryFactory

{

  public:

    static OGRErr createFromWkb( unsigned char *, OGRSpatialReference *,

                                 OGRGeometry **, int = -1 );

    static OGRErr createFromWkt( char **, OGRSpatialReference *,

                                 OGRGeometry ** );

    static OGRGeometry *createFromGML( const char * );

    static OGRGeometry *createFromGEOS( const geos::Geometry * );

    static void   destroyGeometry( OGRGeometry * );

    static OGRGeometry *createGeometry( OGRwkbGeometryType );

    static OGRGeometry * forceToPolygon( OGRGeometry * );

    static OGRGeometry * forceToMultiPolygon( OGRGeometry * );

    static OGRGeometry * forceToMultiPoint( OGRGeometry * );

    static OGRGeometry * forceToMultiLineString( OGRGeometry * );

    static geos::GeometryFactory *getGEOSGeometryFactory();

};

#endif /* ndef _OGR_GEOMETRY_H_INCLUDED */