ogr_geometry.h

在linux环境下

/******************************************************************************
 * $Id: ogr_geometry.h,v 1.44 2003/05/28 19:16:42 warmerda Exp $
 *
 * Project:  OpenGIS Simple Features Reference Implementation
 * Purpose:  Classes for manipulating simple features that is not specific
 *           to a particular interface technology.
 * Author:   Frank Warmerdam, [e-mail]
 *
 ******************************************************************************
 * 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: ogr_geometry.h,v $
 * 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;
};


/************************************************************************/
/*                             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() = 0;
    virtual int getCoordinateDimension() = 0;
    virtual OGRBoolean  IsEmpty() { return 0; } 
    virtual OGRBoolean  IsSimple() { return 1; }
    virtual void        empty() = 0;
    virtual OGRGeometry *clone() = 0;
    virtual void getEnvelope( OGREnvelope * psEnvelope ) = 0;

    // IWks Interface
    virtual int WkbSize() = 0;
    virtual OGRErr importFromWkb( unsigned char *, int=-1 )=0;
    virtual OGRErr exportToWkb( OGRwkbByteOrder, unsigned char * ) = 0;
    virtual OGRErr importFromWkt( char ** ppszInput ) = 0;
    virtual OGRErr exportToWkt( char ** ppszDstText ) = 0;
    
    // non-standard
    virtual OGRwkbGeometryType getGeometryType() = 0;
    virtual const char *getGeometryName() = 0;
    virtual void   dumpReadable( FILE *, const char * = NULL );
    virtual void   flattenTo2D() = 0;
    virtual char * exportToGML() const;

    void    assignSpatialReference( OGRSpatialReference * poSR );
    OGRSpatialReference *getSpatialReference( void ) { return poSRS; }

    virtual OGRErr  transform( OGRCoordinateTransformation *poCT ) = 0;
    OGRErr  transformTo( OGRSpatialReference *poSR );

    // ISpatialRelation
    virtual OGRBoolean  Intersect( OGRGeometry * );
    virtual OGRBoolean  Equal( OGRGeometry * ) = 0;
    
#ifdef notdef
    
    // I presume all these should be virtual?  How many
    // should be pure?
    OGRGeometry *getBoundary();

    OGRBoolean  Disjoint( OGRGeometry * );
    OGRBoolean  Touch( OGRGeometry * );
    OGRBoolean  Cross( OGRGeometry * );
    OGRBoolean  Within( OGRGeometry * );
    OGRBoolean  Contains( OGRGeometry * );
    OGRBoolean  Overlap( OGRGeometry * );
    OGRBoolean  Relate( OGRGeometry *, const char * );

    double      Distance( OGRGeometry * );
    OGRGeometry *Intersection(OGRGeometry *);
    OGRGeometry *Buffer( double );
    OGRGeometry *ConvexHull();
    OGRGeometry *Union( OGRGeometry * );
    OGRGeometry *Difference( OGRGeometry * );
    OGRGeometry *SymmetricDifference( OGRGeometry * );
#endif    
};

/************************************************************************/
/*                               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();
    virtual OGRErr importFromWkb( unsigned char *, int=-1 );
    virtual OGRErr exportToWkb( OGRwkbByteOrder, unsigned char * );
    virtual OGRErr importFromWkt( char ** );
    virtual OGRErr exportToWkt( char ** ppszDstText );
    
    // IGeometry
    virtual int getDimension();
    virtual int getCoordinateDimension();
    virtual OGRGeometry *clone();
    virtual void empty();
    virtual void getEnvelope( OGREnvelope * psEnvelope );

    // IPoint
    double      getX() { return x; }
    double      getY() { return y; }
    double      getZ() { 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 * );
    
    // Non standard from OGRGeometry
    virtual const char *getGeometryName();
    virtual OGRwkbGeometryType getGeometryType();
    virtual OGRErr  transform( OGRCoordinateTransformation *poCT );
    virtual void flattenTo2D();

};

/************************************************************************/
/*                               OGRCurve                               */
/************************************************************************/

/**
 * Abstract curve base class.
 */

class CPL_DLL OGRCurve : public OGRGeometry
{
  public:
    // ICurve methods
    virtual double get_Length() = 0;
    virtual void StartPoint(OGRPoint *) = 0;
    virtual void EndPoint(OGRPoint *) = 0;
    virtual int  get_IsClosed();
    virtual void Value( double, OGRPoint * ) = 0;