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|
/******************************************************************************
* $Id: ogr_geometry.h 25450 2013-01-04 23:15:38Z rouault $
*
* Project: OpenGIS Simple Features Reference Implementation
* Purpose: Classes for manipulating simple features that is not specific
* to a particular interface technology.
* Author: Frank Warmerdam, warmerdam@pobox.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.
****************************************************************************/
#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;
};
typedef struct GEOSGeom_t *GEOSGeom;
/************************************************************************/
/* OGRGeometry */
/************************************************************************/
class OGRPoint;
/**
* Abstract base class for all geometry classes.
*
* Some spatial analysis methods require that OGR is built on the GEOS library
* to work properly. The precise meaning of methods that describe spatial relationships
* between geometries is described in the SFCOM, or other simple features interface
* specifications, like "OpenGIS® Implementation Specification for
* Geographic information - Simple feature access - Part 1: Common architecture"
* (<a href="http://www.opengeospatial.org/standards/sfa">OGC 06-103r3</a>)
*
*/
class CPL_DLL OGRGeometry
{
private:
OGRSpatialReference * poSRS; // may be NULL
protected:
int nCoordDimension;
public:
OGRGeometry();
virtual ~OGRGeometry();
// standard IGeometry
virtual int getDimension() const = 0;
virtual int getCoordinateDimension() const;
virtual OGRBoolean IsEmpty() const = 0;
virtual OGRBoolean IsValid() const;
virtual OGRBoolean IsSimple() const;
virtual OGRBoolean IsRing() const;
virtual void empty() = 0;
virtual OGRGeometry *clone() const = 0;
virtual void getEnvelope( OGREnvelope * psEnvelope ) const = 0;
virtual void getEnvelope( OGREnvelope3D * 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, char** papszOptions = NULL ) const;
virtual void flattenTo2D() = 0;
virtual char * exportToGML( const char* const * papszOptions = NULL ) const;
virtual char * exportToKML() const;
virtual char * exportToJson() const;
virtual GEOSGeom exportToGEOS() const;
virtual void closeRings();
virtual void setCoordinateDimension( int nDimension );
void assignSpatialReference( OGRSpatialReference * poSR );
OGRSpatialReference *getSpatialReference( void ) const { return poSRS; }
virtual OGRErr transform( OGRCoordinateTransformation *poCT ) = 0;
OGRErr transformTo( OGRSpatialReference *poSR );
virtual void segmentize(double dfMaxLength);
// ISpatialRelation
virtual OGRBoolean Intersects( OGRGeometry * ) const;
virtual OGRBoolean Equals( 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 *Boundary() 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 *UnionCascaded() const;
virtual OGRGeometry *Difference( const OGRGeometry * ) const;
virtual OGRGeometry *SymDifference( const OGRGeometry * ) const;
virtual OGRErr Centroid( OGRPoint * poPoint ) const;
virtual OGRGeometry *Simplify(double dTolerance) const;
OGRGeometry *SimplifyPreserveTopology(double dTolerance) const;
virtual OGRGeometry *Polygonize() const;
// backward compatibility to non-standard method names.
OGRBoolean Intersect( OGRGeometry * ) const CPL_WARN_DEPRECATED("Non standard method. Use Intersects() instead");
OGRBoolean Equal( OGRGeometry * ) const CPL_WARN_DEPRECATED("Non standard method. Use Equals() instead");
virtual OGRGeometry *SymmetricDifference( const OGRGeometry * ) const CPL_WARN_DEPRECATED("Non standard method. Use SymDifference() instead");
virtual OGRGeometry *getBoundary() const CPL_WARN_DEPRECATED("Non standard method. Use Boundary() instead");
// Special HACK for DB2 7.2 support
static int bGenerate_DB2_V72_BYTE_ORDER;
virtual void swapXY();
};
/************************************************************************/
/* 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 );
OGRPoint( double x, double y, double z );
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 OGRGeometry *clone() const;
virtual void empty();
virtual void getEnvelope( OGREnvelope * psEnvelope ) const;
virtual void getEnvelope( OGREnvelope3D * psEnvelope ) const;
virtual OGRBoolean IsEmpty() const;
// IPoint
double getX() const { return x; }
double getY() const { return y; }
double getZ() const { return z; }
// Non standard
virtual void setCoordinateDimension( int nDimension );
void setX( double xIn ) { x = xIn; if (nCoordDimension == 0) nCoordDimension = 2; }
void setY( double yIn ) { y = yIn; if (nCoordDimension == 0) nCoordDimension = 2; }
void setZ( double zIn ) { z = zIn; nCoordDimension=3; }
// ISpatialRelation
virtual OGRBoolean Equals( OGRGeometry * ) const;
// Non standard from OGRGeometry
virtual const char *getGeometryName() const;
virtual OGRwkbGeometryType getGeometryType() const;
virtual OGRErr transform( OGRCoordinateTransformation *poCT );
virtual void flattenTo2D();
virtual void swapXY();
};
/************************************************************************/
/* 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 OGRGeometry *clone() const;
virtual void empty();
virtual void getEnvelope( OGREnvelope * psEnvelope ) const;
virtual void getEnvelope( OGREnvelope3D * psEnvelope ) const;
virtual OGRBoolean IsEmpty() 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 Equals( OGRGeometry * ) const;
// non standard.
virtual void setCoordinateDimension( int nDimension );
void setNumPoints( int );
void setPoint( int, OGRPoint * );
void setPoint( int, double, double );
void setPoint( int, double, double, double );
void setPoints( int, OGRRawPoint *, double * = NULL );
void setPoints( int, double * padfX, double * padfY,
double *padfZ = NULL );
void addPoint( OGRPoint * );
void addPoint( double, double );
void addPoint( double, double, double );
void getPoints( OGRRawPoint *, double * = NULL ) const;
void getPoints( void* pabyX, int nXStride,
void* pabyY, int nYStride,
void* pabyZ = NULL, int nZStride = 0 ) const;
void addSubLineString( const OGRLineString *,
int nStartVertex = 0, int nEndVertex = -1 );
void reversePoints( void );
// non-standard from OGRGeometry
virtual OGRwkbGeometryType getGeometryType() const;
virtual const char *getGeometryName() const;
virtual OGRErr transform( OGRCoordinateTransformation *poCT );
virtual void flattenTo2D();
virtual void segmentize(double dfMaxLength);
virtual void swapXY();
};
/************************************************************************/
/* OGRLinearRing */
/************************************************************************/
/**
* 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.
*
* The OGRLinearRing has no corresponding free standing well known binary
* representation, so importFromWkb() and exportToWkb() will not actually
* work. There is a non-standard GDAL WKT representation though.
*
* Because OGRLinearRing is not a "proper" free standing simple features
* object, it cannot be directly used on a feature via SetGeometry(), and
* cannot genearally be used with GEOS for operations like Intersects().
* Instead the polygon should be used, or the OGRLinearRing should be
* converted to an OGRLineString for such operations.
*/
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 reverseWindingOrder();
virtual void closeRings();
virtual double get_Area() const;
OGRBoolean isPointInRing(const OGRPoint* pt, int bTestEnvelope = TRUE) const;
OGRBoolean isPointOnRingBoundary(const OGRPoint* pt, int bTestEnvelope = TRUE) 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 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();
virtual OGRBoolean IsEmpty() const;
virtual void segmentize(double dfMaxLength);
// ISurface Interface
virtual double get_Area() 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 void getEnvelope( OGREnvelope * psEnvelope ) const;
virtual void getEnvelope( OGREnvelope3D * psEnvelope ) const;
// ISpatialRelation
virtual OGRBoolean Equals( OGRGeometry * ) const;
// Non standard
virtual void setCoordinateDimension( int nDimension );
void addRing( OGRLinearRing * );
void addRingDirectly( OGRLinearRing * );
OGRLinearRing *getExteriorRing();
const OGRLinearRing *getExteriorRing() const;
int getNumInteriorRings() const;
OGRLinearRing *getInteriorRing( int );
const OGRLinearRing *getInteriorRing( int ) const;
OGRBoolean IsPointOnSurface( const OGRPoint * ) const;
virtual void closeRings();
virtual void swapXY();
};
/************************************************************************/
/* 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;
OGRErr importFromWkbInternal( unsigned char * pabyData, int nSize, int nRecLevel );
OGRErr importFromWktInternal( char **ppszInput, int nRecLevel );
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();
virtual OGRBoolean IsEmpty() const;
virtual void segmentize(double dfMaxLength);
// 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;
virtual double get_Length() const;
virtual double get_Area() const;
// IGeometry methods
virtual int getDimension() const;
virtual void getEnvelope( OGREnvelope * psEnvelope ) const;
virtual void getEnvelope( OGREnvelope3D * psEnvelope ) const;
// IGeometryCollection
int getNumGeometries() const;
OGRGeometry *getGeometryRef( int );
const OGRGeometry *getGeometryRef( int ) const;
// ISpatialRelation
virtual OGRBoolean Equals( OGRGeometry * ) const;
// Non standard
virtual void setCoordinateDimension( int nDimension );
virtual OGRErr addGeometry( const OGRGeometry * );
virtual OGRErr addGeometryDirectly( OGRGeometry * );
virtual OGRErr removeGeometry( int iIndex, int bDelete = TRUE );
void closeRings();
virtual void swapXY();
};
/************************************************************************/
/* 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;
// IGeometry methods
virtual int getDimension() const;
// Non standard
virtual OGRErr addGeometryDirectly( OGRGeometry * );
virtual double get_Area() const;
};
/************************************************************************/
/* OGRMultiPoint */
/************************************************************************/
/**
* A collection of OGRPoints.
*/
class CPL_DLL OGRMultiPoint : public OGRGeometryCollection
{
private:
OGRErr importFromWkt_Bracketed( char **, int bHasM, int bHasZ );
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;
// IGeometry methods
virtual int getDimension() 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;
// IGeometry methods
virtual int getDimension() const;
// Non standard
virtual OGRErr addGeometryDirectly( OGRGeometry * );
};
/************************************************************************/
/* OGRGeometryFactory */
/************************************************************************/
/**
* Create geometry objects from well known text/binary.
*/
class CPL_DLL OGRGeometryFactory
{
static OGRErr createFromFgfInternal( unsigned char *pabyData,
OGRSpatialReference * poSR,
OGRGeometry **ppoReturn,
int nBytes,
int *pnBytesConsumed,
int nRecLevel );
public:
static OGRErr createFromWkb( unsigned char *, OGRSpatialReference *,
OGRGeometry **, int = -1 );
static OGRErr createFromWkt( char **, OGRSpatialReference *,
OGRGeometry ** );
static OGRErr createFromFgf( unsigned char *, OGRSpatialReference *,
OGRGeometry **, int = -1, int * = NULL );
static OGRGeometry *createFromGML( const char * );
static OGRGeometry *createFromGEOS( GEOSGeom );
static void destroyGeometry( OGRGeometry * );
static OGRGeometry *createGeometry( OGRwkbGeometryType );
static OGRGeometry * forceToPolygon( OGRGeometry * );
static OGRGeometry * forceToLineString( OGRGeometry *, bool bOnlyInOrder = true );
static OGRGeometry * forceToMultiPolygon( OGRGeometry * );
static OGRGeometry * forceToMultiPoint( OGRGeometry * );
static OGRGeometry * forceToMultiLineString( OGRGeometry * );
static OGRGeometry * organizePolygons( OGRGeometry **papoPolygons,
int nPolygonCount,
int *pbResultValidGeometry,
const char **papszOptions = NULL);
static void *getGEOSGeometryFactory();
static int haveGEOS();
static OGRGeometry* transformWithOptions( const OGRGeometry* poSrcGeom,
OGRCoordinateTransformation *poCT,
char** papszOptions );
static OGRGeometry*
approximateArcAngles( double dfX, double dfY, double dfZ,
double dfPrimaryRadius, double dfSecondaryAxis,
double dfRotation,
double dfStartAngle, double dfEndAngle,
double dfMaxAngleStepSizeDegrees );
};
OGRwkbGeometryType CPL_DLL OGRFromOGCGeomType( const char *pszGeomType );
const char CPL_DLL * OGRToOGCGeomType( OGRwkbGeometryType eGeomType );
/* Prepared geometry API (needs GEOS >= 3.1.0) */
typedef struct _OGRPreparedGeometry OGRPreparedGeometry;
int OGRHasPreparedGeometrySupport();
OGRPreparedGeometry* OGRCreatePreparedGeometry( const OGRGeometry* poGeom );
void OGRDestroyPreparedGeometry( OGRPreparedGeometry* poPreparedGeom );
int OGRPreparedGeometryIntersects( const OGRPreparedGeometry* poPreparedGeom,
const OGRGeometry* poOtherGeom );
#endif /* ndef _OGR_GEOMETRY_H_INCLUDED */
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