OGR
Public Member Functions | List of all members
OGRCurve Class Referenceabstract

#include <ogr_geometry.h>

Inheritance diagram for OGRCurve:
OGRGeometry OGRLineString OGRLinearRing

Public Member Functions

virtual double get_Length () const =0
 Returns the length of the curve. More...
 
virtual void StartPoint (OGRPoint *) const =0
 Return the curve start point. More...
 
virtual void EndPoint (OGRPoint *) const =0
 Return the curve end point. More...
 
virtual int get_IsClosed () const
 Return TRUE if curve is closed. More...
 
virtual void Value (double, OGRPoint *) const =0
 Fetch point at given distance along curve. More...
 
- Public Member Functions inherited from OGRGeometry
virtual int getDimension () const =0
 Get the dimension of this object. More...
 
virtual int getCoordinateDimension () const
 Get the dimension of the coordinates in this object. More...
 
virtual OGRBoolean IsEmpty () const =0
 Returns TRUE (non-zero) if the object has no points. More...
 
virtual OGRBoolean IsValid () const
 Test if the geometry is valid. More...
 
virtual OGRBoolean IsSimple () const
 Test if the geometry is simple. More...
 
virtual OGRBoolean IsRing () const
 Test if the geometry is a ring. More...
 
virtual void empty ()=0
 Clear geometry information. This restores the geometry to it's initial state after construction, and before assignment of actual geometry. More...
 
virtual OGRGeometryclone () const =0
 Make a copy of this object. More...
 
virtual void getEnvelope (OGREnvelope *psEnvelope) const =0
 Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure. More...
 
virtual void getEnvelope (OGREnvelope3D *psEnvelope) const =0
 Computes and returns the bounding envelope (3D) for this geometry in the passed psEnvelope structure. More...
 
virtual int WkbSize () const =0
 Returns size of related binary representation. More...
 
virtual OGRErr importFromWkb (unsigned char *, int=-1)=0
 Assign geometry from well known binary data. More...
 
virtual OGRErr exportToWkb (OGRwkbByteOrder, unsigned char *, OGRwkbVariant=wkbVariantOgc) const =0
 Convert a geometry into well known binary format. More...
 
virtual OGRErr importFromWkt (char **ppszInput)=0
 Assign geometry from well known text data. More...
 
virtual OGRErr exportToWkt (char **ppszDstText) const =0
 Convert a geometry into well known text format. More...
 
virtual OGRwkbGeometryType getGeometryType () const =0
 Fetch geometry type. More...
 
virtual const char * getGeometryName () const =0
 Fetch WKT name for geometry type. More...
 
virtual void dumpReadable (FILE *, const char *=NULL, char **papszOptions=NULL) const
 Dump geometry in well known text format to indicated output file. More...
 
virtual void flattenTo2D ()=0
 Convert geometry to strictly 2D. In a sense this converts all Z coordinates to 0.0. More...
 
virtual char * exportToGML (const char *const *papszOptions=NULL) const
 Convert a geometry into GML format. More...
 
virtual char * exportToKML () const
 Convert a geometry into KML format. More...
 
virtual char * exportToJson () const
 Convert a geometry into GeoJSON format. More...
 
virtual void closeRings ()
 Force rings to be closed. More...
 
virtual void setCoordinateDimension (int nDimension)
 Set the coordinate dimension. More...
 
void assignSpatialReference (OGRSpatialReference *poSR)
 Assign spatial reference to this object. More...
 
OGRSpatialReferencegetSpatialReference (void) const
 Returns spatial reference system for object. More...
 
virtual OGRErr transform (OGRCoordinateTransformation *poCT)=0
 Apply arbitrary coordinate transformation to geometry. More...
 
OGRErr transformTo (OGRSpatialReference *poSR)
 Transform geometry to new spatial reference system. More...
 
virtual void segmentize (double dfMaxLength)
 Modify the geometry such it has no segment longer then the given distance. More...
 
virtual OGRBoolean Intersects (OGRGeometry *) const
 Do these features intersect? More...
 
virtual OGRBoolean Equals (OGRGeometry *) const =0
 Returns TRUE if two geometries are equivalent. More...
 
virtual OGRBoolean Disjoint (const OGRGeometry *) const
 Test for disjointness. More...
 
virtual OGRBoolean Touches (const OGRGeometry *) const
 Test for touching. More...
 
virtual OGRBoolean Crosses (const OGRGeometry *) const
 Test for crossing. More...
 
virtual OGRBoolean Within (const OGRGeometry *) const
 Test for containment. More...
 
virtual OGRBoolean Contains (const OGRGeometry *) const
 Test for containment. More...
 
virtual OGRBoolean Overlaps (const OGRGeometry *) const
 Test for overlap. More...
 
virtual OGRGeometryBoundary () const
 Compute boundary. More...
 
virtual double Distance (const OGRGeometry *) const
 Compute distance between two geometries. More...
 
virtual OGRGeometryConvexHull () const
 Compute convex hull. More...
 
virtual OGRGeometryBuffer (double dfDist, int nQuadSegs=30) const
 Compute buffer of geometry. More...
 
virtual OGRGeometryIntersection (const OGRGeometry *) const
 Compute intersection. More...
 
virtual OGRGeometryUnion (const OGRGeometry *) const
 Compute union. More...
 
virtual OGRGeometryUnionCascaded () const
 Compute union using cascading. More...
 
virtual OGRGeometryDifference (const OGRGeometry *) const
 Compute difference. More...
 
virtual OGRGeometrySymDifference (const OGRGeometry *) const
 Compute symmetric difference. More...
 
virtual OGRErr Centroid (OGRPoint *poPoint) const
 Compute the geometry centroid. More...
 
virtual OGRGeometrySimplify (double dTolerance) const
 Simplify the geometry. More...
 
OGRGeometrySimplifyPreserveTopology (double dTolerance) const
 Simplify the geometry while preserving topology. More...
 
virtual OGRGeometryPolygonize () const
 Polygonizes a set of sparse edges. More...
 
virtual OGRGeometrySymmetricDifference (const OGRGeometry *) const CPL_WARN_DEPRECATED("Non standard method. Use SymDifference() instead")
 Compute symmetric difference (deprecated) More...
 
virtual OGRGeometrygetBoundary () const CPL_WARN_DEPRECATED("Non standard method. Use Boundary() instead")
 Compute boundary (deprecated) More...
 
virtual void swapXY ()
 Swap x and y coordinates. More...
 

Detailed Description

Abstract curve base class.

Member Function Documentation

void OGRCurve::EndPoint ( OGRPoint poPoint) const
pure virtual

Return the curve end point.

This method relates to the SF COM ICurve::get_EndPoint() method.

Parameters
poPointthe point to be assigned the end location.

Implemented in OGRLineString.

Referenced by get_IsClosed().

int OGRCurve::get_IsClosed ( ) const
virtual

Return TRUE if curve is closed.

Tests if a curve is closed. A curve is closed if its start point is equal to its end point.

This method relates to the SFCOM ICurve::get_IsClosed() method.

Returns
TRUE if closed, else FALSE.

References EndPoint(), OGRPoint::getX(), OGRPoint::getY(), and StartPoint().

double OGRCurve::get_Length ( ) const
pure virtual

Returns the length of the curve.

This method relates to the SFCOM ICurve::get_Length() method.

Returns
the length of the curve, zero if the curve hasn't been initialized.

Implemented in OGRLineString.

void OGRCurve::StartPoint ( OGRPoint poPoint) const
pure virtual

Return the curve start point.

This method relates to the SF COM ICurve::get_StartPoint() method.

Parameters
poPointthe point to be assigned the start location.

Implemented in OGRLineString.

Referenced by get_IsClosed().

void OGRCurve::Value ( double  dfDistance,
OGRPoint poPoint 
) const
pure virtual

Fetch point at given distance along curve.

This method relates to the SF COM ICurve::get_Value() method.

Parameters
dfDistancedistance along the curve at which to sample position. This distance should be between zero and get_Length() for this curve.
poPointthe point to be assigned the curve position.

Implemented in OGRLineString.


The documentation for this class was generated from the following files:

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