OGRCurve Class Reference

#include <ogr_geometry.h>

Inheritance diagram for OGRCurve:

List of all members.

Public Member Functions
virtual double	get_Length () const =0
	Returns the length of the curve.
virtual void	StartPoint (OGRPoint *) const =0
	Return the curve start point.
virtual void	EndPoint (OGRPoint *) const =0
	Return the curve end point.
virtual int	get_IsClosed () const
	Return TRUE if curve is closed.
virtual void	Value (double, OGRPoint *) const =0
	Fetch point at given distance along curve.

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Detailed Description

Abstract curve base class.

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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:

poPoint

the 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:

poPoint

the 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:

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

Implemented in OGRLineString.

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

• ogr_geometry.h
• ogrcurve.cpp