Models an OGC SFS LinearRing. A LinearRing is a LineString which is both closed and simple. More...

#include <LinearRing.h>

Inheritance diagram for geos::geom::LinearRing:

Public Member Functions
	LinearRing (const LinearRing &lr)

	LinearRing (CoordinateSequence::Ptr &&points, const GeometryFactory &newFactory)
	Constructs a LinearRing with the given points.

std::unique_ptr< LinearRing >	clone () const

int	getBoundaryDimension () const override
	Returns `Dimension.FALSE`, since by definition LinearRings do not have a boundary.

bool	isClosed () const override

std::string	getGeometryType () const override
	Return a string representation of this Geometry type.

GeometryTypeId	getGeometryTypeId () const override
	Return an integer representation of this Geometry type.

void	setPoints (const CoordinateSequence *cl)

std::unique_ptr< LinearRing >	reverse () const

void	orient (bool isCW)

Public Member Functions inherited from geos::geom::LineString
std::unique_ptr< LineString >	clone () const
	Creates and returns a full copy of this `LineString` object (including all coordinates contained by it)

std::string	getGeometryType () const override
	Return a string representation of this Geometry type.

GeometryTypeId	getGeometryTypeId () const override
	Return an integer representation of this Geometry type.

double	getLength () const override
	Returns the length of this Geometry.

bool	isCurved () const override

std::unique_ptr< LineString >	reverse () const

Static Public Attributes
static const unsigned int	MINIMUM_VALID_SIZE = 3
	The minimum number of vertices allowed in a valid non-empty ring. Empty rings with 0 vertices are also valid.

Protected Member Functions
int	getSortIndex () const override

LinearRing *	cloneImpl () const override
	Make a deep-copy of this Geometry.

LinearRing *	reverseImpl () const override
	Make a geometry with coordinates in reverse order.

Protected Member Functions inherited from geos::geom::LineString
	LineString (const LineString &ls)

	LineString (CoordinateSequence::Ptr &&pts, const GeometryFactory &newFactory)
	Constructs a LineString taking ownership the given CoordinateSequence.

LineString *	cloneImpl () const override
	Make a deep-copy of this Geometry.

LineString *	reverseImpl () const override
	Make a geometry with coordinates in reverse order.

int	getSortIndex () const override

void	geometryChangedAction () override
	Notifies this Geometry that its Coordinates have been changed by an external party.

Additional Inherited Members
Public Types inherited from geos::geom::LineString
typedef std::vector< const LineString * >	ConstVect
	A vector of const LineString pointers.

Detailed Description

Models an OGC SFS LinearRing. A LinearRing is a LineString which is both closed and simple.

In other words, the first and last coordinate in the ring must be equal, and the ring must not self-intersect. Either orientation of the ring is allowed.

A ring must have either 0 or 3 or more points. The first and last points must be equal (in 2D). If these conditions are not met, the constructors throw an geos::util::IllegalArgumentException A ring with 3 points is invalid, because it is collapsed and thus has a self-intersection. It is allowed to be constructed so that it can be represented, and repaired if needed.

Constructor & Destructor Documentation

◆ LinearRing()

geos::geom::LinearRing::LinearRing	(	CoordinateSequence::Ptr &&	points,
		const GeometryFactory &	newFactory
	)

Constructs a LinearRing with the given points.

Parameters

points	points forming a closed and simple linestring, or `null` or an empty array to create the empty geometry. This array must not contain `null` elements. If not null LinearRing will take ownership of points.
newFactory	the GeometryFactory used to create this geometry