ArcObjects Library Reference (Geometry)

IRing Interface

Provides access to members that identify a ring and define its behavior. Note: the IRing interface has been superseded byIRing2. Please consider using the more recent version.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Description

A Ring is a type of surface patch that defines a two dimensional area and can be used to construct a MultiPatch, defined by a collection of points forming a closed Path, such that the From and To points have the same coordinates. The front side is established by orienting its vertices clockwise.

Members

		Description
	Close	Makes sure that this ring is closed by adding a line segment between the ring's 'to' and 'from' points if necessary.
	Dimension	The topological dimension of this geometry.
	Envelope	Creates a copy of this geometry's envelope and returns it.
	FromPoint	The 'from' point of the curve.
	Generalize	Generalizes this path using the Douglas-Poiker algorithm.
	GeometryType	The type of this geometry.
	GeoNormalize	Shifts longitudes, if need be, into a continuous range of 360 degrees.
	GeoNormalizeFromLongitude	Normalizes longitudes into a continuous range containing the longitude. This method is obsolete.
	GetSubcurve	Extracts a portion of this curve into a new curve.
	GetSubcurveEx	Extracts a portion of this curve into a new curve. The interior of the new curve may contain the from/to point of the ring when useRingOrientation is true.
	IsClosed	Indicates if 'from' and 'to' points (of each part) are identical.
	IsEmpty	Indicates whether this geometry contains any points.
	IsExterior	Indicates if this ring can function as the exterior ring in a polygon (ring orientation is clockwise, area > 0).
	Length	The length of the curve.
	Project	Projects this geometry into a new spatial reference.
	QueryChordLengthTangents	Returns tangent vectors (relative to corresponding endpoint) at both sides of a Bezier end point; and whether they have been set by user or by smoothing process.
	QueryEnvelope	Copies this geometry's envelope properties into the specified envelope.
	QueryFromPoint	Copies this curve's 'from' point to the input point.
	QueryNormal	Constructs a line normal to a curve from a point at a specified distance along the curve.
	QueryPoint	Copies to outPoint the properties of a point on the curve at a specified distance from the beginning of the curve.
	QueryPointAndDistance	Finds the point on the curve closest to inPoint, then copies that point to outPoint; optionally calculates related items.
	QueryTangent	Constructs a line tangent to a curve from a point at a specified distance along the curve.
	QueryToPoint	Copies the curve's 'to' point into the input point.
	Reshape	Modifies this ring by replacing some of its segments with some segments from reshapeSource.
	ReverseOrientation	Reverses the parameterization of the curve ('from' point becomes 'to' point, first segment becomes last segment, etc).
	SetChordLengthTangents	Sets tangent vectors (relative to corresponding endpoint) at both sides of a Bezier end point; if either is Nothing, they will be set by smoothing process.
	SetEmpty	Removes all points from this geometry.
	Smooth	Converts this path into a smooth approximation of itself that contains only Bezier curve segments.
	SmoothLocal	Replaces up to four segments (two on each of the specified vertex index) with bezier curves.
	SnapToSpatialReference	Moves points of this geometry so that they can be represented in the precision of the geometry's associated spatial reference system.
	SpatialReference	The spatial reference associated with this geometry.
	ToPoint	The 'to' point of the curve.

Inherited Interfaces

Interfaces	Description
IPath	Provides access to members that identify a path and define its behavior.
ICurve	Provides access to properties and methods of all 1 dimensional curves (polylines, segments, boundaries of polygons, etc.).
IGeometry	Provides access to members that describe properties and behavior of all geometric objects.

CoClasses that implement IRing