Provides access to members that extend the functionality of one dimensional curves.
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.
Members

Name 
Description 

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. 

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 This method is obsolete.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. 

IsClosed 
Indicates if 'from' and 'to' points (of each part) are identical. 

IsEmpty 
Indicates whether this geometry contains any points. 

Length 
The length of the curve. 

Project 
Projects this geometry into a new spatial reference. 

PutCoordsEx 
Sets this segment's endpoints to 'from' and 'to'. 

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. 

QueryPointsAndDistances 
Given an input point, calculates the minimum distance to the geometry and provides an enumerator over all closest points on the geometry, along with additional information. 

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. 

ReverseOrientation 
Reverses the parameterization of the curve ('from' point becomes 'to' point, first segment becomes last segment, etc). 

SetEmpty 
Removes all points from this geometry. 

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 
ICurve2 
Provides access to members that extend the functionality of one dimensional curves. 
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. 
Classes that implement ICurve3
Classes 
Description 
BezierCurve 
A cubic Bezier curve defined between two points; optionally has measure, height and ID attributes at each endpoint. 
CircularArc 
A portion of a circle that connects two points optionally has measure, height and ID attributes at each endpoint. 
EllipticArc 
A portion of the boundary of a 2D ellipse that connects two points; optionally has measure, height and ID attributes at each endpoint. 
Line 
A 2D straight line between a pair of 2D endpoints; can optionally have height, measure and ID attributes at each endpoint. 
Polyline 
An ordered collection of paths; optionally has measure, height and ID attributes. 