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IBezierCurve Interface (ArcObjects .NET 10.7 SDK)
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IBezierCurve Interface

Provides access to members that identify third degree bezier curve segments and defines their properties. Note: the IBezierCurve interface has been superseded by IBezierCurve2. Please consider using the more recent version.

Product Availability

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

Description

A Bezier Curve is a non-linear Segment defined by four control points.  The bezier curve starts at control point 0 and ends at control point 3.  Control points 0 and 1 define the tangent at the from point and control points 2 and 3 define the tangent at the to point.  The length of these tangent lines and position of the control points determines the shape of the created bezier curve.

When To Use

The IBezierCurve interface is used to define the properties/behavior of a Bezier Curve. For example, use the methods in this interface to put control points to define a Bezier Curve object or query an existing Bezier Curve object to get its four control points.


Members

Name Description
Read-only property Degree The degree of the Bezier curve. For third degree Beziers, this is always 3.
Read-only property Dimension The topological dimension of this geometry.
Read-only property Envelope Creates a copy of this geometry's envelope and returns it.
Read/write property FromPoint The 'from' point of the curve.
Read-only property GeometryType The type of this geometry.
Method GeoNormalize Shifts longitudes, if need be, into a continuous range of 360 degrees.
Method GeoNormalizeFromLongitude Normalizes longitudes into a continuous range containing the longitude. This method is obsolete.
Method GetSubcurve Extracts a portion of this curve into a new curve.
Read-only property IsClosed Indicates if 'from' and 'to' points (of each part) are identical.
Read-only property IsEmpty Indicates whether this geometry contains any points.
Read-only property Length The length of the curve.
Method Project Projects this geometry into a new spatial reference.
Method PutCoord Sets the specified (0 <= index < 4) control point of this Bezier curve.
Method PutCoords Sets this Bezier curve's control points from an array of between 1 to 4 input points.
Method PutWKSCoords Sets this Bezier curve's control points from the array of 4 input point structures.
Method QueryChordLengthTangentAtFrom Returns tangent vector at 'from' point, based on chord length parametrization; and whether it has been set by user or by smoothing process.
Method QueryChordLengthTangentAtTo Returns tangent vector at 'to' point, based on chord length parametrization; and whether it has been set by user or by smoothing process.
Method QueryCoord Copies the specified control point of this Bezier curve into the input point.
Method QueryCoords Copies this Bezier curve's control points into the array of 4 existing points.
Method QueryEnvelope Copies this geometry's envelope properties into the specified envelope.
Method QueryFromPoint Copies this curve's 'from' point to the input point.
Method QueryInflectionPoint Finds inflection point; sets it empty if none exists.
Method QueryNormal Constructs a line normal to a curve from a point at a specified distance along the curve.
Method QueryPoint Copies to outPoint the properties of a point on the curve at a specified distance from the beginning of the curve.
Method QueryPointAndDistance Finds the point on the curve closest to inPoint, then copies that point to outPoint; optionally calculates related items.
Method QueryTangent Constructs a line tangent to a curve from a point at a specified distance along the curve.
Method QueryToPoint Copies the curve's 'to' point into the input point.
Method QueryWKSCoords Copies this Bezier curve's control points into the array of 4 existing point structures.
Method ReverseOrientation Reverses the parameterization of the curve ('from' point becomes 'to' point, first segment becomes last segment, etc).
Method SetChordLengthTangentAtFrom Establishes tangent vector at 'from' point, based on chord length parametrization; and sets flag whether it has been set by user or by smoothing process.
Method SetChordLengthTangentAtTo Establishes tangent vector at 'to' point, based on chord length parametrization; and sets flag whether it has been set by user or by smoothing process.
Method SetEmpty Removes all points from this geometry.
Method SnapToSpatialReference Moves points of this geometry so that they can be represented in the precision of the geometry's associated spatial reference system.
Read/write property SpatialReference The spatial reference associated with this geometry.
Read/write property ToPoint The 'to' point of the curve.

Inherited Interfaces

Interfaces Description
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 IBezierCurve

Classes Description
BezierCurve A cubic Bezier curve defined between two points; optionally has measure, height and ID attributes at each endpoint.

Remarks

 

IBezierCurve Example

See Also

IPoint Interface | IGeometry Interface | ISegment Interface | IConstructBezierCurve Interface