NurbsSurfacePointList.UVNDirectionsAt Method

NurbsSurfacePointListUVNDirectionsAt Method

Calculates the U, V, and N directions of a NURBS surface control point similar to the method used by Rhino's MoveUVN command.

Namespace:  Rhino.Geometry.Collections
Assembly:  RhinoCommon (in RhinoCommon.dll)
Since: 7.0
Syntax
Copy
public bool UVNDirectionsAt(
	int u,
	int v,
	out Vector3d uDir,
	out Vector3d vDir,
	out Vector3d nDir
)
Public Function UVNDirectionsAt ( 
	u As Integer,
	v As Integer,
	<OutAttribute> ByRef uDir As Vector3d,
	<OutAttribute> ByRef vDir As Vector3d,
	<OutAttribute> ByRef nDir As Vector3d
) As Boolean

Parameters

u
Type: SystemInt32
Index of control-point along surface U direction.
v
Type: SystemInt32
Index of control-point along surface V direction.
uDir
Type: Rhino.GeometryVector3d
The U direction.
vDir
Type: Rhino.GeometryVector3d
The V direction.
nDir
Type: Rhino.GeometryVector3d
The N direction.

Return Value

Type: Boolean
true if successful, false otherwise.
See Also

M:Rhino.Geometry.Collections.NurbsSurfacePointList.UVNDirectionsAt(System.Int32,System.Int32,Rhino.Geometry.Vector3d@,Rhino.Geometry.Vector3d@,Rhino.Geometry.Vector3d@)