HermiteSurface.VTangentAt Method

HermiteSurfaceVTangentAt Method

Get the "v" tangent direction (actually first derivative) to interpolate at the u,v parameter location.

Namespace:  Rhino.Geometry
Assembly:  RhinoCommon (in RhinoCommon.dll)
Since: 7.0
Syntax
Copy
public Vector3d VTangentAt(
	int uIndex,
	int vIndex
)
Public Function VTangentAt ( 
	uIndex As Integer,
	vIndex As Integer
) As Vector3d

Parameters

uIndex
Type: SystemInt32
The "u" index.
vIndex
Type: SystemInt32
The "v" index.

Return Value

Type: Vector3d
The tangent direction.
See Also

M:Rhino.Geometry.HermiteSurface.VTangentAt(System.Int32,System.Int32)