Mesh.NormalAt Method (Int32, Double, Double, Double, Double)

MeshNormalAt Method (Int32, Double, Double, Double, Double)

Evaluate a mesh normal at a set of barycentric coordinates. Barycentric coordinates must be assigned in accordance with the rules as defined by MeshPoint.T.

Namespace:  Rhino.Geometry
Assembly:  RhinoCommon (in RhinoCommon.dll)
Syntax
Copy
public Vector3d NormalAt(
	int faceIndex,
	double t0,
	double t1,
	double t2,
	double t3
)
Public Function NormalAt ( 
	faceIndex As Integer,
	t0 As Double,
	t1 As Double,
	t2 As Double,
	t3 As Double
) As Vector3d

Parameters

faceIndex
Type: SystemInt32
Index of triangle or quad to evaluate.
t0
Type: SystemDouble
First barycentric coordinate.
t1
Type: SystemDouble
Second barycentric coordinate.
t2
Type: SystemDouble
Third barycentric coordinate.
t3
Type: SystemDouble
Fourth barycentric coordinate. If the face is a triangle, this coordinate will be ignored.

Return Value

Type: Vector3d
A Normal vector to the mesh or Vector3d.Unset if the faceIndex is not valid or if the barycentric coordinates could not be evaluated.
Version Information

Rhino for Mac

Supported in: 5.4

Rhino for Windows

Supported in: 6.8
See Also

M:Rhino.Geometry.Mesh.NormalAt(System.Int32,System.Double,System.Double,System.Double,System.Double)