Normal of the surface.
Namespace:
Autodesk.Revit.DB
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Syntax
Remarks
This property is the "surface normal" vector. This is not necessarily the normal vector pointing out of the
solid that contains the face, to get that value use
ComputeNormal(UV)
.