RhinoCommon API
MeshSolidOrientation Method |
Determines orientation of a "solid" mesh.
Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll)

Return Value
Type: Int32+1 = mesh is solid with outward facing normals.
-1 = mesh is solid with inward facing normals.
0 = mesh is not solid.

Rhino for Mac
Supported in: 5.4Rhino for Windows
Supported in: 6.14