Each brep loop has a defined type, e.g. outer, inner or point on surface.
RhinoCommon (in RhinoCommon.dll) Version: 5.1.50000.0 (5.0.20693.0)
Public Enumeration BrepLoopType
Unknown loop type.
2d loop curves form a simple closed curve with a counterclockwise orientation.
2d loop curves form a simple closed curve with a clockwise orientation.
Always closed - used internally during splitting operations.
"loop" is a curveonsrf made from a single (open or closed) trim that
has type TrimType.CurveOnSurface.
"loop" is a PointOnSurface made from a single trim that has