The Loop type exposes the following members.
A list of the idices of the faces that were adjacent and onside to the straddle faces
The area of the loop
Negative loops must always be inside positive loops. This is a place to store all the pos/neg loop dependency.
Is the loop closed?
Is the loop positive - meaning does it enclose material versus representing a hole
The faces that were formed on-side for this loop. About 2/3 s of these faces should have one negligible adjacent face.
The length of the loop.
A list of the idices of the straddle faces
The vertices making up this loop