An integer parameter for controlling which lines are drawn on a moulding profile, by type.
Deployed by MouldingSegment. Depending on the moulding type, lines (LIN_) are placed thru different points.
Values:
1 (typ of crowns) top-front, bottom-back
2 (typ of base, shoe) top-back, bottom-front
3 (typ of caps) top-back
4 (typ of casings) top-back, bottom-back
MouldingAssembly passes the parameter blindly (without affecting it).
The moulding tools (Crown, Rake, Base) set the value of lineSet when calling MouldingAssembly.