numeric
Details of which entity lugs are to be displayed when the member entity.lugs is set. Possible values of lug_style are:
0 - Show a lug at the mid-point of the vector.
1 - Show lugs at the start and finish points of the vector.
2 - Show lugs at the start, mid and finish points of the vector.
When a lug is picked interactively (via the luglock function) the possible values of the system numeric lug_index on a successful hit are:
0 - The mid-point of the vector.
1 - The start point of the vector.
2 - The finish point of the vector.
New vector primitives have a lug_style of 0.
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 Functions:  | 
 luglock (point)  | 
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 Identifiers:  | 
 lug_index (numeric)  |