I am a little confused about the use of AppendInnerLoop vs. AppendOuterLoop. Judging from the names you would think that to create a hatch with islands both methods are required. But to my, pleasant, surprise this is not the case. The attached Lisp results in a hatch object with islands although only (vla-appendouterloop) is used. Replacing that function with (vla-appendinnerloop) also work (the only difference I could find is a different value for group-code 92).
Can someone clarify the difference between the two methods? Is it perhaps wrong to only use (vla-appendouterloop) in the Lisp example?
Note: I use Bricscad.
