6 Aug
2004
6 Aug
'04
7:34 p.m.
A rule which accomplishes this is: If the clockwise angle from the incoming vector to the outgoing vector is greater than 180%, use the outer angle bisector, else use the inner angle bisector. Incoming vectors are those which are closer to the start of the path.
I'm not sure I completely understand your intent. If I add mid-markers to the path in your example, they both look in one direction. I think this is both correct and logical, and Batik/Adobe render them exactly the same. So I don't think we need to change anything here.