Andrew, Actually it looks like it is using two different approaches depending on whether we are dealing with quads or N-gons with more than 4 sides.
For quads it simply add 2 to the index. For N-gons it is looking for the most parallel non-adjacent edge. (using dot product and ignoring edges that are more than 30 degrees from parallel) -- Brent From: softimage-boun...@listproc.autodesk.com [mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Andrew Prostrelov Sent: 15 June 2017 07:24 To: Official Softimage Users Mailing List. https://groups.google.com/forum/#!forum/xsi_list <softimage@listproc.autodesk.com> Subject: Re: EdgeRing ALG for n-gons The friend of mine tried to move n-gon vertices and select edge ring from the same (1) > (2) edges. The result edge ring changes. So i suppose its not just an index calculation approach.
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