I have re-written large parts of it to be more robust in the special cases,
it still uses Mark's ideas of a plane trough the normal.
It will be included in the next release.
Wow! This is great news Dan! Very happy to hear those news! Such collaborations could be a superb contribution to Wings' further development! :- )
Thanks a lot Dan. I see that you did a lot of work on it.
One thing that would go well with this to allow for ... triangles, quads, pentagons, and hexagons (and such) ... would be maybe a "shortest path". We know that the code is only allowing for a straight-line cut at this time ... very trivial to add so that it can at least do a small polygon. You know ... code that can impose order on the selection.
That or change the selection pickers code to preserve "time" by way of making a singleton selection group with time-stamp key.