Feature Request: outer perimeter should prefer to end at a concave point

[triffid]

When drawing the outer perimeter, there will always be a slight imperfection where it finishes, and the nozzle goes to do infill or another layer or whatever.

It would be awesome if slic3r searched for concave points in the outer perimeter and had a preference for ending the perimeter there, so that eg when printing gears or stars, the imperfection will be hidden away in the bottom of a concave corner.

This should be a weighted preference rather than a hard rule. When you implement jitter and an object only has one concave point (eg chevron) then jitter should still be able to move the point around, possibly keeping it close to the concave point.

[brandonheller]

+1 This would be a great way to avoid the visible seams that like to show up on most models.

[alranel]

I implemented this one!