Hi Pilou, no there isn't anything currently in place for that, by group selection, you would need to just draw a curve and snap on to those points and that should give you that desired result.
It's not really all that easy to automatically calculate ordered results from initially unorganized points like that, it looks like you may want what is called the "convex hull" of the points in that particular case there.
You may be able to find some utility programs to process the points here: http://www.qhull.org/ I think there's a command line program there that is able to process lists of points and output the convex hull or other kinds of results.
- Michael
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