[Gmsh] Identifying nodes on boundaries and their order

[Melanie Roberts]

Hi,

In order to use my gMSh generated mesh in another program I need to list, 
in order, the nodes that make up the various boundaries of the domain - is 
there a way to do this in gMSh?

as an example, I have the mesh

and want to be able to extract that one boundary segment is 1 - 8 - 2 -3, 
a second is 3-4-5, a third 5 - 6 - 7 and the final 7 - 9 - 1.  If I were 
to have a single list that loops around the entire shape I can manually 
split into the various segments without any problem.



I found this http://www.geuz.org/pipermail/gmsh/2014/009188.html in the 
archive - but I do not think this answer my problem

Thanks

Melanie
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