[Gmsh] create points in gmsh from a file

[Geordie McBain]

2013/7/8  <thierry.hocquellet at cea.fr>:
> Hello everybody
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> I would like to create many points in gmsh.
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> Could you tell me if it’s possible to create points in gmsh from a input
> file.
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> In this file, there are x,y,z coordinates of each point. This file could be
> an excel file or a simple text file.
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> If it’s not possible, what is the best way to create many points in gmsh ?

As mentioned at http://www.geuz.org/pipermail/gmsh/2012/007206.html, I
don't think Gmsh has any such facility itself, but what works well is
using an AWK (or Python, Perl, ...) script to read the coordinates and
write the input .geo file.  I attach an example.  Run it in the shell
as follows.

   gawk -f polygon.awk rectangle.xy > rectangle.geo
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