> Does gmsh script support custom functions? I cannot find any guides to
> writing custom functions in gmsh manual
Not really, no. There is 'Macro' (which I think used to be called 'Function'),
but no.
http://gmsh.info/dev/doc/texinfo/gmsh.html#User_002ddefined-macros
But there is the Gmsh API which can be used instead of writing a GEO file
http://gmsh.info/dev/doc/texinfo/gmsh.html#Gmsh-API
Before that came along, the best approach was generating the GEO file in an
external script, e.g. Python. A formalization of this which I still use myself
is pygmsh.
https://github.com/nschloe/pygmsh/_______________________________________________
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