[Gmsh] obtaining numbers of geometric sub-elements

[Christophe Geuzaine]

Manav Bhatia wrote:
> Hi
> 
> Given a volume and its identification, is there a way to find out the  
> identification numbers of the surfaces that make up the volume?  
> Similarly, can the line numbers for a surface be found out?

There's nothing in the language for that at the moment, although it
would be easy enough to add. When would this information be useful?

> 
> Also, I am unable to locate the fault in this statement
> 
> tmp[] = Extrude Line {1, {1,0,0}};
> 
> where Line 1 already exists, and I am trying to get the number of  
> surface created as a result of this operation.
> 

It's a little quirk in the syntax: you need a double semicolon after extrude

tmp[] = Extrude Line {1, {1,0,0}}; ;


> Thanks
> Manav
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-- 
Christophe Geuzaine
Assistant Professor, Case University, Mathematics
http://www.case.edu/artsci/math/geuzaine