[Gmsh] About Gmsh

[Christophe Geuzaine]

Luiz Guilherme Heidorn Bronzato wrote:
> Hi! My name is Luiz Guilherme, I study in USP, here in Brazil, and
> I'm a studant of eletric engineering. I'm doing, with one of my
> professors, a research about eletromagnetism and we use Gmsh to
> divide our geometris in triangles to use in a program that we are
> doing that calculates magnetism scattering. Something that we have to
> do in our program is to numer the diferents parts of the geometry. In
> Gmsh we have the possibility of make this using the physical
> elements, but we want to put a order in the number, for exemple, the
> first part with number one, the second with number two, like this.
> But when we define physical entites in Gmsh, I can't control the
> order of the numbers, if I have already make, for exemple, 10
> elementary entites, the first physical entite will apear with number
> 11 and I want this to apear with a number that I chose. I know that I
> can modify this in the arquive .geo, but I want to know if there is a
> way to do this with a better interface, direct in the program when
> I'm defining the physical entites, if it's possible, if I can write a
> number in the keyboard, like 4, and after define a physical entite
> and this entite will be associete with number 4.
> 

Sure: just modify the ".geo" file with a text editor and choose any
number you want for the physical entities.

(If you want the automatic numbering to start at 1 instead of after the 
last used number, you can put "Geometry.OldNewReg=0;" in the option file 
~/.gmsh-options.)

> Thank you for your atention, Luiz Guilherme.
> 
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> 


-- 
Christophe Geuzaine
Assistant Professor, Case Western Reserve University, Mathematics
http://www.case.edu/artsci/math/geuzaine