Re: [Getfem-users] Global face index

[Torquil Macdonald Sørensen]

Hi Yves,

(sorry if you get two of these. As usual, I initially chose "Reply" instead 
"Reply to all")

Basically, I need the following in my 3d tetrahedron mesh:

A global enumeration of faces (one index value for each face). E.g. in the form 
of a mapping that for each global face index value gives me a global convex 
index value, along with a local face index within that convex.

I can create this by looping through convexes and local face indices. I would 
get a lot a duplicate faces since many convexes share faces. So I'd have to 
remove those duplicates afterwards.

But perhaps some "trick" is possible? E.g. to use a mesh_fem so that there is 
one DOF on each face, and then use the global DOF index as the global face index?


Btw, is it just my network connectivity or are the pictures on the following 
documentation page missing at the moment?:

http://download.gna.org/getfem/html/homepage/userdoc/appendixA.html

Torquil

On 05/09/10 21:18, Renard Yves wrote:
>
>
> Dear Torquil,
>
> What is your goal ? Only to number the faces (in that case, you can make
> a loop on all faces and add it to the mesh and retain the number) or
> something more complex ?
>
> Yves.
>
>
>
> Torquil Macdonald Sørensen <address@hidden> a écrit :
>
>> Hi!
>>
>> I'm trying to use the getfem++ data structures, but for something
>> other than to
>> solve PDEs with getfem.
>>
>> My current program uses getfem to generate a 3d tetrahedron mesh. In
>> addition I
>> have created a FEM_NEDELEC(3) FEM method on this mesh since my DOFs
>> (degrees of
>> freedom) are situated on the edges.
>>
>> I see that convexes and and vertices of the mesh are accessible
>> through global
>> indices.
>>
>> Since the DOFs of the FEM_NEDELEC(3) method are located on the edges
>> of each
>> tetrahedron, these are also accessible through a global index.
>>
>> But, can I also have the set of faces accessible through a global
>> index? I want
>> to calculate a sum over all faces.
>>
>> Best regards
>> Torquil Sørensen
>>
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>>
>
>
>