[Gmsh] Runtime crash and Display nodedata with few nodes

[Christophe Geuzaine]

On 24 Jun 2013, at 13:02, corra85 at tiscali.it wrote:

> Dear Prof. Geuzaine,
> Thank you for your quick answer. I amended the 
> file as you suggested and now it works fine when opening the file. The 
> second problem I addressed, though, is not solved. My NodeData are 
> defined on a smaller node set than the total, and I cannot see it 
> anyway. I tried also with the "view5.msh" file in documentation:  if I 
> define a nodedata set for a smaller set (let say, removing one node 
> data) than the total number of nodes, I cannot see it. I attached the 
> file for clarity.

Your reduced set of nodes should at least cover one element...


> Thank you in advance,
> Corrado
> 
> ----Messaggio 
> originale----
> Da: cgeuzaine at ulg.ac.be
> Data: 23/06/2013 8.58
> A: 
> "corra85 at tiscali.it"<corra85 at tiscali.it>
> Cc: "gmsh at geuz.org"<gmsh at geuz.
> org>
> Ogg: Re: [Gmsh] Runtime crash and Display nodedata with few nodes
> 
> 
> 
> On 21 Jun 2013, at 18:38, corra85 at tiscali.it wrote:
> 
>> Dear all,
>> I 
> created the file attached according to the msh2 file 
>> format. I 
> obtain a Runtime error while trying opening it. Is there a 
>> limit on 
> the number of nodedata?
> 
> There is no limit. The problem here is that 
> your vertex tags (e.g. 11010101, 41040419, ...) span a very large 
> interval. This is not an issue for the actual mesh, but it is for the 
> NodeData. For efficiency reasons, NodeDatas use directly vectors (not 
> maps or hash maps) indexed with the vertex tags. With your tagging this 
> leads to the creation of huge vectors--mostly empty.
> 
> Simply tag your 
> vertices with consecutive tags starting at 1 and you will be fine.
> 
> I 
> will add a note about this in the documentation.
> 
> 
> 
>> Anyway, if I 
> remove all but one 
>> nodedata, it doesn't crash, but I cannot see 
> anything, probably because 
>> the number of node in the nodedata 
> section is less than the total 
>> number of nodes. Is it true? I would 
> like to see the vector nodedata as 
>> arrows, how can I achieve that?
>> 
> Thank you in advance,
>> Corrado
>> 
>> 
>> Invita i tuoi amici e Tiscali 
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> it/<FlatJackTest.msh>_______________________________________________
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> 
> -- 
> Prof. Christophe Geuzaine
> University of 
> Liege, Electrical Engineering and Computer Science 
> http://www.
> montefiore.ulg.ac.be/~geuzaine
> 
> 
> 
> 
> 
> 
> 
> 
> Invita i tuoi amici e Tiscali ti premia! Il consiglio di un amico vale più di uno spot in TV. Per ogni nuovo abbonato 30 € di premio per te e per lui! Un amico al mese e parli e navighi sempre gratis: http://freelosophy.tiscali.it/<view5.msh>

-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine