[MOAB-dev] h5m with data

[Nico Schlömer]

In both ways, actually. I need to build h5m files from data and I need to
extract data from h5m meshes.
With [1], I'm digging my way through understanding the sets group now.

--Nico

[1] https://trac.mcs.anl.gov/projects/ITAPS/wiki/MOAB/h5m

On Mon, Nov 9, 2015 at 2:53 AM Patrick Shriwise <shriwise at wisc.edu> wrote:

> Hi Nico,
>
> I see. I may have misunderstood your problem. It seems you're trying to
> apply data to the mesh. Is that right?
>
>
> Cheers,
>
> Patrick C. Shriwise
> Research Fellow
> University of Wisconsin - Madison
> Engineering Research Building - Rm. 428
> 1500 Engineering Drive
> Madison, WI 53706
> (608) 446-8173
>
> On 11/08/15 20:03, Nico Schlömer wrote:
>
> Thanks Patrick for your reply.
>
> I'm still having problems where data should be stores. In a h5m file, I
> see tags, I see sets with tags in them, and it seems they are somehow
> related, but I don't know where and how to put the actual data. I would
> help to see a file with some mesh and a custom data element in it, e.g., an
> array of values associated with the vertices.
>
> Cheers,
> Nico
>
> On Sun, Nov 8, 2015 at 9:20 PM Patrick Shriwise <shriwise at wisc.edu> wrote:
>
>> Hi Nico,
>>
>> The vertex data should be stored in MOAB tags. You can access these tags
>> via their name. There is a set of conventions for the tag names in an
>> Exodus file (here
>> <http://ftp.mcs.anl.gov/pub/fathom/moab-docs/MBTagConventions_8hpp.html>
>> I think). However, if the tag has a custom name and isn't recognized by the
>> Exodus reader, then the data might not be read in from the Exodus file and
>> as a result won't be saved into the .h5m. Do you have an idea of what the
>> tag name might be for your data?
>>
>> There's also a good example here
>> <http://ftp.mcs.anl.gov/pub/fathom/moab-docs/SetsNTags_8cpp-example.html>
>> of how to access the tag data on an entity. The example I linked you to
>> accesses EntitySets rather than Entities, but they work the same way.
>>
>> If you think the data might be in the .h5m, you can use
>> tag_get_tags_on_entity
>> <http://ftp.mcs.anl.gov/pub/fathom/moab-docs/classmoab_1_1Interface.html#a6c737e7900d9c1b29b53d994076d204f>
>> to get all of the tags on a vertex and then check for the tag data you're
>> looking for. An easier way of doing this in the cmd line is by using mbsize
>> -t <your_file>.h5m to print out the count by tag.
>>
>> Hope this helps!
>>
>> Cheers,
>>
>> Patrick C. Shriwise
>> Research Fellow
>> University of Wisconsin - Madison
>> Engineering Research Building - Rm. 428
>> 1500 Engineering Drive
>> Madison, WI 53706
>> (608) 446-8173
>>
>> On 11/08/15 13:43, Nico Schlömer wrote:
>>
>> Hi everyone,
>>
>> I have an Exodus file with vertex data in it (i.e., "a function" defined
>> on the vertices). When converting this file to h5m, where does the vertex
>> data go? And how to I retrieve the data after having it read with
>> `load_file()`?
>>
>> Cheers,
>> Nico
>>
>>
>>
>
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