[Paraview] Problems reading 2nd order mixed meshes in xdmf format

[Dominik Szczerba]

Hi

PV is crashing reading a real-life mixed mesh, so in attempt to debug
the problem I created one-element mesh only to find that it also does
not work. I do not see why it should not work, according to the specs?
I have originally attached the mesh that causes the error. Here it is
again. I will try to report a bug at the bug tracker.

<?xml version="1.0" ?>
<Xdmf>
<Domain Name="Unnamed">
<Grid Name="Mesh">

<Geometry GeometryType="XYZ">
  <DataItem Format="XML" Dimensions="10 3">
    0.0 0.0 0.0
    1.0 0.0 0.0
    0.0 1.0 0.0
    0.0 0.0 1.0
0.5 0.0 0.0
0.5 0.5 0.0
0.0 0.5 0.0
0.0 0.0 0.5
0.5 0.0 0.5
0.0 0.5 0.5
  </DataItem>
</Geometry>

<Topology TopologyType="Mixed" NumberOfElements="1" >
  <DataItem Format="XML" DataType="Int" Dimensions="11">
    26   0 1 2 3 4 5 6 7 8 9
  </DataItem>
</Topology>

</Grid>
</Domain>
</Xdmf>

Regards,
Dominik

On Mon, Oct 21, 2013 at 9:34 PM, Jason Fleming
<jason.fleming at seahorsecoastal.com> wrote:
> Hello Dominik
>
> It looks like maybe you haven't provided enough information to Paraview
> about your Topology. You've set the TopologyType to Mixed, but this is for a
> mixture of elements of different types, whereas you actually only have one
> single element of a single type.
>
> Looking at xdmf.org, it looks like the value "Tet_10" is available for
> TopologyType. Is this value appropriate for you? I took your example xml and
> changed Mixed to Tet_10 and was then able to load the file into Paraview.
>
> Cheers
> Jason
>
>
>
>
>
> On Mon, Oct 21, 2013 at 10:24 AM, Dominik Szczerba <dominik at itis.ethz.ch>
> wrote:
>>
>> I have received no feedback to my question. Did I overlook something
>> obvious and it means that there are better / more popular formats for
>> such datasets supported by ParaView?
>>
>> Regards,
>> Dominik
>>
>> On Wed, Oct 9, 2013 at 1:00 PM, Dominik Szczerba <dominik at itis.ethz.ch>
>> wrote:
>> > Hi,
>> >
>> > I am unable to load the following trivial (one second order tet
>> > element) into Paraview. I would be very glad for some pointers how to
>> > fix it...
>> >
>> > Regards
>> > Dominik
>> >
>> > <?xml version="1.0" ?>
>> > <Xdmf>
>> > <Domain Name="Unnamed">
>> > <Grid Name="Mesh">
>> >
>> > <Geometry GeometryType="XYZ">
>> >   <DataItem Format="XML" Dimensions="10 3">
>> >     0.0 0.0 0.0
>> >     1.0 0.0 0.0
>> >     0.0 1.0 0.0
>> >     0.0 0.0 1.0
>> > 0.5 0.0 0.0
>> > 0.5 0.5 0.0
>> > 0.0 0.5 0.0
>> > 0.0 0.0 0.5
>> > 0.5 0.0 0.5
>> > 0.0 0.5 0.5
>> >   </DataItem>
>> > </Geometry>
>> >
>> > <Topology TopologyType="Mixed" NumberOfElements="1" >
>> >   <DataItem Format="XML" DataType="Int" Dimensions="11">
>> >     26   0 1 2 3 4 5 6 7 8 9
>> >   </DataItem>
>> > </Topology>
>> >
>> > </Grid>
>> > </Domain>
>> > </Xdmf>
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> --
> Dr. Jason G. Fleming
> Chief Engineer, Seahorse Coastal Consulting
> 3103 Mandy Ln
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