[Paraview] order of components XDMF tensors paraview

[Dan Lussier]

Thanks - those are indeed the correct ordering for the tensors.
Thanks for the nudge towards figuring it out.

Dan

On Fri, Oct 8, 2010 at 11:29 AM, Felipe Bordeu
<felipe.bordeu at ec-nantes.fr> wrote:
> with this exemple you can find the correct order.
>
> for tensor6 the order is 0 1 2 1 3 4 2 4 5 so like in a matrix
> 0 1 2
> 1 3 4
> 2 4 6
>
> I am pretty sure that for tensor the order is  0 1 2 3 4 5 6 7 8
> 0 1 2
> 3 4 5
> 6 7 8
>
> but you have to check
>
> <?xml version="1.0" ?>
> <!DOCTYPE Xdmf SYSTEM "Xdmf.dtd" []>
> <Xdmf Version="2.0" xmlns:xi="http://www.w3.org/2001/XInclude" >
> <Domain Name="ASCII.xdmf">
> <Grid Name="Domain 1x1x1" >
> <Topology TopologyType="Quadrilateral" NumberOfElements="1" >
> <DataItem  Format="XML" NumberType="int" Dimensions="1 6">
>  0 1 2 3
> </DataItem>
> </Topology>
> <Geometry GeometryType="XYZ">
> <DataItem  Format="XML" NumberType="Float" Dimensions="6 3">
>  0. 0. 0.
>  1. 0. 0.
>  1. 1. 0.
>  0. 1. 0.
> </DataItem>
> </Geometry>
> <Attribute Name="tensor6" Center="Cell"  AttributeType="Tensor6" >
> <DataItem  Format="XML" NumberType="Float" Dimensions="1 6">
>  0.0000000000000000  1.0000000000000000 2.0000000000000000
> 3.0000000000000000 4.0000000000000000 5.0000000000000000
> </DataItem>
> </Attribute>
> <Attribute Name="tensor" Center="Cell"  AttributeType="Tensor" >
> <DataItem  Format="XML" NumberType="Float" Dimensions="1 9">
>  0.0000000000000000 1 2 3 4 5 6 7 8
> </DataItem>
> </Attribute>
> </Grid>
> </Domain>
> </Xdmf>
>
> Felipe
>
> On 08/10/2010 17:55, Dan Lussier wrote:
>>
>> I have taken to building my vectors in XDMF using the following XML:
>>
>> <  ---- BUNCH OF SETUP XML>
>>
>>
>> <Attribute Type="Vector" Center="Node" Name="force">
>>       <DataItem ItemType="Function" Function="JOIN($0, $1, $2)"
>> Dimensions="4000 3">
>>                 <DataItem Name="fx" Format="HDF" DataType="Float"
>> Dimensions="4000">
>>                         test.h5:/fx
>>                 </DataItem>
>>                 <DataItem Name="fy" Format="HDF" DataType="Float"
>> Dimensions="4000">
>>                         test.h5:/fy
>>                 </DataItem>
>>                 <DataItem Name="fz" Format="HDF" DataType="Float"
>> Dimensions="4000">
>>                       test.h5:/fz
>>               </DataItem>
>>       </DataItem>
>> </Attribute>
>>
>> So, for cartesian tensors, this is the usual (x,y,z) ordering mapped
>> to (comp0, comp1, comp2)
>>
>> In the case of both symmetric tensors (Type=Tensor6) and non-symmetric
>> tensors (Type=Tensor), what ordering should I use?  This type of
>> information is not on the XDMF website and I wasn't able to figure it
>> out via playing around with visual representation of mock tensors in
>> PV itself.
>>
>> Thanks so much.
>>
>> Dan
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>
> --
>
> Felipe Bordeu Weldt
> Ingénieur de Recherche
> -------------------------------------
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