[Paraview] XDMF data set not showing, or crashes

[Jon Goldman]

Hi Eric,

I don't think it's a polar coordinates issue -- the data happens to 
originate from a polar system, but (in theory) is merely mapped to a 
Cartesian system via the Uniform 2DRectMesh.

I too had your idea of "play with a smaller sample file that just uses 
light data" -- and my simple tests, and the standard Xdmf example file 
you provided below also loads fine for me in ParaView. But thanks for 
the suggestion, and I may need to go further down this path to help 
figure out if it's the data per se, or some other combination of 
HDF5/XDMF/ParaView.

cheers,
Jon

On 1/27/2011 11:03 AM, Eric E. Monson wrote:
> Hey Jon,
>
> I've never tried to use VxVyVz type geometry before, but I wonder 
> whether it's some sort of problem with you trying to specify polar 
> coordinates when it's expecting XYZ? You might want to play with a 
> smaller sample file that just uses light data first, and then if you 
> get that working you can make sure the same sort of arrays exist in 
> your HDF5 file. Here's a sample that I modified from one of the 
> standard Xdmf example data files (and which loads in ParaView 3.8.1 
> fine on my machine):
>
> <?xml version="1.0" ?>
> <!DOCTYPE Xdmf SYSTEM "Xdmf.dtd" []>
> <Xdmf xmlns:xi="http://www.w3.org/2001/XInclude" Version="2.0">
> <Domain>
> <Information Name="Description">
>             Example of a 2DRectMesh Topology with VxVy Geometry
> </Information>
> <Grid Name="2DRectMesh" GridType="Uniform">
> <Topology TopologyType="2DRectMesh"
>                 Dimensions="4 3">
> </Topology>
> <Geometry Type="VXVY">
> <!-- VX -->
> <DataItem Format="XML" Dimensions="4">
>                 0.0 1.0 2.0 4.0
> </DataItem>
> <!-- VY -->
> <DataItem Format="XML" Dimensions="3">
>                 0.0 1.0 3.0
> </DataItem>
> </Geometry>
> <Attribute Name="Node Centered Values" Center="Node">
> <DataItem Format="XML" Dimensions="4 3">
>                 100 200 300 400
>                 500 600 700 800
>                 900 1000 1100 1200
> </DataItem>
> </Attribute>
> <Attribute Name="Cell Centered Values" Center="Cell">
> <DataItem Format="XML" Dimensions="3 2">
>                 100 200 300
>                 400 500 600
> </DataItem>
> </Attribute>
> </Grid>
> </Domain>
> </Xdmf>
>
> Good luck,
> -Eric
>
> ------------------------------------------------------
> Eric E Monson
> Duke Visualization Technology Group
>
>
> On Jan 27, 2011, at 11:04 AM, Jon Goldman wrote:
>
>> Hi,
>>
>> We have a 2D Uniform grid data set in XDMF format that we are trying 
>> to visualize with ParaView. The data is stored in a 1MB HDF5 data 
>> set. The (light) meta xdmf file is attached to this email.
>>
>> I am seeing some problems when trying to load the data-- usually 
>> ParaView either crashes, or the data does not show. I have tried the 
>> PV 3.8.1 Windows binaries as well as building ParaView from source 
>> that I pulled a few days ago from the git://paraview.org/ParaView.git 
>> repository.
>>
>> After loading the data and hitting Apply, the 3D render window will 
>> be empty. What I've noticed is that the Y-range of the Bounds will 
>> sometimes be extremely large. For example here is a snapshot from the 
>> Information tab:
>>
>> <moz-screenshot-4.png>
>> Are these known issues with ParaView?
>>
>> Or perhaps the data is mal-formed, I am new to XDMF, so it'd help to know if there is an error in the .xmf file.
>>
>> HDF5 tools like HDFView and h5dump don't report any anomalies on the HDF5 file that goes with the heavy data.
>>
>> thanks
>> -- 
>> *Jon Goldman*
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-- 
*Jon Goldman*
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