[Paraview] XMLUnstructuredGridWriter and VTK_POLYHEDRON elements

[Paul Edwards]

Hi Joe,

I've seen this before and there is a bug report in mantis here:

http://www.paraview.org/Bug/view.php?id=13382

There has also been a patch posted to the vtk-developers list a while back
although I haven't tested it:

http://markmail.org/message/zg3damrg27p5sgue

Regards,
Paul

On 10 October 2014 00:32, Insley, Joseph A. <insley at anl.gov> wrote:

>  Hi,
>
>  I have a serial vtu dataset provided by one of my users.  Their current
> code can produce this in either ascii or inline binary.  I am currently
> trying to convert this to appended binary (ultimately to pvtu with appended
> binary).
> I'm having trouble, which I now believe may stem from the data containing
> VTK_POLYHEDRON.
>
>  I have a simple python script that I use with pvbatch to do this
> conversion, but I see the same results when I load the original data set
> with ParaView (4.1.0, in client/server mode), and use the Save Data option
> and save as vtu.
> I get the same results for each input format (ascii or inline binary), and
> output format (ascii, binary, appended).
>
>  The first few lines of the original vtu file look like this:
>
>  <?xml version="1.0"?>
>   <VTKFile type="UnstructuredGrid" version="0.1" byte_order="BigEndian">
>   <UnstructuredGrid>
>     <Piece NumberOfPoints="1699427" NumberOfCells="384126">
>
>  The first few lines of the converted file look like this:
>
>  offset="177748206"ructuredGrid" version="0.1" byte_order="LittleEndian">
>   <UnstructuredGrid>
>     <Piece NumberOfPoints="1699427"              NumberOfCells="384126"
>            >
>
>
>  Something is clearly getting jumbled at the beginning of the converted
> file.  If I manually edit the header of the file to read  <VTKFile
> type="UnstructuredGrid", there are still problems with the file.  In that
> case the info tab in ParaView reports the correct number of points and
> cells, but no geometry is drawn.   I have successfully converted other vtu
> files using this same method.  The primary difference that I've been able
> to identify is that the files that are not converting happily contain
> VTK_POLYHEDRON elements.
>
>  Has anyone else seen similar behavior?
>
>  Thanks,
> joe
>
>   ===================================================
>  joseph a. insley
>  insley at anl.gov
>  argonne leadership computing facility                       (630)
> 252-5649
>  argonne national laboratory
>
>
>
>
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