[vtkusers] Different behavior of vtkXMLPUnstructuredGridWriter in VTK 7.1

[John Peterson]

On Mon, Dec 5, 2016 at 11:32 AM, Andy Bauer <andy.bauer at kitware.com> wrote:

> Hi,
>
> Can you verify that there are indeed points in
> vtk_diff_serial_mesh_parallel_out_005_1.vtu in the older version of VTK?
> The PXML writers were changed such that they wouldn't write out data files
> for data set pieces that didn't have any points.
>

Yes, there are points in both files.  It's a 2x2 mesh of Quad4 elements
split into two halves.  Here are the contents of the file you mentioned.

<?xml version="1.0"?>
<VTKFile type="UnstructuredGrid" version="0.1" byte_order="LittleEndian"
header_type="UInt32" compressor="vtkZLibDataCompressor">
  <UnstructuredGrid>
    <Piece NumberOfPoints="6" NumberOfCells="2">
      <PointData>
        <DataArray type="Float64" Name="aux" format="ascii" RangeMin="0"
RangeMax="0">
          0 0 0 0 0 0
        </DataArray>
        <DataArray type="Float64" Name="u" format="ascii"
RangeMin="0.074429857677" RangeMax="1.0000000002">
          1.0000000002 1.0000000002 1.0000000002 0.074429857677
0.074429857773 0.074429857977
        </DataArray>
      </PointData>
      <CellData>
        <DataArray type="Int32" Name="libmesh_elem_id" format="ascii"
RangeMin="1" RangeMax="3">
          1 3
        </DataArray>
        <DataArray type="Int32" Name="subdomain_id" format="ascii"
RangeMin="0" RangeMax="0">
          0 0
        </DataArray>
        <DataArray type="Int32" Name="processor_id" format="ascii"
RangeMin="1" RangeMax="1">
          1 1
        </DataArray>
      </CellData>
      <Points>
        <DataArray type="Float64" Name="Points" NumberOfComponents="3"
format="ascii" RangeMin="0.5" RangeMax="1.4142135624">
          1 0 0 1 0.5 0
          1 1 0 0.5 0 0
          0.5 0.5 0 0.5 1 0
        </DataArray>
      </Points>
      <Cells>
        <DataArray type="Int64" Name="connectivity" format="ascii"
RangeMin="0" RangeMax="5">
          3 0 1 4 4 1
          2 5
        </DataArray>
        <DataArray type="Int64" Name="offsets" format="ascii" RangeMin="4"
RangeMax="8">
          4 8
        </DataArray>
        <DataArray type="UInt8" Name="types" format="ascii" RangeMin="9"
RangeMax="9">
          9 9
        </DataArray>
      </Cells>
    </Piece>
  </UnstructuredGrid>
</VTKFile>


-- 
John
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