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Created by Mathieu Westphal@mwestphalDeveloper

XML Writer create multiblock root associated FieldData TimeValue with temporal dataset

Opening a temporal multiblock dataset then saving the data as a .vtm file create a multiblock root associated FieldData with strange effect in ParaView. Using root associeated field data can have unintended effects in ParaView:

Steps to reproduce:

  • Open ParaView
  • Open can.ex2, Apply
  • Save data as a .vtm file
  • Inspect .vtm file

The resulting field data is visible in the .vtm file

<VTKFile type="vtkMultiBlockDataSet" version="1.0" byte_order="LittleEndian" header_type="UInt64">
  <vtkMultiBlockDataSet>
    <Block index="0" name="Element Blocks">
      <DataSet index="0" name="Unnamed block ID: 1 Type: HEX" file="testCan/testCan_0_0.vtu"/>
      <DataSet index="1" name="Unnamed block ID: 2 Type: HEX" file="testCan/testCan_1_0.vtu"/>
    </Block>
    <Block index="4" name="Side Sets">
      <DataSet index="0" name="Unnamed set ID: 4"/>
    </Block>
    <Block index="7" name="Node Sets">
      <DataSet index="0" name="Unnamed set ID: 1"/>
      <DataSet index="1" name="Unnamed set ID: 100"/>
    </Block>
  </vtkMultiBlockDataSet>
  <FieldData>
    <DataArray type="Float64" Name="TimeValue" NumberOfTuples="1" format="binary" RangeMin="0" RangeMax="0">
      CAAAAAAAAAAAAAAAAAAAAA==
    </DataArray>
  </FieldData>
</VTKFile>

Another approach would be to write the field data on each leaf node instead.

Edited by Mathieu Westphal
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