[vtkusers] The VTM file format and the multiblock datasets

[Yvan Mokwinski]

Hello,

I'm struggling with the VTM file format and I need help.

I have a correct VTM file with few blocks as unstructured grids:

<VTKFile type="vtkMultiBlockDataSet" version="1.0"
byte_order="LittleEndian" header_type="UInt64">
<vtkMultiBlockDataSet>
<DataSet index="0" name="H3b_2" file="modelA4/H3b_2.vtu"></DataSet>
<DataSet index="1" name="H1b_2" file="modelA4/H1b_2.vtu"></DataSet>
<DataSet index="2" name="H2b_1" file="modelA4/H2b_1.vtu"></DataSet>
<DataSet index="3" name="H1b_1" file="modelA4/H1b_1.vtu"></DataSet>
</vtkMultiBlockDataSet>
</VTKFile>

Now I want to define 'groups' that I can check/unchecked when I visualize
the file with Paraview.

First group "MyFirstGroup" pointing to H3b_2 and H2_b1
Second group "MySecondGroup" pointing to  H2_b1 and H1b_1
Third group "MyThirdGroup" H3b_2 and H1b_1


How can I do that?

Any help would be very appreciated.
Regards,
Yvan Mokwinski
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