I am trying to read an Xdmf subset into Paraview 4.4, but I get the
assertion (debug build):
*vtkXdmfHeavyData.cxx:293: vtkDataObject
*vtkXdmfHeavyData::ReadUniformData(xdm**f2::XdmfGrid *, int): Assertion
`xmfGrid->IsUniform() && "Input must be a uniform xdmf grid."' failed.*
I dug through the backtrace, and it seems that
*vtkXdmfHeavyData::ReadData(XdmfGrid*
xmfGrid, int blockId)* is incorrectly forwarding the Subset grid to the
vtkXdmfHeavyData::ReadUniformData function.
Here's a self-contained XDMF file to test with:
<?xml version="1.0" encoding="utf-8"?>
<Xdmf Version="2.0">
<Domain>
<Grid Name="full" GridType="Uniform">
<Topology NumberOfElements="3" TopologyType="Triangle">
<DataItem Dimensions="3 3" Format="XML" ItemType="Uniform"
Name="connectivity" NumberType="Int" Precision="4">
0 1 2
3 4 5
6 7 8
</DataItem>
</Topology>
<Geometry GeometryType="XYZ">
<DataItem Dimensions="9 3" Format="XML" ItemType="Uniform"
Name="coordinates" NumberType="Float" Precision="8">
0. 0. 0.
1. 0. 0.
0. 1. 0.
1. 0. 0.
2. 0. 0.
1. 1. 0.
2. 0. 0.
3. 0. 0.
2. 1. 0.
</DataItem>
</Geometry>
</Grid>
<Grid Name="subs" GridType="Subset" Section="DataItem">
<DataItem
DataType="Int"
Dimensions="2"
Format="XML">
0 2
</DataItem>
<Grid Name="domain" GridType="Uniform" Reference="XML">
/Xdmf/Domain/Grid[1]
</Grid>
</Grid>
</Domain>
</Xdmf>
I'm relatively confident that this should be a valid XDMF file, but I'm not
positive since I wrote this by hand and the documentation for subsets is
relatively sparse.
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