Support of Polyhedral Cells with XDMF 3
There are 3 readers for XDMF files in Paraview: XDMF Reader, Xdmf3ReaderS, Xdmf3ReaderT. But there is no information how they differ among each other.
I noticed that:
- XDMF Reader: cannot read polyhedral cells, can read grid-of-grids
- Xdmf3ReaderS: can read polyhedral cells, cannot read grid-of-grids
Reading a polyhedral grid with Xdmf3ReaderS, I also noted that the time tag is not properly imported.
The XDMF website says that the tag "NumberOfElements" is only for clarity; however, Paraview needs that value at least for a few cell types (polyvertex, polyline, polygon) otherwise it crashes.
Clarify/extend your documentation and ensure that all data interfaces run as expected.