First release of fVTKHDF: A modern Fortran library for writing VTKHDF files

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If you’re a Fortran’er, this may be of interest to you.

I’ve just published the first release of fVTKHDF, a high-level, object-oriented Fortran library for writing VTKHDF files.

It currently supports UnstructuredGrid (UG) and MultiBlockDataSet (MB) types of VTK datasets with temporal data – the itch I needed to scratch. The MB dataset is limited to a flat assembly of UG blocks (no hierarchical nesting of MB), so it’s essentially equivalent in this form to a PartitionedDataSetCollection.

The library is fully parallel, using parallel HDF5 (MPI-IO) for collective writes to partitioned datasets.

See the Github project page for more information and the Reference Manual.

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This is glorious @nncarlson ! Thanks a lot!

In your readme you mention:

ParaView 5.13+ recommended for full support of the generated files.

I would recommend 6.0 (or even 6.1!) to get the last improvements that have been added to the format :slight_smile:

Any specific reason to not support PDC, it should be pretty similar to MB ?

@lgivord @Louis_Gombert

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Any specific reason to not support PDC, it should be pretty similar to MB ?

In fact for my “flat” Assembly of leaf nodes it is identical; I only needed to assign a different value to the Type attribute. My sole reason for reverting to MB was because of this bug. It was fixed very recently, but I don’t think it made it into 9.6. My plan is to shift to PDC as soon as the fix is available in ParaView.

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Correct

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we should probably backport it in release in case we plan to do a 9.6.1, it’s an important bug fix imo

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Agreed

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Backport is here: https://gitlab.kitware.com/vtk/vtk/-/merge_requests/12972

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Excellent. Thanks!