Support for RectilinearGrids and StructuredGrids in VTKHDF file format

Development
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1

Hi,

I’m interested in using RectilinearGrids and StructuredGrids in the VTKHDF format. Since these formats are not currently supported or on the roadmap, I’ve taken a few minutes to translate some simple .vtr and .vts files from XML into what could be a VTKHDF version. The files are quite similar in structure to both the existing ImageData and UnstructuredGrid formats.

Here is the RectilinearGrid example:
rect_example.vtkhdf (20.2 KB)

rect_example.vtr (27.7 KB)

And here is a simple StructuredGrid example:
cylinder_segment.vts (441.6 KB)

cylinder_segment.vtkhdf (172.7 KB)

Hope this helps get the discussion started and a possible definition in place.

2 Likes
2

Thanks for writing this proposal!

For convenience, here is the hierarchy obtained in the rect_example.vtkhdf:

image

the original issue regarding this in VTK is here: https://gitlab.kitware.com/vtk/vtk/-/issues/19379

Basically, for RectilinearGrid, it follows the structure of the ImageData and adds 3 new datasets X/Y/ZCoordinates to represent the spacing.

@hakostra @danlipsa @mwestphal @Louis_Gombert @cory.quammen wdyt?

3

Looks very good.

4

Looks good :slight_smile: