[Paraview] [Xdmf] constant grid, changing attributes

[John Biddiscombe]

Dominik

I have made changes to Xdmf and vtkXdmfReader to handle new attributes 
which are
TopologyConstant and GeometryConstant within a temporal collection.

unfortunately, our Xdmf is branching quite a bit from the CVS version so 
I can't guarantee that you can use it out of the box. If you want to 
try, then have a look at look at the reader in here
https://svn.cscs.ch/pv-meshless/trunk/Utilities/Xdmf2/vtk/
I'll attach an XML example of the new attribs.

We also have a new XdmfWriter (not in above repository location), but it 
only works on special cases of data so I'm not sure if you can use it 
directly. The reader ought to at least function with CVS Xdmf. Maybe you 
can tweak your own Xdmf writing to add the attribs. If you are writing 
unstructured grids, then I can help, if not, perhaps we can talk off 
list and get something up and running.

NB : The attached xmf file has a temporal collection of multiblock 
(spatial collection ) datasets, some have constant topology/geometry 
others do not. The test is a rotating mixer inside a static region.

NB2 : I am currently on vacation, so I may not respond rapidly for a 
further week.

JB


> Is XDMF efficiently handling grids where the grid does not change in
> time, but the attributes do? I mean: will it be smart to only read the
> grid definition once and return the same instance every time a new
> timestep is requested?
>
> Will it efficiently handle cases where the geometry changes, but
> topology not?
>
> Motivation behind: I have long time series of unstructured grids where
> the grids either do not change or change only topology. It takes (too)
> long to play them in Paraview.
>
> Thanks,
> Dominik
>
> _______________________________________________
> Xdmf mailing list
> Xdmf at lists.kitware.com
> http://www.kitware.com/cgi-bin/mailman/listinfo/xdmf
>   


-- 
John Biddiscombe,                            email:biddisco @ cscs.ch
http://www.cscs.ch/
CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82

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