[Paraview] [xdmf] - vtkXdmfReader - time support

[John Biddiscombe]

I have just re-uploaded the test data xdmf file because I left the full 
path (C:\temp\blah) in the file reference. I have replaced it with just 
the relative part and checked it loads ok on win32/linux.
(NB. loading in parallel failed. I will find the problem right away)

JB


> I've just checked in some changes to the vtkXdmfReader for handling 
> time dependent data.
>
> I have also uploaded a test dataset to here
> ftp://ftp.cscs.ch/out/biddisco/xdmf
>
> this contains a single Volume of dimension {24,24,24} with several 
> scalar/vector fields.
> Interesting Vector fields are
>    X-Vector {1, 0, 0}
>    Y-Vector {0, 1, 0}
>    Z-Vector {0, 0, 1}
> which makes it ideal for testing. Some other fields are block number 
> and suchlike which are only useful to me.
>
> In the Xdmf xml file, the same data is referenced twice - so there are 
> two time steps - they are actually the same data in both time steps, 
> but the second step swaps the x,y,z vector fields around by simple 
> changing the string references to datasets in the hdf5 file.
>
> In timestep 0 (time value 0.0)
> x - X
> y - Y
> z - Z
> In timestep 1 (time value 0.2)
> x - Y
> y - Z
> z - X
>
> The changes I have made to the XdmfReader might break some code since 
> I had to change the Grid storage from a Map structure to a vector - to 
> allow the same grid name to be used for multiple time steps. There are 
> also many other small tweaks/fixes all over the place.
>
> I will check in some changes to the vtkXdmfWriter later, but will post 
> separately on that.
>
> Please let me know of any problems this introduces - I think there is 
> still much work to be done (c.f. other vtk data types)
>
> JB
>


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