[Paraview] Fetching data from xdmf temporal collection

[Armin Wehrfritz]

Hi Jean-Michel,

just to mention, I don't think VTK is significantly more efficient than 
ParaView. In practice you shouldn't feel a difference, since all the 
heavy data handling is anyways done by VTK.

Anyway, I attached a script that shows you how to read XDMF data, step 
through the time steps, wrap the data for numpy and print out some basic 
infos.

Regarding the GetOutput() method, to get data object from the XDMF 
reader you have to use the GetOutputDataObject(0) method.
But I don't know the difference between the two of them, and this also 
may depends on your VTK version, I'm using 6.2.

-Armin







On 03/23/2015 03:15 PM, Jean-Michel wrote:
> Armin,
>
> you said you would rather use vtk directly to access raw data in xdmf
> files. I tried to follow your advice, but I struggle with the
> vtkXdmfReader. Basically, here is what I do:
>
> import vtk
>
> reader = vtk.vtkXdmfReader()
>
> reader.SetFileName(myfile)
>
> reader.ReadAllScalarsOn()
>
> reader.Update()
>
> However, I don't know how to access the data inside reader once this is
> done. The GetOutput() method doesn't seem to work. Do you know what I am
> missing here ? If not, I'll try and move the discussion over at the
> vtk-users list.
>
> Thank you for your help.
>
> Jean-Michel
>
>
>
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