[Paraview] Xdmf time series loads as Multi-block Dataset

[Eric E. Monson]

Hey all,

Maybe I'm behind on my Xdmf XML format again, but my files that a  
month or two ago loaded a time series of unstructured grids now loads  
into ParaView CVS as a Multi-block Dataset with one block for each  
time step at each time point.

Let's say I have 1200 Polyvertex time steps in my file. I can (slowly)  
step through the animation of my grid, but at each time point the  
progress bar is cycling through a bunch of work, and each time point  
lists (in the Information tab Data Hierarchy pane) a Multi-block  
Dataset made up of 1200 Unstructured Grids. Clicking on each of these  
blocks reveals that only the "current" time step block has Data Arrays  
associated with the grid. So, at each time step of the animation, the  
process seems very slow because 1200 blocks are being loaded, only one  
of which actually has real data in it. (The Time pane at the bottom of  
the Information tab always lists the correct time indices and values  
for the whole series.)

Maybe this is just a change in the way time series are dealt with, but  
it is much slower with my data sets, and it made more sense to me to  
have each time step able to be represented as a simple grid, if  
desired. (I have been using a self-modified vtkXdmfReader.cxx file for  
a while, so I'm not sure when this multi-block issue would have  
appeared.)

Thanks,
-Eric

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Eric E Monson
Duke Visualization Technology Group