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

[Jerry Clarke]

John,

Thanks.. Once I get this working it'll need a lot of testing.

Jerry

John Biddiscombe wrote:
> Further to my email the other day. Putting the commented line back in, 
> did 'appear' to fix my temporal problem, but on closer inspection, 
> although the time steps were correct, the data inside them was missing. 
> Inspector showed no cells, points etc.
> 
> I reverted my own copy back a couple of revisions so that I could work 
> with my own data. I await further developments, but am available (this 
> week) for help/testing if need be
> 
> cheers
> 
> JB
> 
>> Classification:  UNCLASSIFIED Caveats: NONE
>>
>> All,
>>
>> I was out all of last week so I'm in catch up mode ....
>>
>> I was making significant changes to the XDMF reader and they are not
>> finished yet. I checked in the changes that made the spatial collection
>> of temporal collections work. The issue was that the reader was assuming
>> that a temporal collection was at the first level (which may be the most
>> common case).
>>
>> As I recall (it will take me a few hours to get back into the code) 
>> the changes that I made now treat spatial and temporal collections 
>> similarly
>> no matter the level. There's an internal flag to mark the temporal
>> collections.
>> That's why there is a big multiblock dataset for temporal collections.
>>
>> The code to now make the output of a temporal collection the same type
>> as the children (and not a multiblock) is not yet working. Hopefully I
>> can get back to it today after fighting some other fires.
>>
>> The main problem I was dealing with (other than the above temporal
>> collection
>> multiblock issue) was getting the reader to work correctly in parallel
>> when
>> the collection was not at the top level, i.e. not duplicating reads.
>>
>> Jerry Clarke
>>  
>>
>> -----Original Message-----
>> From: xdmf-bounces at lists.kitware.com
>> [mailto:xdmf-bounces at lists.kitware.com] On Behalf Of John Biddiscombe
>> Sent: Thursday, August 14, 2008 2:40 PM
>> To: Eric E. Monson
>> Cc: Renato N. Elias; xdmf at lists.kitware.com; ParaView List
>> Subject: Re: [Xdmf] Xdmf time series loads as Multi-block Dataset
>>
>> at 1390 of xdmf reader
>>         // we will not output a TemporalDataset, but use this as a flag
>> for later
>>         // Jerry Change Me
>>         sub->vtkType = VTK_TEMPORAL_DATA_SET; the sub->vtkType line was
>> commented out. Putting it back in fixes my problem, but could Renato
>> send me a small example of (or link to) his grid of spatial/temporal
>> mixmatch combination stuff so I can test the other kind. If large, email
>> me off lists for ftp info.
>>
>> thanks
>>
>> JB
>>
>>
>>
>>     Eric
>>     
>>     I just tried xdmf for the first time in a couple of weeks an
>> yes. It's     completely stuffed. I get a multiblock dataset with 800 
>> blocks,
>> each     being one timestep - instead of a single (or possibly
>> multi-block)     dataset with time varying stuff.
>>     
>>     I Can see looking at Jerry's changes on immediate probable
>> cause, but     I'd better read through the email he sent a few 
>> days/week back
>> and     review the changes. I see what Jerry has tried to do - create 
>> a     multiblock xdmf structure and just fetch the correct grid when
>> you     request a timestep - thus giving us what we want. But there's a
>> flaw in     the logic when the actual output dataset is generated - so 
>> that
>> it     creates a multiblock one instead of the type givenm by the Nth
>> (=time)     dataset inside it when we are fetching a time step which 
>> is not
>> composite.
>>     
>>     I need this to work, so I'll be looking at it soon. Ig Jerry
>> reads this     before I fix it, then feel free to step in with the 
>> correct
>> patch :)
>>     
>>     JB
>>      
>>         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
>>        
>>         ------------------------------------------------------
>>         Eric E Monson
>>         Duke Visualization Technology Group
>>        
>>        
>>        
>>         _______________________________________________
>>         Xdmf mailing list
>>         Xdmf at lists.kitware.com
>>         https://www.kitware.com/cgi-bin/mailman/listinfo/xdmf
>>                      
>>     
>>     
>>      
>>
>>
>>   
> 
>