[Paraview] Material Interface Filter undercounts on large datasets

[Kashiwa, Bucky]

Dear ParaView Friends:  We have been very successful using the Material
Interface Filter, on grid-based datasets, for counting fragments of a
fractured shell, in all versions including v5.5.0.  A very peculiar thing
happens when the non-overlapping AMR dataset is large: the filter
completely fails to count the fragments.  That is, the result of applying
the filter is four (4) fragments, when there should by of order thousands.
 The filtering result on two datasets is given in the table below.  The
first, labeled MR is for a medium-resolution case, and the second labeled
HR is a high-resolution case (both are the same calculation, with
different grid resolution).  These datasets are available on the LANL
yellow net (but cannot be transferred away, at least right now).  We
remain hopeful that paraview can correctly count the fragments in the HR
case.  There will be future cases that are even larger.  If there are any
preference switches that can be tried, or other build configurations, we
can test them very quickly.  Thanks much, Bucky K.


++++++++++++++++++++++++++++++++++++++++++++++++++++++

      MR                 HR
14,315,904 cells      107,868,672 cells
15,228,928 points     114,216,960 points
6.3e+2 MB             4.7e+3 MB
128 files             768 files
2096 fragments        4 (four) fragments

(the datafiles are created one each per PE,
 using the paraview XMLHierarchicalBoxDataWriter;
 observing isosurfaces on both datasets suggests that
 the HR case should have >3000 fragments.)

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<>Bucky Kashiwa PhD, PE  <> Post: MS B216, Los Alamos, NM  87545       <>
<>  Ofc: TA3-SM123-RM276 <>Email: bak at lanl.gov, kashiwa at qwest.net      <>
<>Voice: 505-667-8812    <>  Fax: 505-665-5926  <>
                         <> Home: 505-988-7332  <> Cell: 505-795-5581  <>
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