[Paraview] Extents in PVTI Files

[Kent Eschenberg]

Thanks! That made no difference. The first vti file uses

   WholeExtent="0 127 0 127 0 127"
   Piece Extent="0 127 0 127 0 127"

and the second one now uses

   WholeExtent="128 255 0 127 0 127"
   Piece Extent="128 255 0 127 0 127"

Using 32 proccesses the error messages say the following extents cannot be filled:

    127 128  0 63  0 63
    127 128  0 63  63 95
    127 128  0 63  95 127
    127 128  63 95  0 63
    127 128  95 127  0 63
    127 128  63 127  63 95
    127 128  63 127  95 127

This may be irrelevant but its interesting to note that all include the "gap" at (127,128) between the two vti files. So I again ask, is there an unstated requirement that the vti files must overlap?

TIA!
Kent
Pittsburgh Supercomputing Center


Berk Geveci wrote:
> Kent,
> 
> I believe the problem lies in the extent of the vti files. They cannot
> be  0 127 0 127 0 127. They have to be with respect to the "global"
> extent. For example, one of them may be 128 255 0 127 0 127...
> 
> -berk
> 
> 
> On Thu, May 8, 2008 at 5:27 PM, Kent Eschenberg <eschenbe at psc.edu> wrote:
>> I'd like to use a pvti file to read many vti files but the attached example
>> fails with messages like this:
>>
>> ===
>> Process id: 9 >> ERROR: In
>> /usr/local/packages/paraview/Edge/ParaView3/VTK/IO/vtkXMLPStructuredDataReader.cxx,
>> line 452
>> vtkXMLPImageDataReader (0x1a41c8f0): No available piece provides data for
>> the following extents:
>>   127 191  63 127  0 63
>> The UpdateExtent cannot be filled.
>> ===
>>
>> Each of the vti files can be displayed just fine and have these parameters:
>>  origin 0 0 0
>>  spacing 1 1 1
>>  extent 0 127 0 127 0 127
>>
>> In the pvti file I'm a little confused about the definition of extent and
>> cannot find the answer in the VTK file format guide. The key lines in my
>> file are these:
>>
>>  <Piece Extent="000 127 000 127 000 127" Source="test0.vti"/>
>>  <Piece Extent="128 255 000 127 000 127" Source="test1.vti"/>
>>
>> I've seen examples where the two files overlap by one point so that the
>> above two lines would read
>>
>>  <Piece Extent="000 127 000 127 000 127" Source="test0.vti"/>
>>  <Piece Extent="127 255 000 127 000 127" Source="test1.vti"/>
>>
>> Is that an unstated requirement for pvti? I'm using ParaView from CVS around
>> 5/6. This problem occurs when running standalone or with a server running in
>> parallel on a Linux cluster.
>>
>> Kent
>> Pittsburgh Supercomputing Center