[vtkusers] Partitioning Data

[Terry Jordan]

Yes, I want to break the mesh down.  I want to partition the entire data set into 4 chunks.  Does anyone have a link to sample code?  I tried to use the distributed data filter, but was unsuccessful in its implementation.  I assume the file format would still be a pvtu and 4 vtus.

>>> "Berk Geveci" <berk.geveci at kitware.com> 12/28/2009 10:18 PM >>>
or the distributed data filter in VTK.

On Mon, Dec 28, 2009 at 5:57 PM, Dominik Szczerba <dominik at itis.ethz.ch> wrote:
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> I don't think this is intended to partition your mesh, or at least I
> would be highly (if positively) surprised.
>
> Do you not mean to partition a mesh for e.g. domain decomposition
> purposes or other parallel applications? Then metis or chaco is what you
> need here.
>
> Dominik
>
> Terry Jordan wrote:
>>
>> I am trying to partition a unstructured grid into 4 evenly sized
>> pieces.  Currently I am doing the following:
>>
>> vtkXMLPUnstructuredGridWriter *writer =
>> vtkXMLPUnstructuredGridWriter::New();
>> writer->SetInput( filteredGrid );
>> writer->SetFileName(vtkFilename);
>> writer->SetNumberOfPieces( 4 );
>> writer->SetStartPiece(0);
>> writer->SetEndPiece(3);
>> writer->Write();
>>
>> filteredGrid is a vtkUnstructuredGrid
>>
>> The result of this code is 4 copies of the data (1 pvtu and 4 vtu).
>> Each is identical to the original data.  What am I missing?  I am
>> running this code on a single cpu without the use of MPI.  Do I have to
>> use MPI?
>>
>> Thanks in advance.
>>
>>
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