[Paraview] vtu files with two pieces

[Samuel Key]

Sreejith,

For two truly separate parts, create two separate *.vtu files. Each of 
the files should have a unique name (not really necessary for PV). PV is 
happy to read and display multiple datum sets -- even the same datum set 
twice. If you plan later to have many parts (for example, 100 parts), 
the collection can be aggregated with via a single *.pvd file (a 
meta-file or "mother-file"). Having PV read the single *.pvd file will 
load all of the *.vtu files referenced within the *.pvd file.

A good rule to follow is to have each part as a "standalone" displayable 
graphical object.

Later on when you want to process large sets of data, EnSight-formatted 
binary files incorporate a "part" concept. Also, the EnSight-formatted 
data set has constructs for parallel file sets, and multiple files for 
individual data streams to get around file size limitations.

Sam

Sreejith Kuttanikkad wrote:
> Dear all,
> 
> I have tried to write an ascii vtu file with two pieces as shown below. 
> However when I opened it using paraview, i can only see one data set.
> Could you please tell me the format of  vtu files with two pieces.  How 
> can i  get both data sets into paraview.?
> 
> <?xml version="1.0" ?>
> <VTKFile byte_order="LittleEndian" type="UnstructuredGrid" version="0.1">
> <UnstructuredGrid>
> <Piece NumberOfCells="4" NumberOfPoints="4">
> <Points>
> <DataArray NumberOfComponents="3" format="ascii" type="Float32">
> 0 0 0 1 0 0 0 1 0  1 1 0
> </DataArray>
> </Points>
> <Cells>
> <DataArray Name="connectivity" format="ascii" type="Int32">
> 0 1 0 2 2 3 1 3
> </DataArray>
> <DataArray Name="offsets" format="ascii" type="Int32">
> 2 4 6 8
> </DataArray>
> <DataArray Name="types" format="ascii" type="UInt8">
> 3 3 3 3
> </DataArray>
> </Cells>
> <PointData>
> <DataArray Name="scalar1" format="ascii" type="Float32">
> 0.836841 0.828652 0.777264 0.669688
> </DataArray>
> <DataArray Name="status1" format="ascii" type="Float32">
> 0 0 0 0
> </DataArray>
> </PointData>
> <CellData/>
> </Piece>
> <Piece NumberOfCells="4" NumberOfPoints="4">
> <Points>
> <DataArray NumberOfComponents="3" format="ascii" type="Float32">
> 0.5 0 0 0 0.5 0 1 0.5 0 0.5 1 0
> </DataArray>
> </Points>
> <Cells>
> <DataArray Name="connectivity" format="ascii" type="Int32">
> 0 1 0 2 1 3 2 3
> </DataArray>
> <DataArray Name="offsets" format="ascii" type="Int32">
> 2 4 6 8
> </DataArray>
> <DataArray Name="types" format="ascii" type="UInt8">
> 3 3 3 3
> </DataArray>
> </Cells>
> <PointData>
> <DataArray Name="scalar2" format="ascii" type="Float32">
> 0.768523 0.627182 0.846613 0.66475
> </DataArray>
> <DataArray Name="status2" format="ascii" type="Float32">
> 1 1 1 1
> </DataArray>
> </PointData>
> <CellData/>
> </Piece>
> </UnstructuredGrid>
> </VTKFile>
> 
> thanks,
> Sreejith
> 
> 
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