[Paraview] Merging VTK Files

[Charles Law]

Alex,

I assume (Berk's question) that each sub domain is a separate spatial 
partition and each file has the same arrays (different geometry).

I do not know what type of data you are handling (unstructured grid, 
structured grid ...)

Here are your options:

1:  Use VTK to append all the datasets into one big file.
         vtkAppendFilter will create a single output (unstructured grid).
         vtkAppendPolyData is the same but takes polydata input and 
produces polydata output.

2: Make a pvtk (extension .pvtk) XML file that looks like this:

<File version="pvtk-1.0"
       dataType="vtkUnstructuredGrid"
       numberOfPieces="2" >
   <Piece fileName="ghost.0.vtk" />
   <Piece fileName="ghost.1.vtk" />
</File>

This file groups the subfiles so ParaView reads them as one.  This XML file 
is a little more complicated for structured data sets, but not much.



In the near future, ParaView (1.0) will be able to append datasets from the 
user interface.

Charles.



At 03:22 PM 2/28/2003 +0100, Alexandre FOURNIER wrote:
>Hello All,
>
>I am using Paraview in order to visualize
>scalar (vector) fields produced by a parallel program.
>
>Each processor currently outputs its own *.vtk
>file, which corresponds to the value of the fields
>in the subdomain it's been allocated.
>
>I would like to know if there is a way of merging
>these *vtk files into one large vtk file that I would
>then visualize using Paraview.
>
>Alternatively, I would like to know if Paraview
>can merge these datasets after having loaded each one of them
>separately.
>
>Thanks in advance,
>
>Alex.
>
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