[Paraview] VTI AppendData Multi piece

[Nsk Nsk]

I've just realized that my issue is actually related to:
http://paraview.markmail.org/thread/nsgch2mmqlkfu7zv

When the WholeExtent is not covered by <Piece Extent>, the missing values
are random.
Is there a way to stop this from happening?

Cheers

Nick



On Fri, Feb 20, 2015 at 3:01 PM, Nsk Nsk <nazca.nsk at gmail.com> wrote:

> Hi
>
> I'm trying to manually write a vti file containing many <Piece> blocks,
> each one of them containing several appended DataArray, my current file
> looks like this:
>
> <?xml version="1.0"?>
> <VTKFile type="ImageData" version="0.1" byte_order="LittleEndian" >
>     <ImageData WholeExtent="24 40 24 40 24 40" Origin="-2.00000E-03
> -2.00000E-03 -2.00000E-03" Spacing="6.25000E-05 6.25000E-05 6.25000E-05">
>
>         <Piece Extent="26 28 26 28 26 28">
>             <CellData>
>                 <DataArray type="Float32" Name="array1" format="appended"
> offset="0" />
>                 <DataArray type="Int32" Name="array2" format="appended"
> offset="36" />
>                 <DataArray type="Int32" Name="array3" format="appended"
> offset="72" />
>             </CellData>
>         </Piece>
>         <Piece Extent="28 32 26 28 24 26">
>             <CellData>
>                 <DataArray type="Float32" Name="array1" format="appended"
> offset="108" />
>                 <DataArray type="Int32" Name="array2" format="appended"
> offset="176" />
>                 <DataArray type="Int32" Name="array3" format="appended"
> offset="244" />
>             </CellData>
>         </Piece>
>
>         ....etc
>
>     </ImageData>
>     <AppendedData encoding="raw">
>    _[#bytes_array1_Piece1][DATA_array1_Piece1][#bytes_array2_Piece1]
> [DATA_array2_Piece1][#bytes_array3_Piece1][DATA_array3_Piece1]
> [#bytes_array1_Piece2][DATA_array1_Piece2][#bytes_array2_Piece2]
> [DATA_array2_Piece2][#bytes_array3_Piece2][DATA_array3_Piece2]...etc..
>     </AppendedData>
> </VTKFile>
>
> Paraview is able to load the file but the array values seem corrupted. Is
> there any special requirement for the AppendData block of multiple pieces
> ImageData?
> Many thanks,
>
> Nick
>
>
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