[Paraview] [EXTERNAL] Decode a vtu file

[Mark Olesen]

Hi Andi,

The document that Ken referenced (pg 15 onwards are what you need) are actually enough. However if I understand correctly, you probably just want a really quick solution and don't want to wade through all the details. My suggestion would be to load your file in paraview and then re-save it from there.

File > Save Data: vtm/vtp/vtu ...

You should get a "Configure Writer" dialog. Select the appropriate data mode (ASCII, unencoded) and this should give you really quick insight into the contents in an easily readable form.

Cheers,
/mark

________________________________________
From: ParaView <paraview-bounces at paraview.org> on behalf of Andi Hartarto <andi3173 at gmail.com>
Sent: Saturday, January 14, 2017 7:58 AM
To: Moreland, Kenneth
Cc: paraview at paraview.org
Subject: Re: [Paraview] [EXTERNAL]  Decode a vtu file

Dear Kenneth,

Thank you for helping but i didn't mean understanding the text document if that is what you mean.
I mean I want to access the appended data in base 64.

Maybe in command module somehow
(code to show the data)
data ..

Thank you,
Andi

On 14 January 2017 at 03:49, Moreland, Kenneth <kmorel at sandia.gov<mailto:kmorel at sandia.gov>> wrote:
Documentation for vtu file format (and several other standard VTK formats) is here:

http://www.vtk.org/VTK/img/file-formats.pdf

-Ken

From: ParaView [mailto:paraview-bounces at paraview.org<mailto:paraview-bounces at paraview.org>] On Behalf Of Andi Hartarto
Sent: Thursday, January 12, 2017 7:54 PM
To: paraview at paraview.org<mailto:paraview at paraview.org>
Subject: [EXTERNAL] [Paraview] Decode a vtu file

Hello all,

Can I please have guidance/help in decoding a vtu file?

My file is a
<?xml version="1.0"?>
<VTKFile type="UnstructuredGrid" version="0.1" byte_order="LittleEndian" compressor="vtkZLibDataCompressor">
  <UnstructuredGrid>
    <Piece NumberOfPoints="116"                  NumberOfCells="1052"                >
      <PointData>
      </PointData>
      <CellData>
        <DataArray type="Int32" Name="TetrahedraRank" format="appended" RangeMin="1"                    RangeMax="2"                    offset="0"                   />
        <DataArray type="Int32" Name="TetrahedraNo" format="appended" RangeMin="0"                    RangeMax="262"                  offset="188"                 />
      </CellData>
      <Points>
        <DataArray type="Float32" Name="Points" NumberOfComponents="3" format="appended" RangeMin="2003013.3465"         RangeMax="2003224.1668"         offset="812"                 />
      </Points>
      <Cells>
        <DataArray type="Int64" Name="connectivity" format="appended" RangeMin=""                     RangeMax=""                     offset="1680"                />
        <DataArray type="Int64" Name="offsets" format="appended" RangeMin=""                     RangeMax=""                     offset="5892"                />
        <DataArray type="UInt8" Name="types" format="appended" RangeMin=""                     RangeMax=""                     offset="8116"                />
      </Cells>
    </Piece>
  </UnstructuredGrid>
  <AppendedData encoding="base64">
  (data long list)

The file can be found in this link:
https://drive.google.com/open?id=0BzmZiSDoM7l3U2poYWNTbUhBWVU

I don't understand how to decode a vtk file and couldn't find anything in google. I've tried using some scripts in python for base64 but it didn't work..

The reason why I need to decode this is because somehow this vtk file which load in paraview perfectly becomes a 2d file in another software "MOOSE" .. So I think somehow in the encoded data is telling the other software "only display the 2D intersection of blocks". But I want a 3D cube not a 2D surface. If someone knows about this please tell me .

Thank you,
Andi