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    <p>Thanks, David! <br>
      Looks like I need to build a 32-bit-ID version of VTK :-)</p>
    <p>Paul</p>
    <br>
    <div class="moz-cite-prefix">On 11/20/2017 11:03 PM, David E DeMarle
      wrote:<br>
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cite="mid:CANjZAi-kBiPsHLSc2obhT5_h6QMNzBcPZDQuFKLF1+zZPH9Reg@mail.gmail.com">
      <div dir="ltr">As for xdmf3, yes the size of the compiled in ID
        type is what determines it.
        <div>
          <div>See<br>
            <div><a
href="https://gitlab.kitware.com/vtk/vtk/blob/master/IO/Xdmf3/vtkXdmf3DataSet.cxx#L372"
                moz-do-not-send="true">https://gitlab.kitware.com/vtk/vtk/blob/master/IO/Xdmf3/vtkXdmf3DataSet.cxx#L372</a><br>
            </div>
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          <div>where we check the size and then give over the pointer.</div>
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                  <div>David E DeMarle<br>
                    Kitware, Inc.<br>
                    Principal Engineer<br>
                    21 Corporate Drive<br>
                    Clifton Park, NY 12065-8662<br>
                    Phone: 518-881-4909</div>
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        <br>
        <div class="gmail_quote">On Thu, Nov 16, 2017 at 4:20 AM, Paul
          Melis <span dir="ltr"><<a
              href="mailto:paul.melis@surfsara.nl" target="_blank"
              moz-do-not-send="true">paul.melis@surfsara.nl</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
            <br>
            Is there a way to specify the integer precision of polydata
            index arrays when using the Xdmf3 writer? For me, it's
            currently writing out indices in 64 bits, which is a bit
            wasteful given the number of vertices:<br>
            <br>
            <?xml version="1.0" encoding="utf-8"?><br>
            <Xdmf xmlns:xi="<a href="http://www.w3.org/2001/XInclude"
              rel="noreferrer" target="_blank" moz-do-not-send="true">http://www.w3.org/20<wbr>01/XInclude</a>"
            Version="3.3"><br>
              <Domain><br>
                <Grid Name="Grid"><br>
                  <Geometry Origin="" Type="XYZ"><br>
                    <DataItem DataType="Float" Dimensions="39010488
            3" Format="HDF" Precision="4">region-rbc-9.h5:<wbr>Data2</DataItem><br>
                  </Geometry><br>
                  <Topology Dimensions="77777920" Type="Mixed"><br>
                    <DataItem DataType="Int" Dimensions="311111680"
            Format="HDF" Precision="8">region-rbc-9.h5:<wbr>Data3</DataItem><br>
                  </Topology><br>
                </Grid><br>
              </Domain><br>
            </Xdmf><br>
            <br>
            Or is the output precision of (most) VTK writers fully
            determined by the compiled-in ID type?<br>
            <br>
            Thanks,<br>
            Paul<br>
            <br>
            -- <br>
            <br>
            Paul Melis<br>
            | Visualization group leader & developer | SURFsara |<br>
            | Science Park 140 | 1098 XG Amsterdam |<br>
            | T 020 800 1312 | <a href="mailto:paul.melis@surfsara.nl"
              target="_blank" moz-do-not-send="true">paul.melis@surfsara.nl</a>
            | <a href="http://www.surfsara.nl" rel="noreferrer"
              target="_blank" moz-do-not-send="true">www.surfsara.nl</a>
            |<br>
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