[Paraview] Providing block names within .vtm files

[Adriano Gagliardi]

Jean,

I had a look at the source too and came to the same conclusion. Admittedly,
I was quite surprised considering it is such a important feature of
multi-block data storage. Thank you for providing code to handle it though.
I'll make changes and test to make sure it works here and update you. 

Thanks,

Adriano

===================================

Adriano Gagliardi MEng PhD
Business Sector Leader
Computational Aerodynamics
Aircraft Research Association Ltd.
Manton Lane
Bedford

Tel: 01234 32 4644
E-mail: agagliardi at ara.co.uk
Url: www.ara.co.uk 
-----Original Message-----
From: Favre Jean [mailto:jfavre at cscs.ch] 
Sent: 25 March 2011 12:05
To: agagliardi at ara.co.uk; paraview at paraview.org
Subject: RE: [Paraview] Providing block names within .vtm files


I believe the functionality is missing. I have looked for it for many years.

I just put together a quick hack, which seems to work fine for me. No
exhaustive testing was done. It works for my test data, which are
multi-blocks of multi-blocks. It could be generalized to multi-pieces too.
I'll let a Kitware guru do that. :-)

I modified VTK/IO/vtkXMLMultiBlockDataReader.cxx to get the attribute "name"

    // child is a leaf node, read and insert.
    const char* tagName = childXML->GetName();
    if (strcmp(tagName, "DataSet") == 0)
      {
      vtkSmartPointer<vtkDataSet> childDS;
      const char* name;
      if (this->ShouldReadDataSet(dataSetIndex))
        {
        // Read
        childDS.TakeReference(this->ReadDataset(childXML, filePath));
        name = childXML->GetAttribute("name");
        }
      // insert
      if (mblock)
        {
        mblock->SetBlock(index, childDS);
        mblock->GetMetaData(index)->Set(vtkCompositeDataSet::NAME(), name);
        }
      else if (mpiece)
        {
        mpiece->SetPiece(index, childDS);
        }
      dataSetIndex++;
      }
    // Child is a multiblock dataset itself. Create it.
    else if (mblock != 0
             && strcmp(tagName, "Block") == 0)
      {
      vtkMultiBlockDataSet* childDS = vtkMultiBlockDataSet::New();;
      this->ReadComposite(childXML, childDS, filePath, dataSetIndex);
      const char* name = childXML->GetAttribute("name");
      if (mblock)
        {
        mblock->SetBlock(index, childDS);
        mblock->GetMetaData(index)->Set(vtkCompositeDataSet::NAME(), name);
        }
      else if (mpiece)
        {
        vtkErrorMacro("Multipiece data can't have composite children.");
        return;
        }
      childDS->Delete();
      }


-----------------
Jean M. Favre
Swiss National Supercomputing Center

=


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