Method WriteDistributedMetafile

IO/HDF/vtkHDFWriter.cxx:314–353

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkHDFWriter::WriteDistributedMetafile(vtkDataObject* input)
{
  // Only relevant on the last time step
  if (this->IsTemporal && this->CurrentTimeIndex != this->NumberOfTimeSteps - 1)
  {
    return;
  }

  this->Impl->CloseFile();

  // Make sure all processes have written and closed their associated subfile
  this->Controller->Barrier();

  if (this->CurrentPiece == 0)
  {
    this->Impl->CreateFile(this->Overwrite, this->FileName);
    for (int i = 0; i < this->NbPieces; i++)
    {
      const std::string partitionSuffix = "part" + vtk::to_string(i);
      const std::string subFilePath =
        ::GetExternalBlockFileName(std::string(this->FileName), partitionSuffix);
      if (!this->Impl->OpenSubfile(subFilePath))
      {
        vtkErrorMacro(<< "Could not open subfile" << subFilePath);
      }
    }
    this->Impl->SetSubFilesReady(true);
    this->CurrentTimeIndex = 0; // Reset time so that datasets are initialized properly

    /* This is a special writing pass. The dataset will be processed and go through writing
    all datasets for its type, except that write operations will be different:
    instead of writing the data actually associated to the input data object,
    write commands will instead gather information from all previously written distributed
    pieces, and create virtual datasets referencing them. */
    this->DispatchDataObject(this->Impl->GetRoot(), input);
  }

  // Set the time value back to where it was, to stop executing
  this->CurrentTimeIndex = this->NumberOfTimeSteps - 1;
}

//------------------------------------------------------------------------------
void vtkHDFWriter::DispatchDataObject(hid_t group, vtkDataObject* input, unsigned int partId)