Method ReadPieceData

IO/XML/vtkXMLUnstructuredDataReader.cxx:455–523

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//------------------------------------------------------------------------------
int vtkXMLUnstructuredDataReader::ReadPieceData()
{
  // The amount of data read by the superclass's ReadPieceData comes
  // from point/cell data (we read point specifications here).
  vtkIdType superclassPieceSize =
    (this->NumberOfPointArrays * this->GetNumberOfPointsInPiece(this->Piece) +
      this->NumberOfCellArrays * this->GetNumberOfCellsInPiece(this->Piece));

  // Total amount of data in this piece comes from point/cell data
  // arrays and the point specifications themselves.
  vtkIdType totalPieceSize = superclassPieceSize + 1 * this->GetNumberOfPointsInPiece(this->Piece);
  if (totalPieceSize == 0)
  {
    totalPieceSize = 1;
  }

  // Split the progress range based on the approximate fraction of
  // data that will be read by each step in this method.
  float progressRange[2] = { 0, 0 };
  this->GetProgressRange(progressRange);
  float fractions[3] = { 0, float(superclassPieceSize) / totalPieceSize, 1 };

  // Set the range of progress for the superclass.
  this->SetProgressRange(progressRange, 0, fractions);

  // Let the superclass read its data.
  if (!this->Superclass::ReadPieceData())
  {
    return 0;
  }

  vtkPointSet* output = vtkPointSet::SafeDownCast(this->GetCurrentOutput());

  // Set the range of progress for the Points.
  this->SetProgressRange(progressRange, 1, fractions);

  // Read the points array.
  vtkXMLDataElement* ePoints = this->PointElements[this->Piece];
  if (ePoints)
  {
    for (int i = 0; (i < ePoints->GetNumberOfNestedElements() && !this->AbortExecute); ++i)
    {
      vtkXMLDataElement* eNested = ePoints->GetNestedElement(i);
      if (strcmp(eNested->GetName(), "DataArray") != 0 && strcmp(eNested->GetName(), "Array") != 0)
      {
        vtkErrorMacro("Invalid Array.");
        this->DataError = 1;
        return 0;
      }
      int needToRead = this->PointsNeedToReadTimeStep(eNested);
      if (needToRead)
      {
        // Read the array. Test for abort before and after the read. Before
        // so that we can skip the read, after to prevent unwanted error
        // messages.
        if (!this->AbortExecute &&
          !this->ReadArrayForPoints(eNested, output->GetPoints()->GetData()) && !this->AbortExecute)
        {