Method ReadPieceData

IO/XML/vtkXMLStructuredGridReader.cxx:149–194

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//------------------------------------------------------------------------------
int vtkXMLStructuredGridReader::ReadPieceData()
{
  // The amount of data read by the superclass's ReadPieceData comes
  // from point/cell data (we read point specifications here).
  int dims[3] = { 0, 0, 0 };
  this->ComputePointDimensions(this->SubExtent, dims);
  vtkIdType superclassPieceSize = (this->NumberOfPointArrays * dims[0] * dims[1] * dims[2] +
    this->NumberOfCellArrays * (dims[0] - 1) * (dims[1] - 1) * (dims[2] - 1));

  // Total amount of data in this piece comes from point/cell data
  // arrays and the point specifications themselves.
  vtkIdType totalPieceSize = superclassPieceSize + dims[0] * dims[1] * dims[2];
  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;
  }

  if (!this->PointElements[this->Piece])
  {
    // Empty volume.
    return 1;
  }

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

  // Read the points array.
  vtkStructuredGrid* output = vtkStructuredGrid::SafeDownCast(this->GetCurrentOutput());
  vtkXMLDataElement* ePoints = this->PointElements[this->Piece];
  return this->ReadArrayForPoints(ePoints->GetNestedElement(0), output->GetPoints()->GetData());
}

int vtkXMLStructuredGridReader::FillOutputPortInformation(int, vtkInformation* info)
{