Method ReadPieceData

IO/XML/vtkXMLPolyDataReader.cxx:261–386

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//------------------------------------------------------------------------------
int vtkXMLPolyDataReader::ReadPieceData()
{
  // The amount of data read by the superclass's ReadPieceData comes
  // from point/cell data and point specifications (we read cell
  // specifications here).
  vtkIdType superclassPieceSize =
    ((this->NumberOfPointArrays + 1) * 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/cell specifications themselves (cell
  // specifications for vtkPolyData take two data arrays split across
  // cell types).
  vtkIdType totalPieceSize = superclassPieceSize + 2 * this->GetNumberOfCellsInPiece(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.f, 0.f };
  this->GetProgressRange(progressRange);
  float fractions[6] = { 0, static_cast<float>(superclassPieceSize) / totalPieceSize,
    (static_cast<float>(superclassPieceSize) + this->NumberOfVerts[this->Piece]) / totalPieceSize,
    (static_cast<float>(superclassPieceSize) + this->NumberOfVerts[this->Piece] +
      this->NumberOfLines[this->Piece]) /
      totalPieceSize,
    (static_cast<float>(superclassPieceSize) + this->NumberOfVerts[this->Piece] +
      this->NumberOfLines[this->Piece] + this->NumberOfStrips[this->Piece]) /
      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;
  }

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

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

  // Read the Verts.
  vtkXMLDataElement* eVerts = this->VertElements[this->Piece];
  if (eVerts)
  {
    //    int needToRead = this->CellsNeedToReadTimeStep(eNested,
    //      this->VertsTimeStep, this->VertsOffset);
    //    if (needToRead)
    {
      // Read the array.
      if (!this->ReadCellArray(
            this->NumberOfVerts[this->Piece], this->TotalNumberOfVerts, eVerts, output->GetVerts()))