Method ReadXMLData

IO/XML/vtkXMLStructuredDataReader.cxx:211–317

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

//------------------------------------------------------------------------------
void vtkXMLStructuredDataReader::ReadXMLData()
{
  // Get the requested Update Extent.
  vtkInformation* outInfo = this->GetCurrentOutputInformation();
  outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(), this->UpdateExtent);

  // For debugging
  /*
  int numPieces = outInfo->Get(
    vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES());
  int piece = outInfo->Get(
    vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER());
  int numGhosts = outInfo->Get(
    vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS());

  if (piece == 0)
    {
    std::cout << "Piece:" << piece << " " << numPieces << " " << numGhosts << endl;
    std::cout << "Extent: "
         << this->UpdateExtent[0] << " "
         << this->UpdateExtent[1] << " "
         << this->UpdateExtent[2] << " "
         << this->UpdateExtent[3] << " "
         << this->UpdateExtent[4] << " "
         << this->UpdateExtent[5] << endl;
    }
  */

  vtkDebugMacro("Updating extent " << this->UpdateExtent[0] << " " << this->UpdateExtent[1] << " "
                                   << this->UpdateExtent[2] << " " << this->UpdateExtent[3] << " "
                                   << this->UpdateExtent[4] << " " << this->UpdateExtent[5]
                                   << "\n");

  // Prepare increments for the update extent.
  this->ComputePointDimensions(this->UpdateExtent, this->PointDimensions);
  this->ComputePointIncrements(this->UpdateExtent, this->PointIncrements);
  this->ComputeCellDimensions(this->UpdateExtent, this->CellDimensions);
  this->ComputeCellIncrements(this->UpdateExtent, this->CellIncrements);

  // Let superclasses read data.  This also allocates output data.
  this->Superclass::ReadXMLData();

  // Split current progress range based on fraction contributed by
  // each piece.
  float progressRange[2] = { 0.f, 0.f };
  this->GetProgressRange(progressRange);

  // Calculate the cumulative fraction of data contributed by each
  // piece (for progress).
  float* fractions = new float[this->NumberOfPieces + 1];
  fractions[0] = 0;
  for (int i = 0; i < this->NumberOfPieces; ++i)
  {
    int* pieceExtent = this->PieceExtents + i * 6;
    int pieceDims[3] = { 0, 0, 0 };
    // Intersect the extents to get the part we need to read.
    if (this->IntersectExtents(pieceExtent, this->UpdateExtent, this->SubExtent))
    {