Method ReadVariableArray

IO/EnSight/vtkEnSightGoldBinaryReader.cxx:1575–1691

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

//------------------------------------------------------------------------------
bool vtkEnSightGoldBinaryReader::ReadVariableArray(const char* description,
  vtkMultiBlockDataSet* compositeOutput, int attributeType, int numComponents,
  int component /*=-1*/)
{
  char line[80];

  // read description.
  this->ReadLine(line);

  auto advance = [&line, this]()
  {
    this->GoldIFile->peek();
    return this->GoldIFile->eof() ? 0 : this->ReadLine(line);
  };

  int lineRead = this->ReadLine(line); // "part".
  while (lineRead && strncmp(line, "part", 4) == 0)
  {
    int partId;
    this->ReadPartId(&partId);
    partId--; // EnSight starts #ing with 1.
    const int realId = this->InsertNewPartId(partId);
    auto output = this->GetDataSetFromBlock(compositeOutput, realId);

    // "part" line can be followed by section identifier "block" or
    // "coordinates" (for nodal data) or "element" (for element data).
    // If the part has zero elements, it may or may not be followed by this section
    // identifier.
    const auto numElements = output->GetNumberOfElements(attributeType);

    lineRead = this->ReadLine(line); // "coordinates", "block", "element" or next "part"
    if (lineRead && strncmp(line, "part", 4) == 0)
    {
      // Part number was not followed by "coordinates" or "block"; we are
      // at the start of another part, skip to next iteration/part to avoid
      // reading anything more.
      continue;
    }

    if (numElements <= 0)
    {
      lineRead = advance();
      continue;
    }

    auto dsa = output->GetAttributes(attributeType);
    vtkSmartPointer<vtkFloatArray> array;

    // For element data (aka cell-data), "part" may be followed by "[element
    // type]" in which case the data is read in chunks rather than a whole.
    if (attributeType != vtkDataObject::CELL || strncmp(line, "block", 5) == 0)
    {
      // read full data.
      array = vtkUtilities::ReadVariableFloats(
        line, this, description, dsa, numElements, numComponents, component);

      lineRead = advance();
    }