Method RequestData

Filters/Generic/vtkGenericProbeFilter.cxx:79–216

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

//------------------------------------------------------------------------------
int vtkGenericProbeFilter::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  // get the info objects
  vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation* sourceInfo = inputVector[1]->GetInformationObject(0);
  vtkInformation* outInfo = outputVector->GetInformationObject(0);

  // get the input and output
  vtkDataSet* input = vtkDataSet::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));
  vtkDataSet* output = vtkDataSet::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkGenericDataSet* source =
    vtkGenericDataSet::SafeDownCast(sourceInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkIdType ptId, numPts;
  double x[3], tol2;
  int subId;

  double pcoords[3];

  vtkDebugMacro(<< "Probing data");

  if (source == nullptr)
  {
    vtkErrorMacro(<< "Source is nullptr.");
    return 1;
  }

  // First, copy the input to the output as a starting point
  output->CopyStructure(input);

  numPts = input->GetNumberOfPoints();
  this->ValidPoints->Allocate(numPts);

  vtkPointData* outputPD = output->GetPointData();
  vtkCellData* outputCD = output->GetCellData();

  // prepare the output attributes
  vtkGenericAttributeCollection* attributes = source->GetAttributes();
  vtkGenericAttribute* attribute;
  vtkDataArray* attributeArray;

  int c = attributes->GetNumberOfAttributes();
  vtkDataSetAttributes* dsAttributes;

  int attributeType;

  double* tuples = new double[attributes->GetMaxNumberOfComponents()];

  for (int i = 0; i < c; ++i)
  {
    attribute = attributes->GetAttribute(i);
    attributeType = attribute->GetType();
    if (attribute->GetCentering() == vtkPointCentered)
    {
      dsAttributes = outputPD;
    }