Method CreateLabels

Rendering/Core/vtkLabeledContourMapper.cxx:787–827

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//------------------------------------------------------------------------------
bool vtkLabeledContourMapper::CreateLabels(vtkActor*)
{
  typedef std::vector<LabelMetric> MetricVector;
  typedef std::vector<LabelInfo> InfoVector;

  std::vector<InfoVector>::const_iterator outerLabels = this->Internal->LabelInfos.begin();
  std::vector<InfoVector>::const_iterator outerLabelsEnd = this->Internal->LabelInfos.end();

  // count the number of labels:
  vtkIdType numLabels = 0;
  while (outerLabels != outerLabelsEnd)
  {
    numLabels += static_cast<vtkIdType>((outerLabels++)->size());
  }

  if (!this->AllocateTextActors(numLabels))
  {
    vtkErrorMacro(<< "Error while allocating text actors.");
    return false;
  }

  outerLabels = this->Internal->LabelInfos.begin();
  MetricVector::const_iterator metrics = this->Internal->LabelMetrics.begin();
  MetricVector::const_iterator metricsEnd = this->Internal->LabelMetrics.end();
  vtkTextActor3D** actor = this->TextActors;
  vtkTextActor3D** actorEnd = this->TextActors + this->NumberOfUsedTextActors;

  while (metrics != metricsEnd && outerLabels != outerLabelsEnd && actor != actorEnd)
  {
    for (InfoVector::const_iterator label = outerLabels->begin(), labelEnd = outerLabels->end();
         label != labelEnd; ++label)
    {
      this->Internal->BuildLabel(*actor, *metrics, *label);
      ++actor;
    }
    ++metrics;
    ++outerLabels;
  }

  return true;
}

//------------------------------------------------------------------------------
bool vtkLabeledContourMapper::ApplyStencil(vtkRenderer*, vtkActor*)