Method GenerateCellData

Filters/General/vtkRandomAttributeGenerator.cxx:495–573

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//------------------------------------------------------------------------------
void vtkRandomAttributeGenerator::GenerateCellData(vtkCellData* outputCD, vtkIdType numCells)
{
  if (this->GenerateCellScalars)
  {
    vtkDataArray* cellScalars =
      this->GenerateData(this->DataType, numCells, this->NumberOfComponents, 0,
        this->NumberOfComponents - 1, this->MinimumComponentValue, this->MaximumComponentValue);
    const char* scalarsName = "RandomCellScalars";
    cellScalars->SetName(scalarsName);
    outputCD->AddArray(cellScalars);
    outputCD->SetActiveScalars(scalarsName);
    cellScalars->Delete();
  }
  if (this->GenerateCellVectors)
  {
    vtkDataArray* cellVectors = this->GenerateData(
      this->DataType, numCells, 3, 0, 2, this->MinimumComponentValue, this->MaximumComponentValue);
    const char* vectorsName = "RandomCellVectors";
    cellVectors->SetName(vectorsName);
    outputCD->AddArray(cellVectors);
    outputCD->SetActiveVectors(vectorsName);
    cellVectors->Delete();
  }
  if (this->GenerateCellNormals)
  {
    vtkDataArray* cellNormals = this->GenerateData(
      this->DataType, numCells, 3, 0, 2, this->MinimumComponentValue, this->MaximumComponentValue);
    double v[3];
    for (vtkIdType id = 0; id < numCells; id++)
    {
      cellNormals->GetTuple(id, v);
      vtkMath::Normalize(v);
      cellNormals->SetTuple(id, v);
    }
    const char* normalsName = "RandomCellNormals";
    cellNormals->SetName(normalsName);
    outputCD->AddArray(cellNormals);
    outputCD->SetActiveNormals(normalsName);
    cellNormals->Delete();
  }
  if (this->GenerateCellTensors)
  {
    vtkDataArray* cellTensors = this->GenerateData(
      this->DataType, numCells, 9, 0, 5, this->MinimumComponentValue, this->MaximumComponentValue);
    double t[9];
    for (vtkIdType id = 0; id < numCells; id++)
    {
      cellTensors->GetTuple(id, t);
      t[6] = t[1]; // make sure the tensor is symmetric
      t[7] = t[2];
      t[8] = t[4];
      cellTensors->SetTuple(id, t);
    }
    const char* tensorsName = "RandomCellTensors";
    cellTensors->SetName(tensorsName);
    outputCD->AddArray(cellTensors);
    outputCD->SetActiveTensors(tensorsName);
    cellTensors->Delete();