Method GetAbstractScalars

Rendering/Core/vtkAbstractMapper.cxx:152–228

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//------------------------------------------------------------------------------
vtkAbstractArray* vtkAbstractMapper::GetAbstractScalars(vtkDataSet* input, int scalarMode,
  int arrayAccessMode, int arrayId, const char* arrayName, int& cellFlag)
{
  vtkAbstractArray* scalars = nullptr;
  vtkPointData* pd;
  vtkCellData* cd;
  vtkFieldData* fd;

  // make sure we have an input
  if (!input)
  {
    return nullptr;
  }

  // get and scalar data according to scalar mode
  if (scalarMode == VTK_SCALAR_MODE_DEFAULT)
  {
    scalars = input->GetPointData()->GetScalars();
    cellFlag = 0;
    if (!scalars)
    {
      scalars = input->GetCellData()->GetScalars();
      cellFlag = 1;
    }
  }
  else if (scalarMode == VTK_SCALAR_MODE_USE_POINT_DATA)
  {
    scalars = input->GetPointData()->GetScalars();
    cellFlag = 0;
  }
  else if (scalarMode == VTK_SCALAR_MODE_USE_CELL_DATA)
  {
    scalars = input->GetCellData()->GetScalars();
    cellFlag = 1;
  }
  else if (scalarMode == VTK_SCALAR_MODE_USE_POINT_FIELD_DATA)
  {
    pd = input->GetPointData();
    if (arrayAccessMode == VTK_GET_ARRAY_BY_ID)
    {
      scalars = pd->GetAbstractArray(arrayId);
    }
    else
    {
      scalars = pd->GetAbstractArray(arrayName);
    }
    cellFlag = 0;
  }
  else if (scalarMode == VTK_SCALAR_MODE_USE_CELL_FIELD_DATA)
  {
    cd = input->GetCellData();
    if (arrayAccessMode == VTK_GET_ARRAY_BY_ID)
    {
      scalars = cd->GetAbstractArray(arrayId);
    }
    else
    {
      scalars = cd->GetAbstractArray(arrayName);