Method ComputeScalarRange

Common/DataModel/vtkImageData.cxx:1836–1888

------------------------------------------------------------------------------ Override this method because of blanking

//------------------------------------------------------------------------------
// Override this method because of blanking
void vtkImageData::ComputeScalarRange()
{
  if (this->GetMTime() > this->ScalarRangeComputeTime)
  {
    vtkDataArray* ptScalars = this->PointData->GetScalars();
    vtkDataArray* cellScalars = this->CellData->GetScalars();
    double ptRange[2];
    double cellRange[2];
    double s;

    ptRange[0] = VTK_DOUBLE_MAX;
    ptRange[1] = VTK_DOUBLE_MIN;
    if (ptScalars)
    {
      vtkIdType num = this->GetNumberOfPoints();
      for (vtkIdType id = 0; id < num; ++id)
      {
        if (this->IsPointVisible(id))
        {
          s = ptScalars->GetComponent(id, 0);
          if (!std::isnan(s))
          {
            ptRange[0] = std::min(s, ptRange[0]);
            ptRange[1] = std::max(s, ptRange[1]);
          }
        }
      }
    }

    cellRange[0] = ptRange[0];
    cellRange[1] = ptRange[1];
    if (cellScalars)
    {
      vtkIdType num = this->GetNumberOfCells();
      for (vtkIdType id = 0; id < num; ++id)
      {
        if (this->IsCellVisible(id))
        {
          s = cellScalars->GetComponent(id, 0);
          if (!std::isnan(s))
          {
            cellRange[0] = std::min(s, cellRange[0]);
            cellRange[1] = std::max(s, cellRange[1]);
          }
        }
      }
    }

    this->ScalarRange[0] = (cellRange[0] >= VTK_DOUBLE_MAX ? 0.0 : cellRange[0]);
    this->ScalarRange[1] = (cellRange[1] <= VTK_DOUBLE_MIN ? 1.0 : cellRange[1]);
    this->ScalarRangeComputeTime.Modified();
  }
}

VTK_ABI_NAMESPACE_END