Method AdjustRange

Rendering/Core/vtkColorTransferFunction.cxx:1898–1958

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

//------------------------------------------------------------------------------
int vtkColorTransferFunction::AdjustRange(double range[2])
{
  if (!range)
  {
    return 0;
  }

  double* function_range = this->GetRange();

  // Make sure we have points at each end of the range

  double rgb[3];
  if (function_range[0] < range[0])
  {
    this->GetColor(range[0], rgb);
    this->AddRGBPoint(range[0], rgb[0], rgb[1], rgb[2]);
  }
  else
  {
    this->GetColor(function_range[0], rgb);
    this->AddRGBPoint(range[0], rgb[0], rgb[1], rgb[2]);
  }

  if (function_range[1] > range[1])
  {
    this->GetColor(range[1], rgb);
    this->AddRGBPoint(range[1], rgb[0], rgb[1], rgb[2]);
  }
  else
  {
    this->GetColor(function_range[1], rgb);
    this->AddRGBPoint(range[1], rgb[0], rgb[1], rgb[2]);
  }

  // Remove all points out-of-range
  int done;

  done = 0;
  while (!done)
  {
    done = 1;

    this->Internal->FindNodeOutOfRange.X1 = range[0];
    this->Internal->FindNodeOutOfRange.X2 = range[1];

    std::vector<vtkCTFNode*>::iterator iter = std::find_if(this->Internal->Nodes.begin(),
      this->Internal->Nodes.end(), this->Internal->FindNodeOutOfRange);

    if (iter != this->Internal->Nodes.end())
    {
      delete *iter;
      this->Internal->Nodes.erase(iter);
      this->Modified();
      done = 0;
    }
  }

  this->SortAndUpdateRange();