Method ProcessPixels

Filters/HyperTree/vtkImageDataToHyperTreeGrid.cxx:179–240

}

void vtkImageDataToHyperTreeGrid::ProcessPixels(
  vtkIntArray* grps, vtkHyperTreeGridNonOrientedCursor* cursor)
{
  int nbPixel = grps->GetNumberOfValues();
  int val = grps->GetTuple1(0);
  bool raf = false;
  for (int i = 0; i < nbPixel && !raf; ++i)
  {
    if (val != grps->GetTuple1(i))
    {
      raf = true;
      break;
    }
  }

  int car = this->NbColors * this->NbColors;
  unsigned char pas = 256 / this->NbColors;

  this->Color->InsertTuple3(this->GlobalId, pas * (unsigned char)((val % car) % this->NbColors),
    pas * (unsigned char)((val % car) / this->NbColors), pas * (unsigned char)(val / car));

  this->Depth->InsertTuple1(this->GlobalId, cursor->GetLevel());

  if (val < 0)
  {
    this->Mask->InsertTuple1(this->GlobalId, true);
  }
  else
  {
    this->Mask->InsertTuple1(this->GlobalId, false);
  }

  cursor->SetGlobalIndexFromLocal(this->GlobalId++);
  if (raf)
  {
    cursor->SubdivideLeaf();
    int ichild = 0;
    for (int j = 0; j < 2; ++j)
    {
      for (int i = 0; i < 2; ++i, ++ichild)
      {
        cursor->ToChild(ichild);

        vtkNew<vtkIntArray> childPix;
        int nbPxl = sqrt(nbPixel) / 2;
        childPix->SetNumberOfValues(nbPxl * nbPxl);
        int id = 0;
        for (int pj = 0; pj < nbPxl; ++pj)
        {
          for (int pi = 0; pi < nbPxl; ++pi, ++id)
          {
            int grp = grps->GetTuple1(i * nbPxl + pi + (j * nbPxl + pj) * 2 * nbPxl);
            childPix->SetValue(id, grp);
          }
        }
        ProcessPixels(childPix, cursor);

        cursor->ToParent();