Method StartPass

Filters/CellGrid/vtkCellGridSampleQuery.cxx:89–156

}

void vtkCellGridSampleQuery::StartPass()
{
  this->Superclass::StartPass();
  if (this->Pass == PassType::GenerateOutputs)
  {
    // Turn OutputOffsets into a cumulative sum.
    vtkIdType next = 0;
    for (auto& entry : this->OutputOffsets)
    {
      vtkIdType curr = next;
      next += entry.second;
      entry.second = curr;
    }
    // Before we allocate table rows, make sure the cell-site array
    // has the proper number of components (or remove it if unused).
    if (this->MaximumParametricDimension)
    {
      if (this->SourceCellSite)
      {
        this->SourceCellSite->SetNumberOfComponents(this->MaximumParametricDimension);
      }
    }
    else
    {
      if (this->SourceCellSite)
      {
        this->Output->RemoveColumnByName("SourceCellSite");
        this->SourceCellSite = nullptr;
      }
    }
    // Allocate table rows.
    this->Output->SetNumberOfRows(next);
    // If we are storing source cell types, populate the array
    // now because it is allocated and we know the offsets.
    if (this->SourceCellType)
    {
      vtkStringToken hash;
      vtkIdType prev = 0;
      for (const auto& entry : this->OutputOffsets)
      {
        if (hash.IsValid() && prev != entry.second)
        {
          vtkSMPTools::For(prev, entry.second,
            [hash, this](vtkIdType begin, vtkIdType end)
            {
              for (vtkIdType ii = begin; ii < end; ++ii)
              {
                this->SourceCellType->SetValue(ii, hash.GetId());
              }
            });
        }
        prev = entry.second;
        hash = entry.first;
      }
      if (prev != next)
      {
        vtkSMPTools::For(prev, next,
          [hash, this](vtkIdType begin, vtkIdType end)