Function GetSubRange

Common/Core/vtkDataArrayTupleRange_AOS.h:878–937

// Tuple range
template <typename ValueType, ComponentIdType TupleSize>
struct TupleRange<vtkAOSDataArrayTemplate<ValueType>, TupleSize>
{
  using ArrayType = vtkAOSDataArrayTemplate<ValueType>;
  using APIType = GetAPIType<ArrayType>;

private:
  static_assert(IsValidTupleSize<TupleSize>::value, "Invalid tuple size.");
  static_assert(IsVtkDataArray<ArrayType>::value, "Invalid array type.");

  using NumCompsType = GenericTupleSize<TupleSize>;

public:
  using TupleIteratorType = TupleIterator<ArrayType, TupleSize>;
  using ConstTupleIteratorType = ConstTupleIterator<ArrayType, TupleSize>;
  using TupleReferenceType = TupleReference<ArrayType, TupleSize>;
  using ConstTupleReferenceType = ConstTupleReference<ArrayType, TupleSize>;
  using ComponentIteratorType = APIType*;
  using ConstComponentIteratorType = APIType const*;
  using ComponentReferenceType = APIType&;
  using ConstComponentReferenceType = const APIType&;
  using ComponentType = APIType;

  using size_type = TupleIdType;
  using iterator = TupleIteratorType;
  using const_iterator = ConstTupleIteratorType;
  using reference = TupleReferenceType;
  using const_reference = ConstTupleReferenceType;

  // May be DynamicTupleSize, or the actual tuple size.
  constexpr static ComponentIdType TupleSizeTag = TupleSize;

  VTK_ITER_INLINE
  TupleRange() noexcept = default;

  VTK_ITER_INLINE
  TupleRange(ArrayType* arr, TupleIdType beginTuple, TupleIdType endTuple) noexcept
    : Array(arr)
    , NumComps(arr)
    , BeginTuple(beginTuple)
    , EndTuple(endTuple)
  {
    assert(this->Array);
    assert(beginTuple >= 0 && beginTuple <= endTuple);
    assert(endTuple >= 0 && endTuple <= this->Array->GetNumberOfTuples());
    if constexpr (IsStaticTupleSize<TupleSize>::value)
    {
      assert(arr->GetNumberOfComponents() == TupleSize);
    }
  }

  VTK_ITER_INLINE
  TupleRange GetSubRange(TupleIdType beginTuple = 0, TupleIdType endTuple = -1) const noexcept
  {
    const TupleIdType curBegin = this->GetTupleId(this->GetTuplePointer(this->BeginTuple));
    const TupleIdType realBegin = curBegin + beginTuple;
    const TupleIdType realEnd =
      endTuple >= 0 ? curBegin + endTuple : this->GetTupleId(this->GetTuplePointer(this->EndTuple));