Function SquaredNorm

Common/Core/vtkMath.h:582–585

   */
  template <typename ReturnTypeT = double, typename TupleRangeT>
  static ReturnTypeT SquaredNorm(const TupleRangeT& v)
  {
    return v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
  }

  /**
   * Normalize (in place) a 3-vector. Returns norm of vector.