permutationcomputation.h

// Copyright (C) 2020 Matthew Scroggs
// Copyright (C) 2020-2026 Matthew Scroggs, Jørgen S. Dokken and Garth N. Wells
//
// This file is part of DOLFINx (https://www.fenicsproject.org)
//
// SPDX-License-Identifier:    LGPL-3.0-or-later
 
#pragma once
 
#include <cstdint>
#include <vector>
 
namespace dolfinx::mesh
{
class Topology;

constexpr std::uint32_t reversed_facet_bit(int f)
{
  return std::uint32_t(1) << (27 + f);
}

constexpr std::uint32_t orientation_mask(int tdim)
{
  if (tdim == 2)
  {
    return reversed_facet_bit(0) | reversed_facet_bit(1) | reversed_facet_bit(2)
           | reversed_facet_bit(3);
  }
  return 0;
}

std::vector<std::uint8_t> compute_entity_permutations(const Topology& topology,
                                                      int dim, int num_threads);

std::vector<std::uint32_t> compute_cell_permutations(const Topology& topology,
                                                     int num_threads);

std::vector<std::uint32_t> compute_facet_orientations(const Topology& topology);
 
} // namespace dolfinx::mesh