topology.hpp

// Copyright (C) 2025 Tiago V. L. Amorim (@tiagovla)
//
// This file is part of oiseau (https://github.com/tiagovla/oiseau)
//
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
#include <cstddef>
#include <span>
#include <vector>
 
#include "oiseau/mesh/cell.hpp"
 
namespace oiseau::mesh {
 
class Topology {
 public:
  Topology();
  Topology(std::vector<std::vector<std::size_t>> &&conn, std::vector<CellType> &&cell_types);
  Topology(Topology &&) = default;
  Topology(const Topology &) = default;
  Topology &operator=(Topology &&) = default;
  Topology &operator=(const Topology &) = default;
  ~Topology();
  std::span<CellType> cell_types();
  std::span<std::vector<std::size_t>> conn();
  std::span<std::vector<std::size_t>> e_to_e();
  std::span<std::vector<std::size_t>> e_to_f();
  std::size_t n_cells() const;
  void calculate_connectivity();
 
 private:
  std::vector<std::vector<std::size_t>> m_conn;
  std::vector<std::vector<std::size_t>> m_e_to_v;
  std::vector<std::vector<std::size_t>> m_e_to_e;
  std::vector<std::vector<std::size_t>> m_e_to_f;
  std::vector<CellType> m_cell_types;
};
 
}  // namespace oiseau::mesh