impl_utils.hpp

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// --------------------------------------------------------------------------
//
// Copyright (C) 2025-present by Pablo Antolin
//
// This file is part of the QUGaR library.
//
// SPDX-License-Identifier:    MIT
//
// --------------------------------------------------------------------------
 
#ifndef QUGAR_IMPL_UTILS_HPP
#define QUGAR_IMPL_UTILS_HPP
 
 
#include <qugar/domain_function.hpp>
#include <qugar/point.hpp>
#include <qugar/tolerance.hpp>
#include <qugar/types.hpp>
#include <qugar/vector.hpp>
 
#include <utility>
#include <vector>
 
 
namespace qugar::impl {
 
template<int dim>
[[nodiscard]] bool on_levelset(const ImplicitFunc<dim> &phi, const Point<dim> &point, Tolerance tol = Tolerance());
 
template<int dim> [[nodiscard]] int get_facet_constant_dir(int local_facet_id);
 
template<int dim> [[nodiscard]] int get_facet_side(int local_facet_id);
 
template<int dim> [[nodiscard]] int get_local_facet_id(int const_dir, int side);
 
template<int dim> [[nodiscard]] Vector<int, dim - 1> get_edge_constant_dirs(int local_edge_id);
 
template<int dim> [[nodiscard]] Vector<int, dim - 1> get_edge_sides(int local_edge_id);
 
 
template<int dim, int range> class ImplReparamMesh;
 
 
template<int dim> struct RootsIntervals
{
  std::vector<real> roots;
  Point<dim> point;
  std::vector<int> func_ids;
  std::vector<bool> active_intervals;
 
private:
  std::vector<std::pair<real, int>> roots_ids;
 
public:
  RootsIntervals();
 
  void clear();
 
  void add_root(real root, int func_id);
 
  [[nodiscard]] bool empty() const;
 
  [[nodiscard]] int get_num_roots() const;
 
  void sort_roots();
 
  void adjust_roots(const Tolerance &tol, real x0, real x1);
};
}// namespace qugar::impl
 
#endif// QUGAR_IMPL_UTILS_HPP