Class CountryPolygons

generator/borders.hpp:43–94

using PolygonsTree = m4::Tree<Polygon>;

class CountryPolygons
{
public:
  CountryPolygons() = default;
  explicit CountryPolygons(std::string && name, PolygonsTree && regions)
    : m_name(std::move(name))
    , m_polygons(std::move(regions))
  {}

  std::string const & GetName() const { return m_name; }
  bool IsEmpty() const { return m_polygons.IsEmpty(); }
  void Clear()
  {
    m_polygons.Clear();
    m_name.clear();
  }

  class ContainsCompareFn
  {
    double m_eps, m_squareEps;

  public:
    explicit ContainsCompareFn(double eps) : m_eps(eps), m_squareEps(eps * eps) {}
    bool EqualPoints(m2::PointD const & p1, m2::PointD const & p2) const
    {
      return AlmostEqualAbs(p1.x, p2.x, m_eps) && AlmostEqualAbs(p1.y, p2.y, m_eps);
    }
    bool EqualZeroSquarePrecision(double val) const { return AlmostEqualAbs(val, 0.0, m_squareEps); }
  };

  static double GetContainsEpsilon() { return 1.0E-4; }

  bool Contains(m2::PointD const & point) const;

  template <typename Do>
  void ForEachPolygon(Do && fn) const
  {
    m_polygons.ForEach(std::forward<Do>(fn));
  }

  template <typename Do>
  bool ForAnyPolygon(Do && fn) const
  {
    return m_polygons.ForAny(std::forward<Do>(fn));
  }

private:
  std::string m_name;

  /// @todo Is it an overkill to store Tree4D for each country's polygon?
  PolygonsTree m_polygons;
};

class CountryPolygonsCollection
{