Function MergePoints

libs/drape_frontend/read_metaline_task.cpp:103–132

}

std::vector<m2::PointD> MergePoints(ankerl::unordered_dense::map<FeatureID, std::vector<m2::PointD>> && points,
                                    std::vector<FeatureID> const & featuresOrder)
{
  if (points.size() == 1)
    return std::move(points.begin()->second);

  size_t sz = 0;
  for (auto const & p : points)
    sz += p.second.size();

  std::vector<m2::PointD> result;
  result.reserve(sz);
  for (auto const & f : featuresOrder)
  {
    auto const it = points.find(f);
    ASSERT(it != points.cend(), ());

    if (!result.empty())
    {
      auto iBeg = it->second.begin();
      if (result.back().EqualDxDy(*iBeg, kMwmPointAccuracy))
        ++iBeg;
      result.insert(result.end(), iBeg, it->second.end());
    }
    else
      result = std::move(it->second);
  }

  return result;
}
}  // namespace

namespace df