Method GetFeatureCenter

generator/hierarchy.cpp:168–197

}

std::optional<m2::PointD> HierarchyEntryEnricher::GetFeatureCenter(CompositeId const & id) const
{
  auto const optIds = m_osm2FtIds.GetFeatureIds(id);
  if (optIds.empty())
    return {};

  // A CompositeId id may correspond to several feature ids. These features can be represented by
  // three types of geometry. Logically, their centers coincide, but in practice they don’t,
  // because the centers are calculated differently. For example, for an object with a type area,
  // the area will be computed using the triangles geometry, but for an object with a type line,
  // the area will be computed using the outer geometry of a polygon.
  ankerl::unordered_dense::map<std::underlying_type_t<feature::GeomType>, m2::PointD> m;
  for (auto optId : optIds)
  {
    auto const ftPtr = m_featureGetter.GetFeatureByIndex(optId);
    if (!ftPtr)
      continue;

    CHECK(m.emplace(base::Underlying(ftPtr->GetGeomType()), feature::GetCenter(*ftPtr)).second, (id, optIds));
  }

  for (auto type : {base::Underlying(feature::GeomType::Point), base::Underlying(feature::GeomType::Area),
                    base::Underlying(feature::GeomType::Line)})
  {
    if (m.count(type) != 0)
      return m[type];
  }

  return {};
}

HierarchyLinesBuilder::HierarchyLinesBuilder(HierarchyLinker::Node::Ptrs && trees) : m_trees(std::move(trees)) {}