Method ProcessAreaAndPointStyle

libs/drape_frontend/rule_drawer.cpp:262–335

}

void RuleDrawer::ProcessAreaAndPointStyle(FeatureType & f, Stylist const & s, TInsertShapeFn const & insertShape)
{
  bool isBuilding = false;
  bool is3dBuilding = false;
  bool isBuildingOutline = false;
  if (f.GetLayer() >= 0)
  {
    feature::TypesHolder const types(f);
    using namespace ftypes;

    bool const hasParts =
        IsBuildingHasPartsChecker::Instance()(types);  // possible to do this checks beforehand in stylist?
    bool const isPart = IsBuildingPartChecker::Instance()(types);

    // Looks like nonsense, but there are some osm objects with types
    // highway-path-bridge and building (sic!) at the same time (pedestrian crossing).
    isBuilding = (isPart || IsBuildingChecker::Instance()(types)) && !IsBridgeOrTunnelChecker::Instance()(types);

    isBuildingOutline = isBuilding && hasParts && !isPart;
    is3dBuilding = isBuilding && !isBuildingOutline && m_context->Is3dBuildingsEnabled();
  }

  m2::PointD featureCenter;

  float areaHeight = 0.0f;
  float areaMinHeight = 0.0f;
  if (is3dBuilding)
  {
    double const heightInMeters = GetBuildingHeightInMeters(f);
    double const minHeightInMeters = GetBuildingMinHeightInMeters(f);
    // Loads geometry of the feature.
    featureCenter = feature::GetCenter(f, m_zoomLevel);
    double const lon = mercator::XToLon(featureCenter.x);
    double const lat = mercator::YToLat(featureCenter.y);

    m2::RectD rectMercator = mercator::MetersToXY(lon, lat, heightInMeters);
    areaHeight = static_cast<float>((rectMercator.SizeX() + rectMercator.SizeY()) * 0.5);

    rectMercator = mercator::MetersToXY(lon, lat, minHeightInMeters);
    areaMinHeight = static_cast<float>((rectMercator.SizeX() + rectMercator.SizeY()) * 0.5);
  }

  bool applyPointStyle = s.m_symbolRule || s.m_captionRule || s.m_houseNumberRule;
  if (applyPointStyle)
  {
    if (!is3dBuilding)
    {
      // Loads geometry of the feature.
      featureCenter = feature::GetCenter(f, m_zoomLevel);
    }
    applyPointStyle = m_globalRect.IsPointInside(featureCenter);
  }

  bool const skipTriangles = isBuildingOutline && m_context->Is3dBuildingsEnabled();
  if (!skipTriangles && isBuilding && f.GetTrgVerticesCount(m_zoomLevel) >= 10000)
    isBuilding = false;

  ApplyAreaFeature apply(m_context->GetTileKey(), insertShape, f, m_currentScaleGtoP, isBuilding,