Method MatchLocationToRoadGraph

libs/routing/routing_session.cpp:603–646

}

void RoutingSession::MatchLocationToRoadGraph(location::GpsInfo & location)
{
  auto const locationMerc = mercator::FromLatLon(location.m_latitude, location.m_longitude);
  double const radius = m_route->GetCurrentRoutingSettings().m_matchingThresholdM;

  m2::PointD const direction = m_positionAccumulator.GetDirection();

  static auto constexpr kEps = 1e-5;
  if (AlmostEqualAbs(direction, m2::PointD::Zero(), kEps))
    return;

  EdgeProj proj;
  if (!m_router->FindClosestProjectionToRoad(locationMerc, direction, radius, proj))
  {
    m_projectedToRoadGraph = false;
    return;
  }

  // First matching to the same road. We pull coordinates and angle on the following matchings.
  if (!m_projectedToRoadGraph)
  {
    m_projectedToRoadGraph = true;
    m_proj = proj;
    return;
  }

  if (m_proj.m_edge.GetFeatureId() == proj.m_edge.GetFeatureId())
  {
    if (m_route->GetCurrentRoutingSettings().m_matchRoute)
    {
      if (!AlmostEqualAbs(m_proj.m_point, proj.m_point, kEps))
        location.m_bearing = location::AngleToBearing(math::RadToDeg(ang::AngleTo(m_proj.m_point, proj.m_point)));
    }

    location.m_latitude = mercator::YToLat(proj.m_point.y);
    location.m_longitude = mercator::XToLon(proj.m_point.x);
  }
  else
  {
    m_projectedToRoadGraph = false;
  }

  m_proj = proj;
}

bool RoutingSession::MatchLocationToRoute(location::GpsInfo & location, location::RouteMatchingInfo & routeMatchingInfo)
{