ftypes::HighwayClass GetOutgoingHighwayClass(NodeID outgoingNode,
RoutingMapping const & routingMapping,
Index const & index)
{
OsrmMappingTypes::FtSeg const seg =
GetSegment(outgoingNode, routingMapping, GetFirstSegmentPointIndex);
if (!seg.IsValid())
return ftypes::HighwayClass::Error;
Index::FeaturesLoaderGuard loader(index, routingMapping.GetMwmId());
FeatureType ft;
loader.GetFeatureByIndex(seg.m_fid, ft);
return ftypes::GetHighwayClass(ft);
}
void FindGraphNodeOffsets(uint32_t const nodeId, m2::PointD const & point,
Index const * pIndex, TRoutingMappingPtr & mapping,
FeatureGraphNode & graphNode)
{
graphNode.segmentPoint = point;
helpers::Point2PhantomNode::Candidate best;
auto range = mapping->m_segMapping.GetSegmentsRange(nodeId);
for (size_t i = range.first; i < range.second; ++i)
{
OsrmMappingTypes::FtSeg s;
mapping->m_segMapping.GetSegmentByIndex(i, s);
if (!s.IsValid())
continue;
FeatureType ft;
Index::FeaturesLoaderGuard loader(*pIndex, mapping->GetMwmId());
loader.GetFeatureByIndex(s.m_fid, ft);
helpers::Point2PhantomNode::Candidate mappedSeg;
helpers::Point2PhantomNode::FindNearestSegment(ft, point, mappedSeg);
OsrmMappingTypes::FtSeg seg;
seg.m_fid = mappedSeg.m_fid;
seg.m_pointStart = mappedSeg.m_segIdx;
seg.m_pointEnd = mappedSeg.m_segIdx + 1;
if (!s.IsIntersect(seg))
continue;
if (mappedSeg.m_dist < best.m_dist)
best = mappedSeg;
}
CHECK_NOT_EQUAL(best.m_fid, kInvalidFid, ());
graphNode.segment.m_fid = best.m_fid;
graphNode.segment.m_pointStart = best.m_segIdx;
graphNode.segment.m_pointEnd = best.m_segIdx + 1;
}
void Point2PhantomNode::CalculateWeight(OsrmMappingTypes::FtSeg const & seg,
m2::PointD const & segPt, NodeID const & nodeId,
bool calcFromRight, int & weight, int & offset) const
{
// nodeId can be INVALID_NODE_ID when reverse node is absent. This node has no weight.
if (nodeId == INVALID_NODE_ID)
{
offset = 0;
weight = 0;
return;
}
Index::FeaturesLoaderGuard loader(m_index, m_routingMapping.GetMwmId());
// Offset is measured in milliseconds. We don't know about speed restrictions on the road.
// So we find it by a whole edge weight.
// Distance from the node border to the projection point is in meters.
double distanceM = 0.;
// Whole node distance in meters.
double fullDistanceM = 0.;
// Minimal OSRM edge weight in milliseconds.
EdgeWeight minWeight = 0;
auto const range = m_routingMapping.m_segMapping.GetSegmentsRange(nodeId);
OsrmMappingTypes::FtSeg segment;
size_t const startIndex = calcFromRight ? range.second - 1 : range.first;
size_t const endIndex = calcFromRight ? range.first - 1 : range.second;
int const indexIncrement = calcFromRight ? -1 : 1;
bool foundSeg = false;
m2::PointD lastPoint;
for (size_t segmentIndex = startIndex; segmentIndex != endIndex; segmentIndex += indexIncrement)
{
m_routingMapping.m_segMapping.GetSegmentByIndex(segmentIndex, segment);
if (!segment.IsValid())
continue;
FeatureType ft;
loader.GetFeatureByIndex(segment.m_fid, ft);
ft.ParseGeometry(FeatureType::BEST_GEOMETRY);
// Find whole edge weight by node outgoing point.
if (segmentIndex == range.second - 1)
minWeight = GetMinNodeWeight(nodeId, ft.GetPoint(segment.m_pointEnd));
// Calculate distances.
double distance = CalculateDistance(ft, segment.m_pointStart, segment.m_pointEnd);
fullDistanceM += distance;
if (foundSeg)
continue;
if (segment.m_fid == seg.m_fid && OsrmMappingTypes::IsInside(segment, seg))
{
auto const splittedSegment = OsrmMappingTypes::SplitSegment(segment, seg, !calcFromRight);
distanceM += CalculateDistance(ft, splittedSegment.m_pointStart, splittedSegment.m_pointEnd);
// node.m_seg always forward ordered (m_pointStart < m_pointEnd)
distanceM -= MercatorBounds::DistanceOnEarth(
ft.GetPoint(calcFromRight ? seg.m_pointStart : seg.m_pointEnd), segPt);
foundSeg = true;
}
else
{
distanceM += distance;
}
}
ASSERT_GREATER(fullDistanceM, 0, ("No valid segments on the edge."));
double const ratio = (fullDistanceM == 0) ? 0 : distanceM / fullDistanceM;
ASSERT_LESS_OR_EQUAL(ratio, 1., ());
// OSRM calculates edge weight form start to user point how offset + weight.
// But it doesn't place info about start and end edge result weight into result structure.
// So we store whole edge weight into offset and calculates this weights at a postprocessing step.
offset = minWeight;
weight = max(static_cast<int>(minWeight * ratio), 0) - minWeight;
}