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Use distance functions from many to many

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This commit is contained in:
Patrick Niklaus
2018-04-27 05:00:59 +00:00
committed by Patrick Niklaus
parent a649a8a5cf
commit 89fabc1b9c
5 changed files with 111 additions and 94 deletions
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src/engine/routing_algorithms/many_to_many_ch.cpp
+2 -65
View File
@@ -240,74 +240,11 @@ void calculateDistances(typename SearchEngineData<ch::Algorithm>::ManyToManyQuer
}
if (!packed_leg.empty())
{
auto annotation =
EdgeDistance annotation =
ch::calculateEBGNodeAnnotations(facade, packed_leg.begin(), packed_leg.end());
adjustPathDistanceToPhantomNodes(packed_leg, source_phantom, target_phantom, annotation);
distances_table[row_index * number_of_targets + column_index] = annotation;
// check the direction of travel to figure out how to calculate the offset to/from
// the source/target
if (source_phantom.forward_segment_id.id == packed_leg.front())
{
// ............ <-- calculateEGBAnnotation returns distance from 0 to 3
// -->s <-- subtract offset to start at source
// ......... <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
EdgeDistance offset = source_phantom.GetForwardDistance();
distances_table[row_index * number_of_targets + column_index] -= offset;
}
else if (source_phantom.reverse_segment_id.id == packed_leg.front())
{
// ............ <-- calculateEGBAnnotation returns distance from 0 to 3
// s<------- <-- subtract offset to start at source
// ... <-- want this distance
// entry 0---1---2---3 <-- 3 is exit node
EdgeDistance offset = source_phantom.GetReverseDistance();
distances_table[row_index * number_of_targets + column_index] -= offset;
}
if (target_phantom.forward_segment_id.id == packed_leg.back())
{
// ............ <-- calculateEGBAnnotation returns distance from 0 to 3
// ++>t <-- add offset to get to target
// ................ <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
EdgeDistance offset = target_phantom.GetForwardDistance();
distances_table[row_index * number_of_targets + column_index] += offset;
}
else if (target_phantom.reverse_segment_id.id == packed_leg.back())
{
// ............ <-- calculateEGBAnnotation returns distance from 0 to 3
// <++t <-- add offset to get from target
// ................ <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
EdgeDistance offset = target_phantom.GetReverseDistance();
distances_table[row_index * number_of_targets + column_index] += offset;
}
}
else
{
// there is no shortcut to unpack. source and target are on the same EBG Node.
// if the offset of the target is greater than the offset of the source, subtract it
if (target_phantom.GetForwardDistance() > source_phantom.GetForwardDistance())
{
// --------->t <-- offsets
// ->s <-- subtract source offset from target offset
// ......... <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
EdgeDistance offset =
target_phantom.GetForwardDistance() - source_phantom.GetForwardDistance();
distances_table[row_index * number_of_targets + column_index] = offset;
}
else
{
// s<--- <-- offsets
// t<--------- <-- subtract source offset from target offset
// ...... <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
EdgeDistance offset =
target_phantom.GetReverseDistance() - source_phantom.GetReverseDistance();
distances_table[row_index * number_of_targets + column_index] = offset;
}
}
packed_leg.clear();
}
src/engine/routing_algorithms/routing_base.cpp
+66
View File
@@ -33,6 +33,72 @@ bool needsLoopBackwards(const PhantomNodes &phantoms)
return needsLoopBackwards(phantoms.source_phantom, phantoms.target_phantom);
}
void adjustPathDistanceToPhantomNodes(const std::vector<NodeID> &path,
const PhantomNode &source_phantom,
const PhantomNode &target_phantom,
EdgeDistance &distance)
{
if (!path.empty())
{
// check the direction of travel to figure out how to calculate the offset to/from
// the source/target
if (source_phantom.forward_segment_id.id == path.front())
{
// ............ <-- calculateEGBAnnotation returns distance from 0 to 3
// -->s <-- subtract offset to start at source
// ......... <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
distance -= source_phantom.GetForwardDistance();
}
else if (source_phantom.reverse_segment_id.id == path.front())
{
// ............ <-- calculateEGBAnnotation returns distance from 0 to 3
// s<------- <-- subtract offset to start at source
// ... <-- want this distance
// entry 0---1---2---3 <-- 3 is exit node
distance -= source_phantom.GetReverseDistance();
}
if (target_phantom.forward_segment_id.id == path.back())
{
// ............ <-- calculateEGBAnnotation returns distance from 0 to 3
// ++>t <-- add offset to get to target
// ................ <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
distance += target_phantom.GetForwardDistance();
}
else if (target_phantom.reverse_segment_id.id == path.back())
{
// ............ <-- calculateEGBAnnotation returns distance from 0 to 3
// <++t <-- add offset to get from target
// ................ <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
distance += target_phantom.GetReverseDistance();
}
}
else
{
// there is no shortcut to unpack. source and target are on the same EBG Node.
// if the offset of the target is greater than the offset of the source, subtract it
if (target_phantom.GetForwardDistance() > source_phantom.GetForwardDistance())
{
// --------->t <-- offsets
// ->s <-- subtract source offset from target offset
// ......... <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
distance = target_phantom.GetForwardDistance() - source_phantom.GetForwardDistance();
}
else
{
// s<--- <-- offsets
// t<--------- <-- subtract source offset from target offset
// ...... <-- want this distance as result
// entry 0---1---2---3--- <-- 3 is exit node
distance = target_phantom.GetReverseDistance() - source_phantom.GetReverseDistance();
}
}
}
} // namespace routing_algorithms
} // namespace engine
} // namespace osrm
src/engine/routing_algorithms/routing_base_ch.cpp
+26 -7
View File
@@ -199,14 +199,33 @@ double getNetworkDistance(SearchEngineData<Algorithm> &engine_working_data,
return std::numeric_limits<double>::max();
}
std::vector<PathData> unpacked_path;
unpackPath(facade,
packed_path.begin(),
packed_path.end(),
{source_phantom, target_phantom},
unpacked_path);
BOOST_ASSERT(nodes_number > 0);
return getPathDistance(facade, unpacked_path, source_phantom, target_phantom);
EdgeDistance distance = 0;
std::vector<NodeID> unpacked_nodes;
unpacked_nodes.reserve(packed_path.size());
if (!packed_path.empty())
{
unpacked_nodes.push_back(packed_path.front());
unpackPath(facade,
packed_path.begin(),
packed_path.end(),
[&](std::pair<NodeID, NodeID> &edge, const auto &) {
BOOST_ASSERT(edge.first == unpacked_nodes.back());
unpacked_nodes.push_back(edge.second);
});
for (auto node_iter = unpacked_nodes.begin(); node_iter != std::prev(unpacked_nodes.end());
node_iter++)
{
distance += computeEdgeDistance(facade, *node_iter);
}
}
adjustPathDistanceToPhantomNodes(unpacked_nodes, source_phantom, target_phantom, distance);
return distance / 10.;
}
} // namespace ch