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Don't use phantom node pairs as input for distance table

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This commit is contained in:
Patrick Niklaus 2015-12-16 21:54:07 +01:00
parent 648a62112e
commit 0b1c9d33a5
5 changed files with 115 additions and 108 deletions
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23
plugins/distance_table.hpp
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@ -181,11 +181,11 @@ template <class DataFacadeT> class DistanceTablePlugin final : public BasePlugin
BOOST_ASSERT((phantom_node_target_out_iter - phantom_node_target_vector.begin()) ==
number_of_destination);
snapPhantomNodes(phantom_node_source_vector);
snapPhantomNodes(phantom_node_target_vector);
// FIXME we should clear phantom_node_source_vector and phantom_node_target_vector after this
auto snapped_source_phantoms = snapPhantomNodes(phantom_node_source_vector);
auto snapped_target_phantoms = snapPhantomNodes(phantom_node_target_vector);
std::shared_ptr<std::vector<EdgeWeight>> result_table = search_engine_ptr->distance_table(
phantom_node_source_vector, phantom_node_target_vector);
auto result_table = search_engine_ptr->distance_table(snapped_source_phantoms, snapped_target_phantoms);
if (!result_table)
{
@ -203,23 +203,22 @@ template <class DataFacadeT> class DistanceTablePlugin final : public BasePlugin
matrix_json_array.values.push_back(json_row);
}
json_result.values["distance_table"] = matrix_json_array;
osrm::json::Array target_coord_json_array;
for (const auto &pair : phantom_node_target_vector)
for (const auto &phantom : snapped_target_phantoms)
{
osrm::json::Array json_coord;
FixedPointCoordinate coord = pair.first.location;
json_coord.values.push_back(coord.lat / COORDINATE_PRECISION);
json_coord.values.push_back(coord.lon / COORDINATE_PRECISION);
json_coord.values.push_back(phantom.location.lat / COORDINATE_PRECISION);
json_coord.values.push_back(phantom.location.lon / COORDINATE_PRECISION);
target_coord_json_array.values.push_back(json_coord);
}
json_result.values["destination_coordinates"] = target_coord_json_array;
osrm::json::Array source_coord_json_array;
for (const auto &pair : phantom_node_source_vector)
for (const auto &phantom : snapped_source_phantoms)
{
osrm::json::Array json_coord;
FixedPointCoordinate coord = pair.first.location;
json_coord.values.push_back(coord.lat / COORDINATE_PRECISION);
json_coord.values.push_back(coord.lon / COORDINATE_PRECISION);
json_coord.values.push_back(phantom.location.lat / COORDINATE_PRECISION);
json_coord.values.push_back(phantom.location.lon / COORDINATE_PRECISION);
source_coord_json_array.values.push_back(json_coord);
}
json_result.values["source_coordinates"] = source_coord_json_array;

51
plugins/plugin_base.hpp
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@ -46,8 +46,8 @@ class BasePlugin
virtual ~BasePlugin() {}
virtual const std::string GetDescriptor() const = 0;
virtual int HandleRequest(const RouteParameters &, osrm::json::Object &) = 0;
virtual bool
check_all_coordinates(const std::vector<FixedPointCoordinate> &coordinates, const unsigned min = 2) const final
virtual bool check_all_coordinates(const std::vector<FixedPointCoordinate> &coordinates,
const unsigned min = 2) const final
{
if (min > coordinates.size() || std::any_of(std::begin(coordinates), std::end(coordinates),
[](const FixedPointCoordinate &coordinate)
@ -62,16 +62,18 @@ class BasePlugin
// Decides whether to use the phantom node from a big or small component if both are found.
// Returns true if all phantom nodes are in the same component after snapping.
bool snapPhantomNodes(std::vector<std::pair<PhantomNode, PhantomNode>> &phantom_node_pair_list) const
std::vector<PhantomNode> snapPhantomNodes(
const std::vector<std::pair<PhantomNode, PhantomNode>> &phantom_node_pair_list) const
{
const auto check_component_id_is_tiny = [](const std::pair<PhantomNode, PhantomNode> &phantom_pair)
const auto check_component_id_is_tiny =
[](const std::pair<PhantomNode, PhantomNode> &phantom_pair)
{
return phantom_pair.first.component.is_tiny;
};
// are all phantoms from a tiny cc?
const auto check_all_in_same_component = [](const std::vector<std::pair<PhantomNode, PhantomNode>> &nodes)
const auto check_all_in_same_component =
[](const std::vector<std::pair<PhantomNode, PhantomNode>> &nodes)
{
const auto component_id = nodes.front().first.component.id;
@ -82,13 +84,20 @@ class BasePlugin
});
};
const auto swap_phantom_from_big_cc_into_front = [](std::pair<PhantomNode, PhantomNode> &phantom_pair)
const auto fallback_to_big_component =
[](const std::pair<PhantomNode, PhantomNode> &phantom_pair)
{
if (phantom_pair.first.component.is_tiny && phantom_pair.second.is_valid() && !phantom_pair.second.component.is_tiny)
if (phantom_pair.first.component.is_tiny && phantom_pair.second.is_valid() &&
!phantom_pair.second.component.is_tiny)
{
using std::swap;
swap(phantom_pair.first, phantom_pair.second);
return phantom_pair.second;
}
return phantom_pair.first;
};
const auto use_closed_phantom = [](const std::pair<PhantomNode, PhantomNode> &phantom_pair)
{
return phantom_pair.first;
};
const bool every_phantom_is_in_tiny_cc =
@ -96,17 +105,23 @@ class BasePlugin
check_component_id_is_tiny);
auto all_in_same_component = check_all_in_same_component(phantom_node_pair_list);
// The only case we don't snap to the big component if all phantoms are in the same small component
if (!every_phantom_is_in_tiny_cc || !all_in_same_component)
{
std::for_each(std::begin(phantom_node_pair_list), std::end(phantom_node_pair_list),
swap_phantom_from_big_cc_into_front);
std::vector<PhantomNode> snapped_phantoms;
snapped_phantoms.reserve(phantom_node_pair_list.size());
// update check with new component ids
all_in_same_component = check_all_in_same_component(phantom_node_pair_list);
// The only case we don't snap to the big component if all phantoms are in the same small
// component
if (every_phantom_is_in_tiny_cc && all_in_same_component)
{
std::transform(phantom_node_pair_list.begin(), phantom_node_pair_list.end(),
std::back_inserter(snapped_phantoms), use_closed_phantom);
}
else
{
std::transform(phantom_node_pair_list.begin(), phantom_node_pair_list.end(),
std::back_inserter(snapped_phantoms), fallback_to_big_component);
}
return all_in_same_component;
return snapped_phantoms;
}
};

32
plugins/trip.hpp
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@ -72,12 +72,14 @@ template <class DataFacadeT> class RoundTripPlugin final : public BasePlugin
const std::string GetDescriptor() const override final { return descriptor_string; }
void GetPhantomNodes(const RouteParameters &route_parameters,
std::vector<PhantomNodePair> &phantom_node_pair_list)
std::vector<PhantomNode> GetPhantomNodes(const RouteParameters &route_parameters)
{
const bool checksum_OK = (route_parameters.check_sum == facade->GetCheckSum());
const auto &input_bearings = route_parameters.bearings;
std::vector<PhantomNode> phantom_node_list;
phantom_node_list.reserve(route_parameters.coordinates.size());
// find phantom nodes for all input coords
for (const auto i : osrm::irange<std::size_t>(0, route_parameters.coordinates.size()))
{
@ -89,17 +91,17 @@ template <class DataFacadeT> class RoundTripPlugin final : public BasePlugin
ObjectEncoder::DecodeFromBase64(route_parameters.hints[i], current_phantom_node);
if (current_phantom_node.is_valid(facade->GetNumberOfNodes()))
{
phantom_node_pair_list[i] = std::make_pair(current_phantom_node, current_phantom_node);
phantom_node_list.push_back(std::move(current_phantom_node));
continue;
}
}
const int bearing = input_bearings.size() > 0 ? input_bearings[i].first : 0;
const int range = input_bearings.size() > 0 ? (input_bearings[i].second?*input_bearings[i].second:10) : 180;
auto phantom_nodes = facade->NearestPhantomNodes(route_parameters.coordinates[i], 1, bearing, range);
// FIXME we only use the pair because that is what DistanceTable expects
phantom_node_pair_list[i] = std::make_pair(phantom_nodes.front().phantom_node, phantom_nodes.front().phantom_node);
BOOST_ASSERT(phantom_node_pair_list[i].first.is_valid(facade->GetNumberOfNodes()));
phantom_node_list.push_back(facade->NearestPhantomNodes(route_parameters.coordinates[i], 1, bearing, range).front().phantom_node);
BOOST_ASSERT(phantom_node_list.back().is_valid(facade->GetNumberOfNodes()));
}
return phantom_node_list;
}
// Object to hold all strongly connected components (scc) of a graph
@ -203,7 +205,7 @@ template <class DataFacadeT> class RoundTripPlugin final : public BasePlugin
json_result.values["permutation"] = json_permutation;
}
InternalRouteResult ComputeRoute(const std::vector<PhantomNodePair> &phantom_node_pair_list,
InternalRouteResult ComputeRoute(const std::vector<PhantomNode> &phantom_node_list,
const RouteParameters &route_parameters,
const std::vector<NodeID> &trip)
{
@ -220,7 +222,7 @@ template <class DataFacadeT> class RoundTripPlugin final : public BasePlugin
const auto to_node = std::next(it) != end ? *std::next(it) : *start;
viapoint =
PhantomNodes{phantom_node_pair_list[from_node].first, phantom_node_pair_list[to_node].first};
PhantomNodes{phantom_node_list[from_node], phantom_node_list[to_node]};
min_route.segment_end_coordinates.emplace_back(viapoint);
}
BOOST_ASSERT(min_route.segment_end_coordinates.size() == trip.size());
@ -243,24 +245,24 @@ template <class DataFacadeT> class RoundTripPlugin final : public BasePlugin
// check if all inputs are coordinates
if (!check_all_coordinates(route_parameters.coordinates))
{
json_result.values["status_message"] = "Invalid coordinates.";
return 400;
}
const auto &input_bearings = route_parameters.bearings;
if (input_bearings.size() > 0 && route_parameters.coordinates.size() != input_bearings.size())
{
json_result.values["status"] = "Number of bearings does not match number of coordinates .";
json_result.values["status_message"] = "Number of bearings does not match number of coordinates.";
return 400;
}
// get phantom nodes
std::vector<PhantomNodePair> phantom_node_pair_list(route_parameters.coordinates.size());
GetPhantomNodes(route_parameters, phantom_node_pair_list);
const auto number_of_locations = phantom_node_pair_list.size();
auto phantom_node_list = GetPhantomNodes(route_parameters);
const auto number_of_locations = phantom_node_list.size();
// compute the distance table of all phantom nodes
const auto result_table = DistTableWrapper<EdgeWeight>(
*search_engine_ptr->distance_table(phantom_node_pair_list, phantom_node_pair_list), number_of_locations);
*search_engine_ptr->distance_table(phantom_node_list, phantom_node_list), number_of_locations);
if (result_table.size() == 0)
{
@ -328,7 +330,7 @@ template <class DataFacadeT> class RoundTripPlugin final : public BasePlugin
comp_route.reserve(route_result.size());
for (auto &elem : route_result)
{
comp_route.push_back(ComputeRoute(phantom_node_pair_list, route_parameters, elem));
comp_route.push_back(ComputeRoute(phantom_node_list, route_parameters, elem));
}
TIMER_STOP(TRIP_TIMER);

41
plugins/viaroute.hpp
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@ -77,13 +77,16 @@ template <class DataFacadeT> class ViaRoutePlugin final : public BasePlugin
{
if (!check_all_coordinates(route_parameters.coordinates))
{
json_result.values["status_message"] = "Invalid coordinates.";
return 400;
}
const auto &input_bearings = route_parameters.bearings;
if (input_bearings.size() > 0 && route_parameters.coordinates.size() != input_bearings.size())
if (input_bearings.size() > 0 &&
route_parameters.coordinates.size() != input_bearings.size())
{
json_result.values["status"] = "Number of bearings does not match number of coordinates .";
json_result.values["status_message"] =
"Number of bearings does not match number of coordinates.";
return 400;
}
@ -103,28 +106,32 @@ template <class DataFacadeT> class ViaRoutePlugin final : public BasePlugin
}
}
const int bearing = input_bearings.size() > 0 ? input_bearings[i].first : 0;
const int range = input_bearings.size() > 0 ? (input_bearings[i].second?*input_bearings[i].second:10) : 180;
phantom_node_pair_list[i] = facade->NearestPhantomNodeWithAlternativeFromBigComponent(route_parameters.coordinates[i], bearing, range);
const int range = input_bearings.size() > 0
? (input_bearings[i].second ? *input_bearings[i].second : 10)
: 180;
phantom_node_pair_list[i] = facade->NearestPhantomNodeWithAlternativeFromBigComponent(
route_parameters.coordinates[i], bearing, range);
// we didn't found a fitting node, return error
if (!phantom_node_pair_list[i].first.is_valid(facade->GetNumberOfNodes()))
{
json_result.values["status_message"] = std::string("Could not find a matching segment for coordinate ") + std::to_string(i);
json_result.values["status_message"] =
std::string("Could not find a matching segment for coordinate ") +
std::to_string(i);
return 400;
}
BOOST_ASSERT(phantom_node_pair_list[i].first.is_valid(facade->GetNumberOfNodes()));
BOOST_ASSERT(phantom_node_pair_list[i].second.is_valid(facade->GetNumberOfNodes()));
}
auto all_in_same_component = snapPhantomNodes(phantom_node_pair_list);
auto snapped_phantoms = snapPhantomNodes(phantom_node_pair_list);
InternalRouteResult raw_route;
auto build_phantom_pairs =
[&raw_route](const PhantomNodePair &first_pair, const PhantomNodePair &second_pair)
auto build_phantom_pairs = [&raw_route](const PhantomNode &first_node,
const PhantomNode &second_node)
{
raw_route.segment_end_coordinates.emplace_back(
PhantomNodes{first_pair.first, second_pair.first});
raw_route.segment_end_coordinates.push_back(PhantomNodes{first_node, second_node});
};
osrm::for_each_pair(phantom_node_pair_list, build_phantom_pairs);
osrm::for_each_pair(snapped_phantoms, build_phantom_pairs);
if (1 == raw_route.segment_end_coordinates.size())
{
@ -171,11 +178,21 @@ template <class DataFacadeT> class ViaRoutePlugin final : public BasePlugin
// we can only know this after the fact, different SCC ids still
// allow for connection in one direction.
if (!all_in_same_component && no_route)
if (no_route)
{
auto first_component_id = snapped_phantoms.front().component.id;
auto not_in_same_component =
std::any_of(snapped_phantoms.begin(), snapped_phantoms.end(),
[first_component_id](const PhantomNode &node)
{
return node.component.id != first_component_id;
});
if (not_in_same_component)
{
json_result.values["status_message"] = "Impossible route between points.";
return 400;
}
}
return 200;
}

64
routing_algorithms/many_to_many.hpp
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@ -67,7 +67,7 @@ class ManyToManyRouting final
~ManyToManyRouting() {}
std::shared_ptr<std::vector<EdgeWeight>>
operator()(const std::vector<PhantomNodePair> &phantom_sources_array, const std::vector<PhantomNodePair> &phantom_targets_array) const
operator()(const std::vector<PhantomNode> &phantom_sources_array, const std::vector<PhantomNode> &phantom_targets_array) const
{
const auto number_of_sources = phantom_sources_array.size();
const auto number_of_targets = phantom_targets_array.size();
@ -83,35 +83,22 @@ class ManyToManyRouting final
SearchSpaceWithBuckets search_space_with_buckets;
unsigned target_id = 0;
for (const auto &pair : phantom_targets_array)
for (const auto &phantom : phantom_targets_array)
{
query_heap.Clear();
// insert target(s) at distance 0
if (SPECIAL_NODEID != pair.first.forward_node_id)
if (SPECIAL_NODEID != phantom.forward_node_id)
{
query_heap.Insert(pair.first.forward_node_id,
pair.first.GetForwardWeightPlusOffset(),
pair.first.forward_node_id);
query_heap.Insert(phantom.forward_node_id,
phantom.GetForwardWeightPlusOffset(),
phantom.forward_node_id);
}
if (SPECIAL_NODEID != pair.first.reverse_node_id)
if (SPECIAL_NODEID != phantom.reverse_node_id)
{
query_heap.Insert(pair.first.reverse_node_id,
pair.first.GetReverseWeightPlusOffset(),
pair.first.reverse_node_id);
}
if (SPECIAL_NODEID != pair.second.forward_node_id)
{
query_heap.Insert(pair.second.forward_node_id,
pair.second.GetForwardWeightPlusOffset(),
pair.second.forward_node_id);
}
if (SPECIAL_NODEID != pair.second.reverse_node_id)
{
query_heap.Insert(pair.second.reverse_node_id,
pair.second.GetReverseWeightPlusOffset(),
pair.second.reverse_node_id);
query_heap.Insert(phantom.reverse_node_id,
phantom.GetReverseWeightPlusOffset(),
phantom.reverse_node_id);
}
// explore search space
@ -124,35 +111,22 @@ class ManyToManyRouting final
// for each source do forward search
unsigned source_id = 0;
for (const auto &pair : phantom_sources_array)
for (const auto &phantom : phantom_sources_array)
{
query_heap.Clear();
// insert target(s) at distance 0
if (SPECIAL_NODEID != pair.first.forward_node_id)
if (SPECIAL_NODEID != phantom.forward_node_id)
{
query_heap.Insert(pair.first.forward_node_id,
-pair.first.GetForwardWeightPlusOffset(),
pair.first.forward_node_id);
query_heap.Insert(phantom.forward_node_id,
-phantom.GetForwardWeightPlusOffset(),
phantom.forward_node_id);
}
if (SPECIAL_NODEID != pair.first.reverse_node_id)
if (SPECIAL_NODEID != phantom.reverse_node_id)
{
query_heap.Insert(pair.first.reverse_node_id,
-pair.first.GetReverseWeightPlusOffset(),
pair.first.reverse_node_id);
}
if (SPECIAL_NODEID != pair.second.forward_node_id)
{
query_heap.Insert(pair.second.forward_node_id,
-pair.second.GetForwardWeightPlusOffset(),
pair.second.forward_node_id);
}
if (SPECIAL_NODEID != pair.second.reverse_node_id)
{
query_heap.Insert(pair.second.reverse_node_id,
-pair.second.GetReverseWeightPlusOffset(),
pair.second.reverse_node_id);
query_heap.Insert(phantom.reverse_node_id,
-phantom.GetReverseWeightPlusOffset(),
phantom.reverse_node_id);
}
// explore search space