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5531cace7f
osrm-backend/src/extractor/extraction_containers.cpp
Daniel Patterson 5531cace7f
Support maneuver relations (#4676)
2018-02-10 05:32:09 +11:00

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#include "extractor/extraction_containers.hpp"
#include "extractor/extraction_segment.hpp"
#include "extractor/extraction_way.hpp"
#include "extractor/restriction.hpp"
#include "extractor/serialization.hpp"
#include "util/coordinate_calculation.hpp"
#include "util/exception.hpp"
#include "util/exception_utils.hpp"
#include "util/fingerprint.hpp"
#include "util/log.hpp"
#include "util/name_table.hpp"
#include "util/timing_util.hpp"
#include "storage/io.hpp"
#include <boost/assert.hpp>
#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>
#include <boost/numeric/conversion/cast.hpp>
#include <boost/ref.hpp>
#include <tbb/parallel_sort.h>
#include <chrono>
#include <limits>
#include <mutex>
#include <sstream>
namespace
{
namespace oe = osrm::extractor;
struct CmpEdgeByOSMStartID
{
using value_type = oe::InternalExtractorEdge;
bool operator()(const value_type &lhs, const value_type &rhs) const
{
return lhs.result.osm_source_id < rhs.result.osm_source_id;
}
};
struct CmpEdgeByOSMTargetID
{
using value_type = oe::InternalExtractorEdge;
bool operator()(const value_type &lhs, const value_type &rhs) const
{
return lhs.result.osm_target_id < rhs.result.osm_target_id;
}
};
struct CmpEdgeByInternalSourceTargetAndName
{
using value_type = oe::InternalExtractorEdge;
bool operator()(const value_type &lhs, const value_type &rhs) const
{
if (lhs.result.source != rhs.result.source)
return lhs.result.source < rhs.result.source;
if (lhs.result.source == SPECIAL_NODEID)
return false;
if (lhs.result.target != rhs.result.target)
return lhs.result.target < rhs.result.target;
if (lhs.result.target == SPECIAL_NODEID)
return false;
auto const lhs_name_id = edge_annotation_data[lhs.result.annotation_data].name_id;
auto const rhs_name_id = edge_annotation_data[rhs.result.annotation_data].name_id;
if (lhs_name_id == rhs_name_id)
return false;
if (lhs_name_id == EMPTY_NAMEID)
return false;
if (rhs_name_id == EMPTY_NAMEID)
return true;
BOOST_ASSERT(!name_offsets.empty() && name_offsets.back() == name_data.size());
const oe::ExtractionContainers::NameCharData::const_iterator data = name_data.begin();
return std::lexicographical_compare(data + name_offsets[lhs_name_id],
data + name_offsets[lhs_name_id + 1],
data + name_offsets[rhs_name_id],
data + name_offsets[rhs_name_id + 1]);
}
const oe::ExtractionContainers::AnnotationDataVector &edge_annotation_data;
const oe::ExtractionContainers::NameCharData &name_data;
const oe::ExtractionContainers::NameOffsets &name_offsets;
};
template <typename Iter>
inline NodeID mapExternalToInternalNodeID(Iter first, Iter last, const OSMNodeID value)
{
const auto it = std::lower_bound(first, last, value);
return (it == last || value < *it) ? SPECIAL_NODEID
: static_cast<NodeID>(std::distance(first, it));
}
}
namespace osrm
{
namespace extractor
{
ExtractionContainers::ExtractionContainers()
{
// Insert four empty strings offsets for name, ref, destination, pronunciation, and exits
name_offsets.push_back(0);
name_offsets.push_back(0);
name_offsets.push_back(0);
name_offsets.push_back(0);
name_offsets.push_back(0);
// Insert the total length sentinel (corresponds to the next name string offset)
name_offsets.push_back(0);
}
/**
* Processes the collected data and serializes it.
* At this point nodes are still referenced by their OSM id.
*
* - map start-end nodes of ways to ways used in restrictions to compute compressed
* trippe representation
* - filter nodes list to nodes that are referenced by ways
* - merge edges with nodes to include location of start/end points and serialize
*
*/
void ExtractionContainers::PrepareData(ScriptingEnvironment &scripting_environment,
const std::string &osrm_path,
const std::string &name_file_name)
{
storage::io::FileWriter file_out(osrm_path, storage::io::FileWriter::GenerateFingerprint);
PrepareNodes();
WriteNodes(file_out);
PrepareEdges(scripting_environment);
all_nodes_list.clear(); // free all_nodes_list before allocation of normal_edges
all_nodes_list.shrink_to_fit();
WriteEdges(file_out);
WriteMetadata(file_out);
/* Sort these so that searching is a bit faster later on */
{
util::UnbufferedLog log;
log << "Sorting used ways ... ";
TIMER_START(sort_ways);
tbb::parallel_sort(way_start_end_id_list.begin(),
way_start_end_id_list.end(),
FirstAndLastSegmentOfWayCompare());
TIMER_STOP(sort_ways);
log << "ok, after " << TIMER_SEC(sort_ways) << "s";
}
PrepareManeuverOverrides();
PrepareRestrictions();
WriteCharData(name_file_name);
}
void ExtractionContainers::WriteCharData(const std::string &file_name)
{
util::UnbufferedLog log;
log << "writing street name index ... ";
TIMER_START(write_index);
storage::io::FileWriter file(file_name, storage::io::FileWriter::GenerateFingerprint);
const util::NameTable::IndexedData indexed_data;
indexed_data.write(file, name_offsets.begin(), name_offsets.end(), name_char_data.begin());
TIMER_STOP(write_index);
log << "ok, after " << TIMER_SEC(write_index) << "s";
}
void ExtractionContainers::PrepareNodes()
{
{
util::UnbufferedLog log;
log << "Sorting used nodes ... " << std::flush;
TIMER_START(sorting_used_nodes);
tbb::parallel_sort(used_node_id_list.begin(), used_node_id_list.end());
TIMER_STOP(sorting_used_nodes);
log << "ok, after " << TIMER_SEC(sorting_used_nodes) << "s";
}
{
util::UnbufferedLog log;
log << "Erasing duplicate nodes ... " << std::flush;
TIMER_START(erasing_dups);
auto new_end = std::unique(used_node_id_list.begin(), used_node_id_list.end());
used_node_id_list.resize(new_end - used_node_id_list.begin());
TIMER_STOP(erasing_dups);
log << "ok, after " << TIMER_SEC(erasing_dups) << "s";
}
{
util::UnbufferedLog log;
log << "Sorting all nodes ... " << std::flush;
TIMER_START(sorting_nodes);
tbb::parallel_sort(
all_nodes_list.begin(), all_nodes_list.end(), [](const auto &left, const auto &right) {
return left.node_id < right.node_id;
});
TIMER_STOP(sorting_nodes);
log << "ok, after " << TIMER_SEC(sorting_nodes) << "s";
}
{
util::UnbufferedLog log;
log << "Building node id map ... " << std::flush;
TIMER_START(id_map);
auto node_iter = all_nodes_list.begin();
auto ref_iter = used_node_id_list.begin();
auto used_nodes_iter = used_node_id_list.begin();
const auto all_nodes_list_end = all_nodes_list.end();
const auto used_node_id_list_end = used_node_id_list.end();
// compute the intersection of nodes that were referenced and nodes we actually have
while (node_iter != all_nodes_list_end && ref_iter != used_node_id_list_end)
{
if (node_iter->node_id < *ref_iter)
{
node_iter++;
continue;
}
if (node_iter->node_id > *ref_iter)
{
ref_iter++;
continue;
}
BOOST_ASSERT(node_iter->node_id == *ref_iter);
*used_nodes_iter = std::move(*ref_iter);
used_nodes_iter++;
node_iter++;
ref_iter++;
}
// Remove unused nodes and check maximal internal node id
used_node_id_list.resize(std::distance(used_node_id_list.begin(), used_nodes_iter));
if (used_node_id_list.size() > std::numeric_limits<NodeID>::max())
{
throw util::exception("There are too many nodes remaining after filtering, OSRM only "
"supports 2^32 unique nodes, but there were " +
std::to_string(used_node_id_list.size()) + SOURCE_REF);
}
max_internal_node_id = boost::numeric_cast<std::uint64_t>(used_node_id_list.size());
TIMER_STOP(id_map);
log << "ok, after " << TIMER_SEC(id_map) << "s";
}
}
void ExtractionContainers::PrepareEdges(ScriptingEnvironment &scripting_environment)
{
// Sort edges by start.
{
util::UnbufferedLog log;
log << "Sorting edges by start ... " << std::flush;
TIMER_START(sort_edges_by_start);
tbb::parallel_sort(all_edges_list.begin(), all_edges_list.end(), CmpEdgeByOSMStartID());
TIMER_STOP(sort_edges_by_start);
log << "ok, after " << TIMER_SEC(sort_edges_by_start) << "s";
}
{
util::UnbufferedLog log;
log << "Setting start coords ... " << std::flush;
TIMER_START(set_start_coords);
// Traverse list of edges and nodes in parallel and set start coord
auto node_iterator = all_nodes_list.begin();
auto edge_iterator = all_edges_list.begin();
const auto all_edges_list_end = all_edges_list.end();
const auto all_nodes_list_end = all_nodes_list.end();
while (edge_iterator != all_edges_list_end && node_iterator != all_nodes_list_end)
{
if (edge_iterator->result.osm_source_id < node_iterator->node_id)
{
util::Log(logDEBUG) << "Found invalid node reference "
<< edge_iterator->result.source;
edge_iterator->result.source = SPECIAL_NODEID;
++edge_iterator;
continue;
}
if (edge_iterator->result.osm_source_id > node_iterator->node_id)
{
node_iterator++;
continue;
}
// remove loops
if (edge_iterator->result.osm_source_id == edge_iterator->result.osm_target_id)
{
edge_iterator->result.source = SPECIAL_NODEID;
edge_iterator->result.target = SPECIAL_NODEID;
++edge_iterator;
continue;
}
BOOST_ASSERT(edge_iterator->result.osm_source_id == node_iterator->node_id);
// assign new node id
const auto node_id = mapExternalToInternalNodeID(
used_node_id_list.begin(), used_node_id_list.end(), node_iterator->node_id);
BOOST_ASSERT(node_id != SPECIAL_NODEID);
edge_iterator->result.source = node_id;
edge_iterator->source_coordinate.lat = node_iterator->lat;
edge_iterator->source_coordinate.lon = node_iterator->lon;
++edge_iterator;
}
// Remove all remaining edges. They are invalid because there are no corresponding nodes for
// them. This happens when using osmosis with bbox or polygon to extract smaller areas.
auto markSourcesInvalid = [](InternalExtractorEdge &edge) {
util::Log(logDEBUG) << "Found invalid node reference " << edge.result.source;
edge.result.source = SPECIAL_NODEID;
edge.result.osm_source_id = SPECIAL_OSM_NODEID;
};
std::for_each(edge_iterator, all_edges_list_end, markSourcesInvalid);
TIMER_STOP(set_start_coords);
log << "ok, after " << TIMER_SEC(set_start_coords) << "s";
}
{
// Sort Edges by target
util::UnbufferedLog log;
log << "Sorting edges by target ... " << std::flush;
TIMER_START(sort_edges_by_target);
tbb::parallel_sort(all_edges_list.begin(), all_edges_list.end(), CmpEdgeByOSMTargetID());
TIMER_STOP(sort_edges_by_target);
log << "ok, after " << TIMER_SEC(sort_edges_by_target) << "s";
}
{
// Compute edge weights
util::UnbufferedLog log;
log << "Computing edge weights ... " << std::flush;
TIMER_START(compute_weights);
auto node_iterator = all_nodes_list.begin();
auto edge_iterator = all_edges_list.begin();
const auto all_edges_list_end_ = all_edges_list.end();
const auto all_nodes_list_end_ = all_nodes_list.end();
const auto weight_multiplier =
scripting_environment.GetProfileProperties().GetWeightMultiplier();
while (edge_iterator != all_edges_list_end_ && node_iterator != all_nodes_list_end_)
{
// skip all invalid edges
if (edge_iterator->result.source == SPECIAL_NODEID)
{
++edge_iterator;
continue;
}
if (edge_iterator->result.osm_target_id < node_iterator->node_id)
{
util::Log(logDEBUG) << "Found invalid node reference "
<< static_cast<uint64_t>(edge_iterator->result.osm_target_id);
edge_iterator->result.target = SPECIAL_NODEID;
++edge_iterator;
continue;
}
if (edge_iterator->result.osm_target_id > node_iterator->node_id)
{
++node_iterator;
continue;
}
BOOST_ASSERT(edge_iterator->result.osm_target_id == node_iterator->node_id);
BOOST_ASSERT(edge_iterator->source_coordinate.lat !=
util::FixedLatitude{std::numeric_limits<std::int32_t>::min()});
BOOST_ASSERT(edge_iterator->source_coordinate.lon !=
util::FixedLongitude{std::numeric_limits<std::int32_t>::min()});
util::Coordinate source_coord(edge_iterator->source_coordinate);
util::Coordinate target_coord{node_iterator->lon, node_iterator->lat};
// flip source and target coordinates if segment is in backward direction only
if (!edge_iterator->result.flags.forward && edge_iterator->result.flags.backward)
std::swap(source_coord, target_coord);
const auto distance =
util::coordinate_calculation::greatCircleDistance(source_coord, target_coord);
const auto weight = edge_iterator->weight_data(distance);
const auto duration = edge_iterator->duration_data(distance);
ExtractionSegment segment(source_coord, target_coord, distance, weight, duration);
scripting_environment.ProcessSegment(segment);
auto &edge = edge_iterator->result;
edge.weight = std::max<EdgeWeight>(1, std::round(segment.weight * weight_multiplier));
edge.duration = std::max<EdgeWeight>(1, std::round(segment.duration * 10.));
// assign new node id
const auto node_id = mapExternalToInternalNodeID(
used_node_id_list.begin(), used_node_id_list.end(), node_iterator->node_id);
BOOST_ASSERT(node_id != SPECIAL_NODEID);
edge.target = node_id;
// orient edges consistently: source id < target id
// important for multi-edge removal
if (edge.source > edge.target)
{
std::swap(edge.source, edge.target);
// std::swap does not work with bit-fields
bool temp = edge.flags.forward;
edge.flags.forward = edge.flags.backward;
edge.flags.backward = temp;
}
++edge_iterator;
}
// Remove all remaining edges. They are invalid because there are no corresponding nodes for
// them. This happens when using osmosis with bbox or polygon to extract smaller areas.
auto markTargetsInvalid = [](InternalExtractorEdge &edge) {
util::Log(logDEBUG) << "Found invalid node reference " << edge.result.target;
edge.result.target = SPECIAL_NODEID;
};
std::for_each(edge_iterator, all_edges_list_end_, markTargetsInvalid);
TIMER_STOP(compute_weights);
log << "ok, after " << TIMER_SEC(compute_weights) << "s";
}
// Sort edges by start.
{
util::UnbufferedLog log;
log << "Sorting edges by renumbered start ... ";
TIMER_START(sort_edges_by_renumbered_start);
std::mutex name_data_mutex;
tbb::parallel_sort(all_edges_list.begin(),
all_edges_list.end(),
CmpEdgeByInternalSourceTargetAndName{
all_edges_annotation_data_list, name_char_data, name_offsets});
TIMER_STOP(sort_edges_by_renumbered_start);
log << "ok, after " << TIMER_SEC(sort_edges_by_renumbered_start) << "s";
}
BOOST_ASSERT(all_edges_list.size() > 0);
for (std::size_t i = 0; i < all_edges_list.size();)
{
// only invalid edges left
if (all_edges_list[i].result.source == SPECIAL_NODEID)
{
break;
}
// skip invalid edges
if (all_edges_list[i].result.target == SPECIAL_NODEID)
{
++i;
continue;
}
std::size_t start_idx = i;
NodeID source = all_edges_list[i].result.source;
NodeID target = all_edges_list[i].result.target;
auto min_forward = std::make_pair(std::numeric_limits<EdgeWeight>::max(),
std::numeric_limits<EdgeWeight>::max());
auto min_backward = std::make_pair(std::numeric_limits<EdgeWeight>::max(),
std::numeric_limits<EdgeWeight>::max());
std::size_t min_forward_idx = std::numeric_limits<std::size_t>::max();
std::size_t min_backward_idx = std::numeric_limits<std::size_t>::max();
// find minimal edge in both directions
while (i < all_edges_list.size() && all_edges_list[i].result.source == source &&
all_edges_list[i].result.target == target)
{
const auto &result = all_edges_list[i].result;
const auto value = std::make_pair(result.weight, result.duration);
if (result.flags.forward && value < min_forward)
{
min_forward_idx = i;
min_forward = value;
}
if (result.flags.backward && value < min_backward)
{
min_backward_idx = i;
min_backward = value;
}
// this also increments the outer loop counter!
i++;
}
BOOST_ASSERT(min_forward_idx == std::numeric_limits<std::size_t>::max() ||
min_forward_idx < i);
BOOST_ASSERT(min_backward_idx == std::numeric_limits<std::size_t>::max() ||
min_backward_idx < i);
BOOST_ASSERT(min_backward_idx != std::numeric_limits<std::size_t>::max() ||
min_forward_idx != std::numeric_limits<std::size_t>::max());
if (min_backward_idx == min_forward_idx)
{
all_edges_list[min_forward_idx].result.flags.is_split = false;
all_edges_list[min_forward_idx].result.flags.forward = true;
all_edges_list[min_forward_idx].result.flags.backward = true;
}
else
{
bool has_forward = min_forward_idx != std::numeric_limits<std::size_t>::max();
bool has_backward = min_backward_idx != std::numeric_limits<std::size_t>::max();
if (has_forward)
{
all_edges_list[min_forward_idx].result.flags.forward = true;
all_edges_list[min_forward_idx].result.flags.backward = false;
all_edges_list[min_forward_idx].result.flags.is_split = has_backward;
}
if (has_backward)
{
std::swap(all_edges_list[min_backward_idx].result.source,
all_edges_list[min_backward_idx].result.target);
all_edges_list[min_backward_idx].result.flags.forward = true;
all_edges_list[min_backward_idx].result.flags.backward = false;
all_edges_list[min_backward_idx].result.flags.is_split = has_forward;
}
}
// invalidate all unused edges
for (std::size_t j = start_idx; j < i; j++)
{
if (j == min_forward_idx || j == min_backward_idx)
{
continue;
}
all_edges_list[j].result.source = SPECIAL_NODEID;
all_edges_list[j].result.target = SPECIAL_NODEID;
}
}
}
void ExtractionContainers::WriteEdges(storage::io::FileWriter &file_out) const
{
std::vector<NodeBasedEdge> normal_edges;
normal_edges.reserve(all_edges_list.size());
{
util::UnbufferedLog log;
log << "Writing used edges ... " << std::flush;
TIMER_START(write_edges);
// Traverse list of edges and nodes in parallel and set target coord
for (const auto &edge : all_edges_list)
{
if (edge.result.source == SPECIAL_NODEID || edge.result.target == SPECIAL_NODEID)
{
continue;
}
// IMPORTANT: here, we're using slicing to only write the data from the base
// class of NodeBasedEdgeWithOSM
normal_edges.push_back(edge.result);
}
if (normal_edges.size() > std::numeric_limits<uint32_t>::max())
{
throw util::exception("There are too many edges, OSRM only supports 2^32" + SOURCE_REF);
}
file_out.WriteElementCount64(normal_edges.size());
file_out.WriteFrom(normal_edges.data(), normal_edges.size());
TIMER_STOP(write_edges);
log << "ok, after " << TIMER_SEC(write_edges) << "s";
log << " -- Processed " << normal_edges.size() << " edges";
}
}
void ExtractionContainers::WriteMetadata(storage::io::FileWriter &file_out) const
{
util::UnbufferedLog log;
log << "Writing way meta-data ... " << std::flush;
TIMER_START(write_meta_data);
file_out.WriteElementCount64(all_edges_annotation_data_list.size());
file_out.WriteFrom(all_edges_annotation_data_list.data(),
all_edges_annotation_data_list.size());
TIMER_STOP(write_meta_data);
log << "ok, after " << TIMER_SEC(write_meta_data) << "s";
log << " -- Metadata contains << " << all_edges_annotation_data_list.size() << " entries.";
}
void ExtractionContainers::WriteNodes(storage::io::FileWriter &file_out) const
{
{
// write dummy value, will be overwritten later
util::UnbufferedLog log;
log << "setting number of nodes ... " << std::flush;
file_out.WriteElementCount64(max_internal_node_id);
log << "ok";
}
{
util::UnbufferedLog log;
log << "Confirming/Writing used nodes ... ";
TIMER_START(write_nodes);
// identify all used nodes by a merging step of two sorted lists
auto node_iterator = all_nodes_list.begin();
auto node_id_iterator = used_node_id_list.begin();
const auto used_node_id_list_end = used_node_id_list.end();
const auto all_nodes_list_end = all_nodes_list.end();
while (node_id_iterator != used_node_id_list_end && node_iterator != all_nodes_list_end)
{
if (*node_id_iterator < node_iterator->node_id)
{
++node_id_iterator;
continue;
}
if (*node_id_iterator > node_iterator->node_id)
{
++node_iterator;
continue;
}
BOOST_ASSERT(*node_id_iterator == node_iterator->node_id);
file_out.WriteOne((*node_iterator));
++node_id_iterator;
++node_iterator;
}
TIMER_STOP(write_nodes);
log << "ok, after " << TIMER_SEC(write_nodes) << "s";
}
{
util::UnbufferedLog log;
log << "Writing barrier nodes ... ";
TIMER_START(write_nodes);
std::vector<NodeID> internal_barrier_nodes;
for (const auto osm_id : barrier_nodes)
{
const auto node_id = mapExternalToInternalNodeID(
used_node_id_list.begin(), used_node_id_list.end(), osm_id);
if (node_id != SPECIAL_NODEID)
{
internal_barrier_nodes.push_back(node_id);
}
}
storage::serialization::write(file_out, internal_barrier_nodes);
log << "ok, after " << TIMER_SEC(write_nodes) << "s";
}
{
util::UnbufferedLog log;
log << "Writing traffic light nodes ... ";
TIMER_START(write_nodes);
std::vector<NodeID> internal_traffic_signals;
for (const auto osm_id : traffic_signals)
{
const auto node_id = mapExternalToInternalNodeID(
used_node_id_list.begin(), used_node_id_list.end(), osm_id);
if (node_id != SPECIAL_NODEID)
{
internal_traffic_signals.push_back(node_id);
}
}
storage::serialization::write(file_out, internal_traffic_signals);
log << "ok, after " << TIMER_SEC(write_nodes) << "s";
}
util::Log() << "Processed " << max_internal_node_id << " nodes";
}
void ExtractionContainers::PrepareManeuverOverrides()
{
std::unordered_map<OSMWayID, FirstAndLastSegmentOfWay> referenced_ways;
// prepare for extracting source/destination nodes for all maneuvers
{
util::UnbufferedLog log;
log << "Collecting start/end information on " << external_maneuver_overrides_list.size()
<< " maneuver overrides...";
TIMER_START(prepare_maneuver_overrides);
const auto mark_ids = [&](auto const &external_maneuver_override) {
FirstAndLastSegmentOfWay dummy_segment{
MAX_OSM_WAYID, MAX_OSM_NODEID, MAX_OSM_NODEID, MAX_OSM_NODEID, MAX_OSM_NODEID};
std::for_each(external_maneuver_override.via_ways.begin(),
external_maneuver_override.via_ways.end(),
[&referenced_ways, dummy_segment](const auto &element) {
referenced_ways[element] = dummy_segment;
});
};
// First, make an empty hashtable keyed by the ways referenced
// by the maneuver overrides
std::for_each(external_maneuver_overrides_list.begin(),
external_maneuver_overrides_list.end(),
mark_ids);
const auto set_ids = [&](auto const &start_end) {
auto itr = referenced_ways.find(start_end.way_id);
if (itr != referenced_ways.end())
itr->second = start_end;
};
// Then, populate the values in that hashtable for only the ways
// referenced
std::for_each(way_start_end_id_list.cbegin(), way_start_end_id_list.cend(), set_ids);
TIMER_STOP(prepare_maneuver_overrides);
log << "ok, after " << TIMER_SEC(prepare_maneuver_overrides) << "s";
}
auto const osm_node_to_internal_nbn = [&](auto const osm_node) {
auto internal = mapExternalToInternalNodeID(
used_node_id_list.begin(), used_node_id_list.end(), osm_node);
if (internal == SPECIAL_NODEID)
{
util::Log(logDEBUG) << "Maneuver override references invalid node: " << osm_node;
}
return internal;
};
// Given
// a -- b - ????????? - c -- d as via segment
// and either
// d -- e - ????????? - f -- g or
// h -- i - ????????? - j -- a
// return
// (d,e) or (j,a) as entry-segment
/**
* Here's what these properties represent on the node-based-graph
* way "ABCD" way "AB"
* -----------------------------------------------------------------
* ⬇ A first_segment_source_id
* ⬇ |
* ⬇︎ B first_segment_target_id A first_segment_source_id
* ⬇︎ | ⬇ | last_segment_source_id
* ⬇︎ | ⬇ |
* ⬇︎ | B first_segment_target_id
* ⬇︎ C last_segment_source_id last_segment_target_id
* ⬇︎ |
* ⬇︎ D last_segment_target_id
*
* Finds the point where two ways connect at the end, and returns the 3
* node-based nodes that describe the turn (the node just before, the
* node at the turn, and the next node after the turn)
**/
auto const find_turn_from_way_tofrom_nodes = [&](auto const &from_segment,
auto const &to_segment) {
if (from_segment.first_segment_source_id == to_segment.first_segment_source_id)
{
return NodeBasedTurn{osm_node_to_internal_nbn(from_segment.first_segment_target_id),
osm_node_to_internal_nbn(from_segment.first_segment_source_id),
osm_node_to_internal_nbn(to_segment.first_segment_target_id)};
}
else if (from_segment.first_segment_source_id == to_segment.last_segment_target_id)
{
return NodeBasedTurn{osm_node_to_internal_nbn(from_segment.first_segment_target_id),
osm_node_to_internal_nbn(from_segment.first_segment_source_id),
osm_node_to_internal_nbn(to_segment.last_segment_source_id)};
}
else if (from_segment.last_segment_target_id == to_segment.first_segment_source_id)
{
return NodeBasedTurn{osm_node_to_internal_nbn(from_segment.last_segment_source_id),
osm_node_to_internal_nbn(from_segment.last_segment_target_id),
osm_node_to_internal_nbn(to_segment.first_segment_target_id)};
}
else if (from_segment.last_segment_target_id == to_segment.last_segment_target_id)
{
return NodeBasedTurn{osm_node_to_internal_nbn(from_segment.last_segment_source_id),
osm_node_to_internal_nbn(from_segment.last_segment_target_id),
osm_node_to_internal_nbn(to_segment.last_segment_source_id)};
}
util::Log(logDEBUG) << "Maneuver override ways " << from_segment.way_id << " and "
<< to_segment.way_id << " are not connected";
return NodeBasedTurn{SPECIAL_NODEID, SPECIAL_NODEID, SPECIAL_NODEID};
};
auto const get_turn_from_way_pair = [&](const OSMWayID &from_id, const OSMWayID &to_id) {
auto const from_segment_itr = referenced_ways.find(from_id);
if (from_segment_itr->second.way_id != from_id)
{
util::Log(logDEBUG) << "Override references invalid way: " << from_id;
return NodeBasedTurn{SPECIAL_NODEID, SPECIAL_NODEID, SPECIAL_NODEID};
}
auto const to_segment_itr = referenced_ways.find(to_id);
if (to_segment_itr->second.way_id != to_id)
{
util::Log(logDEBUG) << "Override references invalid way: " << to_id;
return NodeBasedTurn{SPECIAL_NODEID, SPECIAL_NODEID, SPECIAL_NODEID};
}
auto result =
find_turn_from_way_tofrom_nodes(from_segment_itr->second, to_segment_itr->second);
return result;
};
const auto strings_to_turn_type_and_direction = [](const std::string &turn_string,
const std::string &direction_string) {
auto result = std::make_pair(guidance::TurnType::MaxTurnType,
guidance::DirectionModifier::MaxDirectionModifier);
if (turn_string == "uturn")
{
result.first = guidance::TurnType::Turn;
result.second = guidance::DirectionModifier::UTurn;
}
else if (turn_string == "continue")
{
result.first = guidance::TurnType::Continue;
}
else if (turn_string == "turn")
{
result.first = guidance::TurnType::Turn;
}
else if (turn_string == "fork")
{
result.first = guidance::TurnType::Fork;
}
else if (turn_string == "suppress")
{
result.first = guidance::TurnType::Suppressed;
}
// Directions
if (direction_string == "left")
{
result.second = guidance::DirectionModifier::Left;
}
else if (direction_string == "slight_left")
{
result.second = guidance::DirectionModifier::SlightLeft;
}
else if (direction_string == "sharp_left")
{
result.second = guidance::DirectionModifier::SharpLeft;
}
else if (direction_string == "sharp_right")
{
result.second = guidance::DirectionModifier::SharpRight;
}
else if (direction_string == "slight_right")
{
result.second = guidance::DirectionModifier::SlightRight;
}
else if (direction_string == "right")
{
result.second = guidance::DirectionModifier::Right;
}
return result;
};
// Transform an InternalManeuverOverride (based on WayIDs) into an OSRM override (base on
// NodeIDs).
// Returns true on successful transformation, false in case of invalid references.
// Later, the UnresolvedManeuverOverride will be converted into a final ManeuverOverride
// once the edge-based-node IDs are generated by the edge-based-graph-factory
const auto transform = [&](const auto &external, auto &internal) {
// Create a stub override
auto maneuver_override =
UnresolvedManeuverOverride{{},
osm_node_to_internal_nbn(external.via_node),
guidance::TurnType::Invalid,
guidance::DirectionModifier::MaxDirectionModifier};
// Convert Way IDs into node-based-node IDs
// We iterate from back to front here because the first node in the node_sequence
// must eventually be a source node, but all the others must be targets.
// the get_internal_pairs_from_ways returns (source,target), so if we
// iterate backwards, we will end up with source,target,target,target,target
// in a sequence, which is what we want
for (auto i = 0ul; i < external.via_ways.size() - 1; ++i)
{
// returns the two far ends of the referenced ways
auto turn = get_turn_from_way_pair(external.via_ways[i], external.via_ways[i + 1]);
maneuver_override.turn_sequence.push_back(turn);
}
// check if we were able to resolve all the involved ways
// auto maneuver_override =
// get_maneuver_override_from_OSM_ids(external.from, external.to,
// external.via_node);
std::tie(maneuver_override.override_type, maneuver_override.direction) =
strings_to_turn_type_and_direction(external.maneuver, external.direction);
if (!maneuver_override.Valid())
{
util::Log(logDEBUG) << "Override is invalid";
return false;
}
internal = std::move(maneuver_override);
return true;
};
const auto transform_into_internal_types =
[&](const InputManeuverOverride &external_maneuver_override) {
UnresolvedManeuverOverride internal_maneuver_override;
if (transform(external_maneuver_override, internal_maneuver_override))
internal_maneuver_overrides.push_back(std::move(internal_maneuver_override));
};
// Transforming the overrides into the dedicated internal types
{
util::UnbufferedLog log;
log << "Collecting start/end information on " << external_maneuver_overrides_list.size()
<< " maneuver overrides...";
TIMER_START(transform);
std::for_each(external_maneuver_overrides_list.begin(),
external_maneuver_overrides_list.end(),
transform_into_internal_types);
TIMER_STOP(transform);
log << "ok, after " << TIMER_SEC(transform) << "s";
}
}
void ExtractionContainers::PrepareRestrictions()
{
// contain the start/end nodes of each way that is part of an restriction
std::unordered_map<OSMWayID, FirstAndLastSegmentOfWay> referenced_ways;
// prepare for extracting source/destination nodes for all restrictions
{
util::UnbufferedLog log;
log << "Collecting start/end information on " << restrictions_list.size()
<< " restrictions...";
TIMER_START(prepare_restrictions);
const auto mark_ids = [&](auto const &turn_restriction) {
FirstAndLastSegmentOfWay dummy_segment{
MAX_OSM_WAYID, MAX_OSM_NODEID, MAX_OSM_NODEID, MAX_OSM_NODEID, MAX_OSM_NODEID};
if (turn_restriction.Type() == RestrictionType::WAY_RESTRICTION)
{
const auto &way = turn_restriction.AsWayRestriction();
referenced_ways[way.from] = dummy_segment;
referenced_ways[way.to] = dummy_segment;
referenced_ways[way.via] = dummy_segment;
}
else
{
BOOST_ASSERT(turn_restriction.Type() == RestrictionType::NODE_RESTRICTION);
const auto &node = turn_restriction.AsNodeRestriction();
referenced_ways[node.from] = dummy_segment;
referenced_ways[node.to] = dummy_segment;
}
};
std::for_each(restrictions_list.begin(), restrictions_list.end(), mark_ids);
// enter invalid IDs into the above maps to indicate that we want to find out about
// start/end
// nodes of these ways
// update the values for all edges already sporting SPECIAL_NODEID
const auto set_ids = [&](auto const &start_end) {
auto itr = referenced_ways.find(start_end.way_id);
if (itr != referenced_ways.end())
itr->second = start_end;
};
std::for_each(way_start_end_id_list.cbegin(), way_start_end_id_list.cend(), set_ids);
TIMER_STOP(prepare_restrictions);
log << "ok, after " << TIMER_SEC(prepare_restrictions) << "s";
}
auto const to_internal = [&](auto const osm_node) {
auto internal = mapExternalToInternalNodeID(
used_node_id_list.begin(), used_node_id_list.end(), osm_node);
if (internal == SPECIAL_NODEID)
{
util::Log(logDEBUG) << "Restriction references invalid node: " << osm_node;
}
return internal;
};
// Given
// a -- b - ????????? - c -- d as via segment
// and either
// d -- e - ????????? - f -- g or
// h -- i - ????????? - j -- a
// (d,e) or (j,a) as entry-segment
auto const find_node_restriction =
[&](auto const &segment, auto const &via_segment, auto const via_node) {
// In case of way-restrictions, via-node will be set to MAX_OSM_NODEID to signal
// that
// the node is not present.
// connected at the front of the segment
// Turn restrictions are described as a restriction between the two segments closest
// to
// the shared via-node on the from and to ways. Graph compression will later
// renumber
// the from and to internal node IDs as nodes are plucked out of the node-based
// graph.
if (via_node == MAX_OSM_NODEID || segment.first_segment_source_id == via_node)
{
if (segment.first_segment_source_id == via_segment.first_segment_source_id)
{
return NodeRestriction{to_internal(segment.first_segment_target_id),
to_internal(segment.first_segment_source_id),
to_internal(via_segment.first_segment_target_id)};
}
else if (segment.first_segment_source_id == via_segment.last_segment_target_id)
{
return NodeRestriction{to_internal(segment.first_segment_target_id),
to_internal(segment.first_segment_source_id),
to_internal(via_segment.last_segment_source_id)};
}
}
// connected at the end of the segment
if (via_node == MAX_OSM_NODEID || segment.last_segment_target_id == via_node)
{
if (segment.last_segment_target_id == via_segment.first_segment_source_id)
{
return NodeRestriction{to_internal(segment.last_segment_source_id),
to_internal(segment.last_segment_target_id),
to_internal(via_segment.first_segment_target_id)};
}
else if (segment.last_segment_target_id == via_segment.last_segment_target_id)
{
return NodeRestriction{to_internal(segment.last_segment_source_id),
to_internal(segment.last_segment_target_id),
to_internal(via_segment.last_segment_source_id)};
}
}
// unconnected
util::Log(logDEBUG) << "Restriction references unconnected way: " << segment.way_id;
return NodeRestriction{SPECIAL_NODEID, SPECIAL_NODEID, SPECIAL_NODEID};
};
// translate the turn from one segment onto another into a node restriction (the ways can
// only
// be connected at a single location)
auto const get_node_restriction_from_OSM_ids = [&](
auto const from_id, auto const to_id, const OSMNodeID via_node) {
auto const from_segment_itr = referenced_ways.find(from_id);
if (from_segment_itr->second.way_id != from_id)
{
util::Log(logDEBUG) << "Restriction references invalid way: " << from_id;
return NodeRestriction{SPECIAL_NODEID, SPECIAL_NODEID, SPECIAL_NODEID};
}
auto const to_segment_itr = referenced_ways.find(to_id);
if (to_segment_itr->second.way_id != to_id)
{
util::Log(logDEBUG) << "Restriction references invalid way: " << to_id;
return NodeRestriction{SPECIAL_NODEID, SPECIAL_NODEID, SPECIAL_NODEID};
}
return find_node_restriction(from_segment_itr->second, to_segment_itr->second, via_node);
};
// Transform an OSMRestriction (based on WayIDs) into an OSRM restriction (base on NodeIDs).
// Returns true on successful transformation, false in case of invalid references.
// Based on the auto type deduction, this transfor handles both conditional and
// unconditional
// turn restrictions.
const auto transform = [&](const auto &external_type, auto &internal_type) {
if (external_type.Type() == RestrictionType::WAY_RESTRICTION)
{
auto const &external = external_type.AsWayRestriction();
// check if we were able to resolve all the involved ways
auto const from_restriction =
get_node_restriction_from_OSM_ids(external.from, external.via, MAX_OSM_NODEID);
auto const to_restriction =
get_node_restriction_from_OSM_ids(external.via, external.to, MAX_OSM_NODEID);
// failed to translate either of the involved nodes?
if (!from_restriction.Valid() || !to_restriction.Valid())
return false;
// point located at both via and segment is alway on `second`, to FSSF is the order
// we
// need
WayRestriction way_restriction{from_restriction, to_restriction};
internal_type.node_or_way = std::move(way_restriction);
return true;
}
else
{
BOOST_ASSERT(external_type.Type() == RestrictionType::NODE_RESTRICTION);
auto const &external = external_type.AsNodeRestriction();
auto const via_node = to_internal(external.via);
// check if we were able to resolve all the involved ways
auto restriction =
get_node_restriction_from_OSM_ids(external.from, external.to, external.via);
if (!restriction.Valid())
{
return false;
}
if (restriction.via != via_node)
{
util::Log(logDEBUG) << "Restriction references invalid way: " << external.via;
return false;
}
internal_type.node_or_way = std::move(restriction);
return true;
}
};
// wrapper function to handle distinction between conditional and unconditional turn
// restrictions
const auto transform_into_internal_types =
[&](const InputConditionalTurnRestriction &external_restriction) {
// unconditional restriction
if (external_restriction.condition.empty() &&
external_restriction.Type() == RestrictionType::NODE_RESTRICTION)
{
TurnRestriction restriction;
restriction.is_only = external_restriction.is_only;
if (transform(external_restriction, restriction))
unconditional_turn_restrictions.push_back(std::move(restriction));
}
// conditional turn restriction
else
{
ConditionalTurnRestriction restriction;
restriction.is_only = external_restriction.is_only;
restriction.condition = std::move(external_restriction.condition);
if (transform(external_restriction, restriction))
{
conditional_turn_restrictions.push_back(std::move(restriction));
}
}
};
// Transforming the restrictions into the dedicated internal types
{
util::UnbufferedLog log;
log << "Collecting start/end information on " << restrictions_list.size()
<< " restrictions...";
TIMER_START(transform);
std::for_each(
restrictions_list.begin(), restrictions_list.end(), transform_into_internal_types);
TIMER_STOP(transform);
log << "ok, after " << TIMER_SEC(transform) << "s";
}
}
} // namespace extractor
} // namespace osrm
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