Open-Harbor/osrm-backend
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 3 Wiki Activity

Sigh. Just randomly pick a side for border nodes for now..

Browse Source
This commit is contained in:
Daniel J. Hofmann 2017-02-14 11:43:08 +01:00 committed by Patrick Niklaus
parent e589ab814d
commit c712fafae3
1 changed files with 11 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
src/partition/partitioner.cpp
View File

@ -152,60 +152,35 @@ int Partitioner::Run(const PartitionConfig &config)
<< edge_based_graph->GetNumberOfEdges() << " edges, "
<< edge_based_graph->GetNumberOfNodes() << " nodes";
// TODO: put translation into own function / file
// TODO: node based graph to edge based graph partition id mapping should be done split off.
const auto &partition_ids = recursive_bisection.BisectionIDs();
// Partition ids, keyed by node based graph nodes
const auto &node_based_partition_ids = recursive_bisection.BisectionIDs();
std::vector<NodeID> edge_based_border_nodes;
// Partition ids, keyed by edge based graph nodes
std::vector<NodeID> edge_based_partition_ids(edge_based_graph->GetNumberOfNodes());
// Extract edge based border nodes, based on node based partition and mapping.
for (const auto node_id : util::irange(0u, edge_based_graph->GetNumberOfNodes()))
for (const auto node : util::irange(0u, edge_based_graph->GetNumberOfNodes()))
{
const auto node_based_nodes = mapping.Lookup(node_id);
const auto node_based_nodes = mapping.Lookup(node);
const auto u = node_based_nodes.u;
const auto v = node_based_nodes.v;
if (partition_ids[u] == partition_ids[v])
if (node_based_partition_ids[u] == node_based_partition_ids[v])
{
// Can use partition_ids[u/v] as partition for edge based graph `node_id`
edge_based_partition_ids[node] = node_based_partition_ids[u];
}
else
{
// Border nodes u,v - need to be resolved.
edge_based_border_nodes.push_back(node_id);
// FIXME: just pick one side for now. See #3205.
edge_based_partition_ids[node] = node_based_partition_ids[u];
}
}
util::Log() << "Fixing " << edge_based_border_nodes.size() << " edge based graph border nodes";
std::vector<std::pair<NodeID, EdgeBasedGraphEdgeData>> incoming_edges;
for (const auto border_node : edge_based_border_nodes)
{
for (const auto edge : edge_based_graph->GetAdjacentEdgeRange(border_node))
{
const auto &data = edge_based_graph->GetEdgeData(edge);
if (data.backward)
{
incoming_edges.emplace_back(edge_based_graph->GetTarget(edge), data);
edge_based_graph->DeleteEdge(border_node, edge);
}
}
const auto artificial = edge_based_graph->InsertNode();
EdgeBasedGraphEdgeData dummy{SPECIAL_EDGEID, /*is_boundary_arc=*/true, 0, 0, false, false};
for (const auto edge : incoming_edges)
{
edge_based_graph->InsertEdge(edge.first, artificial, edge.second);
}
incoming_edges.clear();
}
return 0;
}