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Implement distance pruning for MLD as well

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This commit is contained in:
Patrick Niklaus
2017-04-10 14:12:10 +00:00
committed by Patrick Niklaus
parent da474a16a9
commit a88fef2937
3 changed files with 31 additions and 16 deletions
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include/engine/routing_algorithms/routing_base_mld.hpp
+20 -10
View File
@@ -186,6 +186,7 @@ search(const datafacade::ContiguousInternalMemoryDataFacade<Algorithm> &facade,
SearchEngineData<Algorithm>::QueryHeap &reverse_heap,
const bool force_loop_forward,
const bool force_loop_reverse,
EdgeWeight weight_upper_bound,
Args... args)
{
@@ -196,7 +197,7 @@ search(const datafacade::ContiguousInternalMemoryDataFacade<Algorithm> &facade,
// run two-Target Dijkstra routing step.
NodeID middle = SPECIAL_NODEID;
EdgeWeight weight = INVALID_EDGE_WEIGHT;
EdgeWeight weight = weight_upper_bound;
EdgeWeight forward_heap_min = forward_heap.MinKey();
EdgeWeight reverse_heap_min = reverse_heap.MinKey();
while (forward_heap.Size() + reverse_heap.Size() > 0 &&
@@ -231,7 +232,7 @@ search(const datafacade::ContiguousInternalMemoryDataFacade<Algorithm> &facade,
};
// No path found for both target nodes?
if (weight == INVALID_EDGE_WEIGHT || SPECIAL_NODEID == middle)
if (weight >= weight_upper_bound || SPECIAL_NODEID == middle)
{
return std::make_tuple(
INVALID_EDGE_WEIGHT, SPECIAL_NODEID, SPECIAL_NODEID, std::vector<EdgeID>());
@@ -297,6 +298,7 @@ search(const datafacade::ContiguousInternalMemoryDataFacade<Algorithm> &facade,
reverse_heap,
force_loop_forward,
force_loop_reverse,
INVALID_EDGE_WEIGHT,
sublevel,
parent_cell_id);
BOOST_ASSERT(!subpath.empty());
@@ -320,14 +322,17 @@ inline void search(const datafacade::ContiguousInternalMemoryDataFacade<Algorith
const bool force_loop_forward,
const bool force_loop_reverse,
const PhantomNodes &phantom_nodes,
const int duration_upper_bound = INVALID_EDGE_WEIGHT)
const EdgeWeight weight_upper_bound = INVALID_EDGE_WEIGHT)
{
(void)duration_upper_bound; // TODO: limiting search radius is not implemented for MLD
NodeID source_node, target_node;
std::vector<EdgeID> unpacked_edges;
std::tie(weight, source_node, target_node, unpacked_edges) = mld::search(
facade, forward_heap, reverse_heap, force_loop_forward, force_loop_reverse, phantom_nodes);
std::tie(weight, source_node, target_node, unpacked_edges) = mld::search(facade,
forward_heap,
reverse_heap,
force_loop_forward,
force_loop_reverse,
weight_upper_bound,
phantom_nodes);
if (weight != INVALID_EDGE_WEIGHT)
{
@@ -374,7 +379,7 @@ getNetworkDistance(const datafacade::ContiguousInternalMemoryDataFacade<Algorith
SearchEngineData<Algorithm>::QueryHeap & /*reverse_core_heap*/,
const PhantomNode &source_phantom,
const PhantomNode &target_phantom,
int /*duration_upper_bound*/)
EdgeWeight weight_upper_bound = INVALID_EDGE_WEIGHT)
{
forward_heap.Clear();
reverse_heap.Clear();
@@ -385,8 +390,13 @@ getNetworkDistance(const datafacade::ContiguousInternalMemoryDataFacade<Algorith
EdgeWeight weight;
NodeID source_node, target_node;
std::vector<EdgeID> unpacked_edges;
std::tie(weight, source_node, target_node, unpacked_edges) = search(
facade, forward_heap, reverse_heap, DO_NOT_FORCE_LOOPS, DO_NOT_FORCE_LOOPS, phantom_nodes);
std::tie(weight, source_node, target_node, unpacked_edges) = search(facade,
forward_heap,
reverse_heap,
DO_NOT_FORCE_LOOPS,
DO_NOT_FORCE_LOOPS,
weight_upper_bound,
phantom_nodes);
if (weight == INVALID_EDGE_WEIGHT)
return std::numeric_limits<double>::max();