Multi-commodity flow calculating base class. More...
#include <mcf.h>
Protected Member Functions | |
MultiCommodityFlow (LinkGraphJob &job) | |
Constructor. | |
template<class Tannotation , class Tedge_iterator > | |
void | Dijkstra (NodeID from, PathVector &paths) |
A slightly modified Dijkstra algorithm. | |
uint | PushFlow (Edge &edge, Path *path, uint accuracy, uint max_saturation) |
Push flow along a path and update the unsatisfied_demand of the associated edge. | |
void | CleanupPaths (NodeID source, PathVector &paths) |
Clean up paths that lead nowhere and the root path. | |
Protected Attributes | |
LinkGraphJob & | job |
Job we're working with. | |
uint | max_saturation |
Maximum saturation for edges. |
Multi-commodity flow calculating base class.
Definition at line 14 of file mcf.h.
MultiCommodityFlow::MultiCommodityFlow | ( | LinkGraphJob & | job | ) | [inline, protected] |
void MultiCommodityFlow::CleanupPaths | ( | NodeID | source_id, | |
PathVector & | paths | |||
) | [protected] |
Clean up paths that lead nowhere and the root path.
source_id | ID of the root node. | |
paths | Paths to be cleaned up. |
Definition at line 284 of file mcf.cpp.
References Path::Detach(), Path::GetFlow(), Path::GetNode(), Path::GetNumChildren(), and Path::GetParent().
Referenced by MCF1stPass::MCF1stPass(), and MCF2ndPass::MCF2ndPass().
void MultiCommodityFlow::Dijkstra | ( | NodeID | source_node, | |
PathVector & | paths | |||
) | [protected] |
A slightly modified Dijkstra algorithm.
Grades the paths not necessarily by distance, but by the value Tannotation computes. It uses the max_saturation setting to artificially decrease capacities.
Tannotation | Annotation to be used. | |
Tedge_iterator | Iterator to be used for getting outgoing edges. |
source_node | Node where the algorithm starts. | |
paths | Container for the paths to be calculated. |
Definition at line 239 of file mcf.cpp.
References LinkGraph::EdgeWrapper< Tedge >::Capacity(), LinkGraph::EdgeWrapper< Tedge >::Distance(), job, max_saturation, and LinkGraphJob::Size().
uint MultiCommodityFlow::PushFlow | ( | Edge & | edge, | |
Path * | path, | |||
uint | accuracy, | |||
uint | max_saturation | |||
) | [protected] |
Push flow along a path and update the unsatisfied_demand of the associated edge.
edge | Edge whose ends the path connects. | |
path | End of the path the flow should be pushed on. | |
accuracy | Accuracy of the calculation. | |
max_saturation | If < UINT_MAX only push flow up to the given saturation, otherwise the path can be "overloaded". |
Definition at line 315 of file mcf.cpp.
References Path::AddFlow(), Clamp(), and job.
Referenced by MCF1stPass::MCF1stPass(), and MCF2ndPass::MCF2ndPass().