OpenTTD
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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. |
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inlineprotected |
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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 305 of file mcf.cpp.
References Path::Detach(), Path::GetFlow(), Path::GetNode(), Path::GetNumChildren(), and Path::GetParent().
Referenced by MCF1stPass::MCF1stPass(), and MCF2ndPass::MCF2ndPass().
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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 259 of file mcf.cpp.
References LinkGraph::EdgeWrapper< Tedge >::Capacity(), DistanceMaxPlusManhattan(), job, max_saturation, and LinkGraphJob::Size().
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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 336 of file mcf.cpp.
References Path::AddFlow(), Clamp(), and job.
Referenced by MCF1stPass::MCF1stPass(), and MCF2ndPass::MCF2ndPass().