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NOT FINISHED : Dijkstra

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Sebastien Moll 2026-04-20 06:39:27 +02:00
parent f42e7edf5f
commit fa87e8d63b
2 changed files with 27 additions and 21 deletions
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38
be-graphes-algos/src/main/java/org/insa/graphs/algorithm/shortestpath/DijkstraAlgorithm.java
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@ -41,28 +41,34 @@ public class DijkstraAlgorithm extends ShortestPathAlgorithm {
concurentNodeLabel.setCoutRealise(0);
concurentNodeLabel.setMarque();
notifyOriginProcessed(data.getOrigin());
BinaryHeap<Label> labelsHeap = new BinaryHeap<Label>();
labelsHeap.insert(concurentNodeLabel);
boolean found = false;
for (int i = 0; !found && i < nbNodes; ++i) {
for (Arc arc : concurentNodeLabel.getSommetCourant().getSuccessors()) {
Label successorLabel = labelsList.get(arc.getDestination().getId());
successorLabel.setCoutRealise(arc.getLength());
// GERER LA SOMME DES COUTS POUR LE NOUVEAU ALBEL
if (arc.getLength() < successorLabel.getCost()) {
labelsHeap.remove(successorLabel);
}
successorLabel.setPere(arc);
labelsHeap.insert(successorLabel);
}
concurentNodeLabel = labelsHeap.deleteMin();
concurentNodeLabel.setMarque();
if (destinationNodeLabel.getMarque()) {
found = true;
}
while (!found && !labelsHeap.isEmpty()) {
concurentNodeLabel = labelsHeap.deleteMin();
if (!concurentNodeLabel.getMarque()) {
notifyNodeReached(concurentNodeLabel.getSommetCourant());
concurentNodeLabel.setMarque();
for (Arc arc : concurentNodeLabel.getSommetCourant().getSuccessors()) {
Label successorLabel = labelsList.get(arc.getDestination().getId());
Float newCost = arc.getLength() + concurentNodeLabel.getCost();
if (newCost < successorLabel.getCost()) {
successorLabel.setPere(arc);
successorLabel.setCoutRealise(newCost);
labelsHeap.insert(successorLabel);
}
}
if (destinationNodeLabel.getMarque()) {
found = true;
}
}
}
notifyDestinationReached(data.getDestination());
ArrayList<Arc> pathArcs = new ArrayList<Arc>();
concurentNodeLabel = destinationNodeLabel;
while(concurentNodeLabel.getPere() != null) {

8
be-graphes-algos/src/main/java/org/insa/graphs/algorithm/shortestpath/Label.java
View file

@ -39,9 +39,9 @@ public class Label implements Comparable<Label> {
this.pere = pere;
}
public double getCoutRealise() {
return coutRealise;
}
// public double getCoutRealise() {
// return coutRealise;
// }
public void setCoutRealise(float nouveauCout) {
this.coutRealise = nouveauCout;
@ -53,7 +53,7 @@ public class Label implements Comparable<Label> {
@Override
public int compareTo(Label o) {
return Double.compare(this.coutRealise, o.getCoutRealise()) ;
return Double.compare(this.coutRealise, o.getCost()) ;
}