public int[] Dijkstra(int startVertex, int endVertex)
{
int[] predecessors = new int[size]; //Definisemo prethodni cvor svakog elementa u najkracem putu i onda cemo unazad procitati, tj. iscrtati put
for (int i = 0; i < size; i++)
{
predecessors[i] = -1;
}
double[] priceTo = new double[size];// Pamti cenu od poocetnog do i-tog cvora.
//Postavljamo sve ceneDo u pocetku na "beskonacno", nama je ok da bude negativna vrednost, posto su sve tezine pozitivne.
SortedSet <IncomingPath> paths = new SortedSet <IncomingPath>(); //Skladistimo predjene puteve
double infinity = 1.7976931348623157E+308;
for (int i = 0; i < size; i++)
{
priceTo[i] = infinity;
}
priceTo[startVertex] = 0;
paths.Add(new IncomingPath(startVertex, 0));
while (paths.Count != 0)
{
IncomingPath v = paths.Min;
paths.Remove(v);
int previousVertex = v.getVertex();
double previousWeight = v.getWeight();
for (int i = 0; i < adjList[previousVertex].Count; i++)
{
int tmpVertex = adjList[previousVertex][i].Item1;
double edge = adjList[previousVertex][i].Item2;
double currentPrice = priceTo[previousVertex] + edge;
if (currentPrice < priceTo[tmpVertex])
{
paths.Remove(new IncomingPath(tmpVertex, priceTo[tmpVertex])); //Brisemo trenutni put do cvora, da ne bismo prolazili posle opet kroz sve susede
priceTo[tmpVertex] = currentPrice;
paths.Add(new IncomingPath(tmpVertex, priceTo[tmpVertex])); // Dodali smo novi najkraci put nakon promene
predecessors[tmpVertex] = previousVertex; //Znamo da je prethodni cvor koji je vodio do naseg trenutnog cvora, zapravo ovaj cvor
}
}
}
return(predecessors);
}
public int CompareTo(Object obj)
{
IncomingPath second = obj as IncomingPath;
return(this.weight.CompareTo(second.weight));
}
