public void exchange(int i, int j)
{
NodeD temp = nodeList[i];
nodeList[i] = nodeList[j];
nodeList[j] = temp;
}
public List <int> Dijkstra(ref int[] pi, ref List <NodeD> G, int s)
{
InitializeSingleSource(ref pi, ref G, s);
List <int> S = new List <int>();
PriorityQueue Q = new PriorityQueue(G);
Q.buildHeap();
while (Q.size() != 0)
{
NodeD u = Q.extractMin();
S.Add(u.ID);
for (int i = 0; i < u.Adjacency.Count; i++)
{
NodeD v = u.Adjacency[i];
int w = u.Weights[i];
Relax(ref pi, u, ref v, w);
}
}
return(S);
}
void Relax(ref int[] pi, NodeD u, ref NodeD v, int w)
{
if (v.Distance > u.Distance + w)
{
v.Distance = u.Distance + w;
pi[v.ID] = u.ID;
}
}
int heapSearch(NodeD node)
{
for (int i = 0; i < heapSize; i++)
{
NodeD aNode = nodeList[i];
if (node.ID == aNode.ID)
{
return(i);
}
}
return(-1);
}
public int find(NodeD node)
{
return(heapSearch(node));
}