public int CompareTo(object obj)
{
GraphEdge cobj = obj as GraphEdge;
return(Weights.CompareTo(cobj.Weights));
}
public override List <GraphEdge> MiniDistance_BSF(int startidx, int destidx)
{
if (startidx < 0 && startidx >= NodesCount)
{
return(new List <GraphEdge>());
}
if (destidx < 0 && destidx >= NodesCount)
{
return(new List <GraphEdge>());
}
if (startidx == destidx)
{
return(new List <GraphEdge>());
}
Queue.Queue961 <int> queue = new Queue961 <int>();
queue.enqueue(startidx);
int[] visitednodes = new int[NodesCount];
int[] parentpathnodes = new int[NodesCount];
int[] nodedistance = new int[NodesCount];
for (int i = 0; i < NodesCount; i++)
{
nodedistance[i] = int.MaxValue;
visitednodes[i] = 0;
parentpathnodes[i] = -1;
}
visitednodes[startidx] = 1;
nodedistance[startidx] = 0;
while (!queue.isEmpty())
{
var curidx = queue.dequeue();
var neighbourenodes = getNeighbourNodes(curidx);
for (int i = 0; i < neighbourenodes.Count; i++)
{
int nodeidx = neighbourenodes[i];
if (visitednodes[nodeidx] == 0)
{
visitednodes[nodeidx] = 1; //已访问
nodedistance[nodeidx] = nodedistance[curidx] + 1;
parentpathnodes[nodeidx] = curidx;
if (nodeidx == destidx) //找到跳出循环
{
queue.clear();
break;
}
queue.enqueue(nodeidx);
}
}
}
List <GraphEdge> edges = new List <GraphEdge>();
int pathendidx = destidx;
while (parentpathnodes[pathendidx] >= 0)
{
GraphEdge edge = new GraphEdge {
Weights = 1, StartNode = _nodesarray[parentpathnodes[pathendidx]], EndNode = _nodesarray[pathendidx]
};
pathendidx = parentpathnodes[pathendidx];
edges.Insert(0, edge);
}
return(edges);
}