//internal double[] GetDistancesToAcceptingStates(int[] sources,int[] acceptingStates)
internal double[] GetDistancesToAcceptingStates(int[] acceptingStates)
{
if (MustEdges == null)
{
return(null);
}
//calculate distances from accepting states
//by running shortest paths on the reversed graph
Edge[] reversedEdges = new Edge[MustEdges.Length];
for (int i = 0; i < reversedEdges.Length; i++)
{
Edge l = MustEdges[i];
reversedEdges[i] = new Edge(l.target, l.source, l.label, l.weight);
}
BasicGraph basicGraph = new BasicGraph(0, reversedEdges);
MultipleSourcesShortestPaths mssp = new MultipleSourcesShortestPaths(basicGraph, acceptingStates);
mssp.Calculate();
double[] exps = new double[NumberOfVertices];
for (int i = 0; i < NumberOfVertices; i++)
{
exps[i] = mssp.GetDistTo(i);
}
return(exps);
}
/// <summary>
/// Returns a strategy to reach targets from a vertex.
/// </summary>
/// <param name="vertex"></param>
/// <returns></returns>
internal Strategy[] GetStrategyReachableFromVertex(int vertex)
{
Strategy [] strategies = this.GetStrategies();
if (VertIsNondet(vertex))
{
throw new ArgumentException("vertex is a choice point");
}
//ArrayList links=new ArrayList();
HSet linkSet = new HSet();
foreach (Strategy s in strategies)
{
if (s.edge != null)
{
linkSet.Insert(s.edge);
if (VertIsNondet(s.edge.target))
{
foreach (Edge l in graph.EdgesAtVertex(s.edge.target))
{
linkSet.Insert(l);
}
}
}
}
BasicGraph bg = new BasicGraph(0, linkSet.ToArray(typeof(Edge)));
bool [] reachables = bg.GetReachableArray(vertex);
for (int i = 0; i < reachables.Length; i++)
{
if (reachables[i] == false)
{
strategies[i].edge = null;
}
}
return(strategies);
}
