private double SafeCost(Node destination, CostStrategy strategy)
{
var result = Cost(destination, NoVisitedNodes(), strategy);
if (result == Unreachable)
{
throw new InvalidOperationException("Unreachable destination");
}
return(result);
}
internal double Cost(Node destination, List <Node> visitedNodes, CostStrategy strategy)
{
if (this == destination)
{
return(0);
}
if (visitedNodes.Contains(this))
{
return(Unreachable);
}
if (this._links.Count == 0)
{
return(Unreachable);
}
return(_links
.ConvertAll(link => link.Cost(destination, CopyWithThis(visitedNodes), strategy))
.Min());
}
internal double Cost(Node destination, List <Node> visitedNodes, CostStrategy strategy)
{
return(_target.Cost(destination, visitedNodes, strategy) + strategy(_cost));
}
