Exemplo n.º 1
0
 async private Task <List <StateView> > MakeResult(CancellationToken cancelToken)
 {
     return(await Task.Run(() =>
     {
         List <StateView> resultCollection = null;
         //Do not use this approach in enterprise!.
         StateFactory.SetNumberOfEach(NumberOfEach);
         var p = new Problem(StateFactory.Make(NumberOfEach, NumberOfEach, BoatState.Left, 0),
                             StateFactory.Make(0, 0, BoatState.Right, 0), BoatSize);
         var result = Algorithm.UniformCostSearch(p, cancelToken);
         if (result != null)
         {
             Stack <State> stack = new Stack <State>();
             while (result != null)
             {
                 stack.Push(result);
                 result = result.PrevState;
             }
             cancelToken.ThrowIfCancellationRequested();
             resultCollection = new List <StateView>(stack.Count);
             int n = 0;
             foreach (var state in stack)
             {
                 resultCollection.Add(new StateView(state, n++));
             }
             return resultCollection;
         }
         return new List <StateView>();
     }, cancelToken));
 }
Exemplo n.º 2
0
        public IEnumerable <State> GetSuccessors(State state)
        {
            var result = new List <State>();

            //loop through all possible combinations
            for (int nMiss = 0; nMiss <= _boatSize; nMiss++)
            {
                for (int nCan = 0; nCan <= _boatSize; nCan++)
                {
                    if (nMiss == 0 && nCan == 0)
                    {
                        continue;
                    }
                    if (nMiss + nCan > _boatSize)
                    {
                        break;
                    }
                    var BoatDirection = state.BoatOnTheSide.AsMultiplier();
                    var s             = StateFactory.Make(
                        state.Missionaries + nMiss * BoatDirection,
                        state.Cannibals + nCan * BoatDirection,
                        state.BoatOnTheSide.Inverse(),
                        state,
                        state.StateLevel + 1);
                    if (s.IsValidState())
                    {
                        result.Add(s);
                    }
                }
            }
            return(result);
        }