protected virtual StateActionsCollection getActions(TravelSearchState state)
{
//basic :only pickup water and drive
TravelWorld world = state.ToWorld();
StateActionsCollection res = new StateActionsCollection();
if (CanPickupWaterNow(ref state, world))
{
if (!_actionsMap.ContainsKey(PickupWater))
{
ActionType action = pickupWater;
StateActionType stateAction = PickupWater;
_actionsMap.Add(stateAction, action);
}
res.Add(PickupWater);
}
var actions = getDriveActions(state, world);
foreach (var action in actions)
{
var stateAction = ConvertToStateAction(action);
_actionsMap.Add(stateAction, action);
res.Add(stateAction);
}
return(res);
}
protected TravelSearchState ToSearchState(TravelWorld newWorld)
{
var newState = new TravelSearchState();
newState.CarryWatter = CarryWater;
newState.CurrentLocation = CurrentLocation;
newState.WaterPlaces = new List <int>(newWorld.GetWaterPlaces());
newState.FireWays = new List <TravelEdge>(newWorld.GetFireWays());
newState.WorldGraph = newWorld.GetGraph();
return(newState);
}
private SearchStateAndCost rollBackAction(TravelSearchState state, ActionType action)
{
backup();
CurrentLocation = state.CurrentLocation;
CarryWater = state.CarryWatter;
var newWorld = state.ToWorld();
bool sucseed = action(newWorld);
if (!sucseed)
{
throw new WrongActionException();
}
var neweState = ToSearchState(newWorld);
double cost = _cost - _prevCost;
rollBack();
return(new SearchStateAndCost(neweState, cost));
}
protected IEnumerable <ActionType> getDriveActions(TravelSearchState state, TravelWorld world)
{
List <ActionType> res = new List <ActionType>();
IEnumerable <TravelEdge> ways;
if (state.CarryWatter)
{
ways = world.GetWays(state.CurrentLocation);
}
else
{
ways = world.GetClearWays(state.CurrentLocation);
}
foreach (var way in ways)
{
int dest = way.getAnotherPlace(state.CurrentLocation);
var action = new ActionType(w => drive(w, dest));
res.Add(action);
}
return(res);
}
protected bool CanPickupWaterNow(ref TravelSearchState state, TravelWorld world)
{
return(!state.CarryWatter && world.HaveWater(state.CurrentLocation));
}
protected SearchStateAndCost PickupWater(TravelSearchState state)
{
return(rollBackAction(state, pickupWater));
}