public ActionUtility(EntityAction action, Tuple <Need, double>[] values)
{
Action = action;
UtilityDeltas = values;
action.SetUtilityDeltas(UtilityDeltas);
}
public override void Do(Entity entity)
{
double squaredDistance = Utilities.SquaredDistance(entity.Position, fleeObject.Position);
if (squaredDistance < entity.VisionRange * entity.VisionRange)
{
double x = entity.Position.X + entity.Position.X - fleeObject.Position.X;
double y = entity.Position.Y + entity.Position.Y - fleeObject.Position.Y;
activeAction = new GotoAction(x, y, entity.Size);
activeAction.Do(entity);
}
else
{
entity.ApplyNeedDeltas(UtilityDeltas);
End();
}
if (activeAction != null && activeAction.State == ActionState.Failure) // If the entity has hit a wall while running away, head to a random point.
{
OrderedPair <int> randomPoint = Utilities.GetDirectionalPoint(entity.CollisionDirection, entity.Position);
activeAction = new GotoAction(randomPoint.X, randomPoint.Y, entity.Size);
}
}
public virtual bool TrySetAction(EntityAction newAction, bool locked = false)
{
if (Utilities.AreSameBaseType(Action, newAction)) // Don't assign an action of the same type.
{
return(false);
}
else
{
if (Action != null && !Action.IsActive)
{
Action.End();
}
Action = newAction;
ActionLocked = locked;
return(true);
}
}
public void DecideAction(Animal animal, List <GameObject> nearbyObjects)
{
List <ActionUtility> actionAds = nearbyObjects.
Where(o => o != animal)
.SelectMany(o => o.GetAdvertisedActions(animal, 0.0)).ToList();
actionAds.Add(new ActionUtility(animal.IdleAction, new Tuple <Need, double>[]
{
ActionUtility.NewPair(Need.JobFullfilment, 0.002)
}));
EntityAction attackerResponseAction;
// Add actions to respond to the attacker being nearby.
// Bears will always attack nearby entities, but wolves might not, and goats and hogs will not.
if (animal.Attacker != null && nearbyObjects.Contains(animal.Attacker))
{
if (animal.Type == AnimalType.Bear)
{
attackerResponseAction = new AttackAction(animal.Attacker);
}
// Wolves will fight back if it can win. I.e. it will take less ticks for the wolf to kill the attacker than for the
// attacker to kill the wolf.
else if (animal.Type == AnimalType.Wolf && animal.GetHealth() / animal.Attacker.Strength > animal.GetHealth() / animal.Strength)
{
attackerResponseAction = new AttackAction(animal.Attacker);
}
else
{
attackerResponseAction = new FleeAction(animal.Attacker);
}
actionAds.Add(new ActionUtility(attackerResponseAction, new Tuple <Need, double>[]
{
ActionUtility.NewPair(Need.JobFullfilment, DDeltaConfig.attackerResponseDelta)
}));
}
EntityAction bestAction = utilityDecider.GetBestAction(animal, actionAds);
if (!Utilities.AreSameBaseType(animal.Action, bestAction))
{
animal.TrySetAction(bestAction);
}
}
// Need to select action that gives the highest change to the lowest need values. 0.0 is max, 1.0 is min need.
// Returns best action for now...
public EntityAction GetBestAction(Entity entity, List <ActionUtility> actionAds)
{
double attenuator(double input)
{
return(5.0 / (input == 0.0 ? 0.000001 : input));
}
double attenuatorDelta(Tuple <Need, double> deltaPair)
{
double currentValue = entity.GetNeedValue(deltaPair.Item1);
double futureValue = currentValue + deltaPair.Item2;
return(attenuator(currentValue) - attenuator(futureValue));
}
Tuple <ActionUtility, double> createWeightPairs(ActionUtility actionUtility)
{
double weight = actionUtility.UtilityDeltas.Sum(deltaPair => attenuatorDelta(deltaPair));
Tuple <ActionUtility, double> weightedActionUtility = new Tuple <ActionUtility, double>(actionUtility, weight);
return(weightedActionUtility);
}
// Pair each ActionUtility from actionAds with its score from sumFunction. This applies the attenuation function f(x) = 10.0 / x
// to prioritize needs that are more important and favor actions that will reduce that need the most.
List <Tuple <ActionUtility, double> > weightedActionAds = actionAds
.Select(actionAd => createWeightPairs(actionAd))
.OrderByDescending(weightPair => weightPair.Item2) // Sort action advertisements by their weight value. Highest first.
.Take(3) // Take the top 3 from the list.
.ToList();
EntityAction action = WeightedRandomChoice(weightedActionAds).Action;
return(action);
// Assign a value to each action based on the increase in utility. Weight values nonlinearly based on the urgency of the need
// List.Sum(attenuator(currentNeed) - attenuator(futureNeed))
}
public void DoActionOnce(EntityAction action)
{
action.Do(this);
}
public override bool TrySetAction(EntityAction newAction, bool locked = false)
{
OnUpdateElement(ChangeType.UpdateElement, "Action", Action != null ? Action.GetName() : "None");
return(base.TrySetAction(newAction, locked));
}
// Uses the person's needs and the list of GameObjects that are nearby
public void DecideAction(Person person, List <GameObject> nearbyObjects, int personCount, int food, int mouseX, int mouseY)
{
//person.SetAction(new FollowMouseAction(mouseX, mouseY, housePosition, houseRectangle));
double personCountMod = (personCount == 0 ? 1.0 : food / (2 * personCount));
List <ActionUtility> actionAds = nearbyObjects
.Where(o => o != person)
// Kinda clunky but this will allow extra data to control action advertisements.
.SelectMany(o => o is Person ? o.GetAdvertisedActions(person, personCountMod) : o.GetAdvertisedActions(person, 0.0))
.ToList();
//if (personCount >= personLimit)
// actionAds = actionAds.Where(ad => !(ad.Action is MateAction)).ToList();
// Limit the number of people that can be present at one time. This would be more efficient as a check inside Person to prevent
// people from advertising a mate action if their are too many people.
if (personCount >= personLimit)
{
actionAds = actionAds.Where(au => !(au.Action is MateAction)).ToList();
}
double deliverFoodDelta = person.GetItemCount(ItemType.Apple) / 2;
// Return food to house.
actionAds.Add(new ActionUtility(new DeliverFoodAction(houseRectangle), new Tuple <Need, double>[]
{
ActionUtility.NewPair(Need.JobFullfilment, deliverFoodDelta)
}));
// Wander around.
actionAds.Add(new ActionUtility(person.IdleAction, new Tuple <Need, double>[]
{
ActionUtility.NewPair(Need.JobFullfilment, DDeltaConfig.idleActionAdvertisement)
}));
// Hunger need.
if ((person.GetItemCount(ItemType.Apple) > 0 || food > 0) && person.Hunger <= 0.5)
{
actionAds.Add(new ActionUtility(new EatAction(), new Tuple <Need, double>[]
{
ActionUtility.NewPair(Need.Hunger, 1.0 - person.Hunger)
}));
}
// Tiredness need.
if ((person.Tiredness < 0.6 || person.Health < 50) && !person.AttackerInRange()) // Sleep required. ** Add check to see if attacker is nearby **.
{
actionAds.Add(new ActionUtility(new SleepAction(Person.sleepSeconds, true), new Tuple <Need, double>[]
{
ActionUtility.NewPair(Need.Tiredness, DDeltaConfig.sleepActionAdvertisement),
ActionUtility.NewPair(Need.Health, DDeltaConfig.sleepHealthAdvertisement)
}));
}
else // Napping optional. This should be picked more often unless there are a lot of other actions to pick.
{
actionAds.Add(new ActionUtility(new SleepAction(Person.napSeconds, false), new Tuple <Need, double>[]
{
ActionUtility.NewPair(Need.Tiredness, DDeltaConfig.napActionDelta)
}));
}
if (person.GetRectangleF().IntersectsWith(houseRectangle))
{
actionAds.Add(dropUtility);
}
EntityAction attackerResponseAction;
if (person.Attacker != null && nearbyObjects.Contains(person.Attacker))
{
if (person.Sex == Sex.Male && person.GetHealth() / person.Attacker.Strength > person.GetHealth() / person.Strength)
{
attackerResponseAction = new AttackAction(person.Attacker);
}
else
{
attackerResponseAction = new FleeAction(person.Attacker);
}
actionAds.Add(new ActionUtility(attackerResponseAction, new Tuple <Need, double>[]
{
ActionUtility.NewPair(Need.JobFullfilment, DDeltaConfig.attackerResponseDelta)
}));
}
// *** Apply action ad filters here from EntitController's tasks ***
ApplyTaskFilters(actionAds);
// NOTE: Doesn't filter actions that give 0.0 delta or a negative!
EntityAction bestAction = utilityDecider.GetBestAction(person, actionAds);
if (!Utilities.AreSameBaseType(person.Action, bestAction))
{
if (!(bestAction is WanderAction)) // Remove leftover velocity from a WanderAction.
{
person.Stop();
}
person.TrySetAction(bestAction);
}
}
public void AddTask(EntityAction taskAction, double mod)
{
Tasks.Add(new Task(taskAction, mod));
}
public void ForceAction(Entity entity, EntityAction action)
{
action.Do(entity);
}
public Task(EntityAction action, double mod)
{
Action = action;
ActionMod = mod;
}
public FleeAction(GameObject entity) : base(true)
{
fleeObject = entity;
idleAction = new WanderAction();
}
// Cause the entity to wait and schedule when it can move again with an additional action.
public WaitAction(int seconds, EntityAction action, bool interruptible = true) : base(seconds, interruptible)
{
IsInterruptible = interruptible;
finalAction = action;
}
// Cause the entity to wait and schedule when it can move again.
public WaitAction(int seconds, bool interruptible = true) : base(seconds, interruptible)
{
IsInterruptible = interruptible;
finalAction = null;
}
