public static BehaviourStatus PickupTarget(BtContext context)
{
if (!context.Agent.HasComponent <TargetEntityComponent>())
{
return(BehaviourStatus.Failed);
}
var targetId = context.Agent.GetComponent <TargetEntityComponent>().TargetId;
var lootableComponent = context.Engine.GetEntityById(targetId).GetComponent <LootableComponent>();
var itemComponent = context.Engine.GetEntityById(targetId).GetComponent <ItemComponent>();
if (lootableComponent == null || itemComponent == null)
{
return(BehaviourStatus.Failed);
}
var quantity = lootableComponent.LootAll();
var inventoryComponent = context.Agent.GetComponent <InventoryComponent>();
inventoryComponent.Add(itemComponent.ItemType, quantity);
var staminaCost = GetStaminaCost(itemComponent.ItemType);
context.Agent.GetComponent <StaminaComponent>().ReduceBy(staminaCost);
return(BehaviourStatus.Succeeded);
}
public static BehaviourStatus EatFoodFromInventory(BtContext context)
{
var inventoryComponent = context.Agent.GetComponent <InventoryComponent>();
if (!inventoryComponent.Has(ItemTypes.Food))
{
return(BehaviourStatus.Failed);
}
var healthComponent = context.Agent.GetComponent <HealthComponent>();
healthComponent.IncreaseBy(30);
inventoryComponent.Remove(ItemTypes.Food);
return(BehaviourStatus.Succeeded);
}
public static BehaviourStatus BuildHouse(BtContext context, int requiredStones, int requiredWood)
{
var inventoryComponent = context.Agent.GetComponent <InventoryComponent>();
if (!inventoryComponent.Has(ItemTypes.Stone, requiredStones) ||
!inventoryComponent.Has(ItemTypes.Wood, requiredWood))
{
return(BehaviourStatus.Failed);
}
var position = context.Agent.GetComponent <PositionComponent>().Position;
context.Engine.NewEntity()
.AddComponent(new RenderComponent(new StaticImage(Assets.House)))
.AddComponent(new PositionComponent(position))
.AddComponent(new ItemComponent(ItemTypes.House));
inventoryComponent.Remove(ItemTypes.Stone, requiredStones);
inventoryComponent.Remove(ItemTypes.Wood, requiredWood);
return(BehaviourStatus.Succeeded);
}
public static BehaviourStatus SetItemAsTarget(BtContext context, ItemTypes itemType)
{
var position = context.Agent.GetComponent <PositionComponent>();
var lootableNode = context.Engine
.GetNodes <ItemNode>()
.Where(x => x.ItemComponent.ItemType == itemType)
.OrderBy(x => Vector2.Distance(x.PositionComponent.Position, position.Position))
.FirstOrDefault();
if (lootableNode == null)
{
return(BehaviourStatus.Failed);
}
var targetComponent = new TargetEntityComponent {
TargetId = lootableNode.Entity.Id
};
context.Agent.AddComponent(targetComponent);
return(BehaviourStatus.Succeeded);
}
public static BehaviourStatus MoveToTargetEntity(BtContext context)
{
var movementComponent = context.Agent.GetComponent <MovementComponent>();
if (!context.Agent.HasComponent <TargetEntityComponent>())
{
movementComponent.Velocity = Vector2.Zero;
return(BehaviourStatus.Failed);
}
var position = context.Agent.GetComponent <PositionComponent>().Position;
var targetId = context.Agent.GetComponent <TargetEntityComponent>().TargetId;
var target = context.Engine.GetEntityById(targetId);
if (target == null)
{
movementComponent.Velocity = Vector2.Zero;
return(BehaviourStatus.Failed);
}
var targetPosition = target.GetComponent <PositionComponent>();
var distance = Vector2.Distance(position, targetPosition.Position);
if (distance < 2)
{
movementComponent.Velocity = Vector2.Zero;
return(BehaviourStatus.Succeeded);
}
var direction = new Vector2(targetPosition.Position.X - position.X, targetPosition.Position.Y - position.Y);
var velocity = Vector2.Normalize(direction) * 4;
movementComponent.Velocity = velocity;
return(BehaviourStatus.Running);
}
public static bool HasItem(BtContext context, ItemTypes itemType, int quantity)
{
return(context.Agent.GetComponent <InventoryComponent>().Has(itemType, quantity));
}
public static bool IsHealthLow(BtContext context)
{
return(context.Agent.GetComponent <HealthComponent>().Health < 50);
}
public static bool IsStaminaLow(BtContext context)
{
var staminaComponent = context.Agent.GetComponent <StaminaComponent>();
return(staminaComponent.Stamina < staminaComponent.MaxStamina / 3);
}
