// Usage.
public void UseAbility(IAttackAbilityPresentation abilityPresentation, UnitPresentation target)
{
if (attacks.TryGetValue(abilityPresentation, out IAttackAbility ability))
{
ability.Use(target);
}
}
// Acting.
private protected override void OnAct(out GoalStatus goalStatus)
{
var owner = Owner;
var context = Context;
if (owner is null || context is null)
{
goalStatus = GoalStatus.Active;
return;
}
// Check if target is down.
if (Goal.Target.Durability.Fallen)
{
goalStatus = GoalStatus.Achieved;
return;
}
// Check if already attacking.
if (owner.Condition is IAttackConditionPresentation currentAttack && currentAttack.Target == Goal.Target)
{
goalStatus = GoalStatus.Active;
return;
}
// Choose attack ability.
IAttackAbilityPresentation chosenAttack = null;
foreach (var attackAbility in owner.AbilityCollection.Attacks)
{
if (chosenAttack == null || attackAbility.DamagePerSecond.DamageValue > chosenAttack.DamagePerSecond.DamageValue)
{
chosenAttack = attackAbility;
}
}
if (chosenAttack == null)
{
goalStatus = GoalStatus.Failed;
return;
}
// Check if target is reached.
var currentPosition = owner.Body.Position;
var targetPosition = Goal.Target.Body.Position;
if ((currentPosition - targetPosition).magnitude <= chosenAttack.AttackRange)
{
var abilityUsage = new AttackUsageAction(chosenAttack, Goal.Target);
owner.PlanAction(abilityUsage);
goalStatus = GoalStatus.Active;
return;
}
// Reach target.
if (relocation == null)
{
var goal = new RelocationGoal(targetPosition);
relocation = new RelocationBehaviour(goal, this);
}
relocation.Act(out GoalStatus relocationStatus);
if (relocationStatus == GoalStatus.Failed)
{
goalStatus = GoalStatus.Failed;
return;
}
if (relocationStatus == GoalStatus.Achieved)
{
relocation = null;
}
goalStatus = GoalStatus.Active;
}
