/// <summary>
/// 有限状态机状态轮询时调用。
/// </summary>
/// <param name="fsm">有限状态机引用。</param>
/// <param name="elapseSeconds">逻辑流逝时间，以秒为单位。</param>
/// <param name="realElapseSeconds">真实流逝时间，以秒为单位。</param>
protected override void OnUpdate(IFsm <Monster> fsm, float elapseSeconds, float realElapseSeconds)
{
base.OnUpdate(fsm, elapseSeconds, realElapseSeconds);
if (fsm.Owner.IsAtkCDing || GlobalGame.IsPause)
{
return;
}
if (fsm.Owner.IsLockingAim)
{
FightEntity aim = fsm.Owner.LockingAim;
if (aim == null || aim.IsDead)
{
ChangeState <MonsterIdleState>(fsm);
return;
}
float distance = AIUtility.GetDistance(fsm.Owner, aim);
/* 进入攻击范围，直接攻击 */
if (fsm.Owner.CheckInAtkRange(distance))
{
fsm.SetData <VarInt> (Constant.EntityData.LockAimID, aim.Entity.Id);
ChangeState <MonsterAtkState> (fsm);
}
/* 在视线范围内，则继续移动 */
else if (fsm.Owner.CheckInSeekRange(distance))
{
if (fsm.CurrentState.GetType() != typeof(MonsterWalkState))
{
ChangeState <MonsterWalkState>(fsm);
}
}
else
{
fsm.Owner.UnlockAim();
}
return;
}
/* 判断是否有敌人进入追踪或攻击范围 */
CampType camp = fsm.Owner.GetImpactData().Camp;
GameObject[] aims = GameObject.FindGameObjectsWithTag("Creature");
foreach (GameObject obj in aims)
{
FightEntity aim = obj.GetComponent <FightEntity> ();
if (aim.IsDead == false &&
AIUtility.GetRelation(aim.GetImpactData().Camp, camp) == RelationType.Hostile)
{
float distance = AIUtility.GetDistance(fsm.Owner, aim);
/* 进入攻击范围，直接攻击 */
if (fsm.Owner.CheckInAtkRange(distance))
{
fsm.SetData <VarInt> (Constant.EntityData.LockAimID, aim.Entity.Id);
ChangeState <MonsterAtkState> (fsm);
break;
}
/* 进入追踪范围，向目标移动 */
else if (fsm.Owner.CheckInSeekRange(distance))
{
fsm.Owner.LockAim(aim);
ChangeState <MonsterWalkState>(fsm);
break;
}
}
}
}