//攻击玩家一次
protected IEnumerator AttackState()
{
attacking = true;
curState = NpcEnemyState.Attack;
onAttack?.Invoke();
rb.velocity = Vector2.zero;
//InAttack();
while (true)
{
yield return(continueState);
if (!attacking)
{
StartCoroutine(AttackIntervalTimer());
if (BackCondition)
{
StartCoroutine(BackState());
yield break;
}
else
{
StartCoroutine(ChaseState());
yield break;
}
}
if (HurtCondition)
{
StartCoroutine(HurtState());
yield break;
}
}
}
//追逐状态，追逐玩家，如果长时间没追到则放弃
protected IEnumerator ChaseState()
{
curState = NpcEnemyState.Chase;
onChase?.Invoke();
while (true)
{
var detx = target.position.x - transform.position.x;
if (Mathf.Abs(detx) > 0.2f)
{
SetVelocityX(chaseSpeed, detx);
}
else
{
rb.velocity = Vector2.zero;
}
yield return(continueState);
if (AttackCondition)
{
StartCoroutine(AttackState());
yield break;
}
if (BackCondition)
{
StartCoroutine(BackState());
yield break;
}
if (HurtCondition)
{
StartCoroutine(HurtState());
yield break;
}
}
}
//巡逻状态，朝着巡逻点数组的下一个地点移动
protected IEnumerator PatrolState()
{
curState = NpcEnemyState.Patrol;
onPatrol?.Invoke();
while (true)
{
var dir = patrolPos[targetIndex] - transform.position.x;
SetVelocityX(patrolSpeed, dir);
if (dir < 0.1f && dir > -0.1f)
{
targetIndex = (targetIndex + 1) % patrolPos.Count;
}
yield return(continueState);
if (ChaseCondition)
{
StartCoroutine(ChaseState());
yield break;
}
if (HurtCondition)
{
StartCoroutine(HurtState());
yield break;
}
}
}
IEnumerator DieState()
{
curState = NpcEnemyState.Die;
onDie?.Invoke();
rb.velocity = Vector2.zero;
GetComponent <Collider2D>().enabled = false;
while (true)
{
yield return(continueState);
if (IsAlive)
{
GetComponent <Collider2D>().enabled = true;
transform.position = bornPos;
StartCoroutine(PatrolState());
yield break;
}
}
}
protected IEnumerator HurtState()
{
getHurt = false;
curState = NpcEnemyState.Hurt;
onHurt?.Invoke((Vector2)hurtInfo[0] - (Vector2)transform.position);
GetHurt((float)hurtInfo[1]);
StartCoroutine(InvincibleCoroutine());
while (true)
{
yield return(continueState);
if (!IsAlive)
{
StartCoroutine(DieState());
yield break;
}
else if (hurted)
{
hurted = false;
StartCoroutine(ChaseState());
yield break;
}
}
}
//没追到玩家后返回继续巡逻
protected IEnumerator BackState()
{
curState = NpcEnemyState.Back;
invincible = true;
onBack?.Invoke();
while (true)
{
SetVelocityX(patrolSpeed, bornPos.x - transform.position.x);
yield return(continueState);
if (Mathf.Abs(bornPos.x - transform.position.x) < 0.05f)
{
invincible = false;
StartCoroutine(PatrolState());
yield break;
}
if (HurtCondition)
{
StartCoroutine(HurtState());
yield break;
}
}
}
