//guard状态机更新函数
void FSMUpdate()
{
//根据guard当前的状态调用相应的状态处理函数
switch (currentState)
{
case GuardFSMState.Idle:
UpdateIdleState();
break;
case GuardFSMState.Chase:
UpdateChaseState();
break;
case GuardFSMState.Attack:
UpdateAttackState();
break;
case GuardFSMState.Dead:
UpdateDeadState();
break;
}
//如果guard处于非死亡状态，但是生命值减为0，那么进入死亡状态
if (currentState != GuardFSMState.Dead && !guardHealth.IsAlive)
{
currentState = GuardFSMState.Dead;
}
}
//进攻状态定时更新
void UpdateAttackState()
{
//如果guard感知范围内没有玩家，进入游荡状态
targetPlayer = guardSensor.getNearbyPlayer();
if (targetPlayer == null)
{
currentState = GuardFSMState.Idle;
agent.ResetPath();
animator.SetBool("isAttack", false);
return;
}
//如果玩家与guard的距离，大于guard的攻击距离，那么进入追踪状态
if (Vector3.Distance(targetPlayer.position, guardTransform.position) > attackRange)
{
currentState = GuardFSMState.Chase;
agent.ResetPath();
animator.SetBool("isAttack", false);
return;
}
PlayerHealth ph = targetPlayer.GetComponent <PlayerHealth> ();
if (ph != null)
{
//计算guard的正前方和玩家的夹角，只有玩家在guard前方才能攻击
Vector3 direction = targetPlayer.position - guardTransform.position;
float degree = Vector3.Angle(direction, guardTransform.forward);
if (degree < attackFieldOfView / 2 && degree > -attackFieldOfView / 2)
{
animator.SetBool("isAttack", true);
if (attackTimer > attackInterval)
{
attackTimer = 0;
if (attackAudio != null)
{
photonView.RPC("PlayAttackAudio", PhotonTargets.All);
}
ph.TakeDamageFromZombie(attackDamage);
}
attackTimer += Time.deltaTime;
}
else
{
//如果玩家不在guard前方，guard需要转向后才能攻击
animator.SetBool("isAttack", false);
guardTransform.LookAt(targetPlayer);
}
}
//攻击状态下的敌人应当连续追踪玩家
agent.SetDestination(targetPlayer.position);
//限制追踪的速度
setMaxAgentSpeed(runSpeed);
}
//同步数据函数
void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
{
if (stream.isWriting) //本地玩家发送数据
{
stream.SendNext(currentState); //同步当前状态 是否第一次进入死亡状态 和动画机的rootMotion标记
stream.SendNext(firstInDead);
stream.SendNext(animator.applyRootMotion);
}
else //远程玩家接收数据
{
currentState = (GuardFSMState)stream.ReceiveNext();
firstInDead = (bool)stream.ReceiveNext();
animator.applyRootMotion = (bool)stream.ReceiveNext();
}
}
//相当于让守护者开始工作
public void Born()
{
//把guard感知到的玩家字段设置为null血量
targetPlayer = null;
//把guard的初始化状态设置为游荡状态，
currentState = GuardFSMState.Idle;
//初始化guard生命值
guardHealth.currentHP = guardHealth.maxHP;
//启用导航代理组件
EnableGuard(true);
if (PhotonNetwork.isMasterClient)
{
agent.ResetPath();
}
//启用动画控制器
animator.applyRootMotion = false;
firstInDead = true;
}
//空闲状态处理函数
void UpdateIdleState()
{
targetPlayer = guardSensor.getNearbyPlayer();
if (targetPlayer != null)
{
currentState = GuardFSMState.Chase;
agent.ResetPath();
animator.SetBool("isAttack", false);
return;
}
//设置移动目标为守护原点
agent.SetDestination(SourcePointTransform.position);
if (AgentDone()) //回到了守护原点
{
setMaxAgentSpeed(0);
}
else
{
setMaxAgentSpeed(runSpeed);
}
}
//追踪状态处理函数
void UpdateChaseState()
{
//如果guard感知范围内没有玩家，进入游荡状态
targetPlayer = guardSensor.getNearbyPlayer();
if (targetPlayer == null)
{
currentState = GuardFSMState.Idle;
agent.ResetPath();
return;
}
//如果玩家与guard的距离，小于guard的攻击距离，那么进入攻击状态
if (Vector3.Distance(targetPlayer.position, guardTransform.position) <= attackRange)
{
currentState = GuardFSMState.Attack;
agent.ResetPath();
return;
}
//设置移动目标为玩家
agent.SetDestination(targetPlayer.position);
//限制追踪的速度
setMaxAgentSpeed(runSpeed);
}
