Enemy状态以及切换图

程序架构

• 接口

public interface IState 
{void OnEnter(); //进入状态时void OnUpdate();//执行状态时void OnExit(); //退出状态时
}

• 接口实现及状态切换类

public class IdleState : IState
{private FSM manager;private Parameter parameter;public float timer;public IdleState(FSM manager){this.manager = manager;this.parameter = manager.parameter;}public void OnEnter(){parameter.animator.Play("Idle");}public void OnUpdate(){timer += Time.deltaTime; //加上上一帧经过的时间if(parameter.target != null &&parameter.target.position.x >= parameter.chasePoints[0].position.x &&parameter.target.position.x <= parameter.chasePoints[1].position.x){manager.TransitionState(StateType.React);  //发现敌人，切换为反应状态}if(timer >= parameter.idleTime) //达到状态机设置好的时间{manager.TransitionState(StateType.Patrol);  //转换为巡逻状态}}public void OnExit(){timer = 0; //退出时计时器清0}
}
...

• 状态机注册和切换函数类

public enum StateType
{Idle, Patrol, Chase, React, Attack, Hit, Death
}public class FSM : MonoBehaviour
{private IState currentState;  //当前状态private Dictionary<StateType, IState> states = new Dictionary<StateType, IState>(); //注册状态字典public Parameter parameter;void Start(){//注册状态states.Add(StateType.Idle, new IdleState(this));states.Add(StateType.Patrol, new PatrolState(this));states.Add(StateType.Chase, new ChaseState(this));states.Add(StateType.React, new ReactState(this));states.Add(StateType.Attack, new AttackState(this));states.Add(StateType.Hit, new HitState(this));states.Add(StateType.Death, new DeathState(this));TransitionState(StateType.Idle);  //设置初始状态parameter.animator = transform.GetComponent<Animator>(); //设置动画控制器}void Update(){currentState.OnUpdate(); //在当前状态中，持续执行当前的函数}public void TransitionState(StateType type){if (currentState != null)currentState.OnExit();    //退出当前状态currentState = states[type];currentState.OnEnter();  //进入新状态}...
}