Unity3D优化技巧系列八

标签：社区   return   term   手把手教你   net   如何   string   实现   lin   

笔者介绍：姜雪伟，IT公司技术合伙人，IT高级讲师，CSDN社区专家，特邀编辑，畅销书作者，国家专利发明人;已出版书籍：《手把手教你架构3D游戏引擎》电子工业出版社和《Unity3D实战核心技术详解》电子工业出版社等。

CSDN视频网址：http://edu.csdn.net/lecturer/144

下面给读者讲解在游戏开发中经常使用的FSM有限状态机的实现，有限状态机在状态切换中使用的非常多，比如足球游戏，动作游戏等。角色在游戏场景中经常需要动作的切换，比如Idle，Run，Attack，Skill等，这些技能状态之间的切换，我们通常会使用FSM去处理。我们在游戏中将动作切换和技能切换放在一起使用FSM处理，下面通过代码的方式给读者进行封装处理：

	public interface EntityFSM
	{
		bool CanNotStateChange{set;get;}
		FsmState State { get; }
		void Enter(Ientity entity , float stateLast);
		bool StateChange(Ientity entity , EntityFSM state);
		void Execute(Ientity entity);
		void Exit(Ientity Ientity);
	}

	public enum FsmState 
	{
		FSM_STATE_FREE,
		FSM_STATE_RUN,
       		 FSM_STATE_SING,
		FSM_STATE_RELEASE,
        	FSM_STATE_LEADING,
        	FSM_STATE_LASTING,
		FSM_STATE_DEAD,
       	 	FSM_STATE_ADMOVE,
        	FSM_STATE_FORCEMOVE,
        	FSM_STATE_RELIVE,
        	FSM_STATE_IDLE,
	}

 public class EntityIdleFSM : EntityFSM
	{
        public static readonly EntityFSM Instance = new EntityIdleFSM();
		
		public FsmState State
		{
			get
            		{
               		 	return FsmState.FSM_STATE_IDLE;
			}
		}
		
		public bool CanNotStateChange{
			set;get;
		}
		
		public bool StateChange(Ientity entity , EntityFSM fsm)
        	{
			return CanNotStateChange;
		}
		
		public void Enter(Ientity entity , float last)
        	{
            		entity.OnEnterIdle();
		}
		
		public void Execute(Ientity entity)
        	{
            		if (EntityStrategyHelper.IsTick(entity, 3.0f))
           	 	{
                		entity.OnFSMStateChange(EntityFreeFSM.Instance);
            		}
		}
		
		public void Exit(Ientity entity){
			
		}
	}

 /// <summary>
        /// 状态改变
        /// </summary>
        /// <param name="fsm"></param>
        /// <param name="last"></param>
        public void OnFSMStateChange(EntityFSM fsm, float last)
        {
            if (this.FSM != null && this.FSM.StateChange(this, fsm))
            {
                return;
            }

            if (this.FSM == fsm && this.FSM != null && this.FSM.State == FsmState.FSM_STATE_DEAD)
            {
                return;
            }
            if (this.FSM != null)
            {
                this.FSM.Exit(this);
            }

            if (this.FSM != null)
                this.RealEntity.FSMStateName = fsm.ToString();

            this.FSM = fsm;
            StrategyTick = Time.time;
            this.FSM.Enter(this, last);
        }

        public void OnFSMStateChange(EntityFSM fsm)
        {
            if (this.FSM != null && this.FSM.StateChange(this, fsm))
            {
                return;
            }

            if (this.FSM == fsm && this.FSM != null && (this.FSM.State == FsmState.FSM_STATE_DEAD))
            {
                return;
            }

            if (this.FSM != null)
            {
                this.FSM.Exit(this);
            }

            this.FSM = fsm;
            if (this.FSM != null)
                this.RealEntity.FSMStateName = fsm.ToString();
            StrategyTick = Time.time;
            this.FSM.Enter(this, 0.0f);
        }

	public virtual void OnEnterIdle()
        {
            this.RealEntity.PlayerAnimation("idle");
        }

        /// <summary>
        /// Run状态进入时调用
        /// </summary>
        public virtual void OnEnterMove()
        {
        }

	public void PlayerIdleAnimation()
    	{
        	if (this.animation == null)
        	{
           	 	return;
       		 }

        PlayerAnimation("idle");
        this.animation.PlayQueued("free");
    }

	public void PlayerFreeAnimation()
    {
        if (this.animation == null)
        {
            return;
        }

        PlayerAnimation("free");
	}

	public void PlayerRunAnimation(){
		if (this.animation == null) {
			return;
		}
        PlayerAnimation("walk");
	}

	public class EntityReleaseSkillFSM : EntityFSM
	{
		public static readonly EntityFSM Instance = new EntityReleaseSkillFSM();
		public FsmState State{
			get
			{
				return FsmState.FSM_STATE_RELEASE;
			}
		}
		public bool CanNotStateChange{
			set;get;
		}
		
		public bool StateChange(Ientity entity , EntityFSM fsm){
			return CanNotStateChange;
		}
		
		public void Enter(Ientity entity , float last){
			//Debug.LogError("prepareplayskill enter!");
			entity.OnEntityReleaseSkill();
		}
		
		public void Execute(Ientity entity){
            //entity.OnEntityPrepareAttack ();
		}

		public void Exit(Ientity entity){
		    
		}
	}

Unity3D优化技巧系列八

标签：社区   return   term   手把手教你   net   如何   string   实现   lin   

原文地址：http://blog.csdn.net/jxw167/article/details/69056127