[Unity][방법] Status패턴 방법

1. enum으로 상태값 정의

2. 상태에 따른 함수 정의 

3. 상태만 변경해서 사용

  float wait_run_ratio;
    PlayerState _state = PlayerState.Idle;


    public enum PlayerState
    {
        Die, 
        Moving,
        Idle, 
    }

    void UpdateDie()
    {
    }
    void UpdateMoving()
    {
        Vector3 dir = _destPos - transform.position;
        if (dir.magnitude < 0.0001f)
        {
            _state = PlayerState.Idle;
        }
        else
        {
            float moveDist = Math.Clamp(_speed * Time.deltaTime, 0, dir.magnitude);//clamp는 시작 값 끝값에 대한 거리값 덮어써줌
            transform.position += dir.normalized * moveDist;

            transform.rotation = Quaternion.Slerp(transform.rotation, Quaternion.LookRotation(dir), 20 * Time.deltaTime);
            transform.LookAt(_destPos);
        }

        wait_run_ratio = Mathf.Lerp(wait_run_ratio, 1, 10.0f * Time.deltaTime);
        Animator anim = GetComponent<Animator>();
        anim.SetFloat("wait_run_ratio", wait_run_ratio);
        anim.Play("WAIT_RUN");
    }
    void UpdateIdie()
    {
        wait_run_ratio = Mathf.Lerp(wait_run_ratio, 0, 10.0f * Time.deltaTime);
        Animator anim = GetComponent<Animator>();
        anim.SetFloat("wait_run_ratio", wait_run_ratio);
        anim.Play("WAIT_RUN");
    }
    void Update()
    {
        switch (_state)
        {
            case PlayerState.Die:
                UpdateDie();
                break;
            case PlayerState.Moving:
                UpdateMoving();
                break;
            case PlayerState.Idle:
                UpdateIdie();
                break;
        }
    }