[SimpleRPG] 보스전 구현(2) 탐지 범위 수정

1. Boss의 탐지범위 안으로 Hero가 들어오면 탐지범위 2배로 증가

2. Boss의 탐지범위 밖으로 Hero가 나가면 탐지 범위 0으로 변환

3. Boss가 처음 자리로 돌아가면 탐지범위 초기 상태로 변

using System.Collections;
using UnityEngine;

public class BossController : MonoBehaviour
{
    public float detectionRange = 6f;
    public float attackRange = 2f;
    public float moveSpeed = 1f;

    private float initDetectRange;

    private GameObject Hero;
    private int state = 0;
    private Animator animator;
    private Quaternion initialRotation;
    private Vector3 initialPosition;


    private void Start()
    {
        animator = GetComponent<Animator>();
        StartCoroutine(LateStart());
        initialPosition = transform.position;
        initialRotation = transform.rotation;
        initDetectRange = detectionRange;
    }

    IEnumerator LateStart()
    {
        yield return new WaitForSeconds(0.1f);
        Hero = GameObject.FindGameObjectWithTag("Hero");
    }

    private void Update()
    {
        if (Hero == null)
        {
            Hero = GameObject.FindGameObjectWithTag("Hero");
            if (Hero == null)
            {
                Debug.LogError("Hero not found in the scene.");
                return;
            }
            else
            {
                Debug.Log("Hero found.");
            }
        }

        switch (state)
        {
            case 0:
                Idle();
                break;
            case 1:
                Chase();
                break;
            case 2:
                Attack();
                break;
            case 3:
                ReturnToStartPosition();
                break;
        }

        animator.SetInteger("state", state);
    }

    void Idle()
    {
        float distance = Vector3.Distance(transform.position, Hero.transform.position);
        if (distance <= detectionRange)
            state = 1;
    }

    void Chase()
    {
        detectionRange = 12f;
        float distance = Vector3.Distance(transform.position, Hero.transform.position);
        if (distance > detectionRange)
        {
            
            state = 3;
            return;
        }


        if (distance <= attackRange)
        {

            state = 2;
            
            return;
        }

        Vector3 moveDirection = (Hero.transform.position - transform.position).normalized;
        transform.LookAt(Hero.transform);

        // 플레이어와의 거리와 다음 프레임에서의 이동 거리를 비교
        float nextStepDistance = moveSpeed * Time.deltaTime;
        if (distance > nextStepDistance)  // 만약 이동 거리가 플레이어와의 거리보다 짧으면 이동
        {
            transform.position += moveDirection * nextStepDistance;
        }
        else  // 그렇지 않다면, 플레이어 바로 앞에서 멈춤
        {
            transform.position = transform.position + moveDirection * distance;
        }
    }

    void Attack()
    {
        float distance = Vector3.Distance(transform.position, Hero.transform.position);
        if (distance > attackRange)
            state = 1;
        return;
    }

    public void SetHero(GameObject newHero)
    {
        Hero = newHero;
    }
    void ReturnToStartPosition()
    {
        detectionRange = 0f;
        float distanceToStart = Vector3.Distance(transform.position, initialPosition);
        transform.LookAt(initialPosition);
        if (distanceToStart < 0.1f)
        {
            
            state = 0;
            this.transform.rotation = initialRotation;
            detectionRange = initDetectRange;
            return;
        }

        Vector3 moveDirection = (initialPosition - transform.position).normalized;
        transform.position += moveDirection * moveSpeed * Time.deltaTime;
    }

    private void OnDrawGizmos()
    {
       
        Gizmos.color = Color.yellow;
        GizmosExtensions.DrawWireArc(this.transform.position, this.transform.forward, 360, this.detectionRange, 20);
        Gizmos.color = Color.red;
        GizmosExtensions.DrawWireArc(this.transform.position, this.transform.forward, 360, this.attackRange, 20);
    }


}