PacMan/Assets/Scripts/RedGhost.cs

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class RedGhost : MonoBehaviour
{
    // ========== ״̬ö<CCAC><C3B6> ==========
    public enum GhostState
    {
        Idle,        //<2F><><EFBFBD>ֵĴ<D6B5><C4B4><EFBFBD>
        Start,      //<2F>뿪<EFBFBD><EBBFAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        Chase,      // ׷<><D7B7>ģʽ
        Frightened, // <20>־<EFBFBD>ģʽ,<2C><><EFBFBD><EFBFBD>
        Die       // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    }
    public GhostState curstate;//<2F><>ǰö<C7B0><C3B6>

    [Header("<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>")]
    public Rigidbody2D rb;
    public Animator anim;
    public GameObject pacMan;//<2F>Զ<EFBFBD><D4B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    public LayerMask obstadeLayer;//ǽ<>IJ㼶

    [Header("׷<><D7B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߼<EFBFBD><DFBC><EFBFBD><EFBFBD><EFBFBD>")]
    private Vector2 currentDirection;

    public float speed;//<2F><><EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD>
    public float frightenedSpeed;//<2F><><EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD>

    private void Awake()
    {
        rb = GetComponent<Rigidbody2D>();
        // anim = GetComponent<Animator>();
        pacMan = GameObject.Find("PacManPlayer");//<2F>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD><EFBFBD>
    }

    private void Update()
    {
        switch (curstate)
        {
            case GhostState.Idle:
                Idle();
                break;
            case GhostState.Start:
                GhostStart();
                break;
            case GhostState.Chase:
                Chase();
                break;
            case GhostState.Frightened:
                Frightened();
                break;
            case GhostState.Die:
                Die();
                break;
        }
    }

   
    private void Idle()
    {
        curstate = GhostState.Chase;
    }

    private void GhostStart()
    {
        throw new NotImplementedException();
    }


    private void Chase()
    {
        UpdateMovement(pacMan.transform.position, true);
        //anim.SetBool("Frightened", false);
    }

    private void Frightened()
    {
        throw new NotImplementedException();
    }

    private void Die()
    {
        throw new NotImplementedException();
    }



    // <20><><EFBFBD><EFBFBD><EFBFBD>ƶ<EFBFBD><C6B6>߼<EFBFBD><DFBC><EFBFBD>׷<EFBFBD><D7B7>/<2F><><EFBFBD>ܹ<EFBFBD><DCB9>ã<EFBFBD>
    private void UpdateMovement(Vector2 targetPos, bool isChasing)
    {
        Vector2[] directions = { Vector2.up, Vector2.down, Vector2.left, Vector2.right };
        Vector2 bestDir = Vector2.zero;
        float bestValue = isChasing ? Mathf.Infinity : -Mathf.Infinity;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󣬸<EFBFBD><F3A3ACB8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

        foreach (Vector2 dir in directions)
        {
            if (dir == -currentDirection) continue; // ѭ<><D1AD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><C4B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD>ǰ<EFBFBD>ĸ<EFBFBD><C4B8><EFBFBD><EFBFBD>򣬼<EFBFBD><F2A3ACBC><EFBFBD>ִ<EFBFBD>У<EFBFBD><D0A3><EFBFBD>ֱֹ<D6B9>ӻ<EFBFBD>ͷ

            RaycastHit2D hit = Physics2D.Raycast(transform.position, dir, 1f, obstadeLayer);//<2F><>ʼ<EFBFBD>㣬<EFBFBD><E3A3AC><EFBFBD>򣬳<EFBFBD><F2A3ACB3>ȣ<EFBFBD><C8A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
            if (hit.collider != null) continue;

            // <20><><EFBFBD>㷽<EFBFBD><E3B7BD><EFBFBD><EFBFBD>ֵ
            float distance = Vector2.Distance(rb.position + dir, targetPos);//<2F><>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD>ӷ<EFBFBD><D3B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD>ֵ
            float currentValue = isChasing ? distance : -distance;//<2F><>׷<EFBFBD><D7B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

            if ((isChasing && currentValue < bestValue) || (!isChasing && currentValue > bestValue))
            {
                bestValue = currentValue;
                bestDir = dir;
            }
        }

        if (bestDir != Vector2.zero)
        {
            currentDirection = bestDir;
            rb.velocity = currentDirection * (curstate == GhostState.Frightened ? frightenedSpeed : speed);
            //anim.SetFloat("DirX", currentDirection.x);
            //anim.SetFloat("DirY", currentDirection.y);
        }
    }
}