UMiniGame/Assets/Games/Scripts/Enemy.cs

using DG.Tweening;
using System;
using System.Collections;
using System.Collections.Generic;
using TMPro;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.AI;
using Random = UnityEngine.Random;

public class Enemy : MonoBehaviour
{
    [Tooltip("最小生命值百分比")]
    [Range(0, 100)]
    public int minHealthPercent = 30;
    [Tooltip("最大生命值百分比")]
    [Range(0, 100)]
    public int maxHealthPercent = 100;
    [Tooltip("初始化生命值")]
    public int health = 100;
    [Tooltip("爆炸音效")]
    public AudioClip boomClip;
    [Tooltip("爆炸音效的音量")]
    public float boomVolumeScale = 1f;
    [Tooltip("X角度偏移")]
    public float addEulerX = 0f;
    [Tooltip("是否开始的时候修改主材质颜色")]
    public bool isChangeInitColor = false;

    public List<Color> randomColors = new List<Color>()
    {       
        new Color(33f / 255f, 144f  /255f, 223f / 255f),
        new Color(13f / 255f, 174f  /255f, 58f / 255f),
        new Color(212f / 255f, 128f  /255f, 24f / 255f),
        new Color(198f / 255f, 11f  /255f, 12f / 255f),
        new Color(187f / 255f, 12f  /255f, 164f / 255f),
        new Color(255f / 255f, 51f  /255f, 255f / 255f),
        new Color(102f / 255f, 178f  /255f, 255f / 255f),
    };

    public int ToPosIndex { get; set; } = 0;

    public Action<int> OnReachDestination = null;

    private NavMeshAgent _agent;
    // 到达目标的距离阈值（根据场景物体大小调整，比如角色半径0.5则设为0.6）
    public float arrivalThreshold = 0.5f;

    // 是否已到达目标的标记
    private bool _hasReachedDestination = false;

    private TextMeshPro _textMeshPro;
    private Renderer _renderer;
    private void Awake()
    {
        _renderer = GetComponentInChildren<Renderer>();
        if (isChangeInitColor)
        {
            var color = randomColors[Random.Range(0, randomColors.Count)];
            _renderer.material.color = color;
        }
        _agent = GetComponent<NavMeshAgent>();
        health = Mathf.RoundToInt(health * Random.Range(minHealthPercent, maxHealthPercent + 1) * 0.01f);
        _textMeshPro = GetComponentInChildren<TextMeshPro>();
        //_textMeshPro.color = new Color(1f - color.r, 1f - color.g, 1f - color.b);
        if (_textMeshPro != null)
        {
            _textMeshPro.text = health.ToString();
        }
        arrivalThreshold = _agent.radius * 1.1f; // 根据Agent半径动态设置阈值
    }

    // Start is called before the first frame update
    void Start()
    {

    }

    public void ResetMaterial()
    {
        var color = _renderer.material.color;
        color.a = 1;
        _renderer.material.color = color;
    }

    public void SetAlphaMaterial()
    {
        var color = _renderer.material.color;
        color.a = 0;
        _renderer.material.color = color;
    }

    // Update is called once per frame
    void Update()
    {
        // 实时检查是否到达目标
        CheckIfReachedDestination();

        // 示例：到达目标后的逻辑
        if (_hasReachedDestination)
        {
            if (OnReachDestination != null)
            {
                ToPosIndex++;
                OnReachDestination(ToPosIndex);
            }
        }
    }

    /// <summary>
    /// 检查是否到达目标位置
    /// </summary>
    private void CheckIfReachedDestination()
    {
        //// 1. 无目标或无路径时，直接标记为未到达
        //if (!_agent.hasPath || _agent.pathStatus != NavMeshPathStatus.PathComplete)
        //{
        //    _hasReachedDestination = false;
        //    return;
        //}

        // 2. 有路径时，检查剩余距离
        // remainingDistance：Agent当前位置到路径终点的剩余距离
        if (_agent.remainingDistance <= arrivalThreshold)
        {
            // 3. 额外检查是否停止移动（避免因障碍物卡住但剩余距离达标）
            //if (!_agent.hasPath || _agent.velocity.sqrMagnitude < 0.01f)
            //{
            _hasReachedDestination = true;
            //}
        }
        else
        {
            _hasReachedDestination = false;
        }
    }

    /// <summary>
    /// 伤害
    /// </summary>
    /// <param name="damage">伤害值</param>
    /// <returns>返回true，表示被击毁，false表示还未被击毁</returns>
    public bool TakeDamage(int damage)
    {
        if (!this.IsDestroyed())
        {
            health -= damage;
            health = Mathf.Max(health, 0); 
            if (_textMeshPro != null)
            {
                _textMeshPro.text = health.ToString();
            }
            if (health == 0)
            {
                Respawn();
                return true;
            }
        }
        return false;
    }

    public void Respawn()
    {
        if (boomClip != null)
        {
            AudioTool.AudioSource.PlayOneShot(boomClip, boomVolumeScale);
        }
        gameObject.transform.DOKill(true);
        Global.LockedEnemies.Remove(GetHashCode());
        Global.DespawnEnemy(this);
    }
}