361 lines
14 KiB
C#
361 lines
14 KiB
C#
using System;
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using System.Collections;
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using Animancer;
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using UnityEngine;
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namespace BaseGames.Enemies
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{
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/// <summary>
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/// 敌人移动组件（架构 07_EnemyModule §3）。
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/// 实现：水平移动、面向目标、击退，以及导航连接段穿越（<see cref="INavLinkHandler"/>）。
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///
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/// 作为 <see cref="INavLinkHandler"/> 处理 Jump / Fall 两种 NavLink 类型：
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/// - 跳跃连接（Jump）：调用 <see cref="JumpToTarget"/> 施加物理冲量，等待落地后通知完成
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/// - 下落连接（Fall） ：水平对准目标X，让重力自然下坠，到达目标Y附近通知完成
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/// 没有 EnemyMovement 组件（或 Jump 能力被移除）的敌人将无法通过跳跃连接，
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/// 路径代价保持 TransformBasedMovement 兜底（仍可跳，但无自定义动画/物理）。
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///
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/// ⚠️ 使用 Rigidbody2D.velocity（Unity 2022 LTS）。
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/// </summary>
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[RequireComponent(typeof(Rigidbody2D))]
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public class EnemyMovement : MonoBehaviour, INavLinkHandler
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{
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[SerializeField] private EnemyStatsSO _config;
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[SerializeField] private SpriteRenderer _spriteRenderer;
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[Header("转身动画")]
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[Tooltip("开启后，敌人翻转方向时播放转身动画并暂停水平移动，动画结束后完成翻转")]
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[SerializeField] private bool _enableTurnAnimation = false;
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[Tooltip("Animancer 组件引用；留空则在 Awake 时自动从父级查找")]
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[SerializeField] private AnimancerComponent _animancer;
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[Tooltip("动画配置 SO；留空则在 Awake 时自动从 EnemyBase 读取")]
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[SerializeField] private EnemyAnimationConfigSO _animConfig;
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[Header("导航跳跃能力（INavLinkHandler）")]
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[Tooltip("可处理的最大跳跃垂直高度（超出则让 TBM 兜底）")]
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[SerializeField] private float _navJumpMaxHeight = 6f;
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[Tooltip("可处理的最大跳跃水平距离")]
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[SerializeField] private float _navJumpMaxDist = 10f;
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[Tooltip("地面检测射线长度（用于判断跳跃是否落地）")]
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[SerializeField] private float _groundCheckDist = 0.35f;
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[Tooltip("地面层 LayerMask")]
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[SerializeField] private LayerMask _groundMask;
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private Rigidbody2D _rb;
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private int _facingDir = 1;
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private Coroutine _linkCoroutine;
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// ── 转身状态 ────────────────────────────────────────────────────────
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private bool _isTurning;
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private int _pendingFacingDir; // 转身目标方向，转身完成后 ApplyFacingFlip 使用
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private Coroutine _turnCoroutine;
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public bool IsGrounded { get; private set; }
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/// <summary>当前朝向：1 = 右，-1 = 左。</summary>
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public int FacingDirection => _facingDir;
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/// <summary>当前是否正在播放转身动画（移动输入在此期间被屏蔽）。</summary>
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public bool IsTurning => _isTurning;
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// ── INavLinkHandler ────────────────────────────────────────────
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private static readonly NavLinkType[] _handledTypes =
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new[] { NavLinkType.Jump, NavLinkType.Fall };
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public NavLinkType[] HandledLinkTypes => _handledTypes;
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public bool CanHandleLink(NavLinkType type, Vector2 linkStart, Vector2 linkEnd)
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{
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if (type == NavLinkType.Jump)
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{
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float dy = Mathf.Abs(linkEnd.y - linkStart.y);
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float dx = Mathf.Abs(linkEnd.x - linkStart.x);
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return dy <= _navJumpMaxHeight && dx <= _navJumpMaxDist;
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}
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return true; // Fall 总是可以处理
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}
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public void BeginLinkTraversal(NavLinkType type, Vector2 linkStart, Vector2 linkEnd, Action onComplete)
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{
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CancelTurn(); // 进入连接段前中止任何进行中的转身
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if (_linkCoroutine != null) StopCoroutine(_linkCoroutine);
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_linkCoroutine = type == NavLinkType.Jump
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? StartCoroutine(JumpLinkCoroutine(linkStart, linkEnd, onComplete))
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: StartCoroutine(FallLinkCoroutine(linkStart, linkEnd, onComplete));
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}
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public void AbortLinkTraversal()
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{
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if (_linkCoroutine != null) { StopCoroutine(_linkCoroutine); _linkCoroutine = null; }
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CancelTurn();
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StopHorizontal();
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}
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private IEnumerator JumpLinkCoroutine(Vector2 start, Vector2 end, Action onComplete)
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{
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JumpToTarget(end);
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yield return null; // 等一帧让 velocity 生效
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// 等待离地后落地（超时 3s 防死锁）
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float timer = 0f;
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bool leftGround = false;
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while (timer < 3f)
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{
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timer += Time.fixedDeltaTime;
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yield return new WaitForFixedUpdate();
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if (!leftGround && !IsGroundedCheck()) { leftGround = true; }
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if (leftGround && IsGroundedCheck()) break;
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}
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StopHorizontal();
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_linkCoroutine = null;
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onComplete?.Invoke();
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}
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private IEnumerator FallLinkCoroutine(Vector2 start, Vector2 end, Action onComplete)
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{
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// 水平对准目标
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float dx = end.x - (float)transform.position.x;
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if (Mathf.Abs(dx) > 0.15f) MoveHorizontal(Mathf.Sign(dx));
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// 等待接近目标Y（重力驱动下落）
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float timer = 0f;
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while (timer < 3f)
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{
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timer += Time.fixedDeltaTime;
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yield return new WaitForFixedUpdate();
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if (IsGroundedCheck() && Mathf.Abs(_rb.position.y - end.y) < 0.6f) break;
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}
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StopHorizontal();
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_linkCoroutine = null;
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onComplete?.Invoke();
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}
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private bool IsGroundedCheck() =>
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Physics2D.Raycast(_rb.position, Vector2.down, _groundCheckDist, _groundMask);
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private void Awake()
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{
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Debug.Assert(_config != null, "[EnemyMovement] _config 未赋值，请在 Prefab Inspector 中指定 EnemyStatsSO。", this);
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_rb = GetComponent<Rigidbody2D>();
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if (_enableTurnAnimation)
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{
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if (_animancer == null) _animancer = GetComponentInParent<AnimancerComponent>(true);
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if (_animConfig == null)
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{
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var enemyBase = GetComponentInParent<EnemyBase>(true);
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if (enemyBase != null) _animConfig = enemyBase.AnimConfig;
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}
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}
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}
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private void FixedUpdate()
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{
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IsGrounded = IsGroundedCheck();
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}
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/// <summary>按 SO 配置速度水平移动。dir: +1 右 / -1 左 / 0 停止。转身动画期间调用无效。</summary>
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public void MoveHorizontal(float dir)
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{
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if (_isTurning) return;
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var vel = _rb.velocity;
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vel.x = dir * _config.WalkSpeed;
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_rb.velocity = vel;
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UpdateFacing(dir);
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}
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/// <summary>显式指定速度（BD 追击任务调用）。转身动画期间调用无效。</summary>
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public void MoveWithSpeed(float dir, float speed)
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{
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if (_isTurning) return;
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var vel = _rb.velocity;
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vel.x = dir * speed;
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_rb.velocity = vel;
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UpdateFacing(dir);
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}
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/// <summary>朝向指定世界坐标（通常传入玩家位置）。</summary>
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public void FaceTarget(Vector2 targetPos)
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{
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float dir = targetPos.x < transform.position.x ? -1f : 1f;
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UpdateFacing(dir);
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}
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/// <summary>
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/// 直接指定朝向方向。dir: +1 = 右，-1 = 左。
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/// 若启用转身动画且方向确实改变，会触发转身流程。
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/// </summary>
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public void FaceDirection(int dir)
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{
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if (dir == 0) return;
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UpdateFacing(dir > 0 ? 1f : -1f);
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}
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/// <summary>朝向右方（+X）。</summary>
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public void FaceRight() => FaceDirection(1);
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/// <summary>朝向左方（-X）。</summary>
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public void FaceLeft() => FaceDirection(-1);
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public void ApplyKnockback(Vector2 dir, float force)
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{
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_rb.velocity = dir.normalized * force;
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}
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/// <summary>
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/// 击飞冲量：向上 + 沿受击反方向水平。
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/// sourceDir 为伤害来源朝向（通常是 DamageInfo.KnockbackDirection），横向取其反方向。
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/// </summary>
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/// <param name="sourceDir">来袭方向（已归一化）</param>
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/// <param name="horzForce">水平冲量大小</param>
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/// <param name="upForce">纵向冲量大小</param>
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public void LaunchKnockup(Vector2 sourceDir, float horzForce, float upForce)
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{
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if (_rb == null) return;
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float horzSign = sourceDir.x >= 0f ? -1f : 1f; // 反方向弹飞
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_rb.velocity = new Vector2(horzSign * horzForce, upForce);
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}
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public void StopHorizontal()
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{
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var vel = _rb.velocity;
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vel.x = 0f;
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_rb.velocity = vel;
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}
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/// <summary>
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/// 向目标位置抖跃（抛物线累加填充）。
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/// 计算初速使尔子到达目标，用 Impulse 施加力。
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/// </summary>
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public void JumpToTarget(Vector2 target)
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{
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if (_rb == null) return;
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Vector2 delta = target - (Vector2)transform.position;
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float gravMag = Mathf.Abs(Physics2D.gravity.y * _rb.gravityScale);
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float timeAloft = Mathf.Max(0.1f, delta.x != 0f
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? Mathf.Abs(delta.x) / _config.RunSpeed
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: 0.5f);
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float vy = (delta.y - 0.5f * (-gravMag) * timeAloft * timeAloft) / timeAloft;
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float vx = delta.x / timeAloft;
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_rb.velocity = new Vector2(vx, vy);
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UpdateFacing(vx);
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}
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private void UpdateFacing(float dir)
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{
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if (Mathf.Approximately(dir, 0f)) return;
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if (_isTurning) return; // 转身进行中，忽略新的朝向请求
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int newDir = dir > 0f ? 1 : -1;
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if (newDir == _facingDir) return;
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if (_enableTurnAnimation && _animancer != null && _animConfig?.Turn != null)
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{
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// 启动转身协程：动画播完后再实际翻转
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_pendingFacingDir = newDir;
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if (_turnCoroutine != null) StopCoroutine(_turnCoroutine);
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_turnCoroutine = StartCoroutine(TurnCoroutine(newDir));
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}
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else
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{
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ApplyFacingFlip(newDir);
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}
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}
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/// <summary>转身动画协程：停止水平移动 → 播放 Turn 动画 → 翻转朝向 → 恢复。</summary>
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private IEnumerator TurnCoroutine(int newDir)
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{
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_isTurning = true;
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StopHorizontal();
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_animancer.Play(_animConfig.Turn);
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float elapsed = 0f;
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float duration = _animConfig.Turn.length;
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while (elapsed < duration)
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{
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elapsed += Time.deltaTime;
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yield return null;
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}
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ApplyFacingFlip(newDir);
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_isTurning = false;
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_turnCoroutine = null;
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}
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/// <summary>
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/// 立即中止进行中的转身协程，并将朝向应用到待转方向。
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/// 受击、死亡、NavLink 穿越等外部中断时调用。
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/// </summary>
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public void CancelTurn()
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{
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if (_turnCoroutine == null) return;
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StopCoroutine(_turnCoroutine);
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_turnCoroutine = null;
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if (_isTurning)
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{
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ApplyFacingFlip(_pendingFacingDir);
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_isTurning = false;
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}
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}
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/// <summary>真正执行朝向翻转（修改 SpriteRenderer.flipX 或 localScale）。</summary>
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private void ApplyFacingFlip(int newDir)
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{
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_facingDir = newDir;
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if (_spriteRenderer != null)
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_spriteRenderer.flipX = newDir < 0;
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else
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{
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Vector3 s = transform.localScale;
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transform.localScale = new Vector3(Mathf.Abs(s.x) * newDir, s.y, s.z);
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}
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}
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private void OnDrawGizmos()
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{
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#if UNITY_EDITOR
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// ── 1. 敌人物理轮廓（珊瑚红，区别于玩家绿色）────────────────
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Gizmos.color = new Color(1f, 0.45f, 0.35f, 0.65f);
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foreach (var col in GetComponents<Collider2D>())
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{
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if (col.isTrigger) continue;
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BaseGames.Combat.HitBox.DrawCollider2DWire(col);
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}
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// ── 2. 朝向箭头（橙色）──────────────────────────────────────
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Vector3 center = transform.position;
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DrawArrow2D(center, center + new Vector3(_facingDir * 0.5f, 0f, 0f),
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new Color(1f, 0.6f, 0.1f, 0.9f));
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#endif
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}
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private void OnDrawGizmosSelected()
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{
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#if UNITY_EDITOR
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// 运行时：青色箭头显示速度向量（选中时）
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if (!Application.isPlaying || _rb == null) return;
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Vector2 vel = _rb.velocity;
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if (vel.sqrMagnitude < 0.01f) return;
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DrawArrow2D(transform.position, transform.position + (Vector3)(vel * 0.12f),
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new Color(0.2f, 0.9f, 1f, 0.9f), 0.1f);
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#endif
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}
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// 在 Gizmos 空间绘制带箭头的 2D 有向线段
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private static void DrawArrow2D(Vector3 from, Vector3 to, Color color, float headLen = 0.15f)
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{
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Vector3 dir = to - from;
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if (dir.sqrMagnitude < 0.0001f) return;
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dir = dir.normalized;
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Gizmos.color = color;
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Gizmos.DrawLine(from, to);
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float cos = 0.8192f, sin = 0.5736f; // cos/sin 35°
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float bx = -dir.x, by = -dir.y;
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Vector3 wing1 = new Vector3(bx * cos - by * sin, bx * sin + by * cos, 0f) * headLen;
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Vector3 wing2 = new Vector3(bx * cos + by * sin, -bx * sin + by * cos, 0f) * headLen;
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Gizmos.DrawLine(to, to + wing1);
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Gizmos.DrawLine(to, to + wing2);
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}
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}
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}
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