308 lines
14 KiB
C#
308 lines
14 KiB
C#
using UnityEngine;
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using BaseGames.AI;
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namespace BaseGames.Enemies
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{
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/// <summary>
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/// 敌人移动执行器：唯一的移动/朝向入口。AI 状态与能力经 IEnemyLocomotion
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/// 声明意图，本组件每帧把当前模式翻译为对 EnemyBase/IPathAgent 的调用。
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/// 取代散落的 MoveTo/StopMovement/FacePlayer/FaceTarget 直调与三个协程能力。
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/// </summary>
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[DisallowMultipleComponent]
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public sealed class EnemyLocomotion : MonoBehaviour, IEnemyLocomotion
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{
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[Header("巡逻策略（Wander/Pace/Waypoints）")]
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[SerializeField] private PatrolStrategy _patrolStrategy = PatrolStrategy.Wander;
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[Header("Wander 策略参数")]
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[Tooltip("到达一个随机游走点后的停顿时长下限（秒）。停顿期间原地待机（播 Idle），再挑下一个点。")]
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[SerializeField] [Min(0f)] private float _wanderPauseMin = 0.5f;
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[Tooltip("到达一个随机游走点后的停顿时长上限（秒）。与下限相同=固定时长；两者都为 0=不停顿、立即挑下一个点。")]
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[SerializeField] [Min(0f)] private float _wanderPauseMax = 1.5f;
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[Header("Waypoints 策略参数")]
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[SerializeField] private Transform[] _waypoints;
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[SerializeField] private bool _pingPong;
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[SerializeField] private float _waypointArriveRadius = 0.4f;
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private EnemyBase _enemy;
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private LocomotionMode _mode = LocomotionMode.Idle;
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private Transform _approachTarget;
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private Vector2 _facePoint;
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private LocomotionMode _gaitMode;
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private bool _gaitInit;
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private float _paceDir = 1f;
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private bool _paceBlockedPrev;
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private float _paceWindowStartX;
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private int _paceWindowFrames;
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private int _wpIndex = -1;
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private int _wpDir = 1;
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private bool _warnedNoWaypoints;
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// 当前路点吸附后的"站得住"目标（宽度由 Nav 层解析，本层不感知身体尺寸）
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private Vector2 _wpResolvedGoal;
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private bool _wpResolveOk; // 上次路点是否成功吸附到导航段（调试用）
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// Wander 到点停顿状态
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private bool _wanderPausing;
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private float _wanderPauseTimer;
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// Waypoints 受阻结算停顿状态
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private bool _wpPausing;
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private float _wpPauseTimer;
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public LocomotionMode CurrentMode => _mode;
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public bool IsMoving => _enemy != null && _enemy.Nav != null && _enemy.Nav.IsMoving;
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private void Awake()
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{
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_enemy = GetComponentInParent<EnemyBase>();
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if (_enemy == null)
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Debug.LogError("[EnemyLocomotion] 找不到 EnemyBase。", this);
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}
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// ── IEnemyLocomotion（声明意图，不立即 actuate 之外的副作用）──
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public void SetMode(LocomotionMode mode)
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{
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if (_mode == mode) return;
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_mode = mode;
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_wanderPausing = false; // 切换模式清 Wander 停顿态
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_wpPausing = false; // 同时清 Waypoints 受阻停顿态
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if (mode == LocomotionMode.Idle) _enemy?.StopMovement();
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if (mode == LocomotionMode.Patrol && _enemy?.Stats != null)
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_enemy.Nav?.SetSpeed(_enemy.Stats.WalkSpeed);
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}
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public void Approach(Transform target)
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{
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_mode = LocomotionMode.Approach;
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_approachTarget = target;
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if (_enemy?.Stats != null) _enemy.Nav?.SetSpeed(_enemy.Stats.RunSpeed);
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}
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public void MoveTo(Vector2 point)
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{
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_mode = LocomotionMode.Approach;
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_approachTarget = null;
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_enemy?.MoveTo(point);
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}
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public void Face(Vector2 lookAt)
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{
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_mode = LocomotionMode.Face;
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_facePoint = lookAt;
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}
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public void Stop()
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{
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_mode = LocomotionMode.Idle;
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_enemy?.StopMovement();
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}
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// ── 每帧把模式翻译成执行 ──
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private void Update()
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{
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if (_enemy == null) return;
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// Wander 到点停顿期间用 Idle 步态（原地待机，否则站着播 Walk=原地踏步）。
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LocomotionMode gait = (_mode == LocomotionMode.Patrol
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&& _patrolStrategy == PatrolStrategy.Wander
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&& _wanderPausing)
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? LocomotionMode.Idle : _mode;
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if (!_gaitInit || _gaitMode != gait)
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{
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_enemy.PlayLocomotionClip(gait);
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// 招式动画锁定期内不算"已应用"，解锁后重新同步步态（否则 Skill_End 后卡在收招动画）
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if (!_enemy.IsAnimLocked) { _gaitMode = gait; _gaitInit = true; }
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}
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switch (_mode)
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{
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case LocomotionMode.Idle:
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break; // SetMode(Idle) 已停；保持
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case LocomotionMode.Patrol:
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TickPatrol();
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break;
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case LocomotionMode.Face:
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_enemy.StopMovement();
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_enemy.FaceTarget(_facePoint);
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break;
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case LocomotionMode.Approach:
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if (_approachTarget != null) _enemy.MoveTo(_approachTarget.position);
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break;
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}
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}
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/// <summary>
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/// 段内随机游走：随机点限制在当前所站的导航段上（不跨 NavLink，避免崖边夹停/卡 link），
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/// 到达一个点后原地停顿 [_wanderPauseMin, _wanderPauseMax] 秒（期间播 Idle），再挑下一个点。
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/// </summary>
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private void TickWander()
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{
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if (_enemy.Nav == null) return;
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// 移动中：清停顿态，等到达
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if (_enemy.Nav.IsMoving) { _wanderPausing = false; return; }
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// 已到达（或尚未出发）：先停顿计时，再挑下一个点
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if (!_wanderPausing)
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{
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_wanderPausing = true;
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_wanderPauseTimer = Random.Range(_wanderPauseMin, Mathf.Max(_wanderPauseMin, _wanderPauseMax));
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}
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_wanderPauseTimer -= Time.deltaTime;
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if (_wanderPauseTimer <= 0f)
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{
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_wanderPausing = false;
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_enemy.Nav.WalkToRandomOnSegment();
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}
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}
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private void TickPatrol()
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{
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switch (_patrolStrategy)
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{
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case PatrolStrategy.Wander:
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TickWander();
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break;
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case PatrolStrategy.Pace: // 撞墙/悬崖翻向的来回踱步（速度驱动，不依赖 nav）
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var mv = _enemy.Movement;
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// 用与移动层夹紧同一判定(WouldBlockAhead，即时按请求方向+碰撞体前缘)，
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// 保证"夹停在地形边缘"与"掉头"一致，不会夹停却不翻向。
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bool blocked = mv != null && mv.WouldBlockAhead(_paceDir);
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// 兜底卡死检测(窗口净位移)：命令前进但一段时间净位移过小(撞上未挂检测层的墙/
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// 卡角，含贴墙微抖)也视为受阻，使巡逻对场景配置鲁棒。用净位移而非逐帧差，
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// 避免"贴墙推进-被弹回"的微抖每帧重置计数。
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float px = _enemy.transform.position.x;
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if (++_paceWindowFrames >= 12)
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{
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if (Mathf.Abs(px - _paceWindowStartX) < 0.05f) blocked = true;
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_paceWindowStartX = px;
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_paceWindowFrames = 0;
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}
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// 边沿触发：仅"障碍首次出现"翻一次；翻后按新方向即时判定，天然消抖，
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// 且两侧都堵(窄台)时翻一次即停住、不来回抖。
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if (blocked && !_paceBlockedPrev)
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{
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_paceDir = -_paceDir;
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_paceWindowStartX = px; _paceWindowFrames = 0; // 翻向后重开窗口
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}
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_paceBlockedPrev = blocked;
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_enemy.MoveInDirection(_paceDir);
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break;
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case PatrolStrategy.Waypoints:
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if (_waypoints == null || _waypoints.Length == 0)
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{
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if (!_warnedNoWaypoints)
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{
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Debug.LogWarning("[EnemyLocomotion] PatrolStrategy=Waypoints 但未配置 _waypoints，无法巡逻。", this);
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_warnedNoWaypoints = true;
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}
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break;
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}
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var nav = _enemy.Nav;
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// 到达判定对"吸附后的可达点"做（原始路点可能摆在空中/崖外，永远进不了到达半径）。
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bool wpArrived = _wpIndex >= 0 &&
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Vector2.Distance(_enemy.transform.position, _wpResolvedGoal) <= _waypointArriveRadius;
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// 受阻结算：执行层已把敌人带到最近可达点并停下(或原地停) → 视为本路点完成。
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bool obstructedSettled = nav != null && nav.LastMoveObstructed && !nav.IsMoving;
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if (_wpIndex < 0 || wpArrived || obstructedSettled)
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{
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// 受阻结算走短暂停顿(复用 Wander 停顿参数)；正常到达/首个点立即推进。
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if (obstructedSettled && !_wpPausing)
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{
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_wpPausing = true;
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_wpPauseTimer = Random.Range(_wanderPauseMin, Mathf.Max(_wanderPauseMin, _wanderPauseMax));
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}
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if (_wpPausing)
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{
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_wpPauseTimer -= Time.deltaTime;
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if (_wpPauseTimer > 0f) break; // 停顿中，原地待机
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_wpPausing = false;
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}
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AdvanceWaypoint();
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SetWaypointGoal();
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}
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else if (nav != null && !nav.IsMoving && !nav.LastMoveObstructed)
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{
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// 瞬态：刚出生尚未映射那一帧的 MoveTo 失败 → 重发(RequestMoveTo 自带 0.25s 防抖)。
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// 仅"未受阻"时重发；受阻由上面 obstructedSettled 分支结算，不再无限重发不可达点。
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_enemy.MoveTo(_wpResolvedGoal);
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}
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break;
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}
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}
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/// <summary>
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/// 解析当前路点为"身体站得住的可达点"并出发。宽度处理下沉给 Nav 层（<see cref="IPathAgent.ResolveStandablePoint"/>），
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/// 本层只递原始路点坐标、不感知身体尺寸。吸附失败＝路点摆得离导航面太远，显式报错暴露根因，不静默兜底。
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/// </summary>
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private void SetWaypointGoal()
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{
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Vector2 raw = _waypoints[_wpIndex].position;
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_wpResolveOk = _enemy.Nav != null && _enemy.Nav.ResolveStandablePoint(raw, out _wpResolvedGoal);
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if (!_wpResolveOk)
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{
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_wpResolvedGoal = raw;
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Debug.LogWarning($"[EnemyLocomotion] 路点 '{_waypoints[_wpIndex].name}'(index {_wpIndex}) 无法吸附到任何可行走导航段" +
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"（超出搜索半径）。请检查该路点是否摆放在贴近地面/平台的可行走处。", this);
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}
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_enemy.MoveTo(_wpResolvedGoal);
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}
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private void AdvanceWaypoint()
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{
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if (_pingPong)
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{
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int next = _wpIndex + _wpDir;
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if (next < 0 || next >= _waypoints.Length) { _wpDir = -_wpDir; next = _wpIndex + _wpDir; }
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_wpIndex = Mathf.Clamp(next, 0, _waypoints.Length - 1);
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}
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else
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{
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_wpIndex = (_wpIndex + 1) % _waypoints.Length;
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}
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}
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#if UNITY_EDITOR
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// ── 调试只读（供自定义 Inspector / Gizmos，仅编辑器）────────────────────────
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public EnemyBase DebugEnemy => _enemy;
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public PatrolStrategy DebugStrategy => _patrolStrategy;
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public Transform[] DebugWaypoints => _waypoints;
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public int DebugWaypointIndex => _wpIndex;
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public Vector2 DebugResolvedGoal => _wpResolvedGoal;
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public bool DebugResolveOk => _wpResolveOk;
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public float DebugArriveRadius => _waypointArriveRadius;
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public bool DebugWanderPausing => _wanderPausing;
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private void OnDrawGizmosSelected()
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{
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if (_patrolStrategy != PatrolStrategy.Waypoints || _waypoints == null) return;
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// 所有路点 + 连线（编辑期即可见，用于摆点）
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Gizmos.color = new Color(0.3f, 0.8f, 1f);
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for (int i = 0; i < _waypoints.Length; i++)
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{
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if (_waypoints[i] == null) continue;
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Gizmos.DrawWireSphere(_waypoints[i].position, 0.15f);
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var next = _waypoints[(i + 1) % _waypoints.Length];
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if (next != null) Gizmos.DrawLine(_waypoints[i].position, next.position);
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}
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// 运行期：当前吸附目标 + 到达半径 + 连线（绿=吸附成功 红=失败回落原始点）
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if (Application.isPlaying && _wpIndex >= 0)
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{
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Vector3 from = _enemy != null ? _enemy.transform.position : transform.position;
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Gizmos.color = _wpResolveOk ? Color.green : Color.red;
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Gizmos.DrawWireSphere(_wpResolvedGoal, 0.22f);
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Gizmos.DrawLine(from, _wpResolvedGoal);
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Gizmos.color = new Color(1f, 0.9f, 0.2f, 0.7f);
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Gizmos.DrawWireSphere(_wpResolvedGoal, _waypointArriveRadius);
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}
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}
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#endif
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}
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}
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