71 lines
2.7 KiB
C#
71 lines
2.7 KiB
C#
using System.Collections.Generic;
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using UnityEngine;
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using BaseGames.Core;
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using BaseGames.Core.Events;
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namespace BaseGames.Combat
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{
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/// <summary>
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/// 拼刀系统单例服务（架构 06_CombatModule §15）。
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/// 常驻 Persistent 场景，由 GameManager 持有。
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/// 当玩家与敌人的近战 HitBox 同时激活并相互重叠时触发拼刀：双方均不扣血，各自弹开。
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/// </summary>
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[DefaultExecutionOrder(-500)]
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public class ClashResolver : MonoBehaviour, IClashService
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{
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[SerializeField] private VoidEventChannelSO _onNailClash; // EVT_NailClash
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[SerializeField] private ClashConfigSO _config;
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// 防止同一碰撞在同帧被双方 HitBox 各触发一次（去重）
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// Key = (min(idA,idB), max(idA,idB))，顺序无关且无 XOR 哈希碰撞风险
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private readonly HashSet<(int, int)> _processedThisFrame = new();
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private void Awake()
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{
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if (ServiceLocator.GetOrDefault<IClashService>() != null)
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{
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Destroy(gameObject);
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return;
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}
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ServiceLocator.Register<IClashService>(this);
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Debug.Assert(_config != null, "[ClashResolver] _config 未赋值，请在 Inspector 中指定 ClashConfigSO。", this);
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}
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private void LateUpdate() => _processedThisFrame.Clear();
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/// <summary>
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/// 由 HitBox.OnTriggerEnter2D 调用。
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/// 对同一对 HitBox 每帧只处理一次（HashSet 去重）。
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/// </summary>
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public void ResolveClash(HitBox hitBoxA, HitBox hitBoxB)
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{
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int idA = hitBoxA.GetInstanceID();
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int idB = hitBoxB.GetInstanceID();
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(int, int) key = (System.Math.Min(idA, idB), System.Math.Max(idA, idB));
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if (!_processedThisFrame.Add(key)) return;
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// 1. 拼刀冻帧（比普通命中的 2 帧更短，强化拼刀手感）
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ServiceLocator.GetOrDefault<IHitStopService>()?.FreezeFrames(_config.ClashFreezeFrames);
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// 2. 双方弹开
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ApplyClashKnockback(hitBoxA.OwnerRigidbody, hitBoxB.transform.position);
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ApplyClashKnockback(hitBoxB.OwnerRigidbody, hitBoxA.transform.position);
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// 3. 广播事件（VFX / Audio / CameraImpulse 订阅）
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_onNailClash?.Raise();
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}
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private void ApplyClashKnockback(Rigidbody2D rb, Vector2 oppositePos)
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{
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if (rb == null) return;
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Vector2 dir = ((Vector2)rb.transform.position - oppositePos).normalized;
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rb.AddForce(dir * _config.ClashKnockbackForce, ForceMode2D.Impulse);
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}
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private void OnDestroy()
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{
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ServiceLocator.Unregister<IClashService>(this);
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}
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}
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}
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