仇恨系统与 AI 目标选择

public interface IAggroTarget {
    float GetThreatModifier(AggroType aggroType); // 不同仇恨类型可有不同修正
    EntityType GetEntityType(); // 返回实体类型 (Player, TankTower, Nexus)
    bool IsValid(); // 是否死亡、隐身或不可作为目标
    Vector3 Position { get; }
    // 可以添加获取当前血量、是否施法等信息的方法
}

public enum EntityType { Player, TankTower, StandardTower, Minion, Nexus, Obstacle }
public enum AggroType { Damage, Healing, Taunt, Environmental, Ability }

public class AggroAgent : MonoBehaviour { // 挂在怪物身上
    // 仇恨列表：Key=目标 (IAggroTarget), Value=当前仇恨值
    private Dictionary<IAggroTarget, float> threatTable = new Dictionary<IAggroTarget, float>();
    
    public EntityType monsterType; // 配置怪物自身类型，用于特殊行为

    // 在怪物受到伤害、感知到治疗、被嘲讽等时调用
    public void AddThreat(IAggroTarget source, AggroType type, float rawValue) {
        float threat = rawValue;
        // 应用来源的 GetThreatModifier
        threat *= source.GetThreatModifier(type);
        
        if (!threatTable.ContainsKey(source)) threatTable[source] = 0;
        threatTable[source] += threat;
        
        CleanThreatTable(); // 清理无效目标
        CheckSwitchTarget(); // 检查是否需要切换目标
    }

    // ... (Previous code)

    private IAggroTarget FindBestTarget() {
        IAggroTarget bestTarget = null;
        float highestThreat = -1f;

        foreach (var entry in threatTable) {
            var target = entry.Key;
            float rawThreat = entry.Value;
            
            if (!target.IsValid()) continue;

            // 1. 计算 EntityType 优先级修正
            float priorityMod = GetPriorityModifier(target.GetEntityType());
            
            // 2. 计算距离权重修正
            float distance = Vector3.Distance(transform.position, target.Position);
            float distanceFactor = 1f + (distanceSensitivityK / Mathf.Max(distance, 0.1f)); // 防止除以0
            
            // 3. 合成最终仇恨
            float finalThreat = rawThreat * priorityMod * distanceFactor;

            if (finalThreat > highestThreat) {
                highestThreat = finalThreat;
                bestTarget = target;
            }
        }
        return bestTarget;
    }

    private void CheckSwitchTarget() {
        IAggroTarget potentialTarget = FindBestTarget();
        if (potentialTarget == null || potentialTarget == currentTarget) return;

        float currentFinalThreat = CalculateFinalThreat(currentTarget);
        float newFinalThreat = CalculateFinalThreat(potentialTarget);

        // 阈值判定：防止 Ping-Ponging
        float thresholdMultiplier = (IsMeleeRange(potentialTarget)) ? 1.1f : 1.3f;
        
        if (newFinalThreat > currentFinalThreat * thresholdMultiplier) {
            SetTarget(potentialTarget);
        }
    }

    private float GetPriorityModifier(EntityType type) {
        // 这里可以配置化，或者读取 ScriptableObject 配置
        switch (type) {
            case EntityType.TankTower: return 5.0f;
            case EntityType.Player: return 2.0f;
            case EntityType.Nexus: return 10.0f; // 特殊处理
            default: return 1.0f;
        }
    }
}