feat(enemy): EnemyAttackSelector 选招器(射程+冷却+LOS+着地过滤,两模式选招)+单测

2026-07-24 12:15:41 +08:00
parent 2cf0d6b1a9
commit 04a267b69f
2 changed files with 176 additions and 0 deletions
@@ -0,0 +1,68 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace BaseGames.Enemies.Abilities
+{
+    /// <summary>
+    /// 多攻击选招器：从候选（category==Attack）里按"射程 + 冷却 + LOS + 着地"过滤，
+    /// 再按 <see cref="AttackSelectionMode"/> 选一个。纯逻辑、无 MonoBehaviour 依赖，可单测。
+    /// </summary>
+    public sealed class EnemyAttackSelector
+    {
+        private readonly List<IAttackCandidate> _candidates;
+
+        public EnemyAttackSelector(IEnumerable<IAttackCandidate> candidates)
+            => _candidates = new List<IAttackCandidate>(candidates);
+
+        public int Count => _candidates.Count;
+
+        private static bool Eligible(IAttackCandidate c, bool hasLOS, bool grounded)
+            => c != null && c.CanUse && c.InAttackRange()
+               && (!c.RequiresLineOfSight || hasLOS)
+               && (!c.RequiresGrounded    || grounded);
+
+        public bool HasEligible(bool hasLOS, bool grounded)
+        {
+            for (int i = 0; i < _candidates.Count; i++)
+                if (Eligible(_candidates[i], hasLOS, grounded)) return true;
+            return false;
+        }
+
+        public IAttackCandidate Select(bool hasLOS, bool grounded, AttackSelectionMode mode)
+            => mode == AttackSelectionMode.Priority
+                ? SelectByPriority(hasLOS, grounded)
+                : SelectByWeight(hasLOS, grounded);
+
+        private IAttackCandidate SelectByPriority(bool hasLOS, bool grounded)
+        {
+            IAttackCandidate best = null;
+            for (int i = 0; i < _candidates.Count; i++)
+            {
+                var c = _candidates[i];
+                if (!Eligible(c, hasLOS, grounded)) continue;
+                if (best == null || c.Priority > best.Priority) best = c; // 并列取首个
+            }
+            return best;
+        }
+
+        private IAttackCandidate SelectByWeight(bool hasLOS, bool grounded)
+        {
+            float total = 0f;
+            for (int i = 0; i < _candidates.Count; i++)
+            {
+                var c = _candidates[i];
+                if (Eligible(c, hasLOS, grounded)) total += Mathf.Max(0f, c.Weight);
+            }
+            if (total <= 0f) return SelectByPriority(hasLOS, grounded); // 权重全 0 → 退化为确定性取首个合格
+            float roll = Random.value * total;
+            for (int i = 0; i < _candidates.Count; i++)
+            {
+                var c = _candidates[i];
+                if (!Eligible(c, hasLOS, grounded)) continue;
+                roll -= Mathf.Max(0f, c.Weight);
+                if (roll <= 0f) return c;
+            }
+            return null; // 理论不达（浮点边界兜底）
+        }
+    }
+}