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Assets/Script/ArcherSkill.cs

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+using System.Collections;
+using UnityEngine;
+
+public class ArcherSkill : UnitSkill
+{
+    [Min(1)]
+    public int volleyArrowCount = 3;
+
+    [Min(0f)]
+    public float volleyArrowDamageMultiplier = 0.7f;
+
+    [Min(0f)]
+    public float volleyArrowInterval = 0.15f;
+
+    private Coroutine volleyCoroutine;
+
+    public override void ReleaseSkill()
+    {
+        if (volleyCoroutine != null)
+        {
+            StopCoroutine(volleyCoroutine);
+        }
+
+        volleyCoroutine = StartCoroutine(FireVolley());
+    }
+
+    private IEnumerator FireVolley()
+    {
+        for (int i = 0; i < volleyArrowCount; i++)
+        {
+            // 三连射优先攻击当前目标；目标阵亡后剩余箭矢改打最近敌人。
+            GameObject volleyTarget = unit.Target != null ? unit.Target : FindNearestOpponent();
+            if (volleyTarget == null)
+            {
+                break;
+            }
+
+            unit.FireSkillProjectile(volleyTarget, volleyArrowDamageMultiplier);
+            yield return new WaitForSeconds(volleyArrowInterval);
+        }
+
+        volleyCoroutine = null;
+    }
+
+    private GameObject FindNearestOpponent()
+    {
+        string opponentTag = unit.OpponentTag;
+        if (string.IsNullOrEmpty(opponentTag))
+        {
+            return null;
+        }
+
+        GameObject nearestOpponent = null;
+        float nearestSqrDistance = float.PositiveInfinity;
+        GameObject[] opponents = GameObject.FindGameObjectsWithTag(opponentTag);
+        foreach (GameObject opponent in opponents)
+        {
+            if (opponent == null || opponent.transform.root == unit.transform.root)
+            {
+                continue;
+            }
+
+            float sqrDistance = (opponent.transform.position - unit.transform.position).sqrMagnitude;
+            if (sqrDistance < nearestSqrDistance)
+            {
+                nearestSqrDistance = sqrDistance;
+                nearestOpponent = opponent;
+            }
+        }
+
+        return nearestOpponent;
+    }
+}