69 lines
2.6 KiB
C#
69 lines
2.6 KiB
C#
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）
|
|
}
|
|
}
|
|
}
|