/// <summary>
/// 选择的规则是：
/// 1. 判定EffectTarget(范围）
/// 2. 判定flag-剔除友军，敌军等概念, 进入战斗状态的则再最后判定(状态可能目前并不会去设定）
/// 3. 判定EffectTargetType-剔除
/// 4. 每个NPC的概率
/// 5. 判定EffectTargetStatusReject-剔除
/// 6. 选择目标的数量不能超过上限
///
/// </summary>
/// <param name="caster">Caster.</param>
/// <param name="targets">Targets.</param>
/// <param name="efCfg">Ef cfg.</param>
public IEnumerable <ServerNPC> Select(ServerNPC caster, IEnumerable <ServerNPC> targets, EffectConfigData efCfg)
{
#if DEBUG
Utils.Assert(efCfg == null, "Effect Selector can't find target unless EffectConfigData isn't null");
#endif
List <ServerNPC> reTarget = null;
IEnumerable <ServerNPC> itor = null;
/// 1. 判定EffectTarget(范围）2. 判定flag-剔除友军，敌军等概念
reTarget = areaSelector.SelectArea(caster, targets, efCfg);
/// 3. 判定EffectTargetType-剔除 建筑物
LifeNPCType lifeType = efCfg.EffectTargetType.toPositive();
itor = reTarget.Where(n => lifeType.check(n.data.configData.type));
/// 4. 每个NPC的概率 5.判定EffectTargetStatusReject
itor = itor.Where(n => {
ServerLifeNpc lifeTar = n as ServerLifeNpc;
bool ok = random.happen(efCfg.Prob);
if (lifeTar != null)
{
if (ok)
{
return(!lifeTar.curStatus.AnySame(efCfg.EffectTargetStatusReject));
}
else
{
return(ok);
}
}
else
{
return(ok);
}
}
);
///6. 选择的目标数量不能超过上限
if (efCfg.EffectLimit > 0)
{
itor = itor.Take(efCfg.EffectLimit);
}
else if (efCfg.EffectLimit == 0)
{
itor = new List <ServerNPC>().AsEnumerable <ServerNPC>();
}
return(itor);
}