从未排序的加权列表中选择敌人

Question

我一直对为什么这不能正常工作感到头疼。我有一个列表可以改变每秒生成怪物的概率。我想从这个列表中选择一个随机加权的敌人。我在某个地方出错了，我认为它在"EnemyToSpawnNext = Enemies[sorted[T].Key].Enemie[0].EnemyPrefab;" 区域附近。

public GameObject EnemySelection()
{

    var sorted = TierProbability.Select((x, i) => new KeyValuePair<int, float>(i, x)).OrderBy(x => x.Value).ToList();
    List<int> idx = sorted.Select(x => x.Key).ToList();
    List<float> B = sorted.Select(x => x.Value).ToList();


    float P = UnityEngine.Random.Range(0, 1);
    float Sum_prob = 0;
    for (int T = 0; T < TotalNumberofTiers; T++)
    {

        Sum_prob += sorted[T].Value; 
        print(Sum_prob);
        if (Sum_prob >= P)
        {
            EnemyToSpawnNext = Enemies[sorted[T].Key].Enemie[0].EnemyPrefab;

            break;
        }
    }
    return EnemyToSpawnNext;

}

以下是创建概率列表的难度调整函数。

 public void DifficultyAdjustments()
{
    SecondsElapsed += 10; // for debugging

    Min_Tier += 10 * (End_Min_Tier - Start_Min_Tier) / (TimeinMinutes * 60);
    Peak_Tier += 10 * (End_Peak_Tier - Start_Peak_Tier) / (TimeinMinutes * 60);
    Max_tier += 10 * (End_Max_Tier - Start_Max_Tier) / (TimeinMinutes * 60);


    for (int T = 0; T < TotalNumberofTiers; T++)
    {
        if (T < Min_Tier)
        WeightT = 0;
    if (T > Max_tier)
        WeightT = 0;
    if (Min_Tier <= T & T < Peak_Tier)
        WeightT = 1 + (Max_weight - 1) / (Peak_Tier - Min_Tier) * (T - Min_Tier);
    if (Peak_Tier <= T & T < Max_tier)
        WeightT = 1 + (Max_weight - 1) / (Peak_Tier - Max_tier) * (T - Max_tier);
        TierWeights[T] = WeightT;
        TierProbability[T]  = WeightT / TierWeights.Sum();
    }
    print(EnemySelection()); // for debugging

}

Answer 1

问题是你的P

 float P = UnityEngine.Random.Range(0, 1);

这个P总是为零

改用这个：

float P = UnityEngine.Random.Range(0f, 1f);