/// <summary>
/// 配列の要素の重みを考慮して要素のインデックスを返す
/// </summary>
public static int GetUnityRandomIndexWithWeight(params int[] weightArray)
{
int totalWeight = 0;
for (int i = 0; i < weightArray.Length; i++)
{
totalWeight += weightArray[i];
}
int randomValue = RandomUtil.Range(1, totalWeight + 1);
int index = -1;
for (var i = 0; i < weightArray.Length; ++i)
{
if (weightArray[i] >= randomValue)
{
index = i;
break;
}
randomValue -= weightArray[i];
}
return(index);
}
/// <summary>
/// 渡された配列の中からランダムで1つを返す
/// </summary>
public static T GetUnityRandomValue <T>(params T[] values)
{
return(values[RandomUtil.Range(0, values.Length)]);
}
/// <summary>
/// 指定された確率でtrueを返す
/// </summary>
public static bool GetUnityRandomBool(int probability)
{
return(RandomUtil.Range(0, 100) < probability);
}