public int RandomResult()
{
int r = random.Next(0, _totalWeight);
int weight = 0;
foreach (WeightItem item in _weights)
{
weight += item.iWeight;
if (weight >= r)
{
return(item.ID);
}
}
return(-1);
}
/// <summary>
/// 随机从 0 ~ max-1 中取出不重复的 num 个整数
/// @wangzhenhai
/// </summary>
public static int[] GetRandom(int num, int max, MersenneTwisterRandom r)
{
if (num < 0 || max < 0 || num > max)
{
return(null);
}
int[] result = new int[num];
int[] seed = new int[max];
for (int i = 0; i < max; i++)
{
seed[i] = i;
}
for (int i = 0; i < num; i++)
{
int index = r.Next(0, max - i);
result[i] = seed[index];
seed[index] = seed[num - i - 1];
}
return(result);
}
public static int MTRandom(int min, int max, MersenneTwisterRandom mtRandom)
{
return(mtRandom.Next(min, max));
}
