public static Vector2 NextVector2(this RNG rng)
{
return(new Vector2(rng.NextFloat1(), rng.NextFloat1()));
}
/// <summary>Randomly select one item.</summary>
/// <param name="rng">The RNG.</param>
/// <returns>Index of the selected item.</returns>
public int Select(RNG rng)
{
int sample = GetSample(rng);
return(Select(sample));
}
/// <summary>Randomly select one item.</summary>
/// <param name="rng">The RNG.</param>
/// <returns>Selected item.</returns>
public T SelectItem(RNG rng)
{
int index = Select(rng);
return(Items[index]);
}
protected int GetSample(RNG rng)
{
// must be 1-based sample
return(rng.NextIntRange(TotalWeights) + 1);
}
