/// <summary>
/// Produces a random stream predicated on a point source
/// </summary>
/// <param name="random">The point source</param>
/// <typeparam name="T">The point type</typeparam>
public static IEnumerable <T> Stream <T>(this IBoundPointSource <T> random)
where T : struct
{
while (true)
{
yield return(random.Next());
}
}
/// <summary>
/// Takes a specified number of distinct points from a source
/// </summary>
/// <param name="random">The random source</param>
/// <param name="count">The number of points to take</param>
/// <typeparam name="T">The element type</typeparam>
public static HashSet <T> TakeSet <T>(this IBoundPointSource <T> random, int count)
where T : struct
{
var src = random.Stream();
var set = src.Take(count).ToHashSet();
while (set.Count < count)
{
set.AddRange(src.Take(count / 2));
}
return(set);
}
internal static int Next(this IBoundPointSource <ulong> random, int max)
=> max >= 0 ? (int)random.Next((ulong)max)
: -(int)random.Next((ulong)(Int32.MaxValue + max));
/// <summary>
/// Selects the next sequence of values from the source
/// </summary>
/// <param name="random">The random source</param>
/// <param name="count">The number of values to select</param>
/// <typeparam name="T">The value type</typeparam>
public static IEnumerable <T> Take <T>(this IBoundPointSource <T> random, int count)
where T : struct
=> random.Stream().Take(count);
/// <summary> /// Creates a polyrand rng from a point source /// </summary> /// <param name="rng">The source rng</param> public static IPolyrand ToPolyrand(this IBoundPointSource <ulong> source) => new Polyrand(source);
internal Polyrand(IBoundPointSource <ulong> Points)
{
this.Points = Points;
this.Nav = default;
}
