public static T Clamp<T>(this T value, T min, T max, IComparer<T> comparer = null) {
	if (comparer.Equals(null))
		comparer = Comparer<T>.Default;

	if (comparer.Compare(value, min) <= 0) {
		return min;
	} else if (comparer.Compare(value, max) >= 0) {
		return max;
	} else {
		return value;
	}
}