gistfile1.cs

        private bool CheckThreshold(Vector4[] colors, out Vector4 average)
        {
            int i;
            Vector4 a = new Vector4();
            Vector4 min = new Vector4(1);
            Vector4 max = new Vector4(0);

            for (i = 0; i < colors.Length; i++)
            {
                Vector4 c = colors[i];

                Vector4.Min(ref min, ref c, out min);
                Vector4.Max(ref max, ref c, out max);

                a += c;
            }

            a /= i;
            average = a;

            return ((a - _nodeThreshold) <= min && min <= a) || (a >= max && max >= (a + _nodeThreshold));
        }

HUE