Artemis.Engine.Maths.SpecialFunctions.Asinh C# (CSharp) Method

        public static double Asinh(double xx)
        {
            double x;
            int sign;
            if (xx == 0.0) return xx;
            if (xx < 0.0)
            {
                sign = -1;
                x = -xx;
            }
            else
            {
                sign = 1;
                x = xx;
            }
            return sign * Math.Log(x + Math.Sqrt(x * x + 1));
        }