Category5.Tornado.UpdateRotationalSpeed C# (CSharp) Method

        private void UpdateRotationalSpeed(float elapsedMilliseconds)
        {
            float lowerLimit = 1f * (float)Math.Sqrt(Radius);
            float upperLimit = 5f * (float)Math.Sqrt(Radius);

            RotationalSpeed = RotationalSpeed + 1f * (float)Math.Sqrt(0.1f * Radius) * MouseControl.RotationalAccelerationFactor - ((float)((0.001 * (double)RotationalSpeed) + (RotationalSpeed > upperLimit ? (0.001 * (double)RotationalSpeed) : 0.0))) * elapsedMilliseconds;

            // keep a minimum speed
            if (RotationalSpeed < lowerLimit)
                RotationalSpeed = lowerLimit;
        }