Reign.Video.Camera.Zoom C# (CSharp) Method

        public void Zoom(float value, float stopRadis)
        {
            var vec = (LookAtPosition - Position);
            float dis = 0;
            vec = vec.Normalize(out dis);
            dis = ((dis-stopRadis) - value);
            if (dis < 0) value += dis;
            vec *= value;
            Position += vec;
            UpPosition += vec;
        }