CSJ2K.j2k.wavelet.Subband.getSubband C# (CSharp) Method

        public virtual Subband getSubband(int x, int y)
        {
            Subband cur, hhs;

            // Check that we are inside this subband
            if (x < ulx || y < uly || x >= ulx + w || y >= uly + h)
            {
                throw new System.ArgumentException();
            }

            cur = this;
            while (cur.isNode)
            {
                hhs = cur.HH;
                // While we are still at a node -> continue
                if (x < hhs.ulx)
                {
                    // Is the result of horizontal low-pass
                    if (y < hhs.uly)
                    {
                        // Vertical low-pass
                        cur = cur.LL;
                    }
                    else
                    {
                        // Vertical high-pass
                        cur = cur.LH;
                    }
                }
                else
                {
                    // Is the result of horizontal high-pass
                    if (y < hhs.uly)
                    {
                        // Vertical low-pass
                        cur = cur.HL;
                    }
                    else
                    {
                        // Vertical high-pass
                        cur = cur.HH;
                    }
                }
            }

            return cur;
        }