void ComputeFrame() {
            i = 0;
            x = 0;
            uint* ti;
            fixed (uint* f = field) {
                t = (altFrame ? f + l : f);
                a = (altFrame ? f : f + l);
                bmpData = canvas.LockBits(bmpRect, ImageLockMode.ReadWrite, PixelFormat.Format32bppPArgb);
                currPos = (uint*)bmpData.Scan0;
                while (i != l) {
                    n = 0;
                    ti = t + i;
                    if (x != 0) if (*(ti - 1) == 1) n++; //left
                    if (x != (w - 1)) if (*(ti + 1) == 1) n++; //right
                    if (i > w) if (*(ti - w) == 1) n++; //top
                    if (i < (l - w)) if (*(ti + w) == 1) n++; //bottom
                    if (x != 0 && i > w) if (*(ti - w - 1) == 1) n++; //left top
                    if (x != 0 && i < (l - w)) if (*(ti + w - 1) == 1) n++; //left bottom
                    if (x != (w - 1) && i > w) if (*(ti - w + 1) == 1) n++; //right top
                    if (x != (w - 1) && i < (l - w)) if (*(ti + w + 1) == 1) n++; //right bottom

                    if (*(ti) == 1) {
                        *(a + i) = (uint)((n != 2 && n != 3) ? 0 : 1);
                        *currPos = col;
                    }
                    else {
                        *(a + i) = (uint)(n == 3 ? 1 : 0);
                        //if (fadeColors) {
                        //    if ((*currPos & 0x00ff0000) > (uint)(colLimit << 16)) *currPos -= (uint)(colDecVal << 16);
                        //    if ((*currPos & 0x0000ff00) > (uint)(colLimit << 8)) *currPos -= (uint)(colDecVal << 8);
                        //    if ((*currPos & 0x000000ff) > (uint)(colLimit)) *currPos -= (uint)(colDecVal);
                        //}
                        //else
                            *currPos = 0xff000000;
                    }
                    ++currPos;
                    ++i;
                    if (++x == w) x = 0;
                }
                canvas.UnlockBits(bmpData);
            }
        }