NewTOAPIA.Drawing.Transform2D.Combine C# (CSharp) Method

        public bool Combine(XFORM b)
        {
            if (b.eM11 * b.eM22 == b.eM12 * b.eM21)
                return false;

            XFORM a = new XFORM(fMatrix);

            // 11 12   11 12
            // 21 22   21 22
            fMatrix.eM11 = a.eM11 * b.eM11 + a.eM12 * b.eM21;
            fMatrix.eM12 = a.eM11 * b.eM12 + a.eM12 * b.eM22;
            fMatrix.eM21 = a.eM21 * b.eM11 + a.eM22 * b.eM21;
            fMatrix.eM22 = a.eM21 * b.eM12 + a.eM22 * b.eM22;
            fMatrix.eDx = a.eDx * b.eM11 + a.eDy * b.eM21 + b.eDx;
            fMatrix.eDy = a.eDx * b.eM12 + a.eDy * b.eM22 + b.eDy;

            return true;
        }