xx component of the affine transformation
yx component of the affine transformation
xy component of the affine transformation
yy component of the affine transformation
X translation component of the affine transformation
Y translation component of the affine transformation
Sets matrix to be the affine transformation given by xx, yx, xy, yy, x0, y0. The transformation is given by: <programlisting> x_new = xx * x + xy * y + x0; y_new = yx * x + yy * y + y0; </programlisting>