General Transformation Matrix -- Elements in the 1st column (Ax, Ay, Az) are the components of a vector related to the base system which represents the positive X-axis of the auxiliary system. Elements in the 2nd column (Bx, By, Bz) are the components of a vector related to the base system which represents the positive Y axis. Elements in the 3rd column (Cx, Cy, Cz) are the components of a vector related to the base system which represents the positive Z axis. Elements in the 4th column (Dx, Dy, Dz) define the origin of the auxiliary system relative to the base system. (Intcom 3979) and (Dblcoms 751 - 762)