The matrix elements for the model and viewing transforms are held in XFORM structures:

fxM11
fxM12
fxM21
fxM22
lM41
lM42

M11, M12, M21, and M22 are fixed-point numbers represented as signed four-byte integers with a notational binary point between bits 16 and 15:

     +2.5 is represented by 00028000H
     -2.5 is represented by FFFD8000H
     -0.5 is represented by FFFF8000H

M41 and M42 are signed four-byte numbers.