man qscale_matrix () - Optimised routine for scaling an already generated matrix. Allegro game programming library.
NAME
qscale_matrix, qscale_matrix_f - Optimised routine for scaling an already generated matrix. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void qscale_matrix(MATRIX *m, fixed scale);
void qscale_matrix_f(MATRIX_f *m, float scale);
DESCRIPTION
Optimised routine for scaling an already generated matrix: this simply adds in the scale factor, so there is no need to build two temporary matrices and then multiply them together.