DOKK / manpages / debian 10 / allegro4-doc / identity_matrix_f.3alleg4.en
identity_matrix(3alleg4) Allegro manual identity_matrix(3alleg4)

identity_matrix, identity_matrix_f - Global containing the identity matrix. Allegro game programming library.

#include <allegro.h>

extern MATRIX identity_matrix;

extern MATRIX_f identity_matrix_f;

Global variables containing the 'do nothing' identity matrix. Multiplying by the identity matrix has no effect.

version 4.4.2 Allegro