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identity_matrix(3alleg4) Allegro manual identity_matrix(3alleg4)

NAME

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

SYNOPSIS

#include <allegro.h>
extern MATRIX identity_matrix;
extern MATRIX_f identity_matrix_f;

DESCRIPTION

Global variables containing the 'do nothing' identity matrix. Multiplying by the identity matrix has no effect.
version 4.4.2 Allegro