identity_matrix

Section: Allegro manual (3)
Updated: version 4.2.2
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NAME

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.