Provided by: allegro4-doc_4.4.2-4_all

**NAME**

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

**SYNOPSIS**

#include<allegro.h>externMATRIXidentity_matrix;externMATRIX_fidentity_matrix_f;

**DESCRIPTION**

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