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identity_quat(3)                Allegro manual                identity_quat(3)

NAME
       identity_quat - Global variable containing the identity quaternion.
       Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       extern QUAT identity_quat;

DESCRIPTION
       Global variable containing the 'do nothing' identity quaternion.
       Multiplying by the identity quaternion has no effect.

Allegro                          version 4.4.2                identity_quat(3)