DOKK / manpages / debian 10 / allegro5-doc / al_fixhypot.3alleg5.en
al_fixhypot(3alleg5) al_fixhypot(3alleg5)

al_fixhypot - Allegro 5 API

#include <allegro5/allegro.h>
al_fixed al_fixhypot(al_fixed x, al_fixed y)
    

Fixed point hypotenuse (returns the square root of x*x + y*y). This should be better than calculating the formula yourself manually, since the error is much smaller.

Allegro reference manual