DOKK / manpages / debian 10 / allegro4-doc / fixtorad_r.3alleg4.en
fixtorad_r(3alleg4) Allegro manual fixtorad_r(3alleg4)

fixtorad_r - Constant to convert angles in fixed point format to radians. Allegro game programming library.

#include <allegro.h>

extern const fixed fixtorad_r;

This constant gives a ratio which can be used to convert a fixed point number in binary angle format to a fixed point number in radians. Example:


fixed rad_angle, binary_angle;
/* Set the binary angle to 90 degrees. */
binary_angle = 64;
/* Now convert to radians (about 1.57). */
rad_angle = fixmul(binary_angle, fixtorad_r);

fixmul(3alleg4), radtofix_r(3alleg4)

version 4.4.2 Allegro