man radtofix_r (3): Constant to convert radians to fixed point angles. Allegro game programming library.

radtofix_r(3) Constant to convert radians to fixed point angles. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

extern const fixed radtofix_r;

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

   fixed rad_angle, binary_angle;
   ...
   binary_angle = fixmul(rad_angle, radtofix_r);