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al_fixcos(3) al_fixcos(3)
NAME
al_fixcos - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
al_fixed al_fixcos(al_fixed x);
DESCRIPTION
This function finds the cosine of a value using a lookup table. The
input value must be a fixed point binary angle.
Example:
al_fixed angle;
float result;
/* Set the binary angle to 45 degrees. */
angle = al_itofix(32);
/* The cosine of 45 degrees is about 0.7071. */
result = al_fixtof(al_fixcos(angle));
assert(result > 0.7 && result < 0.71);
RETURN VALUE
Returns the cosine of a fixed point binary format angle. The return
value will be in radians.
Allegro reference manual al_fixcos(3)
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