al_fixcos - Online Linux Manual PageSection : 3
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Source : Allegro reference manual
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NAMEal_fixcos − Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
al_fixed al_fixcos(al_fixed x);
DESCRIPTIONThis 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 VALUEReturns the cosine of a fixed point binary format angle as a fixed point value. 0
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