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al_fixcos(3) al_fixcos(3)

al_fixcos - Allegro 5 API


#include <allegro5/allegro.h>
al_fixed al_fixcos(al_fixed x);

    

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);

    

Returns the cosine of a fixed point binary format angle as a fixed point value.
Allegro reference manual

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