| al_fixcos(3alleg5) | al_fixcos(3alleg5) |
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.
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