NAME¶

fixcos - Fixed point cosine of binary angles. Allegro game programming library.

SYNOPSIS¶

#include <allegro.h>

fixed fixcos(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:

   fixed angle;


   float result;


   


   /* Set the binary angle to 45 degrees. */


   angle = itofix(32);


   /* The cosine of 45 degrees is about 0.7071. */


   result = fixtof(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.

SEE ALSO¶

, ex12bit(3), ex3buf(3), exblend(3), excustom(3), exspline(3), exupdate(3)