bionic (3) fixcos.3alleg4.gz

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(3alleg4),   ex3buf(3alleg4),    exblend(3alleg4),    excustom(3alleg4),    exspline(3alleg4),
       exupdate(3alleg4)