fixcos(3)                       Allegro manual                       fixcos(3)



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)



Allegro                          version 4.2.3                       fixcos(3)
