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fixcos

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)