fixcos man page

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)

Referenced By

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

version 4.4.2 Allegro Allegro manual