fixsin

NAME

fixsin − Fixed point sine of binary angles. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

fixed fixsin(fixed x);

DESCRIPTION

This function finds the sine of a value using a lookup table. The input value must be a fixed point binary angle. Example:

fixed angle;
int result;

/* Set the binary angle to 90 degrees. */
angle = itofix(64);
/* The sine of 90 degrees is one. */
result = fixtoi(fixsin(angle));
ASSERT(result == 1);

RETURN VALUE

Returns the sine 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)