fixcos man page on DragonFly

fixcos man page on DragonFly

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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),	 exup‐
       date(3)

Allegro				 version 4.4.2			     fixcos(3)

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