debian man page for fixatan

fixatan(3alleg4)						  Allegro manual						  fixatan(3alleg4)

NAME
       fixatan - Fixed point inverse tangent lookup table. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       fixed fixatan(fixed x);

DESCRIPTION
       This function finds the inverse tangent of a value using a lookup table.  The input value must be a fixed point radian. The inverse tangent
       is the value whose tangent is `x'. Example:

	  fixed result;

	  /* Sets `result' to binary angle 13. */
	  result = fixatan(ftofix(0.326));

RETURN VALUE
       Returns the inverse tangent of a fixed point value, measured as a fixed point binary format angle.

SEE ALSO
Allegro 							   version 4.4.2						  fixatan(3alleg4)