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

       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));

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

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

Allegro                                           version 4.4.3                                 fixatan(3alleg4)

#include<allegro.h>fixedfixatan(fixedx);