al_fixatan (3alleg5)

• #include <allegro5/allegro.h>
  
  al_fixed al_fixatan(al_fixed x)
  
  

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:

•     al_fixed result;
  
      /* Sets result to binary angle 13. */
      result = al_fixatan(al_ftofix(0.326));
  
  

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