fixatan(3) - Linux man page

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