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fixatan(3) Allegro manual fixatan(3)
NAME
fixatan - Fixed point inverse tangent lookup table. Allegro game pro‐
gramming library.
SYNOPSIS
#include <allegro.h>
fixed fixatan(fixed x);
DESCRIPTION
This function finds the inverse tangent of a value using a lookup ta‐
ble. 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(3)
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