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fixatan

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

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