al_fixtan(3)

🎀 NAME 🎀

Okay bestie, this is al_fixtan(3) from the Library Functions Manual, and it’s all about the Allegro 5 API ✨.

• al_fixtan — Allegro 5 API 💅

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✨ SYNOPSIS ✨

#include <allegro5/allegro.h>

al_fixed al_fixtan(al_fixed x);

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💖 DESCRIPTION 💖

So this function finds the tangent of a value using a lookup table — no cap, that’s literally the mechanic 🫶. The input value must be a fixed point binary angle. That’s the vibe check: fixed point binary angle or bust 💅.

Example incoming, bestie 👇:

al_fixed angle, res_a, res_b;
float dif;

angle = al_itofix(37);
/* Prove that tan(angle) == sin(angle) / cos(angle). */
res_a = al_fixdiv(al_fixsin(angle), al_fixcos(angle));
res_b = al_fixtan(angle);
dif = al_fixtof(al_fixsub(res_a, res_b));
printf("Precision error: %f\n", dif);

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🌸 RETURN VALUE 🌸

Returns the tangent of a fixed point binary format angle as a fixed point value. Periodt 💖.

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That’s the whole page, bestie 🫶. The footer energy is Allegro reference manual + al_fixtan(3), and there’s no date shown on this one — so consider this your cute lil sign-off from the Allegro reference manual 💖, page al_fixtan(3) ✨.