fixatan(3)

✨ NAME ✨

fixatan — fixed point inverse tangent lookup table 💖 and like, it's part of the Allegro game programming library, obviously.

🦋 SYNOPSIS 🦋

#include <allegro.h>

fixed fixatan(fixed x);

🌸 DESCRIPTION 🌸

okay so bestie, here's the tea: this function finds the inverse tangent of a value, and it does it with a lookup table. Not vibing with slow math today, she's just looking it up. 💅

The input value must be a fixed point radian. And remember the whole point of an inverse tangent: it's the value whose tangent is x. That's it, that's the whole assignment. 🎀

Example, because we love a demonstration:

fixed result;

/* Sets `result' to binary angle 13. */
result = fixatan(ftofix(0.326));

See how result gets set to binary angle 13? iconic. ✨

👑 RETURN VALUE 👑

It returns the inverse tangent of a fixed point value, measured as a fixed point binary format angle. That's the return vibe, no notes. 💜

💀 SEE ALSO 💀

ngl bestie… there is literally nothing here. The original page lists zero other entries. No cross-references, no friends, no plus-ones. She's a solo act. 🙈

and that's the whole page, fr fr 🫶 — this was the fixatan(3) page from the Allegro manual, version 4.4.3. mwah, go look up some tangents 💖