apply_quat(3alleg4)

✨ NAME ✨

okay so bestie, this is apply_quat — she multiplies a point by a quaternion 💫. Like, that's her whole thing. Part of the Allegro game programming library, in case you were wondering where she lives 🎀.

🌸 SYNOPSIS 🌸

#include <allegro.h>

void apply_quat(const QUAT *q, float x, y, z, *xout, *yout, *zout);

no cap, that's the whole signature 👑

💅 DESCRIPTION 💅

So here's the tea ☕ — apply_quat takes the point (x, y, z) and multiplies it by the quaternion q, then drops the glow-up into (*xout, *yout, *zout) ✨. Like, she rotates your point and hands you the new coordinates. Slay.

but bestie, listen 😭 — she is quite a bit slower than apply_matrix_f(). That's not a vibe check she passes. So only use her to translate a few points, okay? A tiny little handful. She's not built for crowds.

if you've got many points?? 🫶 it is much more efficient to call quat_to_matrix() first and then hit apply_matrix_f() — that's the iconic move, fr fr. Convert once, apply many. main character efficiency 🧚

and that's the whole page, bestie 💖

this little love letter comes to you from Allegro, version 4.4.3, and she's filed under apply_quat(3alleg4) in the manual. mwah, go rotate something cute 🦋🎀