apply_matrix(3)

✨ apply_matrix(3) ✨

okay bestie, we're doing an Allegro manual page today, and it's a short one but it's so useful. sit down, grab a strawberry, let's go 🍓

💖 NAME 💖

apply_matrix, apply_matrix_f — literally multiplies a point by a transformation matrix. that's the whole vibe. also: it lives in the Allegro game programming library, so it's giving game-dev main character energy 👑

🌸 SYNOPSIS 🌸

#include <allegro.h>

void apply_matrix(const MATRIX *m, fixed x, y, z, *xout, *yout, *zout);

void apply_matrix_f(const MATRIX_f *m, float x, y, z, *xout, *yout,
*zout);

yes the two functions are twins, no cap. one is the fixed girlie, one is the float girlie 💅

🦋 DESCRIPTION 🦋

so here's the tea: you've got a point (x, y, z) and you've got a transformation matrix m. this function takes that point, multiplies it by that matrix, and drops the result into (*xout, *yout, *zout).

that's it. that's the function. it ate and left no crumbs ✨

like — you hand it the point, it hands you back where the point ends up after the transformation. the way that works is genuinely so satisfying ngl 🫶

👀 SEE ALSO 👀

• matrix_mul(3)
• ex12bit(3)
• ex3d(3)
• exstars(3)

go read those if you want the full lore, iykyk 💜

reminder bestie: this page is from Allegro version 4.4.3 🎀 that's the source and the version, noted and slayed. mwah, bye! 💖🌈⭐