dot_product(3)

💖 dot_product — the Allegro manual, but make it cute 💖

okay bestie, so this is a page from the Allegro manual — that's the game programming library, iykyk — and today we're talking about the dot product. yes THE dot product. the little math baddie that carries half of your graphics code on its back. no cap.

✨ NAME ✨

dot_product, dot_product_f — calculates the dot product. Allegro game programming library.

periodt. that's the whole name section. two functions, one job, zero notes.

🌸 SYNOPSIS 🌸

#include <allegro.h>

fixed dot_product(fixed x1, y1, z1, x2, y2, z2);

float dot_product_f(float x1, y1, z1, x2, y2, z2);

not me showing you the include first because of course you need #include <allegro.h>, we're not animals 💅

🦋 DESCRIPTION 🦋

so basically — Calculates the dot product (x1, y1, z1) . (x2, y2, z2), returning the result.

that's it. that's the description. you hand it two vectors, it hands you back a single number, and that number is doing SO much heavy lifting for you behind the scenes. it's giving main character energy in a supporting role. the math girlies ate.

also quick vibe check on the two flavours: there's dot_product, which takes fixed values, and dot_product_f, which takes float values. same energy, different types. pick the one that matches your data and keep it moving 💜

👑 SEE ALSO 👑

• cross_product(3)
• normalize_vector(3)
• exstars(3)

go read those too, bestie, they're the friend group. cross_product(3) is the chaotic one, normalize_vector(3) is the one who keeps everyone in check, and exstars(3) is the demo that shows it all off. obsessed. 🫶

lowkey important reminder: this is documented for Allegro version 4.4.3, and the page itself is dot_product(3). so if you're on a different version, double-check your flags and your types, because we do not guess at behaviour around here 💀

okay that's the whole page, love you, go multiply some vectors, mwah 😭🎀💖