EQN(nged)

Allows the user to rotate the face of an ARB shape by providing the coefficients of an equation of the desired plane for the face.

📅 published 7.44.0, from nixpkgs unstable

💅 eqn — the one where you rotate an ARB face with math ✨

okay so real talk, this page lives in the BRL-CAD User Commands manual (the nged girlies know 💖), and honestly? it's giving geometry glow-up. let's get into it 🎀

✨ NAME ✨

eqn — lets you rotate the face of an ARB shape by handing it the coefficients of an equation for the plane you want that face to be on. that's it, that's the whole vibe 🦋

🌸 SYNOPSIS 🌸

eqn {A B C} []

💜 DESCRIPTION 💜

okay so bestie, here's the tea ☕ — eqn lets you rotate the face of an ARB shape by providing the coefficients of an equation of the desired plane for that face. the coefficients A, B, and C come straight from the plane equation:

Ax + By + Cz = D

now for the important part, no cap: you have to actually be editing an ARB shape and be rotating a face of that ARB, otherwise this command does literally nothing. zero effect. main character energy denied 💀

and when you enter that state? the system asks you which of the face vertices should be held constant, and from that info the D coefficient of the equation gets determined. slay, math does the rest 🔥

🌈 EXAMPLES 🌈

this example shows eqn being used to rotate the face of the ARB you're editing so it's parallel to the xy plane. iconic behavior honestly 👑

Example 1. Rotate the face of an ARB to be parallel to the xy plane.

mged> eqn 0 0 1

and then — the face of the ARB is rotated to be parallel to the xy plane. periodt 💅✨

👑 AUTHOR 👑

BRL-CAD Team — shoutout the squad 🫶

🐛 BUG REPORTS 🐛

if you find a bug or a problem, don't suffer in silence bestie 😭 — reports of bugs or problems should be submitted via electronic mail to:

devs@brlcad.org

they literally want to hear from you, fr fr 📬

🧚 tiny reminder: if you're not mid-edit on an ARB and mid-rotate on one of its faces, eqn is gonna sit there doing absolutely nothing and you'll be like "why" — that's why 💀

and that's the whole page, bestie 💖 this one's from the BRL-CAD collection, EQN(nged), and yes it's giving very much BRL-CAD energy, dated BRL-CAD — go forth and rotate those faces ✨🎀🌸

📦 where this page comes from