COMB_STD(nged)

create or modify a combination using standard Boolean notation

📅 published 7.44.0, from nixpkgs unstable

💅 COMB_STD (nged) — from the BRL-CAD User Commands manual, bestie

okay so you found the comb_std page, welcome, this one's genuinely a lil shortcut icon and i'm obsessed 🎀

✨ NAME ✨

comb_std, c — create or modify a combination using standard Boolean notation. yes, the whole thing, two names, one vibe 👑

🦋 SYNOPSIS 🦋

comb_std comb_name [op1 object1 [op2 object2 ...]]
c comb_name [op1 object1 [op2 object2 ...]]

🌸 DESCRIPTION 🌸

okay so here's the tea ☕ — the comb_std command (which also answers to c, its cute lil nickname) creates or modifies a combination using standard Boolean operators. no cap.

If comb_name doesn't already exist, it gets created. If it does exist? The new members just get appended to it. the way that it's that chill 😌

Each member is specified as an operator-object pair:

  • u or + — union
  • - — subtraction
  • + — intersection (use + only in contexts where it is unambiguous)
⚠️ bestie look at that list again — + shows up twice, once for union and once for intersection. that's not me being messy, that's literally the page. so only reach for + when it's unambiguous, k? 🙈

Members are listed in order: the first operator applies between the combination and the first object; subsequent operators apply between successive objects. it's giving reading left to right, main character energy, no skips 🫶

comb_std (alias c) is a simplified alternative to comb that uses infix Boolean expression parsing similar to traditional MGED syntax. lowkey the easy mode of comb, fr fr ✨

🔥 EXAMPLES 🔥

Example 1. Create a combination with union and subtraction

mged> c vehicle.c u hull.r u engine.r - hole.r

Creates vehicle.c with hull.r and engine.r unioned, then hole.r subtracted. ate and left no crumbs 💅

Example 2. Use the c alias

mged> c plate.c u top.s u bottom.s

Creates plate.c as the union of top.s and bottom.s using the short alias. short, sweet, iconic ⭐

💜 SEE ALSO 💜

  • comb(nged) — the big sibling
  • group(nged)
  • region(nged)

go read those too, iykyk 🌈

🧚 AUTHOR 🧚

BRL-CAD Team — kings of the geometry world, periodt 👑

😭 BUG REPORTS 😭

Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org. pls do it, they're literally asking, and bugs hate to see us coming 💀

🌟 that's the whole page bestie, you're so ready

mwah 💋 — this little number comes to you from the BRL-CAD crew, straight out of the COMB_STD(nged) page in the BRL-CAD User Commands manual. go build something gorgeous ✨

📦 where this page comes from