GRID2MODEL_LU(nged)

convert grid xy to model coordinates (local units)

📅 published 7.44.0, from nixpkgs unstable

💅 GRID2MODEL_LU 💅

okay bestie, welcome to the grid2model_lu page from the nged manual — this one's short and sweet and honestly kind of a little math queen. let's get into it 🫶

✨ NAME ✨

grid2model_lu — convert grid xy to model coordinates (local units). that's it, that's the whole vibe 🎀

🌸 SYNOPSIS 🌸

grid2model_lu x y

🦋 DESCRIPTION 🦋

so the grid2model_lu command takes a 2D grid offset — in local units — and turns it into 3D model-space coordinates, also in local units. no cap, that's the whole job 💖

the two arguments, u and v, are the horizontal and vertical grid offsets from the model origin, projected into the current view's grid plane. and the Z component? treated as 0. flat. grounded. main character energy 🧚

here's the tea on how it actually does it ☕: the command projects the model origin into view space, adds the scaled grid offset, then inverse-transforms back through the view-to-model matrix. the result is a 3-component model-space point in local units. every single scale factor uses the current view's gv_scale plus the database unit conversions 🔥

and if you ever need to go the other way? the inverse operation is model2grid_lu. they're a matching set, your honor 👑

⭐ EXAMPLES ⭐

Example 1. Convert a grid offset to model coordinates

mged> grid2model_lu 50 25

returns the 3D model-space coordinates (in local units) corresponding to a 2D grid position 50 units right and 25 units up from the projected model origin. slay 💅

👑 AUTHOR 👑

BRL-CAD Team — icons only, we stan 💜

💀 BUG REPORTS 💀

found a bug or a problem? don't suffer in silence, bestie 😭 send the details via electronic mail to devs@brlcad.org. they want to hear it fr fr 🙈

and that's the page!! source: BRL-CAD, manual entry GRID2MODEL_LU(nged) — til next time, go convert something cute 🌈💖✨

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