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ur-whaleyesterday at 7:23 PM2 repliesview on HN

Not sure I understand ... no mention of an actual CAD engine backend ... did I miss it?

Or is this capable of generating STEP files directly from an LLM (which I doubt)?

[EDIT]: haha. the answer is hidden in:

.agents/skills/cad/requirements.txt

TL;DR:

    build123d

    ezdxf

    numpy

    trimesh

    vtk

and the engine is build123d, which, from its home page:

Build123d is a Python-based, parametric (BREP) modeling framework for 2D and 3D CAD. Built on the Open Cascade geometric kernel, it provides a clean, fully Pythonic interface for creating precise models suitable for 3D printing, CNC machining, laser cutting, and other manufacturing processes. Models can be exported to popular CAD tools such as FreeCAD and SolidWorks.

prbly worth mentioning in the README, I can't be the only one wondering out there.

Also: these things seem to be sprouting all over the place these days (a good thing!) ... CAD modeling using LLMs is clearly an idea whose time has come.


Replies

GorbachevyChasetoday at 2:02 AM

I don’t think its time has come. I think there are a lot of software folks that don’t understand what the actual pain points of professional engineers and CAD technicians are. I think there is a niche where text-to-CAD is good: hobby users who don’t want invest in learning a CAD software UI. For professionals, where results have dollar values, there needs to be a much deeper understanding of the problem domain to understand why enterprise CAD software sucks.

akiselevyesterday at 7:26 PM

Based on requirements.txt it uses build123d so OpenCascade is the geometric kernel (CAD engine backend)

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