Founder @neumannXYZ. Founder @shapr3D. Solving the problems CAD can't solve. Occasionally tweeting about how CAD works. Accelerating.
Joined March 2010
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This is awesome.
Do you use git to version control CAD STEP files?
I've added a diff to my STEP tool. Automatic PR comments showing what has changed graphically and in real engineering terms
github.com/pzfreo/step-diff-…
The picture is useful but the feature analysis is the core value (see below)
👀
SolidCraft 0.20.0 is out 🏗️
solidcraft.io
- Large assemblies are much faster: level of detail, GPU transparency and faster picking (25 see-through copies of a 2M-triangle part: ~10s per frame down to 2.8ms)
- Construction axes work for Circular Pattern and Revolve
- The camera stays put when you leave a sketch
- Fixed a Windows stutter caused by 3D mouse scanning
- New home page and Preferences
that's great, but can we have a reactor that turns mercury into RAM and GPUs
Last month, we demonstrated high-rate alchemy: turning mercury into real, stable gold, beating CERN’s record by a factor of 10.
Last week, we enriched isotopes in the world’s most powerful plasma centrifuge, beating the Soviet record that stood for 40 years.
Now, we’re building a fusion reactor in San Francisco to achieve record power density.
oddly enough it turns out that just like in manufacturing, where the factory is the product, in software the harness is the product
István Csanády retweeted
We started Arda in 2025 to speed up American manufacturing. We have spent the last year building with Anduril as our design partner. Today we are launching the company publicly on CNBC and announcing our Series A: $160M at a $1.5B valuation.
Our platform helps manufacturers design and operate manual assembly lines, putting designs into production faster now. Next we'll build automated lines that can be reconfigured as quickly as human workers, letting America make products that now require armies of workers in Asia.
This is an great talk about implicits and the challanges with using implicits with b-rep based systems
One of my hero's in CAD is George Allen. Here is his latest presentation comparing BREPs and Implicit geometry from the #CDFAM conference in Japan: youtube.com/watch?v=P0gAMHoK…
George Allen called out an oversimplification in my previous post - and of course he's right! If you don't know him, he's one of the Greats of Geometry, currently working with @nTopology , and previously he worked on Parasolid too! So what does that mean in practice 👇
and your numerical stability goes down, because as the NURBS knot spans (look it up what it is) approach zero, the numerical algorithms working with them become ill conditioned.
state of X lately
Ohh. Are you also making a BREP kernel. I have been working on mine for a little while. next.BREP.io
Would defiantly like to chat.
Also one correction: SMlib has partial support for some canonical surface types, but they're very limited, and far from complete.
CAD-as-code
nitter.cf/istvan_csanady/status/…
Is SMlib still useful? Absolutely yes. I see it as a potential alternative to OpenCASCADE. I think significant improvements could be done to it, at a relatively low cost. Will it become a tier 1 kernel? Nope, at least not more easily than building a brand new tier 1 kernel.
