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This is MicroCAD. The programming language for your 3D projects. You can design your own Lego block in a few lines of code, ready to be exported as an STL file for 3D printing.

116,420 views • 11 months ago •via X (Twitter)

117 Comments

Marco Franzon's profile picture
Marco Franzon11 months ago

Oh cool, looks pretty similar

guille's profile picture
guille11 months ago

have you seen build123d? currently messing around with it, it's pretty neat imo

Marco Franzon's profile picture
Marco Franzon11 months ago

It seems really great with a lot of features.

guille's profile picture
guille11 months ago

yeah; one thing is that it is actually built on Python which is (a) nice in the sense that you can leverage all of Python's standard tools but (b) annoying in the sense that you kind of have to work _within_ Python's "way of doing things" which may make things clunkier

guille's profile picture
guille11 months ago

overall, it's been pretty smooth sailing; really the weird thing is mostly getting used to referring to edges/vertices/etc in terms of other objects instead of being able to click on them and set constraints

guille's profile picture
guille11 months ago

but that's less specific to this and more just remembering that you can do it/what the commands are to filter/remove/sort/sort_by_distance/etc

Lisandro Iaffar's profile picture
Lisandro Iaffar11 months ago

Cool project!! You might also take a look at cadquery:

Marco Franzon's profile picture
Marco Franzon11 months ago

Thanks! Never heard about!

Lisandro Iaffar's profile picture
Lisandro Iaffar11 months ago

My pleasure! It's the CAD engine of @FreeCADNews , so it's fully featured, and can be used both within freecad, and outside of it, as standalone software. A cool aspect of it is that it works with STEP geometry, not only STL, which is much easier to work with in any other CAD.

Marco Franzon's profile picture
Marco Franzon11 months ago

@FreeCADNews Veery interesting!! Thank you for sharing!

Jordan Noone 🇺🇸's profile picture
Jordan Noone 🇺🇸11 months ago

Already exists!

Marco Franzon's profile picture
Marco Franzon11 months ago

ohh fine I didn't know. How it works? with microcad?

Jordan Noone 🇺🇸's profile picture
Jordan Noone 🇺🇸11 months ago

We have a scripting language at @zoodotdev called KCL ( and build a hybrid GUI around it where you can do both prompt-based and traditional edits.

Marco Franzon's profile picture
Marco Franzon11 months ago

@zoodotdev Ohhh I see, never heard about it. Thanks for sharing.

Jordan Noone 🇺🇸's profile picture
Jordan Noone 🇺🇸11 months ago

@zoodotdev

aXes Quest 👾 Coding Toy's profile picture
aXes Quest 👾 Coding Toy11 months ago

I made a toy where you can code voxel art and MUCH MURE

Marco Franzon's profile picture
Marco Franzon11 months ago

the UI is awesome. love it

Steve Coast's profile picture
Steve Coast11 months ago

…OpenSCAD with cooler UI

Marco Franzon's profile picture
Marco Franzon11 months ago

at least there is something different

Minmin Gong's profile picture
Minmin Gong11 months ago

You know there is an app called OpenSCAD, right?

Marco Franzon's profile picture
Marco Franzon11 months ago

I didn't know, now I know it. But still I think this is fine.

yapcine's profile picture
yapcine11 months ago

This is literally CADAM

Marco Franzon's profile picture
Marco Franzon11 months ago

Oh, cool, never heard about.

sanjay prasad hs's profile picture
sanjay prasad hs11 months ago

This seems like a really cool thing. We should definitely hook an LLM into it and see where it goes.

Marco Franzon's profile picture
Marco Franzon11 months ago

This is what I am doing in the web editor mate

OtivDev's profile picture
OtivDev11 months ago

@sanjuhs123 Curious to see how it performs, I did the same but with blender backend (tried JSCAD as well), link in my bio if you want to try

Marco Franzon's profile picture
Marco Franzon11 months ago

@sanjuhs123 oh, thank you, I'll try for sure.

atp's profile picture
atp11 months ago

cool af but using a non-standard ascii char in the extension is a bad move

Marco Franzon's profile picture
Marco Franzon11 months ago

I think I didn't get your point, can you explain me better?

atp's profile picture
atp11 months ago

I feel it could generate easily avoidable problems, like when you create a file from the terminal and usually don’t have quick access to those characters

Marco Franzon's profile picture
Marco Franzon11 months ago

oh I got it know. have you got some suggestion?

atp's profile picture
atp11 months ago

allowing variations like .ucad or .mcad sounds cool too, and so terminal users without Unicode support (if any exist) won’t suffer

Marco Franzon's profile picture
Marco Franzon11 months ago

thank you, I am a newbie on this field, so every new information is useful

atp's profile picture
atp11 months ago

bro... you dont seem newbie at all hahah you created an awesome project keep it up 💪

Marco Franzon's profile picture
Marco Franzon11 months ago

thank you very much! Appreciated!

Diego's profile picture
Diego11 months ago

Or you can design a Lego with a couple clicks in cad

Marco Franzon's profile picture
Marco Franzon11 months ago

You can, or you script your models

Lukas Süss's profile picture
Lukas Süss11 months ago

How does it compare to OpenSCAD? Is it also a pure / referentially transparent / side effect free language (culling out all the bugs that can stem from for this use-case unnecessary statefulness).

Marco Franzon's profile picture
Marco Franzon11 months ago

Never tried openscad

NotThatQ's profile picture
NotThatQ11 months ago

Sounds great, I'll test it as soon as I can. I used openSCAD and it was quite powefull but unfortunately the development stopped.

Marco Franzon's profile picture
Marco Franzon11 months ago

this is a newborn language, so let's see

Hervé Nivon's profile picture
Hervé Nivon11 months ago

Reminds me of OpenSCAD

Marco Franzon's profile picture
Marco Franzon11 months ago

I didn't know openscad

Hervé Nivon's profile picture
Hervé Nivon11 months ago

Well done 👍

Hervé Nivon's profile picture
Hervé Nivon11 months ago

Modeling 3d model has always been frightening to me. Use a mouse to sculpt a virtual blob 😱 I love so much being able to code 3d models. It’s mesmerizing to me. OpenSCAD revival 🥹

Marco Franzon's profile picture
Marco Franzon11 months ago

Time to play with 3D models.

Oliver's profile picture
Oliver11 months ago

can ai generate it

Marco Franzon's profile picture
Marco Franzon11 months ago

i think gemini 3 is able to generate them. I prefer this approach because I can have more control on the process in this way

Oliver's profile picture
Oliver11 months ago

generate the code

Marco Franzon's profile picture
Marco Franzon11 months ago

Exactly, that's the plan, integrate into the webeditor and llm so I can let it write the code

sara.sissy's profile picture
sara.sissy11 months ago

@OliverBarnum That's very good.👏🏻

Marco Franzon's profile picture
Marco Franzon11 months ago

@OliverBarnum Thanks! Hope it works!

Dan Advantage's profile picture
Dan Advantage11 months ago

totally ground-breaking, amazing work, marco!

Marco Franzon's profile picture
Marco Franzon11 months ago

It is pretty awesome! 3D printing goes brrrr

Dan Advantage's profile picture
Dan Advantage11 months ago

it's almost too easy

Marco Franzon's profile picture
Marco Franzon11 months ago

it's becoming just a funny game

Dan Advantage's profile picture
Dan Advantage11 months ago

the game of life

bake-chang's profile picture
bake-chang11 months ago

I once tried hooking OpenSCAD up to an LLM, and it just didn’t work at all.

Rodolfo Bonnin's profile picture
Rodolfo Bonnin11 months ago

Cadquery?

Marco Franzon's profile picture
Marco Franzon11 months ago

what is cadquery?

Rodolfo Bonnin's profile picture
Rodolfo Bonnin11 months ago

Similar, but a very stable Python library with kits of component libraries. Also check build123d

Marco Franzon's profile picture
Marco Franzon11 months ago

oh very interesting. Thanks for sharing

needabetteralt's profile picture
needabetteralt11 months ago

Literally math cad.

Marco Franzon's profile picture
Marco Franzon11 months ago

literally.

needabetteralt's profile picture
needabetteralt11 months ago

No, it specifically is. Mathcad or openscad is literally already this. It’s been around a long time.

Marco Franzon's profile picture
Marco Franzon11 months ago

Ya, I am not joking, I didn't know that. I discovered today here in the comments, many people talk about openscad

javacasm's profile picture
javacasm11 months ago

Love it, if you need a beta tester... just send a msg

Marco Franzon's profile picture
Marco Franzon11 months ago

thanks! I will share the web editor soon

Pewpy's profile picture
Pewpy11 months ago

openscad exists you know

Marco Franzon's profile picture
Marco Franzon11 months ago

@MrPewpyButWhole ya I received many comments about that

Pewpy's profile picture
Pewpy11 months ago

will you support the superior .step format? the .stl format is late 1980's and is very out of date

migero 🤌🥕🐇's profile picture
migero 🤌🥕🐇11 months ago

can any current AI LLM use it ?

Marco Franzon's profile picture
Marco Franzon11 months ago

I am doing exactly this. Like an agent to properly write this syntax on a given prompt

migero 🤌🥕🐇's profile picture
migero 🤌🥕🐇11 months ago

looking forward then

Marco Franzon's profile picture
Marco Franzon11 months ago

working on it, stay tuned!

Sunwolf's profile picture
Sunwolf11 months ago

Can it do animal figures? Like Huskies?

Marco Franzon's profile picture
Marco Franzon11 months ago

@GaryWA9 pretty complex task. I think we can try to make a very rough version of a husky. Let me try.

Sunwolf's profile picture
Sunwolf11 months ago

That would be cool. I'd love to find a way without 3D scanning gear. I have Huskies and wanted to make their own statues and they generally won't sit still for a scanner process. I was thinking 3-4 images from different angles could be crunched up but have no idea what AI would crunch that up or if it exists yet. I use FreeCAD and Blender for other things.

Marco Franzon's profile picture
Marco Franzon11 months ago

@GaryWA9 oh, very nice. I think you should try with gemini 3 maybe. Uploading the pictures and asking for a 3d model of them. I have seen something like this for cars and it looks pretty nice.

Sunwolf's profile picture
Sunwolf11 months ago

Will try...but then have to get to STL for the 3D Printer. Someone could make a business out of that, doing custom 3D statues for people's pets. Just spit balling. But that would be cool for my crew.

Marco Franzon's profile picture
Marco Franzon11 months ago

@GaryWA9 I am sure that it already exists but we just don't know XD

Sunwolf's profile picture
Sunwolf11 months ago

Web3 is vast.😎

TheRad-creator's profile picture
TheRad-creator11 months ago

Can you also choose color for the piece?

Marco Franzon's profile picture
Marco Franzon11 months ago

ya sure

TheRad-creator's profile picture
TheRad-creator11 months ago

Cool, thx.

Marco Franzon's profile picture
Marco Franzon11 months ago

soon online, stay tuned.

Lachlan Perrier's profile picture
Lachlan Perrier11 months ago

Fantastic

Marco Franzon's profile picture
Marco Franzon11 months ago

ya, it really is!

Shoopie toopie's profile picture
Shoopie toopie11 months ago

How am I supposed to find mu on my keyboard for the file extension good sir

Marco Franzon's profile picture
Marco Franzon11 months ago

I think that is a very good question. That is why it is better to use a fully integrated editor

Marco Franzon's profile picture
Marco Franzon11 months ago

@virtuaboii .microcad extension is better XD

Marco Franzon's profile picture
Marco Franzon11 months ago

@virtuaboii simple, clean, fast. Like it.

8kspaceinvader's profile picture
8kspaceinvader11 months ago

Ever tried OpenSCAD?

Marco Franzon's profile picture
Marco Franzon11 months ago

yep, i discovered it today

Daniel Kumlin's profile picture
Daniel Kumlin11 months ago

looks super sick. what is the coolest thing you have made with it?

Marco Franzon's profile picture
Marco Franzon11 months ago

lego

𝕬𝖑𝖕𝖍𝖆 𝕷𝖊𝖌𝖎𝖔𝖓 🕋's profile picture
𝕬𝖑𝖕𝖍𝖆 𝕷𝖊𝖌𝖎𝖔𝖓 🕋11 months ago

This is awesome. Being able to git diff cad designs. Text based git diffable engineering ftw.

Marco Franzon's profile picture
Marco Franzon11 months ago

EXACTLY. You got the point, that is the real value of this.

Peter Isza's profile picture
Peter Isza11 months ago

Cool where can I try it

Marco Franzon's profile picture
Marco Franzon11 months ago

the code is open source and you can install the software with cargo

Peter Isza's profile picture
Peter Isza11 months ago

One can make a static website for this thing with codemirror, webassembly, and webgpu right?

Marco Franzon's profile picture
Marco Franzon11 months ago

yep why not!

Peter Isza's profile picture
Peter Isza11 months ago

I am lazy, I will wait until someone else builds it

Marco Franzon's profile picture
Marco Franzon11 months ago

just a couple of hours and I am going to host the website

Dan Advantage's profile picture
Dan Advantage11 months ago

@fs9h7kh4b5 lol let's go marco

Marco Franzon's profile picture
Marco Franzon11 months ago

@fs9h7kh4b5 we are sooo back

Borz's profile picture
Borz11 months ago

cool.

Marco Franzon's profile picture
Marco Franzon11 months ago

It is.

SpaceBird Aero's profile picture
SpaceBird Aero11 months ago

Fusion 360 has had scripting for making objects through code from the starting...

Marco Franzon's profile picture
Marco Franzon11 months ago

Oh I didn't know🚀

Paula Gutierrez Cascales's profile picture
Paula Gutierrez Cascales11 months ago

the cursor for CAD implementations here could be incredible - generative design and representations here could be awesome

Marco Franzon's profile picture
Marco Franzon11 months ago

This is literally what I am doing right now.

3DCre8r's profile picture
3DCre8r11 months ago

Now do an icosahedron

Marco Franzon's profile picture
Marco Franzon11 months ago

Let's go

3DCre8r's profile picture
3DCre8r11 months ago

😅 First time I modeled one after seeing how to construct it with 3 orthogonal golden ratio rectangles like a month ago in an x post, maybe it was one of yours. Last week I started to try it with grasshopper in rhino but I was too clueless compared to how to do it far more simply in Solidworks which this is.

Marco Franzon's profile picture
Marco Franzon11 months ago

oh well, it looks really complex XD

3DCre8r's profile picture
3DCre8r11 months ago

It was a little annoying to make ha.

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