Author | Lightnews

Emmett Lalish @elalish.bsky.social · 23d

Yes, self intersection is the key. I would argue that with rounded input geometry, there's no consistent way to even verify if something is self intersecting or not. Therefore manifold is instead robust to self intersection, and focuses on generating what we term epsilon-valid geometry.

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Emmett Lalish @elalish.bsky.social · 24d

All these issues are why we took a different approach with manifold. It's all basic floating point math, but structured in such a way to be manifold by construction. Once consistency is guaranteed, rounding error isn't such a problem.

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Emmett Lalish @elalish.bsky.social · Jul 15

#Manifold v3.2 is out, with various fixes and performance improvements. But most exciting, Manifold is now part of
@blender.org 4.5, and we even topped the release recap!
youtube.com/clip/Ugkxb-c...

YouTube

Share your videos with friends, family, and the world

youtube.com

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Emmett Lalish @elalish.bsky.social · May 18

#Manifold v3.1 is out! We now have a proper performance suite following EMBER's example, and have *doubled* our performance over v3.0.

Also lots of improvements on decimation, properties, faces, and more: github.com/elalish/mani...

Violin plot of mesh Boolean timing for different numbers of threads.

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Emmett Lalish @elalish.bsky.social · Dec 20

1.0K ⭐️ Thank you! 🙏
And loving that exponential look!
star-history.com#elalish/mani...

#starhistory #GitHub #OpenSource

Github star history graph of manifold - exponential!

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Emmett Lalish @elalish.bsky.social · Nov 30

Oh? What do you prefer for JS library distribution?

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Emmett Lalish @elalish.bsky.social · Nov 29

Wow, @godotengine.org just integrated my #Manifold library! A lot of work on both sides to make this happen, and real proof of how production-ready our library has become. github.com/godotengine/...

Fix mesh corruption of CSG by using elalish/manifold by fire · Pull Request #94321 · godotengine/godot

Fixes: godotengine/godot-proposals#9711 Fixes: elalish/manifold#91 The goal is to supersede #91748. Work was done as part of the V-Sekai development community, which is focused on providing social ...

github.com

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Emmett Lalish @elalish.bsky.social · Nov 25

Thanks! Would you like to add me to this list too? Manifold is my open source library: github.com/elalish/mani...

GitHub - elalish/manifold: Geometry library for topological robustness

Geometry library for topological robustness. Contribute to elalish/manifold development by creating an account on GitHub.

github.com

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Emmett Lalish @elalish.bsky.social · Nov 25

If you like CGAL, have you tried Manifold? github.com/elalish/mani...

www.google.com

Emmett Lalish @elalish.bsky.social · Nov 22

Excellent, it's great to hear our API is working as intended! Want to throw up a PR adding Valence to our list of users on our readme?

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Emmett Lalish @elalish.bsky.social · Nov 21

Dang, looks like that stack of printer paper saved him!

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Emmett Lalish @elalish.bsky.social · Nov 18

#Manifold v3.0 is out! This is a huge release - we have removed *all* required dependencies.

Our npm package is half the size and twice the speed. Our #SDF LevelSet is much faster and higher quality.
And so much more: github.com/elalish/mani...

A Gyroid model generated by Manifold's SDF LevelSet function.

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Emmett Lalish @elalish.bsky.social · Oct 24

v4.0 is out! Release notes: github.com/google/model...

We've updated our default tone mapping to Khronos PBR Neutral for vibrant and precise colors. We've also added a headset #AR mode you can try on e.g. #Quest3:

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Emmett Lalish @elalish.bsky.social · Apr 16

By the way, @bksy.bsky.social you really need to work on your image auto-cropping. In the preview of the link card, it seems to take a very narrow, vertically-centered strip of the image (pro tip: the important part of an image is toward the top). Then the real card expands it toward the bottom???

Emmett Lalish @elalish.bsky.social · Apr 16

How can we teach the world to be #software #literate? My ideas for reforming #education and #MOOCs for the masses:

Teaching Software Engineering

7 minute read. I firmly believe that in the near future, the ability to read and write code will be viewed as a component of basic literacy....

elalish.blogspot.com

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Emmett Lalish @elalish.bsky.social · Mar 26

I wrote a post on #research, #patents, and #startup advice: a skeptic's perspective.

Crusher of Dreams

7 minute read. I

elalish.blogspot.com

Emmett Lalish @elalish.bsky.social · Mar 5

Manifold v2.4 is out!

We added RefineToLength(), and you can now share your ManifoldCAD.org projects! Remix the model from the video here: tinyurl.com/243mjxr9

A colored, fluted shape made with ManifoldCAD.org

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Emmett Lalish @elalish.bsky.social · Feb 14

What can we learn about free will from the development of machine learning and AI?

Machine Learning and the Brain

4 minute read. Simplicity can generate vast complexity - the Mandelbrot fractal is a wonderful example. Iterating one tiny equation leads t...

elalish.blogspot.com

Emmett Lalish @elalish.bsky.social · Nov 21

Out of curiosity, how concerned are *you* about AI taking over the world? I think the fears are mostly projection.

Thank you for your informative wit - I've been reading your column since the Dealbreaker days, and though my day job is engineering, I am also trying to write more prose.

AI apocalypse?

5 minute read. My previous post on Machine Learning / Artificial Intelligence might have come across as a bit foreboding, but I actually fi...

elalish.blogspot.com

Emmett Lalish @elalish.bsky.social · Nov 15

Are you worried about #AI taking over the world? I'm not:

AI apocalypse?

5 minute read. My previous post on Machine Learning / Artificial Intelligence might have come across as a bit foreboding, but I actually fi...

elalish.blogspot.com

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Emmett Lalish @elalish.bsky.social · Nov 3

Manifold v2.2 is out - my free 3D geometry library.

Huge release with lots of fixes now that we have significant usage - thanks for the bug reports! We now have a whole 2D subsystem, a new glTF extension for lossless roundtrip, and we've even published Python bindings to PyPI.

Release notes:

Release v2.2.1 · elalish/manifold

This is another significant update, bringing 2D support, lossless roundtrip of Manifolds through glTF, Python bindings published on PyPI, and a whole new triangulator that fixes lots of geometric e...

github.com

Emmett Lalish @elalish.bsky.social · Sep 26

Does anyone else feel like debates about what #conciousness is are pointless? I wrote a very short blog post:
elalish.blogspot.com/2023/09/the-...

The Egotism of Consciousness

2 minute read. We used to say humans were the only conscious beings, so it didn't matter how we treated animals. In fact we even labeled man...

elalish.blogspot.com

Emmett Lalish @elalish.bsky.social · Sep 18

Also interesting that their model is not at all optimized for Web delivery. This is largely independent of format, but it goes to show the state of knowledge and tooling in this area is pretty poor if even apple can't manage it. We need to make this easier...

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Emmett Lalish @elalish.bsky.social · Aug 24

Ah, how fickle fame is! Here's an old post about the closest I ever came. #thingiverse, #3Dprint
elalish.blogspot.com/2021/01/inte...

Internet Fame

My boss and I had a career conversation where he asked about what motivates me. I realized it’s not really money, as I’m already so far bey...

elalish.blogspot.com

Emmett Lalish @elalish.bsky.social · Aug 22

I like to write, both prose and software. If you'd like to get to know me, my blog is a decent place to start. Here's an early post of the treehouse I made for my kids. elalish.blogspot.com/2020/07/tens...

Tensegrity Treehouse

When we bought our house, I had decided already that the huge, twin-trunk pine tree overhanging our sidewalk desperately needed a treehouse...

elalish.blogspot.com

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