Bruno Levy
@brunolevy01.bsky.social
Researcher in computational physics,,
Scientific director of Program Inria Quadrant
2018-2022 director of Inria Nancy G-Est,
ERC GOODSHAPE-VORPALINE,
#riscv ambassador
Scientific director of Program Inria Quadrant
2018-2022 director of Inria Nancy G-Est,
ERC GOODSHAPE-VORPALINE,
#riscv ambassador
February 10, 2026 at 8:28 PM
Working on Graphite/Geogram, improved the GUI, reorganized in a tree (leaves much more space for the 3D view). Will be released soon. For the curious, the repo is up to date here: github.com/BrunoLevy/Gr...
Image: OpenSCAD test suite (displayed in a retro-futurist style for fun...)
Image: OpenSCAD test suite (displayed in a retro-futurist style for fun...)
February 8, 2026 at 8:35 AM
Working on Graphite/Geogram, improved the GUI, reorganized in a tree (leaves much more space for the 3D view). Will be released soon. For the curious, the repo is up to date here: github.com/BrunoLevy/Gr...
Image: OpenSCAD test suite (displayed in a retro-futurist style for fun...)
Image: OpenSCAD test suite (displayed in a retro-futurist style for fun...)
It's time to visit an old friend ...
There were signs
- A nice Luxo lego under the tree
- This year's TOG paper, a nice story to tell;
- Embarked the TPC with Miri Ben-Chen and @justinmsolomon.bsky.social;
- My daughter came with my old T-Shirt
ACM SIGGRAPH, happy to see you again !
#siggraph2026
There were signs
- A nice Luxo lego under the tree
- This year's TOG paper, a nice story to tell;
- Embarked the TPC with Miri Ben-Chen and @justinmsolomon.bsky.social;
- My daughter came with my old T-Shirt
ACM SIGGRAPH, happy to see you again !
#siggraph2026
January 27, 2026 at 10:43 PM
It's time to visit an old friend ...
There were signs
- A nice Luxo lego under the tree
- This year's TOG paper, a nice story to tell;
- Embarked the TPC with Miri Ben-Chen and @justinmsolomon.bsky.social;
- My daughter came with my old T-Shirt
ACM SIGGRAPH, happy to see you again !
#siggraph2026
There were signs
- A nice Luxo lego under the tree
- This year's TOG paper, a nice story to tell;
- Embarked the TPC with Miri Ben-Chen and @justinmsolomon.bsky.social;
- My daughter came with my old T-Shirt
ACM SIGGRAPH, happy to see you again !
#siggraph2026
Reposted by Bruno Levy
Taille colossale, budget imposant, collaboration internationale étendue… Ces cinq infrastructures dédiées à la physique poursuivent des objectifs scientifiques à la mesure de leur gigantisme : pas moins que des révolutions.
Infrastructures de recherche (2) : 5 sites hors norme
lejournal.cnrs.fr
January 21, 2026 at 8:47 AM
Taille colossale, budget imposant, collaboration internationale étendue… Ces cinq infrastructures dédiées à la physique poursuivent des objectifs scientifiques à la mesure de leur gigantisme : pas moins que des révolutions.
Enjoyed yesterday's "menger sponge" example computed by hashtag#geogram and Tessael's geogram+ ? Let's see a more interesting example: a nice plane engine that Cyprien found on grabcad. Can we apply boolean operations to such a complex mesh ? Yes !!
January 19, 2026 at 1:17 PM
Enjoyed yesterday's "menger sponge" example computed by hashtag#geogram and Tessael's geogram+ ? Let's see a more interesting example: a nice plane engine that Cyprien found on grabcad. Can we apply boolean operations to such a complex mesh ? Yes !!
A good crash-test for #geogram: level-5 Menger sponge
100K facets have intersections, and some of them more than 1K intersections in same facet.
Final mesh: 1.4M vertices and 3.8M faces,
CSG engine and geogram+ arithmetic kernel marketed by Tessael go brrr !!!
github.com/BrunoLevy/ge...
100K facets have intersections, and some of them more than 1K intersections in same facet.
Final mesh: 1.4M vertices and 3.8M faces,
CSG engine and geogram+ arithmetic kernel marketed by Tessael go brrr !!!
github.com/BrunoLevy/ge...
January 18, 2026 at 6:19 PM
A good crash-test for #geogram: level-5 Menger sponge
100K facets have intersections, and some of them more than 1K intersections in same facet.
Final mesh: 1.4M vertices and 3.8M faces,
CSG engine and geogram+ arithmetic kernel marketed by Tessael go brrr !!!
github.com/BrunoLevy/ge...
100K facets have intersections, and some of them more than 1K intersections in same facet.
Final mesh: 1.4M vertices and 3.8M faces,
CSG engine and geogram+ arithmetic kernel marketed by Tessael go brrr !!!
github.com/BrunoLevy/ge...
Reposted by Bruno Levy
Who's the saying Hello? The 🏝️ Isle RISC-V CPU. #FPGA
Over the weekend I'll be working on the next chapter, introducing a RISC-V CPU, connecting it to our hardware, and writing our first software.
Over the weekend I'll be working on the next chapter, introducing a RISC-V CPU, connecting it to our hardware, and writing our first software.
January 15, 2026 at 12:05 PM
Who's the saying Hello? The 🏝️ Isle RISC-V CPU. #FPGA
Over the weekend I'll be working on the next chapter, introducing a RISC-V CPU, connecting it to our hardware, and writing our first software.
Over the weekend I'll be working on the next chapter, introducing a RISC-V CPU, connecting it to our hardware, and writing our first software.
Reposted by Bruno Levy
Je vous conseille l'intervention (à partir de 1h03) du directeur de l'école Méliès, ça parle de comment les écoles d'animation peuvent contrer la destruction de savoirs faire liés à IA générative en revenant aux bases de l'anatomie, du mouvement et de la composition d'image - sans logiciels.
La Commission Culture du Sénat s'est penché sur la crise que traverse le secteur de l'animation en France, 2h d'audition de professionnels de cette industrie
youtu.be/OB5JR5fE_Ss?...
youtu.be/OB5JR5fE_Ss?...
Animation : les difficultés d’une filière d’excellence
YouTube video by Sénat
youtu.be
January 10, 2026 at 9:19 AM
Je vous conseille l'intervention (à partir de 1h03) du directeur de l'école Méliès, ça parle de comment les écoles d'animation peuvent contrer la destruction de savoirs faire liés à IA générative en revenant aux bases de l'anatomie, du mouvement et de la composition d'image - sans logiciels.
Geogram flies !
The other day, I was reading this article from NASA Ames Research Center:
ntrs.nasa.gov/api/citation...
What do they use for the geometric computations ?
Geogram of course ! (thrilled !!)
Geogram is a library with geometry processing algorithm:
github.com/BrunoLevy/ge...
The other day, I was reading this article from NASA Ames Research Center:
ntrs.nasa.gov/api/citation...
What do they use for the geometric computations ?
Geogram of course ! (thrilled !!)
Geogram is a library with geometry processing algorithm:
github.com/BrunoLevy/ge...
January 6, 2026 at 8:46 PM
Geogram flies !
The other day, I was reading this article from NASA Ames Research Center:
ntrs.nasa.gov/api/citation...
What do they use for the geometric computations ?
Geogram of course ! (thrilled !!)
Geogram is a library with geometry processing algorithm:
github.com/BrunoLevy/ge...
The other day, I was reading this article from NASA Ames Research Center:
ntrs.nasa.gov/api/citation...
What do they use for the geometric computations ?
Geogram of course ! (thrilled !!)
Geogram is a library with geometry processing algorithm:
github.com/BrunoLevy/ge...
Smart use of AI !
January 4, 2026 at 4:58 PM
Smart use of AI !
Reposted by Bruno Levy
Stewart Cheifet, creator of The Computer Chronicles, dead at 87 https://obits.goldsteinsfuneral.com/stewart-cheifet (https://news.ycombinator.com/item?id=46446359)
Stewart Cheifet Obituary December 28, 2025 - Goldsteins Funeral
View Stewart Cheifet's obituary, find service dates, and sign the guestbook.
obits.goldsteinsfuneral.com
December 31, 2025 at 6:56 PM
Stewart Cheifet, creator of The Computer Chronicles, dead at 87 https://obits.goldsteinsfuneral.com/stewart-cheifet (https://news.ycombinator.com/item?id=46446359)
Reposted by Bruno Levy
Why C++ programmers keep growing fast despite competition, safety, and AI https://herbsutter.com/2025/12/30/software-taketh-away-faster-than-hardware-giveth-why-c-programmers-keep-growing-fast-despite-competition-safety-and-ai/ (https://news.ycombinator.com/item?id=46442015)
Software taketh away faster than hardware giveth: Why C++ programmers keep growing fast despite competition, safety, and AI
2025 was another great year for C++. It shows in the numbers Before we dive into the data below, let’s put the most important question up front: Why have C++ and Rust been the fastest-growing major…
herbsutter.com
December 31, 2025 at 2:17 PM
Why C++ programmers keep growing fast despite competition, safety, and AI https://herbsutter.com/2025/12/30/software-taketh-away-faster-than-hardware-giveth-why-c-programmers-keep-growing-fast-despite-competition-safety-and-ai/ (https://news.ycombinator.com/item?id=46442015)
What is this new trend
of writing posts on
social media
formatted in tiny
paragraphs ?
Are generative AI systems
degenerating ?
will they then
produce content
token
by token ?
Then character by
c
h
a
r
a
c
t
e
r
?
1011
01010
0
0
00000000
Aahhh, finally, the end of all this non-sense !!!
of writing posts on
social media
formatted in tiny
paragraphs ?
Are generative AI systems
degenerating ?
will they then
produce content
token
by token ?
Then character by
c
h
a
r
a
c
t
e
r
?
1011
01010
0
0
00000000
Aahhh, finally, the end of all this non-sense !!!
December 31, 2025 at 12:17 PM
What is this new trend
of writing posts on
social media
formatted in tiny
paragraphs ?
Are generative AI systems
degenerating ?
will they then
produce content
token
by token ?
Then character by
c
h
a
r
a
c
t
e
r
?
1011
01010
0
0
00000000
Aahhh, finally, the end of all this non-sense !!!
of writing posts on
social media
formatted in tiny
paragraphs ?
Are generative AI systems
degenerating ?
will they then
produce content
token
by token ?
Then character by
c
h
a
r
a
c
t
e
r
?
1011
01010
0
0
00000000
Aahhh, finally, the end of all this non-sense !!!
Geogram 1.9.8 is out !
github.com/BrunoLevy/ge...
Geogram is a programming library with geometric algorithm.
it has mesh repair, mesh simplification, mesh intersection, Delaunay triangulation, exact predicates and much more !
github.com/BrunoLevy/ge...
Geogram is a programming library with geometric algorithm.
it has mesh repair, mesh simplification, mesh intersection, Delaunay triangulation, exact predicates and much more !
December 28, 2025 at 3:49 PM
Geogram 1.9.8 is out !
github.com/BrunoLevy/ge...
Geogram is a programming library with geometric algorithm.
it has mesh repair, mesh simplification, mesh intersection, Delaunay triangulation, exact predicates and much more !
github.com/BrunoLevy/ge...
Geogram is a programming library with geometric algorithm.
it has mesh repair, mesh simplification, mesh intersection, Delaunay triangulation, exact predicates and much more !
Found under the christmass tree, very nice lego set for a computer graphic programmer 😉. Customized it a bit with a powerful LED.
December 27, 2025 at 10:47 PM
Found under the christmass tree, very nice lego set for a computer graphic programmer 😉. Customized it a bit with a powerful LED.
Reposted by Bruno Levy
Reposted by Bruno Levy
1
To predict the behaviour of a primate, would you rather base your guess on a closely related species or one with a similar brain shape? We looked at brains & behaviours of 70 species, you’ll be surprised!
🧵Thread on our new preprint with @r3rt0.bsky.social , doi.org/10.1101/2025...
To predict the behaviour of a primate, would you rather base your guess on a closely related species or one with a similar brain shape? We looked at brains & behaviours of 70 species, you’ll be surprised!
🧵Thread on our new preprint with @r3rt0.bsky.social , doi.org/10.1101/2025...
July 27, 2025 at 5:26 PM
1
To predict the behaviour of a primate, would you rather base your guess on a closely related species or one with a similar brain shape? We looked at brains & behaviours of 70 species, you’ll be surprised!
🧵Thread on our new preprint with @r3rt0.bsky.social , doi.org/10.1101/2025...
To predict the behaviour of a primate, would you rather base your guess on a closely related species or one with a similar brain shape? We looked at brains & behaviours of 70 species, you’ll be surprised!
🧵Thread on our new preprint with @r3rt0.bsky.social , doi.org/10.1101/2025...
Reposted by Bruno Levy
Pure Silicon Demo Coding: No CPU, No Memory, Just 4k Gates https://www.a1k0n.net/2025/12/19/tiny-tapeout-demo.html (https://news.ycombinator.com/item?id=46337438)
Pure Silicon Demo Coding: No CPU, No Memory, Just 4k Gates
www.a1k0n.net
December 20, 2025 at 5:36 PM
Pure Silicon Demo Coding: No CPU, No Memory, Just 4k Gates https://www.a1k0n.net/2025/12/19/tiny-tapeout-demo.html (https://news.ycombinator.com/item?id=46337438)
[Leaving X] .... DONE
Goodby to my 10000 followers, so long X, and thanks for the fish !
My stream of computational physics news / hardware engineering / geek stuff will continue here:
- www.linkedin.com/in/blevy/
- fosstodon.org/@BrunoLevy01
- bsky.app/profile/brun...
Goodby to my 10000 followers, so long X, and thanks for the fish !
My stream of computational physics news / hardware engineering / geek stuff will continue here:
- www.linkedin.com/in/blevy/
- fosstodon.org/@BrunoLevy01
- bsky.app/profile/brun...
December 15, 2025 at 8:35 AM
[Leaving X] .... DONE
Goodby to my 10000 followers, so long X, and thanks for the fish !
My stream of computational physics news / hardware engineering / geek stuff will continue here:
- www.linkedin.com/in/blevy/
- fosstodon.org/@BrunoLevy01
- bsky.app/profile/brun...
Goodby to my 10000 followers, so long X, and thanks for the fish !
My stream of computational physics news / hardware engineering / geek stuff will continue here:
- www.linkedin.com/in/blevy/
- fosstodon.org/@BrunoLevy01
- bsky.app/profile/brun...
Giving a presentation of our work on Lagrangian topological optimization with Charles Dapogny and Edouard Oudet at the Inria-LJLL seminar:
project.inria.fr/rencontreslj...
preprint here: arxiv.org/abs/2409.07873
project.inria.fr/rencontreslj...
preprint here: arxiv.org/abs/2409.07873
December 15, 2025 at 8:08 AM
Giving a presentation of our work on Lagrangian topological optimization with Charles Dapogny and Edouard Oudet at the Inria-LJLL seminar:
project.inria.fr/rencontreslj...
preprint here: arxiv.org/abs/2409.07873
project.inria.fr/rencontreslj...
preprint here: arxiv.org/abs/2409.07873
This chip is special,
(tinytapeout.com/chips/ttsky2...)
- it has designs made by hobbyists
- it has two #FemtoRV designs in it !!
FemtoRV is a super simple RiscV processor that we designed with Matthias Koch because we were boring during COVID...):
github.com/BrunoLevy/le...
(tinytapeout.com/chips/ttsky2...)
- it has designs made by hobbyists
- it has two #FemtoRV designs in it !!
FemtoRV is a super simple RiscV processor that we designed with Matthias Koch because we were boring during COVID...):
github.com/BrunoLevy/le...
December 15, 2025 at 7:48 AM
This chip is special,
(tinytapeout.com/chips/ttsky2...)
- it has designs made by hobbyists
- it has two #FemtoRV designs in it !!
FemtoRV is a super simple RiscV processor that we designed with Matthias Koch because we were boring during COVID...):
github.com/BrunoLevy/le...
(tinytapeout.com/chips/ttsky2...)
- it has designs made by hobbyists
- it has two #FemtoRV designs in it !!
FemtoRV is a super simple RiscV processor that we designed with Matthias Koch because we were boring during COVID...):
github.com/BrunoLevy/le...
Reposted by Bruno Levy
There is also Phong Tessellation in this family, which is meant to have nicer continuity properties: perso.telecom-paristech.fr/boubek/paper...
Phong Tessellation
Markerless Garment Capture
perso.telecom-paristech.fr
November 26, 2025 at 6:45 PM
There is also Phong Tessellation in this family, which is meant to have nicer continuity properties: perso.telecom-paristech.fr/boubek/paper...
AI, AI, AI everywhere, but I prefer...
... a more elegant weapon of a civilized age !
... a more elegant weapon of a civilized age !
November 10, 2025 at 9:01 PM
AI, AI, AI everywhere, but I prefer...
... a more elegant weapon of a civilized age !
... a more elegant weapon of a civilized age !
You are doing geometry processing, you need precision, performance, and easy compilation on Linux/Mac/Windows ?
My fork of the mini-gmp lib is available here:
github.com/BrunoLevy/mi...
Use it wisely ! (with great power comes great responsibilities...)
Image credit: Ed Sheeran
My fork of the mini-gmp lib is available here:
github.com/BrunoLevy/mi...
Use it wisely ! (with great power comes great responsibilities...)
Image credit: Ed Sheeran
November 10, 2025 at 3:35 PM
You are doing geometry processing, you need precision, performance, and easy compilation on Linux/Mac/Windows ?
My fork of the mini-gmp lib is available here:
github.com/BrunoLevy/mi...
Use it wisely ! (with great power comes great responsibilities...)
Image credit: Ed Sheeran
My fork of the mini-gmp lib is available here:
github.com/BrunoLevy/mi...
Use it wisely ! (with great power comes great responsibilities...)
Image credit: Ed Sheeran