Reposted by Bruno LevySoulcié @soulcie.fr · 29/09/2026Dessin de juin 2024 pour @telerama.bsky.social 5931361
Reposted by Bruno LevyFlorence Dellerie @florencedellerie.bsky.social · 16/09/2026🎨 Ils ne sont pas "ternes" ! Ils sont uniques, bien camouflés, fascinants à observer et à dessiner. Les "papillons de nuit" sont des sujets que j'adore illustrer. RDV bientôt avec les Éditions Delachaux & Niestlé pour en découvrir davantage 👀 #SciArt #lépidoptères #entomologie 68313
Reposted by Bruno LevyBruno Bellamy @brunobellamy.bsky.social · 16/09/2026Le #puritanisme de certains rézosocios n'a de cesse de m'épater… Récit documenté d'une récente mésaventure avec #Meta : fr.tipeee.com/bruno-bellam... et, surtout, mes remerciements à tous les gens qui persistent à me soutenir ! :) #bellaminettes #censure #noAI #merci @tipeee.bsky.social 1105
Bruno Levy @brunolevy01.bsky.social · 15/09/2026Our article with F. Nikakhtar, R. K. Sheth, N. Padmanabhan and R. Mohayaee on Optimal Transport-based Early Universe Reconstruction accepted in Physical Review D! We demonstrate how our method works for a class of "local" primordial non-Gaussian fields. Preprint here: arxiv.org/abs/2606.01529arxiv.orgOptimal Transport Reconstruction of Biased Tracers in Primordial Non-Gaussian FieldsOptimal transport provides an efficient method to infer the displacement of objects by mapping their initial positions to their present-day locations over cosmic time; equivalently, it enables the rec... 020
Reposted by Bruno LevyMatthieu Chavent @matthchavent.bsky.social · 12/09/2026Almost 20 years ago, my first author article was about the Molecular Skin Surface under @brunolevy01.bsky.social supervision: www.sciencedirect.com/science/arti... Now, the Molecular Skin Surface is back in the webbrowser! 094
Bruno Levy @brunolevy01.bsky.social · 03/09/2026A fantastic day of preparation with Roya Mohayaee, Charles Dapogny and Edouard Oudet at Institut d'Astrophysique de Paris. Countdown will start shortly. Those who know know 😉. Wish us good luck ! 250
Bruno Levy @brunolevy01.bsky.social · 02/09/2026Vibe coding in #geogram: Claude and ChatGPT know it very well !! 020
Bruno Levy @brunolevy01.bsky.social · 01/09/2026#geogram just reached 2500 stars on github, And that's not all, version 1.10.1 was just released: github.com/BrunoLevy/ge... Geogram is in C++, but it also supports Python, Node.js, WebAssembly, TypeScript and Lua through Rosetta by Frantz Maerten, more on this here: github.com/rosetta-bind... 0156
Reposted by Bruno LevyChloé Woitier @chloew.bsky.social · 18/08/2026Merci le service public de se pencher sur le fléau des affiches faites par IA youtu.be/pIYJa0Hzvys?...youtu.beLes affiches faites par IA : un fléau graphique ?YouTube video by France Culture 511756
Reposted by Bruno LevyHiroki Sayama @hirokisayama.bsky.social · 18/08/2026I was busy chaining a session in the yesterday afternoon at #ALIFE2026 My favorite: Greg Turk showed an amazing extension of Langton's ants with memory ("Turmites", with Tur coming from Turing) They can draw Dragon curves and even perform JvN-style self-replication!! 🤯🐜 184
Bruno Levy @brunolevy01.bsky.social · 27/07/2026My son just participated to a game jam. With a friend they created this puzzle game in 4 days ! owomelete.itch.io/catterplosionowomelete.itch.ioCatterplosion by OwOmelete, wibixHelp Wiggle The Galaxy Swallower of Eternal Despair make his childrens become butterflys ! 152
Bruno Levy @brunolevy01.bsky.social · 23/07/2026Oops, I completely forgot to print my poster for the Q&A session after the SIGGRAPH presentation... Let us try to fix this... 2235
Bruno Levy @brunolevy01.bsky.social · 17/07/2026An effect of the heat wave in France ? No, getting ready with Cyprien Plateau-Holleville for our course at @acmsiggraph.bsky.social don't miss it ! Sunday, 9am to 12:15pm, room 408 B 0212
Bruno Levy @brunolevy01.bsky.social · 16/07/2026Packing my bags for ACM SIGGRAPH and rehearsing for: - Sunday the 19th - 9am to 12:15pm: course on fluid simulation and optimal transport with @pltc.bsky.social - Thursday the 23th - 10:45am to 12:35pm: Exact predicates and exact constructions for mesh CSG (TOG article) 0101
Bruno Levy @brunolevy01.bsky.social · 16/07/2026Super happy to give this course with @pltc.bsky.social next Sunday at #SIGGRAPH2026 ! 0121
Reposted by Bruno LevyHacker News 20 @betterhn20.e-work.xyz · 02/07/2026The gauge broke: devs felt 20% faster with AI, measured 19% slower intrepidkarthi.com/writing/the-gaug… (news.ycombinator.com/item?id=487574…)intrepidkarthi.comThe gauge broke · intrepidkarthiFor two years I argued the feeling of AI speed had come apart from the fact of it, from watching my own teams. This summer it stopped being an anecdote. A controlled trial measured experienced developers feeling about 20% faster while running about 19% slower. The instrument we steer by reads backward. 032
Bruno Levy @brunolevy01.bsky.social · 26/06/2026A week in Institut d'astrophysique de Paris with R. Mohayaee, A. Lukas and T. Rhys Harvey, on Calabi-Yau manifolds. BTW, this image is not a CY ! it is just a couple of cross-sections. Now working on 6D FEM to solve the complex Monge-Ampère equation. ... no body hears you scream in high-D space ! 080
Reposted by Bruno LevyGabriel Peyré @gabrielpeyre.bsky.social · 16/06/2026The alpha version of my new book "Optimal Transport for Machine Learners" is out, with in particular an online version with interactive figures www.gpeyre.com/ot4ml/ 09843
Reposted by Bruno LevyJacco Bikker 🎦 @jbikker.bsky.social · 03/06/2026Chris Hanson put the source code to the Amiga Juggler demo (1987, by Eric Graham) on GitHub. More info here: alphapixeldev.com/recovering-e... Repo: github.com/AlphaPixel/E...alphapixeldev.comRecovering Eric Graham's 1987 Amiga Juggler raytracer source code - AlphaPixel Software DevelopmentRecovering Eric Graham's 1987 Juggler raytracer source code AlphaPixel often gets involved with modernizing and updating old performance and graphics code. Sometimes that means client work under NDA. ... 26511
Bruno Levy @brunolevy01.bsky.social · 03/06/2026Still working on hashtag#geogram / geogram+ / Tessael boolean operations for meshes, Making them faster without sacrifying robustness and generality. More to come ... (this test suggested by Cyprien Plateau Holleville) 1171
Bruno Levy @brunolevy01.bsky.social · 28/05/2026geogram 1.10.0 is out ! github.com/BrunoLevy/ge... It is a programming library of geometric algorithms, used in Tessael's Geo2 (www.tessael.com) and NASA - National Aeronautics and Space Administration Launch, Ascent and Vehicle Aerodynamics (www.nas.nasa.gov/LAVA/) 1132
Reposted by Bruno LevyYosysHQ @yosyshq.com · 27/05/2026$1200 too much for a Vivado license? How about: $0 - Yosys $0 - nextpnr $0 - OpenROAD $30 -Subnautica 2 $30 - Blahaj $180 - Glasgow interface explorer from @crowdsupply.bsky.social $950 -160kum^2 of Sky130 silicon + ASIC from @tinytapeout.com #opensource #FPGA #ASIC 1207
Bruno Levy @brunolevy01.bsky.social · 22/05/2026Working with Cyprien Plateau-Holleville, Charles Dapogny, Edouard Oudet and Roya Mohayaee on shape optimization / partial optimal transport. A lot of work remains to do (in particular, Virtual Element method in 3D) Preprint (2D version) here: arxiv.org/abs/2409.07873 1111
Bruno Levy @brunolevy01.bsky.social · 15/05/2026Working on Scalable Optimal Transport with R. Mohayaee, C. Dapogny and E. Oudet: more than 1 billion particles ! ➡️ use algebraic multigrid preconditioner (AMGCL) ➡️ rewrite GPU backend: no limit on matrix size, supports multi-GPU ! ➡️ Available in OpenNL: github.com/BrunoLevy/Op... 1114
Reposted by Bruno LevyChloé Woitier @chloew.bsky.social · 15/05/2026IA : qui est Cerebras, ce rival de Nvidia qui a réalisé la plus grosse introduction en Bourse de l’année ? www.lefigaro.fr/secteur/high...lefigaro.frIA : qui est Cerebras, ce rival de Nvidia qui a réalisé la plus grosse introduction en Bourse de l’année ?DÉCRYPTAGE - Ce concepteur américain de puces IA a secoué le Nasdaq jeudi et vaut désormais plus de 80 milliards de dollars. Il a su se positionner sur un créneau qui s’est avéré porteur. 121
Reposted by Bruno LevyChloé Woitier @chloew.bsky.social · 14/05/2026😱 J'ai fait un podcast 😱 Ou plus exactement j'ai été invitée dans l'émission Twitch "Stonks" de Arthur Perticoz pour parler en détail de la crise qui secoue le monde du jeu vidéo, avec un focus sur Ubisoft et Nacon mais pas que ! Ca dure 1h45, bonne écoute ! open.spotify.com/episode/7m8P...open.spotify.comPourquoi l'industrie du jeu vidéo est en danger - Hors-série avec Chloé WoitierSpotify video 6467
Reposted by Bruno LevyFlux @willflux.bsky.social · 09/05/2026Have you upgraded your @yosyshq.com yosys recently? #FPGA 0.49 (Jan 2025): TRELLIS_COMB: 4357 0.64 (May 2026): TRELLIS_COMB: 3682 15% LUT saving with no change in my Verilog design. 👏 293
Bruno Levy @brunolevy01.bsky.social · 13/05/2026Plouf ! Our @eurographicsc.bsky.social course notes on Optimal Transport for Fluids, New and Old, with @pltc.bsky.social are out, here: diglib.eg.org/items/68a801... 1209
Bruno Levy @brunolevy01.bsky.social · 12/05/2026All lights green: #geogram works fine with Visual C++ 2026 (and all modern compilers) 040
Bruno Levy @brunolevy01.bsky.social · 12/05/2026New results: adventures in redshift space, with Roya Mohayaee, Charles Dapogny and Edouard Oudet What's that ? Millenium falcon going to hyperspace ? No, redshift distortions: uncertainties on galaxy clusters positions due to their relative motions. Our new algo. gives encouraging results in 2D 290
Bruno Levy @brunolevy01.bsky.social · 11/05/2026Playing with geogram+ from Tessael. I want robust and accurate boolean operations / CSG with meshes I also want them to run fast Why should I choose ? Tessael developed geogram+, an enhanced version of geogram. Playing with it in Python, in Polyscope, using Tessael's "ALLOY" interop middleware. 0191
Bruno Levy @brunolevy01.bsky.social · 10/05/2026Back from Eurographics Conference, seen many great talks there, and more importantly, seen many friends! Amir Vaxman, Jos Stam,Michela Spagnuolo, George Drettakis, Lourdes Agapito, Mark Alexa, Anatole Lécuyer, Raphaëlle Chaine, Shimin Hu, Leif Kobbelt and many others ! Next stop, SIGGRAPH 2026 ! 0140
Bruno Levy @brunolevy01.bsky.social · 03/05/2026Packing my luggage for Eurographics Conference and fixing some last minute details for our course with Cyprien Plateau-Holleville on fluid simulation with Optimal Transport, Monday afternoon. See you there ! 0130
Bruno Levy @brunolevy01.bsky.social · 01/05/2026Fun with semi-discrete Optimal Transport (getting ready for our course at Eurographics Conference next Monday and ACM SIGGRAPH in July with Cyprien Plateau-Holleville) 0203
Reposted by Bruno LevyMatthieu Schaller @mschaller.bsky.social · 28/04/2026Happy to eventually release this very large dataset of cosmological simulations, including the largest run ever done. Was all fun to do with the @swiftsimulation.bsky.social code, now for everyone to play freely with the data! 052
Bruno Levy @brunolevy01.bsky.social · 28/04/2026Preparing for our course "Optimal Transport Based fluid simulation: New and Old" with Cyprien Plateau-Holleville (EUROGRAPHICS and SIGGRAPH) 2D simulation of "droplet hurdles race" (De Maleprade et.al). Features high surface tension, viscosity and fluid boundary - domain interactions. 1286
Bruno Levy @brunolevy01.bsky.social · 27/04/2026Thrilled ! My GEOGRAM software library is used by NASA AMES center, in their Launch & Ascent Vehicle Aerodynamics software. GEOGRAM is used in their Voronoi meshing component. - www.nas.nasa.gov/LAVA - ntrs.nasa.gov/api/citation... - www.nas.nasa.gov/LAVA/print_p... 2352
Reposted by Bruno LevyHacker News 20 @betterhn20.e-work.xyz · 25/04/2026Hokusai and Tesselations dl.ndl.go.jp/pid/1899550/1/11 (news.ycombinator.com/item?id=479029…)dl.ndl.go.jpHokusai and Tesselations 011
Bruno Levy @brunolevy01.bsky.social · 22/04/2026We will give with Cyprien Plateau-Holleville a course on Fluid Simulation with Optimal Transport: New and Old at: - Eurographics 2026 (May 4-8, Aachen) - SIGGRAPH 2026 (July 19-23, LA) Featuring: - Gentle introduction to OT - Create your own OT at home - Fluid sim with OT See you there ! 1226
Bruno Levy @brunolevy01.bsky.social · 13/04/2026Participating to the 30 years anniversary of CGAL !! 🤩 It will be the occasion to meet friends, discuss about geometric algorithms, and discuss about strategies for developing and maintaining Open-Source software over decades. Looking forward to see you there ! www.cgal.org/2026/04/07/O... 0200
Bruno Levy @brunolevy01.bsky.social · 10/04/2026"In search of optimal transportation", A nice article about our ParMA team: www.inria.fr/en/transport... 060
Bruno Levy @brunolevy01.bsky.social · 08/04/2026Ooh, #geogram 1.9.9 is out ! What's geogram ? What, you don't know already ? What are you waiting for ? Take a look here ⤵️ github.com/BrunoLevy/ge... 092
Bruno Levy @brunolevy01.bsky.social · 07/04/2026On my was for a meeting at Institut d'astrophysique de Paris on Optimal Transport and Physics with Roya Mohayaee, Christian Leonard, Yann Brenier, Jesse Thaler and Ghambhir Rikab. 090
Bruno Levy @brunolevy01.bsky.social · 30/03/2026On the train back from @acmsiggraph.bsky.social IPC, fighting jetlag: programming is a good way to stay awake. New Dear Imgui bindings for Lua (Graphite seems to still work) 314 functions (+ 52 imdrawlist functions) github.com/BrunoLevy/im... 1110
Bruno Levy @brunolevy01.bsky.social · 30/03/2026The ACM SIGGRAPH TPC meeting is a unique occasion to see friends and stars of computer graphics research ! Now flying back to france after two busy days of paper selection and discussions plus a workshop with flash talks on hot topics. Justin Solomon Miri Ben-Chen thank you for the fantastic work! 040
Bruno Levy @brunolevy01.bsky.social · 29/03/2026Lua bindings for @ocornut.bsky.social's dear imgui were unmaintained / incompatible with new versions. So I forked and rewrote them, here: github.com/BrunoLevy/im...github.comGitHub - BrunoLevy/imgui_lua_bindings_gomgen: Function bindings for ImGui in luaFunction bindings for ImGui in lua. Contribute to BrunoLevy/imgui_lua_bindings_gomgen development by creating an account on GitHub. 1102
Reposted by Bruno LevyFreya Holmér @freya.bsky.social · 26/03/2026I'm almost there it's so pretty!! 😭 this is the first time I've made extensive use of complex numbers in shader code, which has been fun! it's an analytic 2D lighting system through piecewise conformal maps representing angular light/"sky" exposure, which means you get fully analytic penumbras! 672064169