2026-10-13T19:55:58Z https://nostr.now Bruno Levy https://nostr.now/npub1732m6x0mdat2xglrf0p943arzwnm9s65lyv7uz354naz68y5kcwq40sg3p https://cdn.fosstodon.org/accounts/avatars/109/539/843/684/223/254/original/d1bfba4a773d5df8.jpg https://cdn.fosstodon.org/accounts/avatars/109/539/843/684/223/254/original/d1bfba4a773d5df8.jpg https://nostr.now/nevent1qqs8w3rxnwgum8x9ay03q5rk2252g7akttjva09anpv65l0yrnk2mzgzyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcdv0say An effect of the heat wave in France ? <br/>No, getting ready with Cyprien Plateau-Holleville for our course at ACM SIGGRAPH, don&#39;t miss it !<br/>Sunday, 9am to 12:15pm, room 408 B<br/><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://cdn.fosstodon.org/media_attachments/files/116/936/355/262/477/200/original/cd04db24c62b9e65.mp4"></video> 2026-07-17T16:53:29Z https://nostr.now/nevent1qqs0zy24m0qprjnpaverw3lttrqty4welmd436vjtu2j9rjf0v3sgqszyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcelq6s7 Still working on hashtag#geogram / geogram+ / Tessael boolean operations for meshes,<br/>Making them faster without sacrifying robustness and generality.<br/>More to come ...<br/>(this test suggested by Cyprien Plateau Holleville)<br/><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://cdn.fosstodon.org/media_attachments/files/116/684/185/394/637/295/original/192626a2944ef118.mp4"></video> 2026-06-03T04:03:26Z https://nostr.now/nevent1qqsfedkmxx0z2pqmtxydcxa5eesr5az6ve68gyv3pxxkvr5cfadefdqzyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcevpp9v My brand new computer !<br/>- does not fit in my backpack (bad !)<br/>- runs Unix (good !)<br/>- OS does not have AI extension that I don&#39;t want (good !)<br/>- 32 Kb of main memory, I&#39;ll need to optimize hashtag#geogram a bit (good !)<br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/116/172/929/162/641/990/original/9d7af45e3aa5459e.png"> 2026-03-04T21:03:55Z https://nostr.now/nevent1qqsxd487csdjg6lqfscea7qm0fpcw7yvsc03f6hsthmak6m2alpy4kczyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcnrj7hr What does this new trend<br/><br/>of writing posts on<br/>social media<br/><br/>formatted into multiple tiny<br/>paragaphs<br/><br/>that contain a few<br/>words<br/><br/>only ?<br/><br/>Does it means that generative AI systems<br/>are degenerating ?<br/><br/>and will<br/><br/>then produce content<br/>token<br/>by token ?<br/><br/>Then character by<br/>c<br/>h<br/>a<br/>r<br/>a<br/>c<br/>t<br/>e<br/>r <br/>?<br/><br/>01000100110010001111<br/>01010<br/>0<br/>0<br/>00000000000000000000000000<br/><br/>Aahhh, finally, the end of all this non-sense !!! 2025-12-31T12:15:25Z https://nostr.now/nevent1qqstyef76w03jkpc49q9wug72tnqjvv5mgzd77m326a6qptpgfryckczyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpczrjmfq Geogram 1.9.8 is out !<br/><a href="https://github.com/BrunoLevy/geogram">https://github.com/BrunoLevy/geogram</a><br/><br/>Geogram is a programming library with geometric algorithm.<br/>it has mesh repair, mesh simplification, mesh intersection, Delaunay triangulation, exact predicates and much more !<br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/115/797/967/920/009/170/original/1d970c918c95c92f.png"> 2025-12-28T15:47:59Z https://nostr.now/nevent1qqs0mec76kkvtqetzjsecqc8t59k7q3kdj47xaj56w2x5m37mc00stqzyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcgdg038 Found under the christmass tree, very nice lego set for a computer graphic programmer 😉. Customized it a bit with a powerful LED.<br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/115/793/946/430/262/855/original/ee618466cf342010.jpg"> 2025-12-27T22:45:03Z https://nostr.now/nevent1qqsyx33lmp5mgu28lxmqrcxpe2c9035066dazavup4qqldlm3tsxnxczyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcnllzmk [Leaving X] .... DONE<br/>Goodby to my 10000 followers, so long X, and thanks for the fish !<br/><br/>My stream of computational physics news / hardware engineering / geek stuff will continue here:<br/>- <a href="https://www.linkedin.com/in/blevy/">https://www.linkedin.com/in/blevy/</a><br/>- <a href="https://fosstodon.org/@BrunoLevy01">https://fosstodon.org/@BrunoLevy01</a><br/>- <a href="https://bsky.app/profile/brunolevy01.bsky.social">https://bsky.app/profile/brunolevy01.bsky.social</a><br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/115/722/645/798/987/697/original/1734e716d3d0732e.png"> 2025-12-15T08:34:10Z https://nostr.now/nevent1qqsgkvlgn8axv0n660dcu2g0lrtvl0xzckvet7hr3kgy3ry25tkxv5qzyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpc58fh6d This chip is special,<br/>(<a href="https://tinytapeout.com/chips/ttsky25b/">https://tinytapeout.com/chips/ttsky25b/</a>)<br/><br/>- it has designs made by hobbyists<br/>- and, more importantly, it has two #FemtoRV designs in it !!<br/>- these two FemtoRV designs were authored by others<br/><br/>What is FemtoRV ? It is a super simple RiscV processor that we designed with <span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqyqczt3nsrmux67h7zvr7udd5yjgqyuftfyhpjrccs2s2sry47ngsvcd2pa7" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqyqczt3nsrmux67h7zvr7udd5yjgqyuftfyhpjrccs2s2sry47ngsvcd2pa7</span> (<span class="italic">nprofile…2pa7</span>)</a></span> because we were boring during COVID...),<br/>More information here: <br/><a href="https://github.com/BrunoLevy/learn-fpga/">https://github.com/BrunoLevy/learn-fpga/</a><br/><br/>I am super excited, can&#39;t wait to see whether these 200 lines of VERILOG can be turned into a real Risc-V CPU on a chip !<br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/115/722/457/209/326/108/original/e7b023b08b241bb2.png"> 2025-12-15T07:46:53Z https://nostr.now/nevent1qqs0ye9s7cftzyyrm0wpq56jjjujjx6jtnhwrc7dgj0cj8r54qc9wnczyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpc5j3qyk learn-fpga works (almost completely, SPI flash is on its way) on tang-nano-9k !<br/>Thank you for your help <span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqyz2ay568jjhxzhn0n0pqdvlgm9t6jt0rgv423twntrjnfv4rgwakjkcshwv" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqyz2ay568jjhxzhn0n0pqdvlgm9t6jt0rgv423twntrjnfv4rgwakjkcshwv</span> (<span class="italic">nprofile…shwv</span>)</a></span> !<br/><br/>What is it ? Learn to design your own processor with a FPGA in 18 simple steps<br/>What&#39;s new ? Now works with tangnano9k FPGA board and opensource toolsuite<br/>Why does it matter ? Because tangnano is cheap<br/><br/>Tutorial up to date here:<br/><a href="https://github.com/BrunoLevy/learn-fpga/blob/master/FemtoRV/TUTORIALS/FROM_BLINKER_TO_RISCV/README.md">https://github.com/BrunoLevy/learn-fpga/blob/master/FemtoRV/TUTORIALS/FROM_BLINKER_TO_RISCV/README.md</a><br/><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://cdn.fosstodon.org/media_attachments/files/115/561/077/759/574/278/original/0255fe1a8448e563.mp4"></video> 2025-11-16T19:46:34Z https://nostr.now/nevent1qqsx5jjsyuw3g7pn63jjl8dmj0r2tmaweq84504e8jqcljn38rdxu7czyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpct6vnfu AI, AI, AI everywhere, but I prefer...<br/>... a more elegant weapon of a civilized age !<br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/115/527/408/607/404/063/original/2229c2cb497e1b3c.jpeg"> 2025-11-10T21:00:12Z https://nostr.now/nevent1qqszugqqyyln3jqr8ucvjry56pyhj2e538sj2e5h08a78pju0gy4sgqzyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcdnaa6a In reply to <a href='/nevent1qqs9wx7u4gd9sxuucvy5xy035r0xu29ds5gjtjcvck8084nd5vnkrvspzemhxue69uhhyetvv9ujuerfw36x7tnsw43z7q4mmh7'>nevent1q…mmh7</a><br/>_________________________<br/><br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqyrj7vmtena97hded0cqwgs6heq8ddx9dc2kvd8vch7q9mgvdj3z67jx00p2" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqyrj7vmtena97hded0cqwgs6heq8ddx9dc2kvd8vch7q9mgvdj3z67jx00p2</span> (<span class="italic">nprofile…00p2</span>)</a></span> yes, my motivations were:<br/>- faster for my use case (and it is not negligible, in multithreaded code, avoiding dynamic allocation can be good...)<br/>- easy to compile for folks running Windows (gmp takes 10 min to compile when installed through vcpkg)<br/>- possibilities to try several optimizations and easily do non-regression tests 2025-11-10T18:13:12Z https://nostr.now/nevent1qqstk3c24cvmkxudlngawa9fp2a5k2lm4spz02a6fe564u9ctxyhujczyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcpcs5vp You are doing geometry processing, you need precision, performance, and easy compilation on Linux/Mac/Windows ?<br/>My fork of the mini-gmp lib is available here:<br/><a href="https://github.com/BrunoLevy/mini-gmp-plus">https://github.com/BrunoLevy/mini-gmp-plus</a><br/>Use it wisely ! (with great power comes great responsibilities...)<br/><br/>Image credit: Ed Sheeran<br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/115/526/126/563/868/495/original/d30f5910e5a5da0f.png"> 2025-11-10T15:34:01Z https://nostr.now/nevent1qqs2ranccjsjs0c43qs38qyrf4dxcqvh6ka6sccdgvjm3ncwr5d7r5czyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcrent7l <a href="https://github.com/BrunoLevy/learn-fpga">https://github.com/BrunoLevy/learn-fpga</a> has just reached 3000 stars on github.<br/>What is it ? a hand-on tutorial to learn processor design with FPGAs.<br/>In a couple of evenings, you will create a full-fledged Risc-V.<br/>Why would I want to do that ? Why not !!<br/><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://cdn.fosstodon.org/media_attachments/files/115/469/585/989/648/193/original/b1acd09960340e91.mp4"></video> 2025-10-31T15:54:45Z https://nostr.now/nevent1qqsqrvukj7jxrh0ycng6pelwmt7k9xwz7ft73ut7lwk87eqhc5swpkgzyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcn246gq Oops, once again I spilled some aperiodic coffee !<br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/115/464/004/486/477/055/original/0dac8cb128565ff0.png"> 2025-10-30T16:15:21Z https://nostr.now/nevent1qqswwvdypuhaev7c0mmk0rk90v9gcrlkjde7pfg3rwuc02fje4l30dqzyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpc2uhgyv #geogram 1.9.7 is out !<br/><br/>Geogram is a software library of geometric algorithms, it has mesh intersection, remeshing, CSG, Delaunay and Voronoi in 2D and 3D, constrained Delaunay triangulation in 2D ... and much more !<br/><br/>New in this version: improved compatibility with OpenSCAD.<br/><br/><a href="https://github.com/BrunoLevy/geogram">https://github.com/BrunoLevy/geogram</a><br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/115/343/149/477/496/085/original/347a61fcbe7d3c8a.png"> 2025-10-09T08:00:17Z https://nostr.now/nevent1qqsxsn572xe7s29cfc3x4afp7w7puzqu6nkch26d99n9yuesje75l4czyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcve379x Let&#39;s try to do smthg by hand<br/>Generating this starter pack used considerable resources<br/>- at least 10 ml of ink<br/>- a sheet of paper<br/>- 5 min of my time (one can guess it is not more, but at least it looks like no other one)<br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/114/427/861/165/401/981/original/d2c90bdc48bc64e5.png"> 2025-04-30T16:30:15Z https://nostr.now/nevent1qqs8wpa0f9ptxl2yvdu29vt4rm7yv4u386a2ehapgrng0nfzv9ant2czyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpcurxtvc Fun with Gallouet-Merigot scheme:<br/>Semi-discrete fluid sim with cubes.<br/><br/><video controls width="100%" class="max-h-[90vh] bg-neutral-300 dark:bg-zinc-700"><source src="https://cdn.fosstodon.org/media_attachments/files/114/194/987/262/126/185/original/a6d3aff24b2e5ad1.mp4"></video> 2025-03-20T13:27:41Z https://nostr.now/nevent1qqsqkautypefvjr8ftaevus0yl5udnvxlgf94y55yeetsm8admsuxqczyr69t0geldh4dgerud9uykk85vf60vkr2nu3nms2xjk05tgujjmpc7vfksw Rendering donuts with just shifts and adds, down the rabbit hole (amazing blog post by aik0n:<br/><br/><a href="https://www.a1k0n.net/2025/01/10/tiny-tapeout-donut.html">https://www.a1k0n.net/2025/01/10/tiny-tapeout-donut.html</a><br/><br/> <img src="https://cdn.fosstodon.org/media_attachments/files/113/837/033/395/154/166/original/cc87d0ef6dea7a3c.png"> 2025-01-16T08:15:50Z