Bruno Levy Profile picture
@BrunoLevy01@fosstodon.org Inria Research Director / Computational Physics/Cosmology / Scientific Director of Program Inria Quadrant / #riscv ambassador
Apr 26 8 tweets 3 min read
Simulation of Monge-Ampère gravity in a 60 Mpc/h cube, 256^3 particles, z=5.
Article:

with Yann Brenier and @MohayaeeR arxiv.org/abs/2404.07697
Monge-Ampère gravity (right half) creates more abundant and more diffuse filaments as compared to 𝚲CDM (left half) where filaments appear to be more fragmented.
Apr 4, 2023 168 tweets 39 min read
1/N
Have you every wondered how a microprocessor works ? How many sheets of paper do you need to write the schematics or description of a processor ? How many years do you need to study before being able to design your own processor ? How much money does it cost to try that ? Image 2/N
>Yes;1;0.05;$50
>What's that ?
>Answers to the questions in the previous post
Jan 9, 2023 6 tweets 4 min read
#geogram #geometry #programming
Hello darkness my old friend ...
Diving into exact triangle intersection code, that is exactly bugged !
Revisiting the whole approach, hopefully much much simpler in the end ImageImageImageImage You may think that once you have exact predicates it is piece of cake, but there is a surprisingly long list of particular cases: trlgs can be in the same plane, touch along a vrtx, an edge, isect can be a single point, a segment, a little triangle, it can even be a hexagon !
Jun 4, 2022 37 tweets 19 min read
#geogram is a programming library of geometric algorithms
github.com/BrunoLevy/geog… Image 2/N
It has fundamental geometric algorithms (Delaunay/Voronoi in 2D and 3D)
github.com/BrunoLevy/geog…
github.com/BrunoLevy/geog… Image
Mar 12, 2022 8 tweets 3 min read
#geometry #programming
New #geogram tutorial on surface reconstruction from #pointsets:

github.com/BrunoLevy/geog… Coming next:
- remeshing
- parameterization and texture mapping
Mar 10, 2022 12 tweets 5 min read
What's that ?
The raw scanner data for armadillo.
Can we reconstruct the armadillo from it ? Image Step 1: Filter outliers Image