kotsoft

4 ms·

1. 1.▲
   by kotsoft 2y ago

   UPDATE: I've added a "hacker mode" for you all! You can now specify a userUpdate function and it will run it each frame. See my twitter post for a demo of it. https://x.com/kotsoft/status/18063629562
2. 2.▲
   by kotsoft 2y ago

   Here's a video of the spatial sounds system from my 3D sims: https://www.youtube.com/watch?v=0HJ5lMpWTXQ I will see if I can bring it to WebAudio.
3. 3.▲
   by kotsoft 2y ago

   Thanks! With 3D the main challenge might be visualizing the layers separately. Ideally each of the phases would have some kind of metaball effect and also be transparent and even refract. Will be pretty tough to do and will have to fight wi
4. 4.▲
   by kotsoft 2y ago

   Hi, I've updated the home page on my site ( https://grantkot.com ) with links to my other socials, like the YouTube and itchio pages. Twitter for more casual frequent updates, and YouTube for longer summary updates. The itchi
5. 5.▲
   by kotsoft 2y ago

   Yeah agree. The objective was more to make a physics toy that would run on single core on a phone than something for actual scientific or industrial use. I could add additional iterations or do pressure projection but then there would be co
6. 6.▲
   by kotsoft 2y ago

   If you use WebGPU, for your acceleration structure, try to use the algorithm here presented in the Diligent Engine repo. This will allow you not to transfer data back and forth between CPU and GPU: https://github.com/Diligen
7. 7.▲
   by kotsoft 2y ago

   Yeah, pretty much this, I've experimented with putting on the GPU a bit but I would say particle based is 3x faster than a multithreaded & SIMD CPU implementation. Not 100x like you will see in Nvidia marketing materials, and on mo
8. 8.▲
   by kotsoft 2y ago

   You actually can adjust the settings for this. In settings>simulation, instead of sameRestDensity being 8 make it 0 and make it higher for diffRestDensity. I recommend doing it with low gravity as well (you can get zero g by clicking ena
9. 9.▲
   by kotsoft 2y ago

   Thanks! I am definitely working on bringing more to the WASM world. I'd begun experimenting with 3D and multithreading and then last week decided to circle back to the 2d demo and polish it up a bit more.
10. 10.▲
    by kotsoft 2y ago

    Yes, the previous one is: https://news.ycombinator.com/item?id=40429878 There are some new features since then and some major speed improvements from using SIMD. I do still see complaints about the compressibility so I stil
11. 11.▲
    by kotsoft 2y ago

    With keyboard there are also the shortcuts: 1-4 to emit the different materials a/r to attract repel from mouse x/c to rotate a bit
12. 12.▲
    by kotsoft 2y ago

    This is still the same kind of simulation, based on the Particle-based Viscoelastic Fluid Simulation paper. I updated it to use Wasm SIMD more fully with the help of Clang Vector Extensions, Compiler Explorer and Wasm Analyzer. Compiler exp
13. 13.▲
    by kotsoft 2y ago

    Thanks. It's a WebAssembly simulation so mostly CPU and very light on the GPU because it's just drawing points. It will actually run on mobile too with multitouch.
14. 14.▲
    by kotsoft 2y ago

    I'm not sure if the between layers thing might be a similar thing to when bubbles show up on the sides and bottom of a glass of water. Some of the bubbles are also staying because once it's settled down, there isn't enough ac
15. 15.▲
    by kotsoft 2y ago

    Hi, I made this demo. This is actually all from the paper Particle-based Viscoelastic Fluid Simulation (Simon Clavet, Philippe Beaudoin, and Pierre Poulin). It is an SPH type (particle-particle interactions), not MPM (particle-grid-particle