I fixed the problem with the energy 😅
I also ported the code to use f64 everywhere instead of f32 for physics.
2^14 spheres this time ✨
I also made the repository public but it will not be published as a library. It is just my educational progress with my thesis:
https://codeberg.org/mo8it/master-thesis
Progress with my physics from scratch in #Bevy 😇
I was asked to simulate one sphere and plot its energy to validate my physics implementation.
But since I use #Rust, I thought why not simulate 10000 spheres instead? 😂
I don't understand the energy spike at the beginning, but at least the energy is stable later.
I am following this fantastic #XPBD tutorial in #Bevy by @johanhelsing and I highly recommend it after learning some of the basics of Bevy 😍
https://johanhelsing.studio/posts/bevy-xpbd/
The tutorial isn't complete yet, but the first 6 parts are already a lot of material!
The attached GIF is the result of the first part ✨
@johanhelsing thank you for this treasure 🥰
PS: I know there is the physics library bevy_xpbd, but I want to implement XPBD from scratch for learning :D
In a sudden and ambitious outburst of not-invented-here syndrome combined with hype-train, I decided there weren't enough physics engines out there and it would be a good idea to write one myself using all the latest buzzwords. In this tutorial series, I'll explain step-by-step how to build an extended position-based dynamics (XPBD) rigid-body physics engine using entity component system (ECS) architecture in rust.
Been going on a tear with #pico8. Here's an XPBD library with 4 little demo scenes.
@chrisbiscardi Well documented cautionary tales like these are extremely helpful.
Thank you for posting them!
I'm making my own bevy_ecs-based (#xpbd) physics engine for cargo space. Wrote a post about tilemap collision, one-way platforms and how I implemented and optimized the collision broadphase.
I started filling in the gaps in my home-made physics implementation. In this post I go painstakingly detailed about my adventures in implementing one-way platforms and prematurely optimizing broadphase collision detection. Bonus yak-shaving sections on bevy_screen_diagnostics, and bevy_sparse_grid_2d
Mo Bitar 
Shane Celis
MadMike77
Johan Helsing