ultraviolet VS crittershowdown

This one has some more traction: https://github.com/fu5ha/ultraviolet

Some other good places to look would be the source code for the ultraviolet crate and for wide.

2. Using macros for codegen, as seen in almost all other linear algebra crates, e.g. ultraviolet (https://crates.io/crates/ultraviolet)

The drawback of (1) is that it's hard to understand or extend, and the type errors are insane, and put Boost to shame. The drawback of (2) is that's just a macro. Of course (1) and (2) are not interoperable.

C++ templates are really underappreciated, because they are a single mechanism that gives you both powerful generics and macro-like codegen, while being easy to adopt gradually. (E.g. you can add concepts when it gets unwieldy, but you don't have to rewrite the whole thing.)

I built a game using Rapier! Using its deterministic mode, I built an online multiplayer game whereby players take turn slamming bugs against the other team and capture the hill.

It doesn't have a single-player mode yet (writing an AI for it is a bit more challenging than the chess-like I made) but check it out at https://evrimzone.itch.io/crittershowdown and the physics/game logic source code at https://github.com/evrimoztamur/crittershowdown/blob/e4d9a19....

I plan to write a post about how I wired it together and what I learned, but overall very solid library and well-thought of Rust-y API that enabled me to do everything I needed it to.