bevy

First: I won't pretend to be a Unity DOTS expert, but I have worked with it briefly. There are many similarities: 1. The general data model: entities, components, systems 2. Running systems in parallel 3. Archetypal ECS: a specific ECS storage strategy that groups entities of the same "data layout" together to increase cache friendliness during iteration. Bevy has a lot of query/filtering/change detection features that I haven't seen implemented the same way elsewhere. But I can't comment on whether or not Unity DOTS has those features because I don't have enough experience with it. I think we differ the most in UX. Wild (hard to verify) claim: I think Bevy has the most ergonomic ECS in existence. If you compare a Unity example (https://github.com/Unity-Technologies/EntityComponentSystemS...) to a Bevy example (https://github.com/bevyengi

Wow! Another very impressive release so soon! I know that Bevy has no builtin physics solution at the moment and read the issue [1]. My understanding is that the plugins for Rapier are the main way to go for now. How "useful" is that situation currently and what are the general long term plans in that area beyond the current experimentation? [1] https://github.com/bevyengine/bevy/issues/83

the system() method is part of the IntoSystem trait that converts the function into a System object: https://github.com/bevyengine/bevy/blob/master/crates/bevy_e... There are macros below that implement that for Func types.

I'm not replying to detract from your point, because I agree with you whole heartedly that competing ecosystems are not mature enough to dethrown C++ if you're someone who is pragmatic and wants to get things done. C++ has an enormous number of high quality libraries with often no equivalents in competing languages. There are some compelling ECS frameworks emerging in Rust if anyone is interested, though. Legion -- https://github.com/amethyst/legion Hecs -- https://github.com/Ralith/hecs Shipyard -- https://github.com/leudz/shipyard Specs -- https://github.com/amethyst/specs Bevy -- https://github.com/bevyengine/bevy -- not strictly comparable as it's an entire game engine, but it's built around an (imo) more ergonomic fork of hecs. Some benchmarks -- https://github.com/rust-gamedev/ecs_bench_suite

Not yet, but it's one of our current focus areas: https://github.com/bevyengine/bevy/issues/254

Github link https://github.com/bevyengine/bevy dang, do you want to swap the link to github?