HandsOnRust VS flecs

I'm working my way through the HandsOnRust book that guides you through creating a simple roguelike using Rust and Legion ECS. It's a really enjoyable experience so far, and I'm looking towards trying out Bevy ECS afterwards to compare the two.

https://github.com/thebracket/HandsOnRust

But if you really want to follow more things then hands on rust and zero to production are two good quality books for learning rust through game dev and web development respectively. But I would still urge you to try a few things by yourself first.

Started learning rust a while ago but I needed something to walk me through the features while building something useful. I discovered Hands On Rust and have learned more in 3 hours of building flappy bird clones than in two weeks of experimenting with tutorials.

There is Zero To Production In Rust which goes through building a webserver in rust from the ground up. Or Hands on rust for learning rust by building a game.

Some (optionally) in print: * Rust in Action * Programming Rust * Hands-On Rust * Rust for Rustaceans

Game development though might be a harder place to start. You may find other more basic areas easier to get going. Though there is a good book on learning rust with game dev Hands on Rust that you might find enough.

Other books/resources you might find helpful - Rust by example - a good compliment to The Book that shows concepts with examples. Though does not explain things as much. - Zero To Production In Rust - a look at webservers and taking them to production (still being written though) - Hands on rust - a look at introducing rust with gamedev. - Easy rust - Many more listed here

This is a beginner question. I'm following Hands-On Rust to build simple games. One thing that isn't clear to me so far is how `bracket-lib` actually load the fonts and image of different characters from a single PNG file. Is the PNG file segmented in certain pixel values so that `bracket-lib` could access each square of the image like an array? Does this mean that this PNG file must be always designed in specific ways? Thanks for helping!

One year ago, I released the first beta for Hands-on Rust. What a wild and awesome ride it has been! The book has been on the publisher's best sellers list for 50 of the last 52 weeks, since the print edition came out it's been in Amazon's top 10-20 for "C Language" and sometimes "Game Development" most of the time. I had a "good grief, am I famous?" moment when a relative (who works for one of the huge American social media companies) sent me a pic showing Hands-on Rust sitting on his boss's desk.

I've also been enjoying building My First Game™ in Bevy using ECS. The community around Bevy really shines, but Flecs (https://github.com/SanderMertens/flecs) is arguably a more mature, open-source ECS implementation. You don't get to write in Rust, though, which makes it less cool in my book :)

I'm not very proud of the code I've written because I've found writing a game to be much more confusing than building websites + backends, but, as the author notes, it certainly feels more elegant than OOP or globals given the context.

I'm building for WASM and Bevy's parallelism isn't supported in that context (yet? https://github.com/bevyengine/bevy/issues/4078), so the performance wins are just so-so. Sharing a thread with UI rendering suuucks.

If anyone wants to browse some code or ask questions, feel free! https://github.com/MeoMix/symbiants

Flecs does just that: https://ajmmertens.medium.com/why-it-is-time-to-start-thinking-of-games-as-databases-e7971da33ac3

I'm trying to optimize my workflow as much as possible, and came across this thing called an ECS. After doing a little bit more digging I found some decent guides on how you would make one, I also found one premade called FLECS. FLECS is nice and all, but I was looking for something more simple that just has the bare bones of what I need and is also configurable. I haven't been able to really find anything like that, so I was wondering if anyone had an example of maybe their way of implementing an ECS. I know how to go about it, but I'm unsure of exactly what the code would look like.

Since we wanted a common game simulation that would be on both the server and the client we looked into a few libraries that would fit our ECS needs. It was decided we were going to write this common part of our game in C++, but rust was considered. C++ was a familiar language for us so naturally EnTT and flecs came up right away. I had used EnTT before, writing some small demo projects, so our choice was made based on familiarity. In order to integrate with Unity we created a small C interface to communicate between our simulation code and Unity’s C#. Here’s close to what it looked like. I removed some parts for brevity sake.

Repository: https://github.com/SanderMertens/flecs

This is the project: https://github.com/SanderMertens/flecs (query engine implementation lives here: https://github.com/SanderMertens/flecs/tree/master/src/addons/rules)

There's also a performance question. While we can now use Blueprint nativization to convert Blueprints to C++ the result will be a fairly naive version, fast enough for most purposes but not if you're trying to push every bit of performance. This is where you're looking at making sure you're hitting things such as using the CPU cache as well as possible for an ECS system (Look at ENTT or Flecs if you want to see what they're about and why you'd want one), or a system needing to process massive amounts of data quickly such as the Voxel Plugin.

If I knew C++ and I'd heard about it before I started my current project, I would have been tempted to use this https://github.com/SanderMertens/flecs which can be built to WASM. Of course you still need JavaScript in the front end to link to the WASM part. I've recently been using esbuild to bundle my front end code, which does a pretty similar job to webpack, but is a bit faster.

When do think bevy will support entity-entity relationships ? https://github.com/bevyengine/bevy/issues/3742.

Flecs ECS already supports this: https://github.com/SanderMertens/flecs/blob/master/docs/Rela...

For a modern engine you’re probably best looking at Unity’s DOTS. You may also want to check out some of the different open source ECS libraries such as flecs and EnTT are two popular ones for C++, but there’s lots of them. Largely you’ll see lots of different approaches taken, all with their own pros and cons. Not all of them will be performant (some focus more on the design benefits) while others will be optimised for certain use cases. What you should prioritise will depend on your specific needs.