flecs
Allegro
flecs | Allegro | |
---|---|---|
48 | 24 | |
5,530 | 1,765 | |
- | 1.2% | |
9.6 | 8.3 | |
3 days ago | 6 days ago | |
C | C | |
MIT License | GNU General Public License v3.0 or later |
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flecs
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ECS, Finally
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
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Databases are the endgame for data-oriented design
Flecs does just that: https://ajmmertens.medium.com/why-it-is-time-to-start-thinking-of-games-as-databases-e7971da33ac3
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What's your way to create an ECS?
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.
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Introducing Ecsact
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.
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Prolog for future AI
Repository: https://github.com/SanderMertens/flecs
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An in-game query engine heavily inspired by prolog
This is the project: https://github.com/SanderMertens/flecs (query engine implementation lives here: https://github.com/SanderMertens/flecs/tree/master/src/addons/rules)
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What are the limits of blueprints?
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.
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What's the hot tech stack these days?
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.
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Bevy and WebGPU
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...
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any resources for expanding on ECS?
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.
Allegro
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Not only Unity...
Allegro (zlib/plain C) https://github.com/liballeg/allegro5
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Allegro library website redirected to anti-Kotaku Nazi-related page
Some nutjob has taken control of https://liballeg.org to redirect it to some anti-Nazi page that mentions Kotaku, comparing them to nazis.
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Self taught developers, what did you know when you started?
C, C++, Allegro, SDL, Some rudimentary SQL, Some basic BSD Sockets. But I also took some time to learn 3D math, trigonometry and linear algebra so I can include some basic 3D examples in my portfolio. I was later told that it was the 3D math that made the difference because if I (barely finished HS) can do that I can probably learn everything they give me.
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Recourses to make games like they did in the 90s?
Wow, DJGPP and Allegro (still going!), that takes me back - that and Bloodshed IDE were my weapons of choice back then!
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What are some of your favourite tools/libraries/frameworks to visualize or prototype something
liballeg.org
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Looking for a very basic 2d graphics library
allegro 5 is quite alright with fonts
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What are some cool modern libraries you enjoy using?
allegro5 is a great rendering library if you want to get something 2D on the screen fast
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Are there other examples of people who made games with their own engines like Minecraft ?
Hell, their website says in the first few sentences it isn't an engine.
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Where to start?
A while ago I was getting started with the Allegro5 game engine (+Rust bindings). It's the same engine used for Factorio. I wrote a simple egui-integration to have nicer UI options. It was mostly for myself and is thus poorly documented but maybe you get some ideas how to make it work.
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Resources for C++
Here's a simple program using Allegro
What are some alternatives?
entt - Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more
raylib - A simple and easy-to-use library to enjoy videogames programming
JUCE - JUCE is an open-source cross-platform C++ application framework for desktop and mobile applications, including VST, VST3, AU, AUv3, LV2 and AAX audio plug-ins.
Cocos2d - Cocos2d-x is a suite of open-source, cross-platform, game-development tools utilized by millions of developers across the globe. Its core has evolved to serve as the foundation for Cocos Creator 1.x & 2.x.
Boost - Super-project for modularized Boost
GLFW - A multi-platform library for OpenGL, OpenGL ES, Vulkan, window and input
SDL - DEPRECATED: Official development moved to GitHub
Godot - Godot Engine – Multi-platform 2D and 3D game engine
Folly - An open-source C++ library developed and used at Facebook.
Spring RTS game engine - A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/
Seastar - High performance server-side application framework
Oxygine - Oxygine is C++ engine and framework for 2D games on iOS, Android, Windows, Linux and Mac