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ui-mock
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Rust hello world app for Windows 95, cross-compiled from Linux, no MSVC
It's quite possible to develop Rust for Windows without using Windows.
Try my open source "ui-mock".[1] This is a test of the cross-platform stack. Just get the repository with "git clone", and make sure you have Rust installed for target "x86_64-pc-windows-gnu". See the Cargo.toml file for build instructions.
This is a game-type user interface. It's just some menus and a 3D cube. It doesn't do much, but it exercises all the lower levels. This allows debugging cross-platform problems in a simple environment. The main crates used are winit (cross-plaform window event handling), wgpu (cross-plaform GPU handling), rfd (cross-platform file dialogs), keychain (cross-platform password storage), egui (Rust-native menus and dialogs), and rend3 (safe interface to wgpu). For graphics, it uses Vulkan, so it will run on Windows back to the last release of Windows 7. Not Windows 95, though; it's 64-bit. It will also run under Wine, so you don't even need a Windows system to test.
My metaverse client uses the same stack. It's compiled on Linux, and runs on both Linux and Windows. So I'm building a high-performance 3D graphics program for Windows without even owning a Windows system or using any Microsoft software.
[1] https://github.com/John-Nagle/ui-mock
- Really frustrated. [Warning: Bit of a negative rant]
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We're still not game, but there has been progress. A progress report.
Profiling on the CPU side is well handled by tracy, which is a game-oriented profiler. My programs render-bench and ui-mock are prepped for Tracy, as is Rend3, so you can try it out on them.
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We're not really game yet.
ui-mock -- game GUI test fixture This exercises rfd->egui->rend3->wgpu. It's a game GUI with menus and dialogs, but no game behind it, just a 3D drawing of a cube. It's useful for making bugs in that stack repeatable. That's been helpful in wringing out obscure bugs in egui.
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Kind of quiet. So, my wishlist
Egui works well with Rend3. Here's my example and library for that. It's a dummy game UI; no game, but brings up menus atop Rend3 3D. Egui is very low level. Each dialog takes a lot of code. Something to generate dialogs from some kind of template would be useful. I have many of those to do. Incidentally, does anyone have examples of good color themes for egui? The default is shades of black on black, which is a bit harsh. I'd like to see some examples where the aesthetics are better.
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My Return to Desktop Applications
There's an attempt to make this work for Rust desktop applications. There's the winit crate, which does cross-platform windowing and event loops. There's egui, for menus and subwindows. There's rfd, for file dialogs, which are special for security reasons. And there's wgpu, for cross-platform 3D.
I'm using all of these in my ui-mock,[1] which is a GUI for a game without the game. It has 3D graphics with 2D GUI elements on top. I'm using this to shake down all the cross-platform problems for my metaverse client. My own code, which is 100% safe Rust, has no platform dependent code.
Results are pretty good. There's minor dirty laundry in those libraries, which has been reported to the various maintainers. Stuff like this:
- You can get a file dialog hidden behind the main window, which, in a full screen program, is a real problem. Mostly a Linux problem; works fine on Windows.
- Full screen on Windows mode under Wine 7 crashes Wine. Known Wine bug.
- Warnings from WGPU, but it works around all of them with some minor performance loss.
- Cross-platform packaging, to make a Windows installer without Windows, isn't implemented yet.
So, not big stuff. A lot of stuff works that you might not expect to work, such as profiling with tracy. Wgpu is taking care of Vulkan vs Apple's Metal. (Apple just had to Think Different, to the annoyance of everybody doing 3D.) Opening a web page in the default browser is cross-platform. You can cross-compile - I build the Windows version on Linux, without using any Microsoft tools.
With some more work, I could make this work on WASM and Android as well, but that requires some special casing, mostly because WASM doesn't have proper threads.
So cross-platform desktop development is working pretty well. Most of the problems I'm running into would not appear in a more typical application.
[1] https://github.com/John-Nagle/ui-mock
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Godot + Rust dev in MacOS
I have a Rend3/Egui/WGPU program, https://github.com/John-Nagle/ui-mock
piston
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placing pixels
Well, it depends on how you use it; writing to an image buffer isn't much less efficient than writing to any normal buffer (in fact, although displaying your scene to a window efficiently is important, your main bottleneck will be the actual ray tracing loop). You may want to read this article for a practical example of using an ImageBuffer to create and draw a texture with Piston. Other window backends you could use, apart from pixels which was already mentioned in another comment, include minifb and Mini GL, though I haven't personally used them.
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Ways to create game engines
And I really like generic systems where you can create a lot of different things. A program that interested me is Piston (https://github.com/PistonDevelopers/piston), I haven't researched it in depth yet, but the concept of being able to create several things with a base and different modules is very interesting
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Really frustrated. [Warning: Bit of a negative rant]
Try Piston
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What would be best for a 2D only game? Piston, Bevy, or Fyrox?
I haven't seen too much on Piston. No idea how active or recent these projects are but I'm still interested in working with it.
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I made my first GL project using Piston.
Check out their homepage, https://piston.rs, they even show off some great examples of how their library has been used!
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Emulating the Sega Genesis - Part II
Before I could implement the display output, I needed something to draw the images onto. There are quite a few Rust crates available to create a GUI window and update it with 2D graphics. Most of these are of course intended for making games, and also include ways of getting key presses as input, which I'll also need. I looked at Piston, which I've used before on other projects, Macroquad, which also supports web assembly as well as desktop targets, Pixels, which is intended specifically for 2D games, and Minifb, which is also specifically for 2D applications, but is much simpler. I also tried out libretro, which is specifically made for video game emulation, but I found it much more restrictive than the others because of it's narrow focus.
- Piston.rs: un motor de creación de juegos hecho en Rust
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I'm a "low-level, terminal-only" kind of developer, completely new to the game dev world. I've been working on a 2D platformer in my spare time. Can you explain to me what I'm missing out on, by not using a "game engine"?
Depends on my goals. I year ago I wanted to learn rust, so I used piston for a gamejam. (There are several rust engines including bevy, piston, amethyst. They probably vary in quality, features, and constraints.) Piston was a terrible experience because compilation is slow even on that tiny project.
- Question about rust graphics libraries
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Rust Game Engines (again)
Piston
What are some alternatives?
couchbase-lite-C - C language bindings for the Couchbase Lite embedded NoSQL database engine
bevy - A refreshingly simple data-driven game engine built in Rust
Ambient - The multiplayer game engine
ggez - Rust library to create a Good Game Easily
openjpeg - Official repository of the OpenJPEG project
Amethyst - Data-oriented and data-driven game engine written in Rust
rend3 - Easy to use, customizable, efficient 3D renderer library built on wgpu.
rust-sdl2 - SDL2 bindings for Rust
cargo-bundle - Wrap rust executables in OS-specific app bundles
macroquad - Cross-platform game engine in Rust.
ttrss-sandstorm - Sandstorm port of Tiny Tiny RSS
RG3D - 3D and 2D game engine written in Rust [Moved to: https://github.com/FyroxEngine/Fyrox]