Box2D
bgfx
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Box2D | bgfx | |
---|---|---|
31 | 71 | |
7,216 | 14,194 | |
- | - | |
0.0 | 9.3 | |
8 days ago | 40 minutes ago | |
C++ | C++ | |
MIT License | BSD 2-clause "Simplified" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Box2D
- Nebula is an open-source and free-to-use modern C++ game engine
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Linear code is more readable
Why is 600 lines too long? How are you able to make that judgment call without first knowing what the algorithm is even doing? People setting arbitrary limits like this is what leads to convoluted spaghetti, instead of just taking things on a case by case basis. Here’s a function from the Box2D code running a particularly complex algorithm for solving contact velocities https://github.com/erincatto/box2d/blob/411acc32eb6d4f2e96fc... .
It’s 310 lines long. It reads very well, and it looks very maintainable. It has very clear comments explaining the reasoning behind the harder parts of the code. Would you reject this code because it’s pretty long? I wouldn’t.
There is no such thing as too long or too short. There’s overengineered and there’s underengineered and there’s a sweet spot in the middle that has the perfect amount of engineering with the least amount of complexity (preferably no additional complexity than the original problem warranted). Sometimes, the problem at hand is inherently a large algorithm and requires many lines of code. Don’t split it up! It just makes it harder for future maintainers who now have to figure out if the additional functions are actually being used elsewhere or if they’re just there to make the code “pretty”.
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C++23: The Next C++ Standard
TIL Box2D must not be serious code because it doesn't use copious amounts of explicit temporaries[0].
And just for the record, I'm very glad Erin Catto decided to use operator overloading in his code. It made it much easier for me to read and understand what the code was doing as opposed to it being overly verbose and noisy.
[0]: https://github.com/erincatto/box2d/blob/main/src/collision/b...
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Make a game engine in C++
For Physics Box2d can be used as a simple starting point.
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Does anyone know any good open source project to optimize?
I suspect most C++ physics libraries like Box2D (https://github.com/erincatto/box2d) or Bullet3 (https://github.com/bulletphysics/bullet3) could really benefit a lot from SIMD.
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what to start learning
for 2D physics have a look at Box2D it's amazing https://box2d.org/
- Where and how can I learn to make simulation programs? I like to be a simulation developer!
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What would be the best library to build 2D simulations in python?
Do you mean drawing it or just the positions at each time step? Box2D has python bindings and would be ideal. https://box2d.org/
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How can I create a physics simulation?
I mean... there is also Box2d... (https://box2d.org/) for 2d stuff as /u/Disembleergon mentioned.
bgfx
- WebKit Switching to Skia for 2D Graphics Rendering
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Is it possible and realistic to learn independent of an API?
Sort of, I'd recommend a modern higher level API. I'm not sure what the current recommended ones are (probably bgfx), but assuming the wrapper is "low level enough", then the concepts you learn are still going to apply.
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Ask HN: Released games built on FOSS engines?
https://github.com/bkaradzic/bgfx for just that FOSS intermediate rendering library (includes Minecraft)
- Valve Says Counter-Strike 2 for macOS Not Happening, There Aren't Enough Players
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The Ultimate Cross-Platform Rendering Engine?
BGFX: Pretty mature and easy to use with many backends.
- Cairo – Open-Source 2D Graphics Layer/API with Fonts and Many Back-Ends
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LWJGL = SFML vs Allegro vs SDL vs Ogre vs ???
There's kind of a lack of this for C++ in 3D, I think it's often due to the necessity of a secondary scripting language in game engines with C++, which isn't necessarily needed in Java or C#. SFML is like that (but also 2D), Godot is similar (but more geared towards 2D). Ogre3D is an actual engine like I mentioned earlier, not sure how easy it is to use. Cocos2d is higher level, but is also 2D only. I'm not fond of SDL, it feels like a windowing library with slow old school immediate mode stuff attached, so it ends up not being good at the rest of the tacked on things. SDL is popular as a windowing library, and it's why you see it used everywhere (but the most notable uses of it aren't using their drawing capabilities), I often see bgfx thrown around, and for you it might be a good choice, though I have no experience with it.
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Is it a crazy idea to create a 3D operating system?
Another route could be using an abstraction over Vulkan (faster, more efficient, more difficult): bgfx, dawn, magma, or wgpu (Rust).
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The update we all want but will never get
my guess for why renderdragon made performance worse is because old bedrock was built on bgfx which is a layer of abstraction ontop of a bunch of graphics apis which benefits the programmer because they can write the graphics code once and use it on a bunch of graphics apis (just like java! i heart cross compatibility)
now, java is actually quite a performant language and even if its not most of the performance bugs in mc are due to it being single threaded, inefficient chunk generation and optimizing, and it built ontop of opengl WHICH isn't much of a performance hit but its still ehh idk it doesn't matter that much (NOW SWITCHING THE GAME TO AN ENTIRELY DIFFERENT GRAPHICS API WOULD SUCK ASS TO DO (and vulkan is quite verbose :))) (AND also bgfx would probably be better due to it being an abstraction layer ontop of all the graphics apis so minecraft could target many depending on your platform (and also bedrock used to (or still does i dont know) use bgfx before they switched to just two (IF IM READING MC WIKI RIGHT BECAUSE IM NOT ENTIRELY SURE IF THEY USE BGFX STILL ?? SO THEY COULD STILL BE TARGETING MULTIPLE YET THEY JUST WROTE THEIR NEW SHIT BAD IDK))
What are some alternatives?
GLFW - A multi-platform library for OpenGL, OpenGL ES, Vulkan, window and input
Bullet - Bullet Physics SDK: real-time collision detection and multi-physics simulation for VR, games, visual effects, robotics, machine learning etc.
DiligentEngine - A modern cross-platform low-level graphics library and rendering framework
magnum - Lightweight and modular C++11 graphics middleware for games and data visualization
Ogre 3D - scene-oriented, flexible 3D engine (C++, Python, C#, Java)
sokol - minimal cross-platform standalone C headers
The-Forge - The Forge Cross-Platform Rendering Framework PC Windows, Steamdeck (native), Ray Tracing, macOS / iOS, Android, XBOX, PS4, PS5, Switch, Quest 2
Skia - Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.
Chipmunk - A fast and lightweight 2D game physics library.
raylib - A simple and easy-to-use library to enjoy videogames programming
wgpu - Cross-platform, safe, pure-rust graphics api.
urho3d - Game engine