Quaternion
quaternionic
Our great sponsors
Quaternion | quaternionic | |
---|---|---|
3 | 2 | |
628 | 79 | |
2.2% | - | |
8.7 | 5.8 | |
about 2 months ago | about 1 month ago | |
C++ | Python | |
GNU General Public License v3.0 only | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
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.
Quaternion
-
OpenSUSE Linux Gains Momentum: A Look at Its Growing Popularity
> Meanwhile there have been exactly zero new F/OSS desktop apps for over a decade except IDEs and even those are mostly Electron-based. What a mess.
Er, that's just objectively not true. Here's exactly one new FOSS desktop app: https://github.com/quotient-im/Quaternion - I don't know how old it is, but it's a Matrix client and Matrix is only 8 years old so less than a decade.
- Haiku R1/beta4 has been released
-
Notes on Concurrency Bugs
In terms of shared-memory threading concurrency, Send and Sync, and the distinction between &T and &Mutex and &mut T, were a revelation when I first learned them. It was a principled approach to shared-memory threading, with Send/Sync banning nearly all of the confusing and buggy entangled-state codebases I've seen and continue to see in C++ (much to my frustration and exasperation), and &Mutex providing a cleaner alternative design (there's an excellent article on its design at http://cliffle.com/blog/rust-mutexes/).
My favorite simple concurrent data structure is https://docs.rs/triple_buffer/latest/triple_buffer/struct.Tr.... It beautifully demonstrates how you can achieve principled shared mutability, by defining two "handle" types (living on different threads), each carrying thread-local state (not TLS) and a pointer to shared memory, and only allowing each handle to access shared memory in a particular way. This statically prevents one thread from calling a method intended to run on another thread, or accessing fields local to another thread (since the methods and fields now live on the other handle). It also demonstrates the complexity of reasoning about lock-free algorithms (https://github.com/HadrienG2/triple-buffer/issues/14).
I suppose &/&mut is also a safeguard against event-loop and reentrancy bugs (like https://github.com/quotient-im/Quaternion/issues/702). I don't think Rust solves the general problem of preventing deadlocks within and between processes (which often cross organizational boundaries between projects and distinct codebases, with no clear contract on allowed behavior and which party in a deadlock is at fault), and non-atomicity between processes on a single machine (see my PipeWire criticism at https://news.ycombinator.com/item?id=31519951). File saving is also difficult (https://danluu.com/file-consistency/), though I find that fsync-then-rename works well enough if you don't need to preserve metadata or write through file (not folder) symlinks.
quaternionic
- Best library for numpy + quaternion
-
Extending Numpy: I thought this would be simple
Fortunately, the "quaternion" component of the project has gone on, in two incarnations. One is https://github.com/moble/quaternion/, which continues to use the dtype approach. The other is https://github.com/moble/quaternionic/, which instead creates a subclass of ndarray.
What are some alternatives?
diffractsim - ✨ A flexible diffraction simulator for exploring and visualizing physical optics.
quaternion - Add built-in support for quaternions to numpy
fdtd - A 3D electromagnetic FDTD simulator written in Python with optional GPU support
haiku - The Haiku operating system. (Pull requests will be ignored; patches may be sent to https://review.haiku-os.org).
pgadmin3 - PgAdmin3 с поддержкой PostgreSQL 16
clientpp - Krunker client written in C++ and powered by WebView2
triple-buffer - Implementation of triple buffering in Rust
mini-cheetah-tmotor-python-can - Python Motor Driver for Mini-Cheetah based Actuators: T-Motor AK80-6/AK80-9 using SocketCAN Interface
clifford - Geometric Algebra for Python
SPSCQueue.h - A bounded single-producer single-consumer wait-free and lock-free queue written in C++11
WonderBrush-v2 - Last known version of the code to WonderBrush (as included in Haiku)
v86 - x86 PC emulator and x86-to-wasm JIT, running in the browser