box2d-wasm

network inspector says 2.1MB. but that's dominated by a 1.3MB image. the main assets of the library are: - Box2D.simd.js (422kB) - Box2D.simd.wasm (266 kB) a minimal demo that uses the library can be created in just a few kB: https://github.com/Birch-san/box2d-wasm/tree/master/demo/mod...

Author here. This demo showcases liquidfun-wasm[0], my effort to revive liquidfun[1] (a fork which adds fluid simulation and soft-body physics to Box2D[2]). to make liquidfun-wasm, I repurposed my existing box2d-wasm[3] and pointed it at a different release of Box2D — a commit obtained by rebasing liquidfun over 7 years of upstream Box2D changes[4]. the end result is that liquidfun is now distributed in WebAssembly and with TypeScript typings for the first time. The TypeScript typings are generated from WebIDL bindings via my webidl-to-ts[5] compiler. this demo in particular aims to bring to the Web the shaders from the liquidfun EyeCandy demo[6], and show how fast JS can run if you avoid incurring the garbage collector (the main loop tries not to allocate objects). the demo repurposes gravity and drag calculations that I'd used previousl

Liquidfun [0] diverged from Box2D at v2.3.0, circa November 2013. liquidfun-wasm [1] is my effort to rebase the liquidfun contributions onto latest Box2D, v2.4.1 (October 2020), and to distribute it in WebAssembly with TypeScript typings. this work is detailed in liquidfun-wasm's first release notes. [2] I've also enabled WASM SIMD acceleration (via LLVM's autovectorizer) on supported devices. Haven't yet measured what performance difference this makes. [0] http://google.github.io/liquidfun/ [1] https://github.com/Birch-san/box2d-wasm/releases/tag/liquidf... [2] https://github.com/Birch-san/box2d-wasm/releases/tag/v4.0.0-...