box2d-wasm

Have a look here, this guy maintains a wasm build of box2D https://github.com/Birch-san/box2d-wasm And Catto said, Box3D is very similar to Box2D.

Well, I would like to be able to do 1000s of raycast per frame (360 for each bot), but cannot and yes, I do not use godot, but my own engine (with pixijs for graphics and a emscriptem port of box2d for physics https://github.com/Birch-san/box2d-wasm.) Godot uses box2d, too, so that would be convenient, if I switch to godot, but only if it is worth the performance improvement, which it currently does not seem to be. Maybe next year.

Following the article, you build a simple 2D physic simulation (only for balls). Did by chance anyone expand on that to include boxes, or know of a different approach to build a physic engine in WebGPU? I experiemented a bit with it and implemented raycasting, but it is really not trivial getting the data in and out. (Limiting it to boxes and circles would satisfy my use case and seems doable, but getting polygons would be very hard, as then you have a dynamic size of their edges to account for and that gives me headache) A 3D physic engine on the GPU would be the obvious dream goal to get maximum performance for more advanced stuff, but that is really not an easy thing to do. Right now I am using a Box2D for wasm and it has good performance, but it could be better. https://github.com/Birch-san/box2d-wasm The main problem with all this is

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-...