https://github.com/mate-h/box2d-wasm

A WebAssembly build of the Box2D physics engine in Svelte.
https://github.com/mate-h/box2d-wasm

Last synced: 2 days ago
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A WebAssembly build of the Box2D physics engine in Svelte.

• Host: GitHub
• URL: https://github.com/mate-h/box2d-wasm
• Owner: mate-h
• Created: 2020-03-23T12:31:22.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2023-03-06T02:28:40.000Z (over 1 year ago)
• Last Synced: 2023-03-12T05:26:25.368Z (over 1 year ago)
• Language: JavaScript
• Homepage: https://box2d.vercel.app
• Size: 1.72 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 7
• Metadata Files:
  • Readme: README.md

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README

        
# box2d-wasm

# Demo

https://box2d.vercel.app/

- Space + Click and drag to pan, or mac trackpad two fingers), zoom with scroll or pinch

- Drag objects around to see how the physics engine behaves

- Clone the repo and customize the level easily by editing a JSON

# Description

A WebAssembly build of the Box2D physics engine in Svelte.

Box2D is one of the most well-known physics engine implementations out there. I decided to demonstrate its performance by browsing around GitHub and reviewing repositories that have ported it to web. I have successfully discovered a WebAssembly port of the original Box2D implementation at [github.com/kripken/box2d.js](https://github.com/kripken/box2d.js/), but the code was largely unstructured and not using modern ES6 features such as modules. I ended up building Box2D using `emscripten` myself, but from the modified source I found in this repository.

I moved some of the Box2D debug renderer code into a new architecture, by wrapping it in a `Game` class to contain the app's settings, state, and main event loop. The scene is loaded from a json file which is typically produced using the RUBE Box2D Editor. Then I added support for retina screens and touchpad controls for the ultimate macbook experience.

Read more and comment on my site [mateh.dev](https://mateh.dev/Physics-Engine-b8c734c7f038462e939a11518adb8464)