wenx0826 / birch-san-liquidfun-play-2

liquidfun-play-2

Note: Requires Chrome/Chromium-based browser in development. Firefox and Safari supported after production bundle.

Demo

Demonstrates functionality of box2d-wasm's liquidfun release.

Iterates on my previous liquidfun-play repository with the following changes:

• introduces WebAssembly SIMD optimization from newer box2d-wasm release
• no longer delegates physics to a Web Worker; workers have disadvantages:
  • more difficult to develop
  • various features either unsupported or complex to bundle for some browsers
  • the main thread had no work to do anyway! better to have fewer cores active, so CPU can boost to higher clock speeds
• implements water shaders from Liquidfun's EyeCandy demo

Achieves high framerate by:

• avoiding allocations in main loop
  • no new
  • no []
  • no {}
  • pre-allocate structures
  • fewer allocations = (fewer?) (shorter?) GC pauses
• minimize JS->wasm calls in favour of accessing Emscripten heap directly
  • well, maybe this doesn't matter
• physics via WebAssembly with SIMD acceleration
• rendering in WebGL

Usage

npm start

Runs the app in the development mode. Open http://localhost:8080 to view it in the browser.

License

This repository is Zlib-licensed (full text in LICENSE.zlib.txt).
Additionally, contributions ported or adapted from the liquidfun repository are licensed as described in LICENSE.liquidfun.txt.