For no good reason I was thinking about physics engines and came across this. As I was looking for a new challenge I took a look and as BitOfGold said the API is horrible but though I would give it a go. I took this example and had a go at making it work with Babylon. Never having worked with 'workers' before I had a go at doing a test with a direct implementation with Babylon.js which is here  and if anyone is interested the code is at github. Very early days but slowly over the nex