cannon.js
                                
                                
                                
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                        Is this project no longer updated?
If this project is no longer updated, there are no other alternatives, so I can use the threejs physics engine. 如果这个项目已经不再更新,有没有其他替代品,让我的threejs可以使用物理引擎。
This project does indeed seem to be abandoned, even though the author claims it's just been put on hold.
But I find that it actually has enough features for most purposes, even to build a simple game. What specific feature are you missing from cannon?
If cannon really wasn't enough, there's actually plenty of alternatives, each with their own pros, but mostly cons (from my limited experience). ammo.js seems to stand out as pretty strong alternative though.
Alternatives:
- ammo.js - port of Bullet to JS
 - Oimo.js - Lightweight 3d physics engine
 - Dàpào - TypeScript branch of cannon
 - JigLibJS - port of JigLib to JS
 - bulletjs - port of parts of the Java library JBullet(http://jbullet.advel.cz/)
 - microphysics.js - simple 3D physics engine
 - Physijs - plugin for Three.js
 - Goblin Physics - full physics engine specifically for JavaScript
 
It depends what you need. They all do basic collisions, but to find out if it does any other feature you'll have to dig deep into the individual projects.
Edit 2022: Nowadays I would strongly recommend cannon-es.