https://doc.babylonjs.com/resources/offsite_tutorials_list https://doc.babylonjs.com/babylon101/ https://doc.babylonjs.com/how_to/
After using import cannon from 'cannon'
it shows default is not exported by...
https://forum.babylonjs.com/t/cannon-including-problem/2287
you should use import * as CANNON from 'cannon'
tsconfig.json 中还可以在types 中再指定额外的 d.ts 目录, 默认在node_modules下寻找