The examples in this branch are based on r63 and correspond to the second edition of "Learning Three.js"
The examples for the third edition of this book can be found in the following repo
https://github.com/josdirksen/learning-threejs-third
为方便查看和调试，forks之后，用github pages部署了下，网址如下： https://xsometimes.github.io/learning-threejs/chapter-xx/xxxxxx.html