微信文章：
https://mp.weixin.qq.com/s/K-Wgkw0QN44pYD0qRwHP1g
https://mp.weixin.qq.com/s/GNakcqGP23DHLEiKkD2FbA
https://mp.weixin.qq.com/s/tXppm1i3GTDHMp9OD7Sz4g
https://mp.weixin.qq.com/s/5SaJD8toaiximZCVK3o5fA
https://mp.weixin.qq.com/s/eP2rE45pIvtwTqomt5j6GQ
其他文章：
https://juejin.cn/post/7148825018024230942
https://blog.csdn.net/hu694028833/article/details/80363012
https://cloud.tencent.com/developer/article/1692580
https://www.cnblogs.com/sin998/p/15257006.html
https://blog.csdn.net/cloudqiu/article/details/78808622
https://blog.csdn.net/qq_41368247/article/details/106194092?spm=1001.2014.3001.5502
https://blog.csdn.net/qq_41368247/article/details/106214710
https://blog.csdn.net/puppet_master/article/details/49636795
https://blog.csdn.net/orbit/article/details/7082678
https://gwb.tencent.com/community/detail/102577
https://blog.csdn.net/orbit/article/details/7082678
https://blog.csdn.net/orbit/article/details/7101869
https://developer.aliyun.com/article/227306
http://home.ustc.edu.cn/~zh2991/thesis/PolygonalMeshProcessing_ReadingReport.pdf
文档结构：
- 基础数学运算(点乘 叉乘公式和几何意义)
- 包含&交叉判断(包含和交叉各举一个例子)
- 基于几何表示渲染图形(介绍显式和隐式表示的定义，各举一个例子，再介绍几个SDF的例子)
- 如果篇幅不够，介绍用geogebra网站来调试和理解SDF等公式
SDF的例子注释:
2D基本图形的Sign Distance Function (SDF)详解（上）
用SDF绘制贝塞尔曲线ShaderToy
(对于for循环的贝塞尔曲线绘制方法udBezier，网上暂无解释，可以我看懂后发博客)
用SDF绘制贝塞尔曲线Github
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