各种资料链接了解一下

http://gad.qq.com/article/detail/28328

https://blog.csdn.net/langresser_king/article/details/48914901

https://blog.csdn.net/gongyiling3468/article/details/47803619

https://blog.csdn.net/qq18052887/article/details/80387987

http://www.atool.org/poly_curve.php

https://blog.csdn.net/puppet_master/article/details/79859678

https://blog.csdn.net/lynon/article/details/79018695

https://www.bilibili.com/video/av29599657?share_medium=android&share_source=qq&bbid=BC9E5A29-D393-414E-91FA-1C885826E6DC28946infoc&ts=1534689153066

https://github.com/MaxwellGengYF

https://www.assetstore.unity3d.com/cn/?stay#!/content/119877

https://zhuanlan.zhihu.com/p/34894883?edition=yidianzixun&utm_source=yidianzixun&yidian_docid=0Id1ACoW

http://jcgt.org/published/0003/02/03/paper.pdf

https://www.zhihu.com/people/ycz-19/posts

https://cloud.tencent.com/developer/article/1005933

http://gad.qq.com/article/detail/45224

https://github.com/StarsX/RayTracedGGX

http://gad.qq.com/program/translateview/7166529

https://seblagarde.wordpress.com/2013/01/03/water-drop-2b-dynamic-rain-and-its-effects/

http://www.reedbeta.com/blog/hows-the-ndf-really-defined/

https://zhuanlan.zhihu.com/p/53086060