# PHPのバージョン確認
php -v

#PHPのインストール確認
yum list installed | grep php

# PHPの削除
yum remove php*

# PHP7.4のインストール
yum install –enablerepo=remi,remi-php74 php php-devel php-mbstring php-mysqlnd php-pdo php-gd

# https の restart
service httpd restart

Optimizing PBR
https://community.arm.com/cfs-file/__key/communityserver-blogs-components-weblogfiles/00-00-00-20-66/siggraph2015_2D00_mmg_2D00_renaldas_2D00_slides.pdf

Microfacet Based Bidirectional Reflectance Distribution Function
http://jbit.net/~sparky/academic/mm_brdf.pdf

Directional Statistics BRDF Model
https://vision.ist.i.kyoto-u.ac.jp/research/dsbrdf/

Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs
http://jcgt.org/published/0003/02/03/paper.pdf

Physically Based Shading in Call of Duty: Black Ops
https://blog.selfshadow.com/publications/s2013-shading-course/lazarov/s2013_pbs_black_ops_2_notes.pdf

Spherical Gaussian approximation for Blinn-Phong, Phong and Fresnel
https://seblagarde.wordpress.com/2012/06/03/spherical-gaussien-approximation-for-blinn-phong-phong-and-fresnel/

“Call of Duty: Black Ops 2 のより物理ベースなシェーディング(SIGGRAPH 2013)”の説明
https://hanecci.hatenadiary.org/entry/20130812/p1

Paper

Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs

チュートリアル16：シャドウマッピング
http://www.opengl-tutorial.org/jp/intermediate-tutorials/tutorial-16-shadow-mapping/