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LearnOpenGL

从零学现代 OpenGL 的免费在线书，含 PBR 与骨骼动画章节，代码齐全。

3Dlearnopengl.comopenglgraphicspbr

Account

No sign-up — opens and works

Access

Opens in mainland China

Price

Free

Frequently asked

Do I need an account for LearnOpenGL?: No. It opens and works right away — that no-login rule is the only bar a site has to clear to be listed here.
Does LearnOpenGL open in mainland China?: Yes. It opens directly, no VPN needed.
Is LearnOpenGL free?: Completely free, with no paywall.

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