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Re:Manim – Python library for creating mathematical animations by ZYinMD on Sunday March 13, 2022 @08:48AM (#30660780)
I wonder what 3 Blue 1 Brown uses. I heard he uses "a library he built himself, which now has a small community".

Edit: sorry for being a joke but I saw "Python library math animation" and I immediately thought of 3B1B but I really had no idea this was it!

Re:Manim – Python library for creating mathematical animations by awesomelvin on Sunday March 13, 2022 @08:56AM (#30660839)
He is literally the creator of Manim and used it for all his videos. He also publishes the source code of each video on his GitHub account.
Re:Manim – Python library for creating mathematical animations by sundarurfriend on Sunday March 13, 2022 @08:55AM (#30660833)
Assuming you're not joking, this is the library Grant built (and released open source).
Re:Manim – Python library for creating mathematical animations by smoe on Sunday March 13, 2022 @09:01AM (#30660866)
To nitpick a bit, manim.community is a fork of the library he built. This is the original:

https://github.com/3b1b/manim

From the the READE:

"Note, there are two versions of manim. This repository began as a personal project by the author of 3Blue1Brown for the purpose of animating those videos, with video-specific code available here. In 2020 a group of developers forked it into what is now the community edition, with a goal of being more stable, better tested, quicker to respond to community contributions, and all around friendlier to get started with. See this page for more details."

Re:Manim – Python library for creating mathematical animations by detaro on Sunday March 13, 2022 @09:02AM (#30660874)
specifically it's a community variant of it. Grant still has his own version (https://github.com/3b1b/manim) where he works independently, and the community fork builds off that and e.g. adds and maintains things Grant might not care about.
Re:Manim – Python library for creating mathematical animations by adenozine on Sunday March 13, 2022 @08:54AM (#30660823)
It’s this.