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john_carmack.md

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+# John Carmack
+
+John Carmack is a brilliant legendary programmer that's contributed mostly to [computer graphics](graphics.md) and stands behind engines of such [game](game.md)s as [Doom](doom.md), [Wolfenstein](wolf3D.md) and [Quake](quake.md). He helped pioneer real-time 3D graphics, created many hacks and [algorithm](algorithm.md)s (e.g. the reverse shadow volume algorithm). He is also a rocket engineer.
+
+Carmack is a proponent of [FOSS](foss.md) and has released his old game engines as such which gave rise to an enormous amount of modifications, forked engines and even new games (e.g. [Freedoom](freedoom.md) and [Xonotic](xonotic.md)). He's probably leaning more towards the dark side of the source: the [open-source](open_source.md). In 2021 Carmack tweeted that he would have rather licensed his old Id engines under a permissive BSD [license](license.md) than the [GPL](gpl.md), which is good.
+
+In 2013 he sadly sold his soul to [Facebook](facebook.md) to work on [VR](vr.md) (in a Facebook owned company Oculus).

people.md

@@ -6,6 +6,7 @@ This is a list of notable people in technology.
 - **[Dennis Ritchie](dennis_ritchie)**: creator of [C](c.md) language and co-creator of [Unix](unix.md)
 - **[Donald Knuth](knuth.md)**: computer scientist, Turing-award winner, author of the famous [Art of Computer Programming](taocp.md) books and the [TeX](tex.md) typesetting system
 - **[Eric S. Raymond](esr.md)**: proponent of [open source](open_source.md), co-founder of [OSI](osi.md) and tech writer
+- **[John Carmack](john_carmack.md)**: legendary game ([Doom](doom.md), [Quake](quake.md), ...) and [graphics](graphics.md) developer
 - **[Ken Thompson](ken_thompson.md)**: co-creator of [Unix](unix.md), [C](c.md) and [Go](go.md)
 - **[Larry Wall](larry_wall.md)**: creator of [Perl](perl.md) language, linguist
 - **[Linus Torvalds](linus_torvalds.md)**: Finnish programmer who created [Linux](linux.md) and [git](git.md)