https://media.ccc.de/v/mch2022-236-non-euclidean-doom-what-happens-to-a-game-when-pi-is-not-3-14159- media.ccc.de logo, a lucky cat holding a play icon News RSS, last 100 Podcast feed of the last two years SD quality Podcast audio feed of the last year Podcast archive feed, everything older than two years SD quality Podcast feeds for MCH2022 mp4 SD quality mp3 opus webm SD quality [ ] News RSS, last 100 Podcast feed of the last two years SD quality Podcast audio feed of the last year Podcast archive feed, everything older than two years SD quality Podcast feeds for MCH2022 mp4 SD quality mp3 opus webm SD quality 1. browse 2. conferences 3. camp-NL 4. mch2022 5. event conference logo Non-Euclidean Doom: what happens to a game when pi is not 3.14159... Luke Gotszling MCH2022 Curated content Playlists: 'MCH2022' videos starting here / audio * 19 min * 2022-07-23 * 2022-07-24 * 45295 * Fahrplan We all know that the value of pi is a constant with a particular immutable value. Anyone who has done any graphical programming also knows that visual rendering relies not just on pi but trigonometry more broadly as well as other mathematical techniques. If we look into the source code of the first person shooter Doom we find that the value of pi used in the game is wrong. In this talk I will explore what happens when we subtly and not so subtly break math in the source. Doom is a well known classic first person shooter game with source code released under the GPL in 1999. In this talk I will begin by exploring what happens to the game when we make the value of pi even more wrong. What about when we change other trigonometric functions and constants to incorrect values? How will our familiar understanding and ability to traverse this virtual world change when we do this. Are there any interesting gaming possibilities with non-Euclidean geometries? A brief segway will cover some optimization tricks made to enable the game to run well on hardware available at the time. At the end I will provide a link to other games and public source code repositories that also use an incorrect value of pi. Pointers will also be provided to allow the audience to compile their own incorrect math version of the game. Download Video * MP4 * WebM Download 1080p eng 203 MB Download 576p eng 60 MB Download 1080p eng 187 MB Download 576p eng 59 MB Audio Download mp3 eng 17 MB Download opus eng 12 MB Embed [