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おいもログ
Personal blog · blog.oimo.ioprogramminggames
おいもログ is a personal blog at blog.oimo.io about programming and games. Since 2022, 14 different Hacker News readers have linked it 18 times, most often “Life Universe: A Technical Explanation”. It is still writing: the last post was on 2025-11-22, and you can follow it by feed.
Too few sampled comments (13) to say how often HN recommends it.?
Why HN links it
HN readers link this Japanese blog for explainers of how its simulations work, especially the Game of Life Universe with OTCA metapixels, plus posts on spatial hashing, clock physics and AI-versus-human eyes.
Summarised by Claude from a sample of 13 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Most-linked posts?
- Life Universe: A Technical Explanation7 people · 9 mentions · first linked 2023-04-19
- /2022/02/11/clock-core/2 people · 2 mentions · first linked 2023-04-19
What Hacker News says?
Yes, this is inconsistent. When you zoom in 10 levels and then zoom out 10 levels again, pretty much all cells you see will be dead. But if you continue to zoom out further than 10 levels, you will see some mix of live and dead cells again. Zooming in is easily defined: when you zoom into an on-state OTCA metapixel, you can check which pixels that make up the metapixel are on and which are off [1]. Same deal for zoo…
Comment linking /2023/04/10/life-universe-en/
on “Game of Life, simulating itself, infinitely zoomable”Submitted AHC056 Participation Record and Explanation of First Place Solution as a story · 1 points
HN discussionInterestingly, the author's blog post [1] mentions that this is due to technical limitations and not specifically done by choice, although I do like the effect. > When we zoom in, we discard the information of the largest meta-metapixel, so it is not always possible to reconstruct the same scene when we zoom out again. > Since zooming in and out can be continued indefinitely, we also realize that we need infinite in…
Comment linking /2023/04/10/life-universe-en/
on “Game of Life, simulating itself, infinitely zoomable”Submitted Drops as a story · 1 points
HN discussionThere's a seriously incredible article on the guy's site where he explains how it works! It's very much worth a read, really cool stuff. https://blog.oimo.io/2023/04/10/life-universe-en/
Comment linking /2023/04/10/life-universe-en/
on “Game of Life, simulating itself, infinitely zoomable”Submitted Combining Position Based Dynamics and Substepping as a story · 1 points
HN discussionAnd by the author of this version: https://blog.oimo.io/2023/04/10/life-universe-en/
Comment linking /2023/04/10/life-universe-en/
on “Game of Life, simulating itself, infinitely zoomable”Submitted Life Universe: A Technical Explanation as a story · 1 points
HN discussionhttps://blog.oimo.io/2022/02/11/clock-core/
Comment linking /2022/02/11/clock-core/
on “Show HN: Time Flies”https://blog.oimo.io/2022/10/21/human-or-ai-walkthrough/ This is a blog that investigates ai eyes and particular and how to distinguish them from human artist made eyes. *However, in the case of AI painting, it will almost certainly change the coloring of the left and right eyes and how to add highlights . Humans can understand that ``the left and right eyes have the same physical shape and are placed in the same si…
Comment linking /2022/10/21/human-or-ai-walkthrough/
on “Good Old Fashioned AI is dead, long live New-Fangled AI”the Conway's Game of Life Universe explained here, this one is deadly cool! > https://blog.oimo.io/2023/04/10/life-universe/
Comment linking /2023/04/10/life-universe/
on “Water”The explainer is here: https://blog.oimo.io/2023/04/10/life-universe-en/
Comment linking /2023/04/10/life-universe-en/
on “Water”This person used HashLife and OTCA metapixel (+ magic/genius) to create an infinite canvas of life within life. https://blog.oimo.io/2023/04/10/life-universe-en/ https://conwaylife.com/wiki/OTCA_metapixel
Comment linking /2023/04/10/life-universe-en/
on “HashLife – A memoized algorithm for Conway's Game of Life and cellular automata”One the topic of Game of Life, this is one of the coolest things I've ever seen: https://oimo.io/works/life/ The blog post that explains it is truly mind-blowing stuff. https://blog.oimo.io/2023/04/10/life-universe-en/
Comment linking /2023/04/10/life-universe-en/
on “Show HN: Conway's Game of Life, but with a gallery of other peoples patterns”How to use: - Click on the sphere and drag towards the cloth. - Click at any place and drag for wind. Author's blog article (Japanese) https://blog.oimo.io/2021/06/17/spatial-hashing/ > Fast collision detection with Spatial Hashing compressing the empty lattice it is an idea he came up with.
Comment linking /2021/06/17/spatial-hashing/
on “Cloth Simulation”The core idea (backwards time integration) seems to be implemented here: https://github.com/saharan/works/blob/main/clock/src/phys/Wo... And by the looks of it, there is a description here: https://blog.oimo.io/2022/02/11/clock-core/ I'm not passionate enough to try and (machine-)translate it, even though I would've really liked to understand how you make collision handling work backwards (especially since the simul…
Comment linking /2022/02/11/clock-core/
on “Clock”The copy contains a copy which also contains a copy (when highlighted). Expectable from the author of the recursive Life Universe https://blog.oimo.io/2023/04/10/life-universe-en/
Comment linking /2023/04/10/life-universe-en/
on “Clock”Explanation on how it works: https://blog.oimo.io/2023/04/10/life-universe-en/
Comment linking /2023/04/10/life-universe-en/
on “Clock”
