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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
631•klaussilveira•12h ago•187 comments

Start all of your commands with a comma

https://rhodesmill.org/brandon/2009/commands-with-comma/
19•theblazehen•2d ago•2 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
930•xnx•18h ago•547 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
34•helloplanets•4d ago•26 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
110•matheusalmeida•1d ago•28 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
43•videotopia•4d ago•1 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
10•kaonwarb•3d ago•10 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
222•isitcontent•13h ago•25 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
213•dmpetrov•13h ago•103 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
323•vecti•15h ago•142 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
372•ostacke•19h ago•94 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
359•aktau•19h ago•181 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
478•todsacerdoti•21h ago•234 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
275•eljojo•15h ago•164 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
404•lstoll•19h ago•273 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
85•quibono•4d ago•21 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
25•romes•4d ago•3 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
56•kmm•5d ago•3 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
16•jesperordrup•3h ago•9 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
245•i5heu•16h ago•189 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
13•bikenaga•3d ago•2 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
53•gfortaine•10h ago•22 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
141•vmatsiiako•18h ago•64 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
281•surprisetalk•3d ago•37 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1060•cdrnsf•22h ago•435 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
133•SerCe•9h ago•118 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
177•limoce•3d ago•96 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
70•phreda4•12h ago•14 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
28•gmays•8h ago•11 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
63•rescrv•20h ago•23 comments
Open in hackernews

How big can I print my image?

https://maurycyz.com/misc/printing/
61•LorenDB•6mo ago

Comments

aaronbrethorst•6mo ago
tl;dr:

    Viewing distance PPI
    1 meter          170 pixels/inch
which is to say that a 12mp image is going to max out at 18x24"
alwa•6mo ago
…supposing the pixels are the limiting factor, and that you’re interested in viewing an 18x24” image from 3 feet away.

If the optics that captured the image are such that its sharpest feature spans multiple pixels, TFA provides some handy rules of thumb to adjust your print size down accordingly.

dsign•6mo ago
Half-in-jest, I think we should put some pressure on the International Bureau of Weights and Measures to standardize dots per meter (DPM), and then have the EU follow through with a new law or two to accelerate adoption.
ggm•6mo ago
Yes, the meter/inch thing is jarring.

Angular measure only has degrees. We should be fine with angles subjected to a point, unless somebody decided fractions beat decimals.

throw0101c•6mo ago
> Angular measure only has degrees.

The SI unit for angular measure is radians:

* https://en.wikipedia.org/wiki/Radian

Also:

* https://en.wikipedia.org/wiki/Angle#Units

Eisenstein•6mo ago
"Zoom into this image so that the width of each vertical line is 1 mm or the whole image is 3.2 inches wide."

Is it possible to pick one system? Also, "3.2 inches" is difficult to measure. Rulers that measure in less than an inch use fractions, not decimals. It usually goes by 1/8ths, then 1/4 and 1/2, but some rulers have 1/16ths. 3/16" is .187 inches which is pretty close I guess.

funac•6mo ago
> "Zoom into this image so that the width of each vertical line is 1 mm or the whole image is 3.2 inches wide." > > Is it possible to pick one system? Also, "3.2 inches" is difficult to measure. Rulers that measure in less than an inch use fractions, not decimals. It usually goes by 1/8ths, then 1/4 and 1/2, but some rulers have 1/16ths. 3/16" is .187 inches which is pretty close I guess.

decimal inch rulers (& tape measures) are available; i have several. imo they're much more useful than fractional rulers in the context of machining, where the natural base unit, if you're not in metric, is 0.001” ('one thou')

perching_aix•6mo ago
Unfortunately printers print in dots though, not pixels. There are printers with variable dot sizes, supposedly a thing with professional print, I wouldn't know - but nominally a dot is gonna be one of the four ink colors (cyan, magenta, yellow, black) and then it's either present or not present. I'm sure someone who didn't sleep only just one hour overnight can calculate you how many dots you need to cover the same gamut as a typical 24 bit SDR RGB pixel will.
jjcob•6mo ago
24?
pointlessone•6mo ago
8 bits per channel. 8 * 3 = 24
MrSkelter•6mo ago
Good luck printing anything at 870dpi.

This whole article is a bit confused. Image quality isn’t about the ability to discern detail. Many people cannot see the detail in their 4k TVs or a photo, it’s about not seeing visible pixelation.

Those aren’t the same thing. Visible pixelation is connected to contrast and color depth. That’s why a perfectly smooth gradient appears as bands of color in poorly encoded images and video. There’s no detail in gradients at all. The pixelation is due to a lack of color information.

On top of that printers use different numbers of colors (from 3 to 11 or more) and different ways of sizing and layering dots (if you aren’t using continuous tone printers which are very rare nowadays).

Then you have to add in the ability to up res images plausibly using modern algorithms. Whereas before we were always stretching the data we had, now by adding false detail using ML we can scale a significant amount without a visible reduction in quality. That can be very effective at removing pixelation while preserving the original image content.

So in reality there aren’t hard and fast rules. It’s totally image and output dependent.