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Waltteri

@waltteri.net

320 followers 460 following 450 posts

Finished a MSc in CS at University of Helsinki 🎉 Senior SWE at Cactos, battery energy storage systems. Previously Senior SWE at Garden, SRE at Webflow. Recreational computer graphics, Rust, photography, cycling. He/him. Mastodon (Twitter) @anotherwalther

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Waltteri @waltteri.net · Dec 29

Hero Wavelength Spectral Sampling successfully implemented! 🎉

Both: 4 samples per pixel
Left: one wavelength per ray
Right: four wavelengths per ray

With only a modest increase in runtime duration, the image becomes much smoother. This is more efficient than just adding more samples per pixel!

"happy buddha" test object rendered in a grey material in a room with a checkerboard pattern. before: quite a lot of color noise, after: fairly even colors

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derek guy @dieworkwear.bsky.social · 1h

This two-parter below is exactly why it's hard to make clothes in the United States.

Let's look at how much it costs to produce a button-up shirt in the US. 🧵

Someone on Twitter replies to me: "meh. buy american or stfu."

Two hours later, in a separate thread, the write: "$30 for a single button-up is ridiculous unless it is decent quality silk."

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Jerry Chen @jcsalterego.bsky.social · 1d

(forgetting the word for antibiotics) do i need cancel culture

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lena @lenazun.bsky.social · 1d

it can’t be good for our fragile brains to be asking “is this real?” at everything we see

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Aria Winningson @aria.labeledrude.online · 1d

getting reticulated must feel so good if you're a spline

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Steve Klabnik @steveklabnik.com · 2d

#rustlang PSA: you probably don't want #[allow(dead_code)], you probably want #[expect(unused)]

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Emilius Duckberry @emiliusdraws.bsky.social · 1d

#3119 Blobster

A digital drawing of a very round and blobby lobster.

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a wicked and unusual boy @myrrlyn.net · 2d

“steel” isn’t the name of a metal it’s the label we slap on “this alloy has iron in it and also is pretty good”. whatever alloy of iron you have that is pretty good just becomes the new kind of steel

Doc Vivi Leandra - Real-Life Scientist VTuber 🧬🖥️ @docvivileandra.bsky.social · 2d

Every sci-fi author tries to come up with a material "more advanced" than steel, as if steel is a single material with a single set of properties and not, like, hundreds of different materials that we are still advancing and improving

The more advanced equivalent of steel is just better steel lol

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Waltteri @waltteri.net · 2d

On a similar note, I've often joked that Tron: Legacy is a great feature-length music video

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Hoffman @h0ffman.bsky.social · 2d

A very special #MODtober today. This is what happens when you don't have a soundchip. ZX Spectrum Beeper tune made in 1tracker. Check the youtube for more details and why it was a unique challenge to capture this one.

www.youtube.com/watch?v=VHmr...

h0ffman - 1-Bit High and Rising (ZX Spectrum Beeper)

YouTube video by Hoffman

www.youtube.com

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Robin-Yann Storm @rystorm.com · 2d

You will not remember that piece of dirty clothing until you have already started the washing machine. Somehow, humans can't see issues until something has started, so account for that in your tools.

So always make sure a user can undo an action, like Gmail does with email send timers.

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Steve Klabnik @steveklabnik.com · 3d

this is a thing i've been thinking about for a while

i do think that open source work is valuable. it's just not all roses, and the "yeah let's all do this!" energy of ten years ago hit the reality of this at some point

fallthrough @fallthrough.fm · 3d

@steveklabnik.com thinks bringing new people into open source is like feeding cats to coyotes. What do you think? 🤔

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Anzo @anzowo.bsky.social · Sep 1

Last but not least, the much beloved Baba from @hempuli.bsky.social. We love this little guy so much you have no idea. Most of these but [[Giant Growth]] are completely custom cards with custom oracle's. (The Mobile Suit Baba might be a *bit* too good)

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Baba Is You @babaisyou.bsky.social · 3d

Fox has been added into the game, and with this we're about ready to upload the new build for betatesting!
#babaisyou

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Waltteri @waltteri.net · 3d

We are talking a bit past each other, sorry! 🧡

I know about the Windows-specific screenshot issue. My comment was meant as a more of a "yes and" type, there are a bunch of other papercuts out there as well

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Waltteri @waltteri.net · 4d

sadly even on mac, compare between safari, firefox, etc

(optionally repeat on ios, windows, etc - some get some parts right, others get the others)

www.wide-gamut.com/test

Wide Gamut - Test Page

www.wide-gamut.com

Waltteri @waltteri.net · 4d

yeah i get it

unfortunately the standards are bad, the device manufacturers are implementing them worse, and the cross-compatibility between various pieces of software and operating systems is the worst

you can eg make a sad table of browser vs OS and which bits are supported in which combinations

Waltteri @waltteri.net · 4d

HDR is such a miserable pile of jank :(

Reposted by Waltteri

AapoAlas @aapoalas.trynova.dev · 4d

Hey #JavaScript / #TypeScript hive-mind: are you aware of any high-performance, memory-efficient directed acyclic graph libraries?

I'm going to embark on a quest to write a TypedArray Struct-of-Arrays based DAG for a specific use case, and I'm pondering if any prior art exists already.

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Matt Serwe @serwewx.bsky.social · 4d

Be loving.
Be caring.
Be kind.
Be generous.
Be empathetic.

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conputer dipshit @davidcrespo.bsky.social · 10d

just realized the dril drunk driving tweet also works for regular driving

wint @dril
drunk driving may kill a lot of people, but it also helps a lot of people get to work on time, so, it;s impossible to say if its bad or not,

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Waltteri @waltteri.net · 4d

oooh nice, congrats!

every now and then i've been idly thinking about getting a plotter. i probably shouldn't. but it could be fun! but probably not very useful. but fun? hmmh.

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Kommander Karl @kommanderkarl.bsky.social · 6d

AI still can’t do this

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Pavel @spavel.bsky.social · 5d

Flying cars are the perfect example of a point solution: trying to solve a systemic problem (traffic) with an individual product (fly over the traffic).

But traffic is not a technology problem; it's a social problem. Remote work, congestion fees, and dense transit-connected housing solve it better.

ae @aelkus.bsky.social · 5d

which then begs the question of why you want flying cars instead of whatever mass transportation equivalent you imagine

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Steve Klabnik @steveklabnik.com · 5d

I think "handle" is the right name here, I actually came up with it independently but didn't want to wade into the discourse about it smallcultfollowing.com/babysteps/bl...

The Handle trait · baby steps

smallcultfollowing.com

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Julia Evans @b0rk.jvns.ca · 5d

redirects

wizardzines.com/comics/termi...

(from "The Secret Rules of the Terminal", out now! wizardzines.com/zines/termin...)

redirect to a file:

cmd > file.txt terminal emulator into program, program out to file.txt, error out to terminal emulator
append to a file:

cmd >> file.txt terminal emulator into program, program out to file.txt (append mode), error out to terminal emulator
send a file to stdin:

cmd < file.txt file.txt into program, program out and err to terminal emulator
redirect stderr to a file:

cmd 2 > file.txt terminal emulator into program, program out to nowhere, err out to file.txt
redirect stdout AND stderr:

cmd > file.txt 2>&1 terminal emulator into program, out and err to file.txt
pipe stdout:

cmd1 | cmd2 terminal emulator into program 1, 1 out to program 2 via pipe, 2 out to command line, program 2 out 1 and 2 to terminal emulator
pipe stdout AND stderr:

cmd1 2>&1 | cmd2 terminal emulator into program 1, 1 and 2 out to program 2 via pipe, program 2 out 1 and 2 to terminal emulator
three gotchas

cmd file.txt > file.txt will delete the contents of file.txt some people use set -o noclobber (in bash/zsh) to avoid this

but I just have “never read from redirect to the same file” seared into my memory.

sudo echo blah > /root/file.txt doesn’t write to /root/file.txt as root. Instead, do:

echo blah | sudo tee /root/file.txt or sudo sh -c 'echo blah > /root/file.txt'

cmd 2>&1 > file.txt doesn’t write both stdout and stderr to file.txt. Instead, do: cmd > file.txt 2>&1

cat vs <

I almost always prefer to do:

cat file.txt | cmd

instead of

cmd < file.txt

it works fine & it feels better to me

using cat can be slower if if’s a GIANT file though
&> and &|

some shells support &> and &| to redirect/pipe both stdout and stderr

(also some shells use |& instead of &|)

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