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Filip Hracek

@filiph@mastodon.social
mastodon 4.8.0-nightly.2026-10-06
  • Open on mastodon.social

I’m a pro­gram­ming buff with formal train­ing in jour­nal­ism. I worked in Sili­con Valley, now I’m based in Prague.

I build games, teach pro­gram­ming, explain things, and create silly soft­ware experiments.

0 Followers
0 Following
33 Posts
Joined August 27, 2018
Homepage:
https://filiph.net
Twitter:
https://twitter.com/filiphracek
Egamebook:
https://egamebook.com
Giant Robot Game:
https://giantrobotgame.com
Open post
Filip Hracek @filiph@mastodon.social
· 5mo ago
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Open post
Filip Hracek @filiph@mastodon.social
· 2mo ago

Very happy about this feedback for GIANT ROBOT GAME playtest. I mean, my game is mostly 2D, which helps, but in the age of "let's just build it in ", it's heartening to see.

#indiedev #gamedev

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Open post
Filip Hracek @filiph@mastodon.social
· 2mo ago

New GIANT ROBOT GAME update:

- Add intercept behavior to AI (enemies will try to anticipate your move instead of simply dragging behind you; this eliminates a degenerative strategy of "just keep running away")
- Add ballistics to projectiles (shots now realistically fly with a ballistic curve, hit terrain in front of the target, etc.). They also spawn particles when hitting the ground.
- Fix chassis counting bug at the end of a run

https://store.steampowered.com/news/app/3041590/view/692016318956701261

#gamedev #mecha

Site Error
store.steampowered.com

Site Error

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Open post
Filip Hracek @filiph@mastodon.social
· 2mo ago

New quick blogpost about something that grinds my gears in Chrome:

https://filiph.net/text/choppy-progress-in-chrome.html

Just realized that you, @paul@status.kinlan.me, could have some insight on this?

#webdev

Why is <progress> so choppy in Chrome?
filiph.net

Why is <progress> so choppy in Chrome?

The HTML progress element, and how it looks in various browsers in 2026.

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Open post
Filip Hracek @filiph@mastodon.social
· 3mo ago

I use kagi.com for search these days but today, I got a report from Google Search Console about my filiph.net website, so I decided to search for filiph.net on Google, and it's just bizarre: searching for "filiph.net" returns _anything but_ filiph.net.

These are called navigational queries (when you're searching for the url instead of putting it into the browser URL bar) and they're super common (often top queries).

I checked and filiph.net has no problems in the Google Search Console. WTF?

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Open post
Filip Hracek @filiph@mastodon.social
· 2mo ago

As always, great information from Our World in Data:

https://ourworldindata.org/how-much-energy-do-data-centers-and-artificial-intelligence-use

My opinion:

- using LLMs for simple queries that you could just find yourself in a few seconds is way too inefficient
- using LLMs for "fun" (through things like AI dungeon) is hopefully a short-lived gimmick and will die soon - because it gobbles energy like crazy
- using LLMs to do actual useful work is not that bad, imho. If you build a useful thing and it costs as much as watching TV for a day, then that's fine?

Our World in Data

How much energy do data centers and artificial intelligence use?

Data centers consume around 1.5% of global electricity, but demand is very geographically concentrated.

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Open post
Filip Hracek @filiph@mastodon.social
· 3mo ago

New blogpost!
https://filiph.net/text/to-make-money-be-useful-to-rich-people.html

If you want to make money, be useful to rich people
filiph.net

If you want to make money, be useful to rich people

A piece of advice that is also a (somewhat sad) statement of fact

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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago

RE: https://www.threads.com/@mkbhd/post/DWUVtSiDqMu

This wouldn't be Mastodon if people didn't immediately mention Linux. And I think there's a point to it. Apple is on a roll. Meanwhile, Microsoft is shooting its feet seemingly every other month with "AI button this" and "everyone must subscribe that".

For a lot of folks, the answer to the Mac vs Win conundrum will be Linux. There's more polish on Linux now than ever before, it's ARM-ready, there's gaming, and the business model stays away from lock-in and force-feeding of features like AI.

threads.com
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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago
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Filip Hracek @filiph@mastodon.social
· 6mo ago

New blogpost! Also, an invitation to a talk I will be giving next month (only in Czech and offline but still).

https://filiph.net/text/philosophical-underpinnings-of-my-giant-mecha-game.html

#gamedev #indiedev

filiph.net
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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago

Jestli to dobře chápu, tak Škoda Elroq je nejprodávanější auto v Dánsku za březen (a druhé nejprodávanější za Q1). To se mi líbí!

Zdroj: https://x.com/Arpe_DK/status/2039226343016091678 (náhodný fanoušek Tesly na Twitteru) via Michal Illich tamtéž

#czech

Arpe (@Arpe_DK) on X
X (formerly Twitter)

Arpe (@Arpe_DK) on X

Car sales in Denmark March and Q1. Danish media does not want to show you March sales so someone else have too 😅

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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago

A player named voxkiddo made this banger of a vid. It puts in-game hints next to their usage in practice. I couldn't be happier — it's probably better at communicating the game's depth than any of the trailers I've put out myself.

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Open post
Filip Hracek @filiph@mastodon.social
· 7mo ago
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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago

RE: https://mastodon.social/@ZachWeinersmith/116374140693986165

Great use of LLMs!

Mastodon

Zach Weinersmith (@ZachWeinersmith@mastodon.social)

Five more Erdos problems solved by AI (with minor human assistance on one of them): https://arxiv.org/abs/2604.06609

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Open post
Filip Hracek @filiph@mastodon.social
· 2mo ago

Good news, everyone! I've put my trusted old `are_we_there_yet.sh` script on the web. Some Flutter folks might find it useful:

https://filiph.net/text/are-we-there-yet.html

#flutter

Are we there yet?
filiph.net

Are we there yet?

Find out if your favorite feature have made it to the latest Flutter SDK

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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago

RE: https://mastodon.social/@hanse_mina/116344005996102032

I wrote a bit about this: https://filiph.net/text/why-usa-supports-orban.html

Mastodon

Hanse Mina (@hanse_mina@mastodon.social)

Operation Save Orbán: Trump deploys Vance to Hungary. U.S. President Donald Trump gives a final heave to try and keep under-pressure Prime Minister Viktor Orbán in power. https://www.politico.eu/article/operation-save-viktor-orban-us-donald-trump-deploys-jd-vance-hungary/ #Ukraine #Russia #US #EU #Hungary #Trump #Orban #Vance

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Open post
Filip Hracek @filiph@mastodon.social
· 7mo ago

New blogpost!

https://filiph.net/text/bad-game-good-times.html

filiph.net
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Open post
Filip Hracek @filiph@mastodon.social
· 7mo ago
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Filip Hracek @filiph@mastodon.social
· 3mo ago

Ah, this is eye-opening:

> John Cage never stopped foraging for rare mushrooms and truffles - what was once his primary skill for sustenance during the Great Depression had transformed into his main source of income well into the peak of his musical career. [...] Michelin Star restaurants in Manhattan paid top dollar for Cage’s [truffles], enough to make sure he could spend the majority of his time composing and writing.

https://klangmag.co/lifers-dayjobbers-and-the-independently-wealthy-a-letter-to-a-former-student/

Lifers, Dayjobbers, and the Independently Wealthy: A Letter to a Former Student
Klang Magazine

Lifers, Dayjobbers, and the Independently Wealthy: A Letter to a Former Student

Written by Max Alper Last year, a private student of mine had gotten in touch with me via email at around 3 AM. I had known this student for years prior, as they were in one of the earliest college courses I ever taught when they were an undergraduate at

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Open post
Filip Hracek @filiph@mastodon.social
· 9mo ago

RE: https://techhub.social/@year_progress/115837658902766028

No pressure but the year 2026 is already 1% done

techhub.social
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Open post
Filip Hracek @filiph@mastodon.social
· 7mo ago
Replying to
TIL about https://en.wikipedia.org/wiki/Schistosomiasis
Schistosomiasis - Wikipedia
en.wikipedia.org

Schistosomiasis - Wikipedia

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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago

Fun article about the wild west days of Windows 3.1 and Win95 installers.

https://devblogs.microsoft.com/oldnewthing/20260324-00/?p=112159

Windows 95 defenses against installers that overwrite a file with an older version - The Old New Thing
The Old New Thing

Windows 95 defenses against installers that overwrite a file with an older version - The Old New Thing

A very primitive version of recovery.

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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago

Here's a bit about countering casual science denialism. Nothing world-shattering, just wanted to have this written down and published.

https://filiph.net/text/toxic-plus-explosive-equals-salt.html

#science

Nobody owes it to us for things to be obvious
filiph.net

Nobody owes it to us for things to be obvious

The simple, helpful counter-argument to 'common sense' casual science denialism.

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Open post
Filip Hracek @filiph@mastodon.social
· 7mo ago
Replying to
@tomucha That article is really interesting, btw. Turns out 94% of fatalities involved dogs (the dog appeared threatening to the cow (it's a predator), the cow attacked, the owner tried to protect the dog, the cow killed them).
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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago

New blog!

https://filiph.net/text/supernormal-stimulus.html

Supernormal stimulus
filiph.net

Supernormal stimulus

A concept I wish I had learned in high school.

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Open post
Filip Hracek @filiph@mastodon.social
· 7mo ago

I'm looking for ways to quickly mess with number constants inside the IDE (like in Bret Victor's famous talk). Any ideas?

Discussion: https://forum.itsallwidgets.com/t/interactive-slider-in-ide/4612

Interactive slider in IDE
Flutter Forum

Interactive slider in IDE

This feels like something that was probably covered elsewhere already, but my search-fu is clearly not strong enough. With Flutter’s hot reload, it would often be very helpful to be able to drag at a number in code, in my IDE, and change it gradually. This concept of changing code constants through UI interactions is quite common in “notebook” IDEs (like Jupyter Notebook and others) but it’s perhaps best know from Bret Victor’s now-classic Inventing on Principle tech demo. I was sure this i

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Open post
Filip Hracek @filiph@mastodon.social
· 11mo ago

RE: https://mastodon.social/@filiph/115411289257664000

New GIANT ROBOT GAME playtest version on Steam: https://store.steampowered.com/news/app/3041590/view/516350567072663981

It's close to the one I'm playing below. The one with radioactivity.

mastodon.social
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Open post
Filip Hracek @filiph@mastodon.social
· 44mo ago

I thought some of you might enjoy my tirade over on Twitter about their surprise plan to monetize hobby bots (like my @year_progress).

https://twitter.com/year_progress/status/1621525592616361984

I enjoyed the hell out of writing this.

twitter.com
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Open post
Filip Hracek @filiph@mastodon.social
· 6mo ago
Replying to
Lyrics
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Open post
Filip Hracek @filiph@mastodon.social
· 5mo ago
Replying to

@ZachWeinersmith Yeah! I've never noticed it but it checks out:

  • knights - not necessarily landed aristocrats with pledge to the crown
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