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

https://openciv3.org/
487•klaussilveira•7h ago•130 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
825•xnx•13h ago•495 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
48•matheusalmeida•1d ago•5 comments

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

https://github.com/valdanylchuk/breezydemo
163•isitcontent•8h ago•18 comments

A century of hair samples proves leaded gas ban worked

https://arstechnica.com/science/2026/02/a-century-of-hair-samples-proves-leaded-gas-ban-worked/
103•jnord•3d ago•14 comments

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

https://github.com/pydantic/monty
159•dmpetrov•8h ago•72 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
57•quibono•4d ago•9 comments

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

https://vecti.com
267•vecti•10h ago•126 comments

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

https://github.com/microsoft/litebox
334•aktau•14h ago•161 comments

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

https://eljojo.github.io/rememory/
216•eljojo•10h ago•136 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
329•ostacke•13h ago•87 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
31•kmm•4d ago•1 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
417•todsacerdoti•15h ago•220 comments

Show HN: ARM64 Android Dev Kit

https://github.com/denuoweb/ARM64-ADK
8•denuoweb•1d ago•0 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
8•romes•4d ago•1 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
349•lstoll•14h ago•245 comments

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

https://github.com/phreda4/r3
55•phreda4•7h ago•9 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
205•i5heu•10h ago•149 comments

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

https://infisical.com/blog/devops-to-solutions-engineering
117•vmatsiiako•12h ago•42 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
30•gfortaine•5h ago•4 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
155•limoce•3d ago•79 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
254•surprisetalk•3d ago•32 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/
1008•cdrnsf•17h ago•421 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
50•rescrv•15h ago•17 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...
11•gmays•3h ago•2 comments

I'm going to cure my girlfriend's brain tumor

https://andrewjrod.substack.com/p/im-going-to-cure-my-girlfriends-brain
82•ray__•4h ago•40 comments

Evaluating and mitigating the growing risk of LLM-discovered 0-days

https://red.anthropic.com/2026/zero-days/
41•lebovic•1d ago•12 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
78•antves•1d ago•59 comments

How virtual textures work

https://www.shlom.dev/articles/how-virtual-textures-really-work/
32•betamark•15h ago•28 comments

Show HN: Slack CLI for Agents

https://github.com/stablyai/agent-slack
41•nwparker•1d ago•11 comments
Open in hackernews

Animated Cursors

https://tattoy.sh/news/animated-cursors/
244•speckx•6mo ago

Comments

baq•6mo ago
This is way cooler than I expected.

It's an over-the-top animation of a terminal cursor moving from position to position, helps notice where it moved to. I thought it'll be something about mouse cursor animations. I could see myself using this if a) I was using more TUI apps and b) it'd be toned down quite a bit.

jasonjmcghee•6mo ago
I think was popularized by Neovide

https://neovide.dev/features.html#animated-cursor

nine_k•6mo ago
Here it's less dramatic and hence more useful.

I wish more terminals implemented something similar.

tombh•6mo ago
Author here, I just chose the fire cursor for the demo. There are lots of other shaders available, eg https://github.com/KroneCorylus/ghostty-shader-playground/tr..., they have a simple smear cursor like Neovide's.
nine_k•6mo ago
The fire is perfect for the demo, and for screencasts maybe.
throwanem•6mo ago
Strong second.
echelon•6mo ago
I never knew this was a thing.

This is so fucking cool. I'm going to add this right away.

microtonal•6mo ago
Kitty also supports them with the cursor_trail option: https://sw.kovidgoyal.net/kitty/conf/#opt-kitty.cursor_trail
thebeardisred•6mo ago
As a kitty user, I'll have to try this out.

Thanks!

Rendello•6mo ago
Reminds me of the old Compiz plugin that would make your windows burst into flames on closing.
andrepd•6mo ago
Compiz effects was truly the killer feature for Linux for 12 year old me :)
Rendello•6mo ago
14 year-old me set up Linux Mint with this LSD Conky display for my grandmother. I said something like "Well technically it's LSD but it looks cool so don't worry about it".

https://github.com/matmutant/LSD-Conky

eMPee584•6mo ago
in hindsight, I do regret not yet being able to supply my <3 grandma with a small dose, might have condoled her senseless fury (dementia rage or so).. RIP
ckrailo•6mo ago
If you'd like to scratch that itch... https://github.com/Schneegans/Burn-My-Windows
tombh•6mo ago
The home page has GIFs of both a simpler smear-fade cursor and a wilder manga-slash cursor https://tattoy.sh
rendaw•6mo ago
Where? I only see the fire one too.
ldjb•6mo ago
Under the Animated Cursors heading. Here are direct links to the webms if you still can't find them:

https://tattoy.sh/assets/screenshots/cursor_smear_fade.webm

https://tattoy.sh/assets/screenshots/manga_slash.webm

isoprophlex•6mo ago
Barely useable, pfff. Needs at least two out of three of

- airhorn and/or light saber sound effects,

- a sixel-based rendering of lens flares, or

- a fluid dynamics engine to simulate rippling of characters around the path along which the cursor moves

(Joke, looks very cool even though i'd probably find it too distracting)

Nevermark•6mo ago
> - airhorn and/or light saber sound effects,

I will take the light saber sounds.

With stereo-spacial transformation, so the sounds "direction" and "distance" match my own physical dynamic orientation relative to the cursor's motion on the screen.

And, the ability to open a small window, which gives me the cursor's visual point-of-view, as it zooms through the graphics on the screen.

Also, each traversed character should get "hot" as the curser goes over it, indicated with a stable glow for a quarter of a second, followed by an exponential fade over another second.

I think we can all agree that when in flow, functional distractions need to work harder, be more immersive, to be effective.

somat•6mo ago
Here you go.

https://ash-k.itch.io/textreme

0xFEE1DEAD•6mo ago
Testimonial:

> I've never been asked to pair up eversince I've started using tattoy

mholm•6mo ago
iTerm2 has a basic animated cursor that I like, just a frame or two long, and fairly subtle. It would be nice if it expanded to support this type of animation, I do wish it were a bit more visible (though not, perhaps, the EDM show presented)
knodi123•6mo ago
This (OP) project is inspired by neovide, a recent neovim gui. And iterm2's animated cursor is a brand new feature, also inspired by neovide.

Honestly, iterm2 is way too nice a piece of software considering the price. A real labor of love from a guy who apparently has lots more free time than me. :-)

renewiltord•6mo ago
This is pretty cool. Helps trace where the cursor is going. I prefer the Ghostty style now that I see it, but nonetheless cool UI feature.
pimlottc•6mo ago
I assumed this meant mouse cursors, so I was confused why the pointer didn’t move in the same video. Would have been better just to turn it off for the recording.
dangoodmanUT•6mo ago
i swear to god i can hear the laser sounds
kingforaday•6mo ago
I applaud this effort and think it is amazing graphically for a tty, but serious question: does anyone use this as their daily driver?
tombh•6mo ago
I'm the creator of Tattoy, so thanks. A significant part of the motivation for the project is that it's fun, like a "toy", as the name suggests. I do use it everyday, but only for one serious usecase, to allow my Twitch chatters to visually interact with my terminal by sending emotes to it. I'm not personally into the animated cursors, they were just easy to implement because I'd already built out support for Ghostty's background shaders.

But, if you want a truly serious usecase, then my pipe dream is that Tattoy becomes the "XWayland" for an entirely new protocol for terminals that explores moving on from ANSI codes, the terminfo database and so on. I wrote a blog post about this idea: https://tattoy.sh/news/an-end-to-terminal-ansi-codes

VTimofeenko•6mo ago
As in the cursor trailing to new position? I use it, albeit on a different emulator.

Greatly helps when demoing something from my terminal and having multiple splits open.

coldblues•6mo ago
Emacs has https://github.com/Malabarba/beacon
o11c•6mo ago
Honestly, just `:set cursorcolumn` is far more useful. Less distractions at the moment of change, but still visible if you alt-tab back.
ionwake•6mo ago
I installed it with homebrew but I dont see this shader tracer, I even see the blue pixel top right. Ive read the docs but it doesnt seem to explain if I need to do anything further which means it must be my already customised iterm which is the issue. Ill see if I can sort it.
tombh•6mo ago
The creator here, sounds like I need to improve the docs. Did you set `enabled = true` in the `[animated_cursors]` section of the config? If so, then this could be bug, and I'd be very grateful for a report in the repo's issues: https://github.com/tattoy-org/tattoy
ionwake•6mo ago
tbh im not sure what Im doing wrong, I already have a highly customised iterm window and have spent a hour with chatgpt trying to troubleshoot this to no avail... must just be my setup for some reason. I will let you know if I figure it out - thanks
Vlasar•6mo ago
Sorry if I’m missing something, but isn’t the homebrew version outdated?
tombh•6mo ago
Oh! You weren't missing anything, the automated Homebrew builds have been giving false positive successes since v0.1.3. I've updated it to v0.1.7 now. Thank you for mentioning this.
getflourish•6mo ago
Inspiring. So cool, yet useful.
incognito124•6mo ago
Love to see another atuin user
thanhhaimai•6mo ago
For a demo of the new Cursor feature in Ghostty: https://www.youtube.com/watch?v=enwDjM7pNNE
ipsum2•6mo ago
Wonder what this looks like in asciinema. Does it show up properly?

I wasn't able to get this working. MacOS, homebrew, added [animated_cursor] to the tattoy.toml and the glsl file.

tombh•6mo ago
It very much should work on asciinema, it's all pure text after all.

I'd very much appreciate a bug report. It looks like maybe Tattoy isn't connecting to the GPU on Mac: https://github.com/tattoy-org/tattoy/issues/129

magicalhippo•6mo ago
Looks very nice and fun, and potentially very useful. I was going to say I'd prefer a gradient effect to emulate motion blur, but stepping through the video I see you've already implemented something like that.

However, when making large moves, it seems a bit disorienting and the gradient effect seems very subtle in the video. Perhaps make the effect depend on distance, like actual motion blur would?

I was also thinking about having a color shift when moving up vs moving down, not sure about that one but certainly something I'd play with.

tombh•6mo ago
I think this is something that is quite actively being explored in the Ghostty community. And Tattoy automatically benefits from that because it supports the very same cursor shaders. You could check out the Ghostty Discord if you're interested. And of course you can experiment with your own cursor shaders, they follow the same syntax as Shader Toy: https://tattoy.sh/docs/shaders
eviks•6mo ago
Have you ever lost track of the cursor to require a trail? (and if yes, what shape/color was the cursor)
iforgotpassword•6mo ago
Yes, happens occasionally. I just wiggle it left/right or up/down so I can see where it is. No big deal. But put of curiosity I might still try that one day, with a more subtle effect though. ;)
eviks•6mo ago
What's the shape/color? I guess, non-blinking?

(they have other effects, check effects in neovide for better defaults)

bombela•6mo ago
This looks cool. I am a bit off topic here. But my only fear is this entices some people to make it the default in terminals over time.

Like all moderne UIs now have animations, ranging from very slow to barely fast enough for my personal perception.

And it becomes increasingly hard to disable those animations. They creep up absolutely everywhere. And they drive me crazy. I want my computer to act instantaneously. Redraw within 8ms.

Almost all animations are also impossible to abort or skip. Worse plenty will animate concurrently. So you might be jumping around on a webpage faster than the animation, which then jumps you back to then slowly animate.

My life on this planet is finite. A computer isstupidly fast. Why waste my precious lifetime? How many minute of life do developers of animations steal from people?

I do understand that I process visual stimulus faster than most people. Making me an outlier. Modern interfaces are devoided of identifiable buttons and all look like a smear of emptiness with a few dollops of text and burger icons to interact with. Making it hard to notice what changed between two actions. Maybe increasing the need for animations to help people follow

In any case, I suffer greatly with animations.

radicality•6mo ago
On Mac, I recently mistakenly held Shift (or some other key combo?), before hitting Space to open QuickLook as I was gonna select a few image files. It proceeded to open quicklook with an incredibly slow >5s animation, very annoying :S
__MatrixMan__•6mo ago
I've not heard of tattoy but I'm glad I ran across it. Most of its usage is not to my taste, but it appears to scratch an itch I've had for some time. I've been chewing on this idea for a... terminal emulator? shell? editor plugin?... something where you could annotate an error message with something like:

> This is fixed in the next release, nothing to see here

or

> I think think one is actually a problem, see issue 1657

And then your coworkers could view the logs in some way (special terminal emulator? piped through some kind of filter? idk) and your annotations would appear in a column next to the logs, perhaps with some background coloring to indicate which annotation goes with which log message. This way you don't all duplicate the effort of deciding whether this particular error is worth worrying about--instead you'd leave notes right there on the error (anchored via context triggered piecewise hashes).

The tattoy protocol seems like it be a good way to apply the highlighting on the logs whenever one that has a matching annotation appears on screen (https://tattoy.sh/docs/plugins/).

tombh•6mo ago
This is exactly the kind of creative thinking I want Tattoy to both inspire and make easy to implement.
DiggyJohnson•6mo ago
That would actually be cool. We have a couple issue patterns with the interface between front and backend that leads to our frontend guys always misinterpreting the reason their API call are failing. Wound be cool to annotate “this error message is usually caused by another error message in <this controller>. Please check for this before assuming…”
__MatrixMan__•6mo ago
It's part of a bigger vision, a sort of general-purpose digital spraypaint, where you don't need write access to the data in order to annotate it and we use patterns in the data itself to index the annotations such that you can direct any bitstream into the app and ask:

> do any of my peers have annotations on any of this?

But I think the way to get there is to make a variety of purpose built apps which all follow the same pattern, and I figure annotations on logs is one of the first ones I'll do. It has been slow going though, holidays and weekends, so it'll be a while.

DiggyJohnson•6mo ago
Best of luck! I know how hard it can be to find time and energy for these sorts of projects, but this is cool
Animats•6mo ago
Comet Cursor! [1]

[1] https://en.wikipedia.org/wiki/Comet_Cursor