Hacker News

The trackball that merges pointing and 3D control

Hacker News - Thu, 03/05/2026 - 8:25am

Article URL: https://rotatrix.com

Comments URL: https://news.ycombinator.com/item?id=47261324

Points: 1

# Comments: 0

Categories: Hacker News

Show HN: VideoNinja – paste video URLs, walk away, they download

Hacker News - Thu, 03/05/2026 - 8:24am

Another evening of saving videos before platforms memory-hole them. Terminal not invited. Built a GUI.

Paste URLs. They queue. They download. Disk space on screen. Output folder one click away. Queue survives restarts. Needs yt-dlp and ffmpeg, the app finds them. If it can't, it writes an AI prompt to fix your setup.

Click the ninja. It talks.

Private tool, now public. Mac & Windows installers. MIT.

github.com/miikkij/VideoNinja

Comments URL: https://news.ycombinator.com/item?id=47261308

Points: 1

# Comments: 0

Categories: Hacker News

Show HN: Turn GitHub commits into a publish-ready changelog

Hacker News - Thu, 03/05/2026 - 7:28am

Hi HN,

I kept shipping features without updating my changelog. After enough times a user asked “when did that change?”, I built HeyEmit to fix it.

HeyEmit is a changelog platform that integrates as a GitHub App, listens to repository events, analyzes commit diffs, and generates structured draft changelog entries for you to review and publish.

The goal isn’t to automate releases — it’s to remove the annoying part of writing changelogs so you actually maintain them.

Typical workflow:

- connect your GitHub repo

- define rules for what should trigger changelog entries

- commits generate draft entries automatically

- review, edit, and publish when ready

HeyEmit also provides an embeddable changelog widget for your app or website and a hosted public changelog page so your users can see what's changed.

It's a paid tool, with AI-generated changelog drafts available for projects that want automatic summaries.

I'd love feedback from other developers:

- how do you currently maintain changelogs?

- would something like this fit your workflow?

- what features would make it more useful?

Project: https://heyemit.com

Comments URL: https://news.ycombinator.com/item?id=47260843

Points: 1

# Comments: 0

Categories: Hacker News

Show HN: BidWix – one-shot price agreement using secret max/min

Hacker News - Thu, 03/05/2026 - 7:24am

Hi HN — I built BidWix, a small negotiation tool for agreeing on a price without haggling.

How it works:

- The buyer enters their true maximum price (kept secret from the seller). - The seller enters their true minimum price (kept secret from the buyer). - If there is overlap, BidWix suggests a single “fair” price using the geometric mean (so the compromise is symmetric in percentage terms, not absolute currency units).

Notes:

- No signup. Email is optional. No ads. - BidWix stops at the price suggestion. It does not handle payment, contracts, escrow, or delivery. - It’s meant for cases where both sides want to make a deal, but don’t want the “you go first” dance. - I’m not a skilled negotiator myself, so I wanted a tool where negotiation skill is less of an advantage. - It seems to work especially well for intangible goods (I’m a sound designer).

If you try it, I’d value feedback on:

- Where the flow feels confusing or too wordy. - Whether the suggested price feels reasonable in real negotiations you’ve had. - Any edge cases or incentive problems you see.

Optional background (rationale + math): https://bidwix.com/articles/why-geometric-mean-feels-fair

A great day to all of you! Stéphane (the guy who built myNoise)

Comments URL: https://news.ycombinator.com/item?id=47260817

Points: 1

# Comments: 0

Categories: Hacker News

Show HN: 3D linear and nonlinear WebGL Schrödinger numerical solver

Hacker News - Thu, 03/05/2026 - 7:21am

[Higher resolution, but possibly much more computationally demanding, version](https://marl0ny.github.io/split-operator-simulations/js/3d.h...). [2D version](https://marl0ny.github.io/split-operator-simulations/js/2d.h...). This was actually posted here long ago by someone else, where the comments were basically about not being able to run it in the first place. Well recently I've increased device compatibility, but even on some devices it may not run properly. For all Android devices I have to use a JavaScript FFT fallback instead of the default GLSL implementation, so expect significantly slower performance here. But even on some lower-end Android devices, it may not even run at all, so expect a black screen. I've also heard an issue where some of the GUI controls or buttons do not work; as I haven't been able to reproduce this, I suspect this is due to conflicts with browser extensions.

Comments URL: https://news.ycombinator.com/item?id=47260784

Points: 1

# Comments: 0

Categories: Hacker News

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