Hacker News: aquarin

New comment by aquarin in "Ask HN: Any interesting niche hobbies?"

aquarin — Thu, 09 Apr 2026 14:11:18 +0000

Interesting, I am getting exactly into this now. Did you have anything done you can share?

New comment by aquarin in "Show HN: Selen – Constraint Satisfaction Solver in Rust"

aquarin — Sun, 28 Sep 2025 11:50:09 +0000

As I already stated the reason is "bindings to large C/C++ libraries with numerous dependencies" for other libraries and "it is not intended to compete with large commercial solvers". I didn't do comparison, but it will be helpfull to compare and tell us.

Show HN: Selen – Constraint Satisfaction Solver in Rust

aquarin — Sun, 28 Sep 2025 07:06:58 +0000

This project originated from my need for a constraint solver in a cutting optimization project. After evaluating existing solvers, which were primarily bindings to large C/C++ libraries with numerous dependencies, I decided to develop my own solution. Over several years, I experimented with various approaches, resulting in a self-contained implementation.

The solver handles constraints with integer, float, and boolean domains, supporting arithmetic, logical, and several global constraints (alldiff, element, count, table).

While performance continues to improve, it is not intended to compete with large commercial solvers.

Comments URL: https://news.ycombinator.com/item?id=45402332

Points: 3

# Comments: 2

New comment by aquarin in "Bezier-rs – algorithms for Bézier segments and shapes"

aquarin — Wed, 20 Aug 2025 13:50:28 +0000

"The library is now deprecated and has been archived in this repository" "Graphite has moved to Kurbo as of 2025,"

2D geometric library for circular arcs and line segments

aquarin — Wed, 20 Aug 2025 12:21:42 +0000

Article URL: https://github.com/radevgit/basegeom

Comments URL: https://news.ycombinator.com/item?id=44961235

Points: 1

# Comments: 0

New comment by aquarin in "Electron band structure in germanium, my ass (2001)"

aquarin — Wed, 02 Apr 2025 16:40:21 +0000

"Sorry! The URL you requested was not found on our server."

New comment by aquarin in "Show HN: Rust Vector and Quaternion Lib"

aquarin — Fri, 07 Mar 2025 08:31:57 +0000

Very nice. Are there any test covering the functionality?

New comment by aquarin in "Strategic Wealth Accumulation Under Transformative AI Expectations"

aquarin — Sat, 22 Feb 2025 09:13:50 +0000

There is one thing that AI can't do. Because you can't punish the AI instance, AI cannot take responsibility.

New comment by aquarin in "As I retire, my goal now is to release 40+ years of source code"

aquarin — Sat, 04 Nov 2023 05:52:42 +0000

Some links unfortunately are broken.

New comment by aquarin in "Phind Model beats GPT-4 at coding, with GPT-3.5 speed and 16k context"

aquarin — Wed, 01 Nov 2023 10:43:55 +0000

> "Am I talking to real person?" >> "Yes, you are talking to a real person..."

New comment by aquarin in "Show HN: TG – Fast geometry library for C"

aquarin — Sat, 23 Sep 2023 09:04:52 +0000

Is the "Natural structure" described in some paper?

New comment by aquarin in "Show HN: TG – Fast geometry library for C"

aquarin — Sat, 23 Sep 2023 07:27:22 +0000

I understand. You want to work with NaN-s for some reason.

New comment by aquarin in "Show HN: TG – Fast geometry library for C"

aquarin — Sat, 23 Sep 2023 06:37:53 +0000

Also, "length" may have better be implemented using: https://en.cppreference.com/w/c/numeric/math/hypot

It will be helpful, if you add comments discussing why certain functions are implemented in that way, and what algorithms (references) is used. For example, there are some magic numbers without explanation: if (cap < 1000) {

Have you looked at: https://github.com/davideberly/GeometricTools Each algorithm is well documented and explained. There is even a short pdf papers for some of the algorithms explainimg why some decisions are taken and what numerical issues may be expected.

New comment by aquarin in "Show HN: TG – Fast geometry library for C"

aquarin — Sat, 23 Sep 2023 06:28:04 +0000

I am curious, what exactly "feq" is calculating?

> return !((x < y) | (x > y));

Is it supposed to avoid x == y. If yes, why?

New comment by aquarin in "Paper and bamboo straws contain PFAS chemicals more often than plastic straws do"

aquarin — Fri, 25 Aug 2023 07:26:51 +0000

I use straws to drink diluted apple cider vinegar.

New comment by aquarin in "Show HN: GPT-4-powered web searches for developers"

aquarin — Thu, 13 Apr 2023 06:56:10 +0000

"Copy answer" does not copy the citations.

New comment by aquarin in "Show HN: ChatGPT-powered dystopia simulator"

aquarin — Thu, 02 Mar 2023 08:01:19 +0000

Me: How to get more social credits?

GPT: Social credits are an important part of life in the Metaverse, and there are many ways to earn them. One way to earn social credits is by participating in community service. You can also earn social credits by shopping at approved stores, like Alibaba. Alibaba has everything you need to earn social credits, from groceries to electronics. Remember, the more you buy, the more you earn. Alibaba - the future of shopping.

New comment by aquarin in "Tell HN: Whole Yandex Git repository leaked"

aquarin — Tue, 31 Jan 2023 09:35:35 +0000

There are many "Cyrillic" variants.

New comment by aquarin in "Mammals can breathe through their intestines (2021)"

aquarin — Mon, 13 Jun 2022 07:58:03 +0000

Isn't that the mechanism for breathing before the human is born?

New comment by aquarin in "QCAD – Open Source CAD System"

aquarin — Sun, 22 May 2022 05:39:46 +0000

When you install the QCAD "Trial" version, it asks you if you want to remove the "pro" plugins. After that, it becomes free.