Hacker News: luismedel

New comment by luismedel in "Fluid Simulation for Dummies (2006)"

luismedel — Thu, 04 Jun 2026 12:37:10 +0000

Nice.

The earliest jaw-dropping water effect I saw (and somewhat understood at 14) was the awesome credits scene from the Iguana's Earthquake demo[0].

The code[1] contains the following explanation (ancient DOS chars fixed with chatGPT)

  ; // UpdateTable : performs one integration step on U[CT]
  ; Differential equation is:  u  = a²( u  + u  )
  ;                             tt       xx   yy
  ;
  ; Where a² = tension * gravity / surface_density.
  ;
  ; Approximating second derivatives by central differences:
  ;
  ;  [ u(t+1)-2u(t)+u(t-1) ] / Δt² = a² (u(x+1)+u(x-1)+u(y+1)+u(y-1)-4u) / h²
  ;
  ; (where Δt = time step, h=Δx=Δy = mesh resolution)
  ;
  ; From where u(t+1) may be calculated as:
  ;                   ┌   1   ┐
  ; u(t+1) = a²Δt²/h² │ 1 0 1 │u - u(t-1) + (2-4a²Δt²/h²)u
  ;                   └   1   ┘
  ;
  ; When a²Δt²/h² = ½ last term vanishes, giving:
  ;                   ┌   1   ┐
  ;        u(t+1) = ½ │ 1 0 1 │u - u(t-1)
  ;                   └   1   ┘
  ;
  ; This needs only 4 ADD/SUB and one SAR operation per mesh point!

[0] https://www.pouet.net/prod.php?which=364

[1] https://hornet.org/code/demosrc/demos/hq_water.zip

New comment by luismedel in "Magnifica Humanitas"

luismedel — Mon, 25 May 2026 19:24:42 +0000

Politics, football (soccer) and religion are always very sensitive topics.

Maybe the OP's "not that important" was an unfortunate way to put it.

I think the answers you ask for are in Ordinatio Sacerdotalis[0]

[0] https://www.vatican.va/content/john-paul-ii/en/apost_letters...

New comment by luismedel in "Magnifica Humanitas"

luismedel — Mon, 25 May 2026 19:18:56 +0000

Catholics.

New comment by luismedel in "Show HN: Oberon System 3 runs natively on Raspberry Pi 3 (with ready SD card)"

luismedel — Mon, 13 Apr 2026 15:42:36 +0000

Exactly. I knew what the link was about and didn't study at ETH Zurich. I (mistakenly?) think Oberon is that kind of "roots knowledge" shared between all of us, like Lisp or Forth. That's why I asked when one should stop clarifying things. Maybe some people need to know what a compiler os, or a VM, or a windowing system, or ...whatever.

What I mean is that having so much info at the toe of our tips, comments like "you should put a link about what this thing is" are needless.

New comment by luismedel in "Show HN: Oberon System 3 runs natively on Raspberry Pi 3 (with ready SD card)"

luismedel — Mon, 13 Apr 2026 15:06:52 +0000

Honest question. Where does one stop clarifying things?

Encode/httpx: Closing off access

luismedel — Wed, 11 Mar 2026 10:01:10 +0000

Article URL: https://github.com/encode/httpx/discussions/3784

Comments URL: https://news.ycombinator.com/item?id=47333647

Points: 3

# Comments: 1

The Styx Architecture for Distributed Systems (1999)

luismedel — Mon, 09 Feb 2026 13:21:22 +0000

Article URL: https://inferno-os.org/inferno/papers/styx.html

Comments URL: https://news.ycombinator.com/item?id=46944919

Points: 1

# Comments: 0

New comment by luismedel in "Snow Simulation Toy"

luismedel — Tue, 27 Jan 2026 15:08:36 +0000

I always loved that intro too [0] :-) I implemented the effect in Pascal back then.

FYI, you can download the source code [1].

[0] https://news.ycombinator.com/item?id=31311461 [1] http://ftp.lanet.lv/ftp/mirror/x2ftp/msdos/programming/iguan...

New comment by luismedel in "30 Years of ReactOS"

luismedel — Thu, 22 Jan 2026 14:28:53 +0000

What if the agents were trained by leaked Microsoft code?

Aiocop: Non-intrusive monitoring for Python asyncio event loop blocks

luismedel — Wed, 07 Jan 2026 14:45:36 +0000

Article URL: https://github.com/Feverup/aiocop

Comments URL: https://news.ycombinator.com/item?id=46526919

Points: 2

# Comments: 0

Gnumeric

luismedel — Wed, 31 Dec 2025 13:19:29 +0000

Article URL: https://gnome.pages.gitlab.gnome.org/gnumeric-web/

Comments URL: https://news.ycombinator.com/item?id=46443847

Points: 3

# Comments: 0

New comment by luismedel in "Ask HN: What is the most important thing in life?"

luismedel — Mon, 17 Nov 2025 12:56:12 +0000

Perfect answer, fellow cimmerian.

New comment by luismedel in ".NET MAUI is coming to Linux and the browser"

luismedel — Wed, 12 Nov 2025 07:45:32 +0000

Honestly, I feel that everything UI related has gone backwards to the stone age.

I wonder how hard would it be to go back to visual designers like we had with Delphi or VB6. There were flexible layout container components which helped a lot when adapting forms to varying screen resolutions.

New comment by luismedel in "AOL to be sold to Bending Spoons for $1.5B"

luismedel — Wed, 29 Oct 2025 22:21:37 +0000

All companies I've worked at had (paid) on-call set up. The right to disconnect isn't incompatible with business needs and the law contemplates it. Also, nurses and doctors do it too.

Are-we-fast-yet implementations in Oberon, C++, C, Pascal, Micron and Luon

luismedel — Sun, 26 Oct 2025 23:08:09 +0000

Article URL: https://github.com/rochus-keller/Are-we-fast-yet

Comments URL: https://news.ycombinator.com/item?id=45715873

Points: 91

# Comments: 25

Microsoft/Detours: A package for monitoring and instrumenting Win32 API calls

luismedel — Fri, 17 Oct 2025 06:38:14 +0000

Article URL: https://github.com/microsoft/Detours

Comments URL: https://news.ycombinator.com/item?id=45613894

Points: 2

# Comments: 0

New comment by luismedel in "Chat-GPT becomes Sex-GPT for verified adults"

luismedel — Thu, 16 Oct 2025 13:22:02 +0000

Another kind of porn?

U++ – Cross-Platform App Development Framework

luismedel — Wed, 15 Oct 2025 06:31:41 +0000

Article URL: https://www.ultimatepp.org/

Comments URL: https://news.ycombinator.com/item?id=45588768

Points: 2

# Comments: 0

New comment by luismedel in "Tcl-Lang Showcase"

luismedel — Wed, 08 Oct 2025 11:29:32 +0000

I remember not only running commands while debugging. I remember moving the program counter back, until a statement above my breakpoint, making live changes in the code and stepping it again until the breakpoint to see the effects of my changes without needing to restart the program.

Tcl-Lang Showcase

luismedel — Tue, 07 Oct 2025 13:25:33 +0000

Article URL: https://wiki.tcl-lang.org/page/Showcase

Comments URL: https://news.ycombinator.com/item?id=45502784

Points: 121

# Comments: 44