6 ms·

SpaceSim

366 points by Luc 2y ago

yboris 2y ago
Tangentially related: Gravity Wars - a fun 2 player physics artillery game where planets affect projectile path https://github.com/whyboris/Gravity-Wars https://github.com/whyboris/Gravity-Wars
- deleted 2y ago
  [deleted]
- tetris11 2y ago
  Oh wow, I wish saw this in the list of projects when LÖVE was featured here the other day. This looks super fun. Edit: I'm loving the explosion-revenge last-ditch effort to counterstrike when hit. Fantastic concept.
- imiric 2y ago
  Moonshot[1] is another similar game, and a bit more polished. It was abandoned, unfortunately, but it's fun for a few minutes. I just noticed there's Orbit Outlaws[2] from the same developer, which builds on the same concept (for better or worse), but is also abandoned. [1]: https://store.steampowered.com/app/426930/Moonshot/ https://store.steampowered.com/app/426930/Moonshot/ [2]: https://store.steampowered.com/app/1319100/Orbit_Outlaws/ https://store.steampowered.com/app/1319100/Orbit_Outlaws/
- cafeinux 2y ago
  > Tangentially related I see what you did here.
NKosmatos 2y ago
It would be fun if we could define planets with our own materials, like bananas (influenced by xkcd), diamonds or whatever other silly substance we like :-)
- stoneman24 2y ago
  Or chocolate (Terry Pratchett: Thief of time) IIRC
PointyFluff 2y ago
[dead]
- pavlov 2y ago
  Developing for a single platform in 2025 is like developing for a single platform in 2005, if you don’t care about mobile. The desktop marketshare of the various platforms hasn’t fundamentally shifted since then. Mobile was all additive, and Microsoft lost it. But Mac and Linux remain roughly where they were.
  - ugh123 2y ago
    This chart indicates lots of growth for OSx since at least 2009 (as their data goes back to). https://gs.statcounter.com/os-market-share/desktop/worldwide/#monthly-200901-202412 https://gs.statcounter.com/os-market-share/desktop/worldwide...
    - briandear 2y ago
      Would be interesting if they took out enterprise and/or computers were forced to use rather than chose to purchase.
  - ordu 2y ago
    I believe, that the GP comment is too dismissive, but it is true. In 2005 when the dominance of IE started to dissolve it was not the best move to develop for a single browser. Though people still did it. Today we see a rise of ARM on desktops, developing for x86 excludes Mac users, but the situation moves in a direction when exclusive x86 software will exclude an assortment of users of different OSes who chose to buy ARM desktop/laptop. But I completely understand the choice made by the author, to use vector extensions on two (or three? RISC-V?) processors would be a much more additional work. The project is FOSS so anyone can jump in and add support for ARM vector extensions. Hopefully it will be easier then to write it from scratch, because you can compare intermediate results bit to bit, and catch mistakes red handed.
- owenthejumper 2y ago
greenavocado 2y ago
Installer and game work perfectly on Intel Integrated Graphics on Linux with Wine 9.22
- pixelesque 2y ago
  Note that it does build natively for Linux (and other platforms) from source, and the github page: https://github.com/pavelsevecek/OpenSPH https://github.com/pavelsevecek/OpenSPH includes an old Debian package you can install (although for Debian 10, and doesn't work on recent Ubuntu/Mint installs either)...
  - throwaway314155 2y ago
    Certainly feels like a missed opportunity not to advertise that somewhere official.
mturk 2y ago
This is really impressive.
- pixelpoet 2y ago
  I worked with the author at Corona Renderer; guy's a genius, no sweat.
apetrov 2y ago
Looks great, but GitHub metrics indicate that, unfortunately, the project has stalled. The last commit was six months ago on master and two months ago on develop. source: https://github.com/pavelsevecek/OpenSPH/graphs/contributors https://github.com/pavelsevecek/OpenSPH/graphs/contributors
- apetrov 2y ago
  update: based on author's activity on youtube, he still works on it https://www.youtube.com/@pavelsevecek/videos?view=0&sort=dd&shelf_id=1 https://www.youtube.com/@pavelsevecek/videos?view=0&sort=dd&...
- PontifexCipher 2y ago
  Two months without a commit could still be quite active and useful software, especially for a personal project. Where would you draw the line?
  - apetrov 2y ago
    Yes, I don’t question the usefulness of the project by any means. To be frank, I’m personally very interested in it—I studied celestial mechanics at university many years ago and am still curious about simulations. The graph on the chart I shared suggests that the peak of contributions was a couple of years ago, with occasional changes since then. This doesn’t make much sense to me, as the rendering quality looks great (at least in the videos—I’ll try the software a bit later), and it’s head and shoulders above what the scientific community is currently using.
    - risenshinetech 2y ago
      You can't imagine that someone working on something like this would slow down as the work neared completion? Why must a piece of software / code constantly be changing? What's your specific concern? You're making a very strong claim that the "project has stalled" without any real evidence. Furthermore, the project "stalling" makes it less... what, exactly?
lacoolj 2y ago
I just did this install, then went to remove and it attempted to remove `/usr/local/bin`
- dylan604 2y ago
  typing in 'rm' in any script I write scares the bejeebus out of me. I tend to write 'echo rm' so I get a chance to review while testing to catch this specific type of issue.
  - lucb1e 2y ago
    Can use -i to confirm deletions also, to not have to edit and re-do the command. The downside is being asked for everything individually rather than confirming one (big) list, so not sure if this fits your use-case
    - dylan604 2y ago
      the -i option doesn't really work well for scripts intended to run unattended and headless, so no it doesn't fit the use case. now i'm waiting for the suggestions to use -rf
  - mmahemoff 2y ago
    Instead of deleting anything, my scripts usually mv files to a timestamped folder under /tmp. In practical terms, it’s rarely a noticeable difference in performance or disk usage. Also makes scripts easier to debug when you can inspect transient artifacts.
    - dylan604 2y ago
      I manage large video/audio assets, so disk usage is very noticeable. I've done the mv to a designated trash folder with another script that finds files in that folder older than designated time to live and then -exec rm -f {} \; type of stuff. Even typing that out still gives me pause. Nobody ever needs a file with such urgency as just 24 hours after it was deleted, but not in the designated time out window.
tetris11 2y ago
Are there any easy examples one can just run once installed? Or can anyone on HN give me any hints on a valid flow chart
- starlite-5008 2y ago
  [dead]
andrepd 2y ago
Cf. https://spaceengine.org/ https://spaceengine.org/
DarkmSparks 2y ago
very very cool, its also so rare these days to see the scientific crowd bother building windows installers, now people whose only skillset is using microsoft word and cheating in games can get a glimpse of what modern compute is capable of, hopefully inspire some of them to think beyond badly formatted text documents. Although at this point they are more likely to call it science fiction because they all know the earth is flat.

366 points by Luc 2y ago

Tangentially related: Gravity Wars - a fun 2 player physics artillery game where planets affect projectile path https://github.com/whyboris/Gravity-Wars https://github.com/whyboris/Gravity-Wars

deleted 2y ago
[deleted]
tetris11 2y ago
Oh wow, I wish saw this in the list of projects when LÖVE was featured here the other day. This looks super fun. Edit: I'm loving the explosion-revenge last-ditch effort to counterstrike when hit. Fantastic concept.
imiric 2y ago
Moonshot[1] is another similar game, and a bit more polished. It was abandoned, unfortunately, but it's fun for a few minutes. I just noticed there's Orbit Outlaws[2] from the same developer, which builds on the same concept (for better or worse), but is also abandoned. [1]: https://store.steampowered.com/app/426930/Moonshot/ https://store.steampowered.com/app/426930/Moonshot/ [2]: https://store.steampowered.com/app/1319100/Orbit_Outlaws/ https://store.steampowered.com/app/1319100/Orbit_Outlaws/
cafeinux 2y ago
> Tangentially related I see what you did here.

NKosmatos 2y ago

It would be fun if we could define planets with our own materials, like bananas (influenced by xkcd), diamonds or whatever other silly substance we like :-)

stoneman24 2y ago
Or chocolate (Terry Pratchett: Thief of time) IIRC

PointyFluff 2y ago

[dead]

pavlov 2y ago
Developing for a single platform in 2025 is like developing for a single platform in 2005, if you don’t care about mobile. The desktop marketshare of the various platforms hasn’t fundamentally shifted since then. Mobile was all additive, and Microsoft lost it. But Mac and Linux remain roughly where they were.
- ugh123 2y ago
  This chart indicates lots of growth for OSx since at least 2009 (as their data goes back to). https://gs.statcounter.com/os-market-share/desktop/worldwide/#monthly-200901-202412 https://gs.statcounter.com/os-market-share/desktop/worldwide...
  - briandear 2y ago
    Would be interesting if they took out enterprise and/or computers were forced to use rather than chose to purchase.
- ordu 2y ago
  I believe, that the GP comment is too dismissive, but it is true. In 2005 when the dominance of IE started to dissolve it was not the best move to develop for a single browser. Though people still did it. Today we see a rise of ARM on desktops, developing for x86 excludes Mac users, but the situation moves in a direction when exclusive x86 software will exclude an assortment of users of different OSes who chose to buy ARM desktop/laptop. But I completely understand the choice made by the author, to use vector extensions on two (or three? RISC-V?) processors would be a much more additional work. The project is FOSS so anyone can jump in and add support for ARM vector extensions. Hopefully it will be easier then to write it from scratch, because you can compare intermediate results bit to bit, and catch mistakes red handed.
owenthejumper 2y ago

greenavocado 2y ago

Installer and game work perfectly on Intel Integrated Graphics on Linux with Wine 9.22

pixelesque 2y ago
Note that it does build natively for Linux (and other platforms) from source, and the github page: https://github.com/pavelsevecek/OpenSPH https://github.com/pavelsevecek/OpenSPH includes an old Debian package you can install (although for Debian 10, and doesn't work on recent Ubuntu/Mint installs either)...
- throwaway314155 2y ago
  Certainly feels like a missed opportunity not to advertise that somewhere official.

mturk 2y ago

This is really impressive.

pixelpoet 2y ago
I worked with the author at Corona Renderer; guy's a genius, no sweat.

apetrov 2y ago

Looks great, but GitHub metrics indicate that, unfortunately, the project has stalled. The last commit was six months ago on master and two months ago on develop. source: https://github.com/pavelsevecek/OpenSPH/graphs/contributors https://github.com/pavelsevecek/OpenSPH/graphs/contributors

apetrov 2y ago
update: based on author's activity on youtube, he still works on it https://www.youtube.com/@pavelsevecek/videos?view=0&sort=dd&shelf_id=1 https://www.youtube.com/@pavelsevecek/videos?view=0&sort=dd&...
PontifexCipher 2y ago
Two months without a commit could still be quite active and useful software, especially for a personal project. Where would you draw the line?
- apetrov 2y ago
  Yes, I don’t question the usefulness of the project by any means. To be frank, I’m personally very interested in it—I studied celestial mechanics at university many years ago and am still curious about simulations. The graph on the chart I shared suggests that the peak of contributions was a couple of years ago, with occasional changes since then. This doesn’t make much sense to me, as the rendering quality looks great (at least in the videos—I’ll try the software a bit later), and it’s head and shoulders above what the scientific community is currently using.
  - risenshinetech 2y ago
    You can't imagine that someone working on something like this would slow down as the work neared completion? Why must a piece of software / code constantly be changing? What's your specific concern? You're making a very strong claim that the "project has stalled" without any real evidence. Furthermore, the project "stalling" makes it less... what, exactly?

lacoolj 2y ago

I just did this install, then went to remove and it attempted to remove `/usr/local/bin`

dylan604 2y ago
typing in 'rm' in any script I write scares the bejeebus out of me. I tend to write 'echo rm' so I get a chance to review while testing to catch this specific type of issue.
- lucb1e 2y ago
  Can use -i to confirm deletions also, to not have to edit and re-do the command. The downside is being asked for everything individually rather than confirming one (big) list, so not sure if this fits your use-case
  - dylan604 2y ago
    the -i option doesn't really work well for scripts intended to run unattended and headless, so no it doesn't fit the use case. now i'm waiting for the suggestions to use -rf
- mmahemoff 2y ago
  Instead of deleting anything, my scripts usually mv files to a timestamped folder under /tmp. In practical terms, it’s rarely a noticeable difference in performance or disk usage. Also makes scripts easier to debug when you can inspect transient artifacts.
  - dylan604 2y ago
    I manage large video/audio assets, so disk usage is very noticeable. I've done the mv to a designated trash folder with another script that finds files in that folder older than designated time to live and then -exec rm -f {} \; type of stuff. Even typing that out still gives me pause. Nobody ever needs a file with such urgency as just 24 hours after it was deleted, but not in the designated time out window.

tetris11 2y ago

Are there any easy examples one can just run once installed? Or can anyone on HN give me any hints on a valid flow chart

starlite-5008 2y ago
[dead]

andrepd 2y ago

Cf. https://spaceengine.org/ https://spaceengine.org/

DarkmSparks 2y ago

very very cool, its also so rare these days to see the scientific crowd bother building windows installers, now people whose only skillset is using microsoft word and cheating in games can get a glimpse of what modern compute is capable of, hopefully inspire some of them to think beyond badly formatted text documents. Although at this point they are more likely to call it science fiction because they all know the earth is flat.