eggrobin Posted August 30, 2015 Author Share Posted August 30, 2015 I'm just saying, maybe a wild guess/downscale from RSS might be better than not having any gravitational quadrupoles in the Kerbol system at all.It would, but it's somebody else's problem. Nope . You've spent so much time doing gravity stuff in inertial reference systems that you totally forgot about the rules that apply on the surface of rotating bodies (no offense ). Kerbin should be oblate because it's rotating, but it is not because SQUAD simplified things. In real-life, if Earth was suddenly spherical, all oceans would flow towards the equator until Earth has returned to its proper oblate shape. This effect can be measured in-game, because the centrifugal force is simulated properly by the engine. At 45 deg N on a sphere it has equal upwards and southwards components, so the effective gravity vector is not perpendicular to the surface.Ah, on the surface, yes. Quote Link to comment Share on other sites More sharing options...
amankd Posted September 10, 2015 Share Posted September 10, 2015 gimme gimme gimme, where can i ger this!- - - Updated - - -I do offer the mod as a download, just go on the IRC channel and ask for it. You're probably asking why I don't simply put the link on the forum though.Well, this:In particular, there are some atypical considerations (bugreporting is different than for other mods, we have our own logs and our main failure mode is crashing, you need different builds for different platforms, you need to have the proper C++ runtime for your build).More generally, I'm afraid of this place turning into the FAR or MechJeb thread while this mod is under heavy development; I'd rather spend my time writing the mod than managing a messy forum thread, especially since it tends to take me a while to write a post (this one took me 25 min).Drag is mentioned in the OP, in the "Further modding" section, however it will be a while before we add that. When using RSS with Bourbaki, you already get interesting precession of low or medium Earth orbits due to oblateness, which requires you to either correct every now and then, or to pick stable orbits (üþûýøѠorbits are fun!).Edit:Oh, I had entirely forgotten this "prototype useless for gaming purposes" thing. I wrote that back in the days of the C# prototype in February 2014, that plugin ignored thrust (and was ridiculously slow)...I should probably remove that, considering I always play with principia. where and how can i log on to IRC Quote Link to comment Share on other sites More sharing options...
NathanKell Posted September 11, 2015 Share Posted September 11, 2015 http://webchat.esper.net/?channels=principia Quote Link to comment Share on other sites More sharing options...
nicogusuarez Posted October 7, 2015 Share Posted October 7, 2015 (edited) Are there any tutorials to put a probe in L1?EDIT: Or is there any way to put a probe in a Kerbol-Synchronous orbit? Edited October 7, 2015 by nicogusuarez Kerbol not sun Quote Link to comment Share on other sites More sharing options...
Whovian Posted October 8, 2015 Share Posted October 8, 2015 Question. Is this compatible with mods that add new planets? Quote Link to comment Share on other sites More sharing options...
vosechu Posted October 9, 2015 Share Posted October 9, 2015 Yes, but funniness may happen as you progress through time and your new planets start to affect the existing planets. Also, the new planets may not actually be in realistic orbits to begin with, so you may find them rapidly falling out of place. But that's because it works with mods that add planets. Quote Link to comment Share on other sites More sharing options...
nilof Posted October 9, 2015 Share Posted October 9, 2015 Are there any tutorials to put a probe in L1?EDIT: Or is there any way to put a probe in a Kerbol-Synchronous orbit?Kerbol-synchronous orbits are not currently possible as I understand it because of no J2 moments for the Kerbin system. For RSS and sun-synchronous orbits around Earth, you have this: https://en.wikipedia.org/wiki/Sun-synchronous_orbit with a formula for the inclination with a given semi-major axis. For L1, I suggest playing around in cis-lunar or cis-munar space for a while with a ship that has lots of fuel available as you build intuition. Beyond the lagrange points, distant retrograde orbits are also fun to play with.I have a question myself: since planetary orbits are integrated just like spacecraft orbits, is it possible to move small moons around with a big enough ship? Quote Link to comment Share on other sites More sharing options...
Nydoc Posted October 11, 2015 Share Posted October 11, 2015 I have a question myself: since planetary orbits are integrated just like spacecraft orbits, is it possible to move small moons around with a big enough ship?I think the answer is in the FAQ:Do you simulate the gravity of player-created vessels and asteroids?I'll let ferram4 answer that one. Umm... Yes, actually! It's only a few μm/s2 from most vessels, but we do simulate it. Really. It actually doesn't cost any overhead at all!On a more serious note, no. And we will not. Quote Link to comment Share on other sites More sharing options...
Autochton Posted October 11, 2015 Share Posted October 11, 2015 Although, applying sufficiently ridiculous amounts of thrust to a planetoid should change its orbit. It would be so tiny a change as to beggar the imagination, but you could. Theoretically, at least. Because nothing is on rails. Quote Link to comment Share on other sites More sharing options...
Goddess Bhavani Posted October 11, 2015 Share Posted October 11, 2015 Although, applying sufficiently ridiculous amounts of thrust to a planetoid should change its orbit. It would be so tiny a change as to beggar the imagination, but you could. Theoretically, at least. Because nothing is on rails.A re-enactment of Scott Manley's attempt to deorbit the Mun would be very amusing to replicate Quote Link to comment Share on other sites More sharing options...
nicogusuarez Posted October 12, 2015 Share Posted October 12, 2015 Kerbol-synchronous orbits are not currently possible as I understand it because of no J2 moments for the Kerbin system. For RSS and sun-synchronous orbits around Earth, you have this: https://en.wikipedia.org/wiki/Sun-synchronous_orbit with a formula for the inclination with a given semi-major axis. For L1, I suggest playing around in cis-lunar or cis-munar space for a while with a ship that has lots of fuel available as you build intuition. Beyond the lagrange points, distant retrograde orbits are also fun to play with.I have a question myself: since planetary orbits are integrated just like spacecraft orbits, is it possible to move small moons around with a big enough ship?Okay, thanks. Ill try to fool around with Lagrange points in the Kerbin-Mun system! Will post pics if succeeded. Quote Link to comment Share on other sites More sharing options...
blackrack Posted October 13, 2015 Share Posted October 13, 2015 A re-enactment of Scott Manley's attempt to deorbit the Mun would be very amusing to replicate Someone strap a few orion drives to the mun and do this. Quote Link to comment Share on other sites More sharing options...
gkorgood Posted October 13, 2015 Share Posted October 13, 2015 Someone strap a few orion drives to the mun and do this.please someone do this and post a video. or ask the great scott (pun absolutely, shamelessly, intended) himself to try! Quote Link to comment Share on other sites More sharing options...
eggrobin Posted October 15, 2015 Author Share Posted October 15, 2015 Although, applying sufficiently ridiculous amounts of thrust to a planetoid should change its orbit. It would be so tiny a change as to beggar the imagination, but you could. Theoretically, at least. Because nothing is on rails.A re-enactment of Scott Manley's attempt to deorbit the Mun would be very amusing to replicate Someone strap a few orion drives to the mun and do this.please someone do this and post a video. or ask the great scott (pun absolutely, shamelessly, intended) himself to try!Thrusting does not move planets (it doesn't in stock, and we just grab the change in velocity from what the stock game does). Even if we handled thrust ourselves, it would be significantly more convenient to ignore the effects of thrust on celestials: their orbits are (since Bourbaki) precomputed by the Ephemeris class, allowing us to use a larger timestep for that, as well as compute it only once. Ephemeris then provides functions to integrate the trajectories of massless bodies within the system (optionally with some proper acceleration), and that is what we use for vessels (stock's asteroids are vessels too). Quote Link to comment Share on other sites More sharing options...
blackrack Posted October 15, 2015 Share Posted October 15, 2015 Thrusting does not move planets (it doesn't in stock, and we just grab the change in velocity from what the stock game does). Even if we handled thrust ourselves, it would be significantly more convenient to ignore the effects of thrust on celestials: their orbits are (since Bourbaki) precomputed by the Ephemeris class, allowing us to use a larger timestep for that, as well as compute it only once. Ephemeris then provides functions to integrate the trajectories of massless bodies within the system (optionally with some proper acceleration), and that is what we use for vessels (stock's asteroids are vessels too).Oh well, would have been a fun thing to do. Quote Link to comment Share on other sites More sharing options...
eggrobin Posted October 15, 2015 Author Share Posted October 15, 2015 Oh well, would have been a fun thing to do.Fortunately, there is a steady supply of fun things to do (although they will be far more accessible once we get manœuvre nodes working). Quote Link to comment Share on other sites More sharing options...
m4ti140 Posted November 17, 2015 Share Posted November 17, 2015 Squad should hire you. Quote Link to comment Share on other sites More sharing options...
blackrack Posted November 17, 2015 Share Posted November 17, 2015 [quote name='eggrobin'](although they will be far more accessible once we get manœuvre nodes working). :)[/QUOTE] Please say that will be available soon. Quote Link to comment Share on other sites More sharing options...
jkortech Posted November 18, 2015 Share Posted November 18, 2015 Does this work in KSP 1.0.5? Quote Link to comment Share on other sites More sharing options...
Semmel Posted November 20, 2015 Share Posted November 20, 2015 Wow, I am surprised. I came here to ask if heliosynchronous orbits are possible (well, precession of orbits due to ellipsoidal shape of bodies really) is possible and if you would consider it for implementation.. and it is already in by looking at your last change-log! I am blown away by that to be honest! I never really understood these orbits, they seem like wizardry. I am very much looking forwards to your mod! Quote Link to comment Share on other sites More sharing options...
Derpistheword Posted January 23, 2016 Share Posted January 23, 2016 The physics are super jumpy when landing on bodies, i landed on minimus, and well, Jeb ,bill and bob don't have a ship anymore, it seems like the rocket is acting like its hitting minimus at orbital speeds, even though i was only going 1.2 m/s , i don't mean that its exploding, its sort-of , rubber-like, its very springy like when a part is scraping the ground, or a broken rover wheel, except im only touching the ground, oh and the kerbals get KO'd when i touch the ground, other than that, this mod is a work of beauty i love messing with it too! great job, your a true physicist. On 11/18/2015 at 3:47 PM, jkortech said: Does this work in KSP 1.0.5? yes it does, im testing it currently Quote Link to comment Share on other sites More sharing options...
Autochton Posted February 3, 2016 Share Posted February 3, 2016 1 hour ago, Mods_o_joy said: So, has anyone made a video or something because i have No F^#& Idea what this is other than the fact that it changes physics(COME AT ME KRAKEN!) Short explanation: It changes the way orbits are calculated. It does away with spheres of influence as hard-shell balls around objects in space inside which only the dominant object has sway, but rather, as in real life, models gravity as a combination of forces applied by all nearby objects (i.e. if you're halfway between Kerbin and Mün - or Earth and the Moon - expect both to pull at you, and your orbit to shift accordingly). As such, orbits that are stable over time become harder (so you'll need to do stationkeeping), but things like Lissajous orbits (around Lagrange points) and suchlike become possible, opening new doors in the game. Quote Link to comment Share on other sites More sharing options...
Benji Posted February 4, 2016 Share Posted February 4, 2016 On 3.2.2016 at 11:53 AM, Mods_o_joy said: So, Real life physics?, How much will this Kill my FPS, Drop from 20 normal down to 1 is what im expecting Didn't drop the framerate for me. As long as I didn't activate the 3D "orbital lines" (Haven't played in a while. Can't remember how they are named. But the 2D versions worked without dropping the framerate). Quote Link to comment Share on other sites More sharing options...
Andem Posted February 4, 2016 Share Posted February 4, 2016 @eggrobin Is this the mod that repeatedly destroyed the Joolian system? Damn Tylo... Quote Link to comment Share on other sites More sharing options...
SiCaRiO31 Posted February 6, 2016 Share Posted February 6, 2016 On 4/2/2016 at 5:13 PM, Andem said: @eggrobin Is this the mod that repeatedly destroyed the Joolian system? Damn Tylo... yes it is https://www.youtube.com/watch?v=O0_OQRN1VNA Quote Link to comment Share on other sites More sharing options...
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