01:20 <queqiao-> ⟨kingparity⟩ nvm i literally just needed to make the […] ⮪ After a lot of fiddling with VS Studio I managed to get it down to.. 62 errors :p

22:49 <queqiao-> ⟨Fiora⟩ i notice that ever since i installed principia, my craft tend to not stay pointing in one direction, e.g. if i do a mechjeb node execution, it'll aim it at 9 minutes before, then by the time it reaches the node, it'll need a small correction, where it didn't before

22:49 <queqiao-> this isn't a problem, but i'm curious if this is an effect of newtonian mechanics? i'd like to understand it

22:49 <queqiao-> ⟨Fiora⟩ * in the right direction

22:49 <queqiao-> ⟨egg⟩ ⟪Fiora⟫ i notice that ever since i installed […] ⮪ So, in stock, warping sets the angular velocity to 0.

22:49 <queqiao-> ⟨egg⟩ In Principia, we integrate Euler’s equations.

22:49 <queqiao-> ⟨Fiora⟩ i'm using RO, so it didn't used to do that

22:50 <queqiao-> ⟨Fiora⟩ * set angular velocity to zero on warp

22:50 <queqiao-> ⟨Fiora⟩ but i notice with principia it's _less_ stable than before, which is interesting

22:50 <queqiao-> ⟨egg⟩ Ah, right, you used PersistentRotation?

22:50 <queqiao-> ⟨Fiora⟩ its built into RO

22:50 <queqiao-> ⟨Fiora⟩ * RO/RP-1

22:51 <queqiao-> ⟨Fiora⟩ +the cheese you could pull off if it let you zero rotation on command would be truly astounding

22:51 <queqiao-> ⟨egg⟩ Right. PersistentRotation fixes the angular velocity (like PhysX itself), whereas we fix the angular momentum (like, well, the laws of physics).

22:52 <queqiao-> ⟨Fiora⟩ ahhhhhhhhhhhhhh. _that_ makes sense

22:53 <queqiao-> ⟨egg⟩ (I did link you the _PhysX is crap_ discussion, right?)

22:53 <queqiao-> ⟨lpg⟩ even persistent rotation _does_ zero small amounts of rotation when going to warp with SAS on

22:53 <queqiao-> ⟨Fiora⟩ AH. i see

22:53 <queqiao-> ⟨Fiora⟩ that explains the behavior i saw. its a nice convenience tbh

22:53 <queqiao-> ⟨Fiora⟩ since otherwise you'd be unable to ever point a spacecraft in a single direction long term

22:53 <queqiao-> ⟨egg⟩ Yeah. There is an open issue to do something about attitude-keeping.

22:54 <queqiao-> ⟨egg⟩ https://github.com/mockingbirdnest/Principia/issues/2556

22:54 <queqiao-> ⟨Fiora⟩ the way i've been handling it is the simple "take advantage of kerbalism only calculating solar panel coverage when you leave the craft for the tracking menu" to simulate being pointed towards the sun

22:54 <queqiao-> ⟨Fiora⟩ but that is slightly cheese

22:54 <queqiao-> ⟨lpg⟩ principia also has a zero-rotation-on-warp feature of sorts, Hack Gravity reverts the active vessel to stock behavior

22:55 <queqiao-> ⟨egg⟩ Well, that is the « escape Principia » hatch, rather than a feature _per se_. But yes, it can be a workaround in a pinch.

22:55 <queqiao-> ⟨egg⟩ (kills your vessel history and flight plans, and voids your warranty. use with caution.)

22:56 <queqiao-> ⟨lpg⟩ it's been a _problem_ for me more often than not. sim into orbit, hack gravity, hyperedit to the right reentry trajectory, spin up, warp, dammit forgot to un-hack

22:56 <queqiao-> ⟨egg⟩ hah

23:04 <queqiao-> ⟨egg⟩ test_account following up on https://discord.com/channels/319857228905447436/320197886614700033/1098957808390647888 in a more relevant channel: the relevant citation is table 6.3 on p. 190 of _Satellites: de Kepler au GPS_, p. 20 of the translation _Handbook of Satellite Orbits: from Kepler to GPS_, or table 3.5 on p. 95 of the translation of the earlier edition _Satellites: Orbits and missions_.

23:04 <queqiao-> ⟨egg⟩ test_account following up on https://discord.com/channels/319857228905447436/320197886614700033/1098957808390647888 in a more relevant channel: the relevant citation is table 6.3 on p. 190 of _Satellites: de Kepler au GPS_ https://discord.com/channels/319857228905447436/480397772248580098/573129806959476775, p. 20 of the translation _Handbook of Satellite Orbits: from Kepler to GPS_, or table 3.5 on p. 95 of the translation of the...

23:04 <queqiao-> ... earlier edition _Satellites: Orbits and missions_.

23:06 <queqiao-> ⟨egg⟩ * _Satellites :

23:10 <queqiao-> ⟨egg⟩ That table says the inhomogeneity of the gravitational field of the primary causes large secular variation in Ω, ω, moderate periodic variation in e, and small periodic variation in i, Ω, ω (that is for a satellite in LEO, but should be applicable for a satellite in a low lunar orbit as well).