raptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Galileo. We currently target 1.5.1, 1.6.1, 1.7.x, 1.8.1, and 1.9.1. <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly… | <egg> also 4e16 m * 2^-52 is uncomfortably large
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<discord->
Butcher. — Did we ever get an api to read from the predicted flight path?
<discord->
Butcher. — That's for planning, I think lamont asked for a way to read the current prediction.
<discord->
Zeusbeer. — You would need to specify the frame first, then the apoapsis/periapsis/an/dn
<discord->
Butcher. — Hmm can't see anything in the issues list.
<discord->
Zeusbeer. — +spaghetti orbits are hard to get information of
<discord->
Butcher. — Huh?
<discord->
Zeusbeer. — When the orbit is not circular/elliptical, how do you read it with kos?
<discord->
Butcher. — I don't want any of those points specifically.
<discord->
Butcher. — You ask for where the shop will be at a certain time.
<discord->
Butcher. — You ask for where the ship will be at a certain time. (edited)
<discord->
Butcher. — Much like the current kos function `positionat`.
<discord->
Zeusbeer. — Mhm, you're right, didn't think of that lol
<discord->
Butcher. — But using principia for data, not the osculating orbit.
<discord->
Zeusbeer. — So you can make something like a transfer script, that'd be pretty cool
<discord->
Butcher. — I was thinking of using it for targeted landings, you could tweak the transfer from further away to give an accurate landing.
<discord->
Butcher. — At the moment I just eyeball it then refine when close.
<discord->
Zeusbeer. — If that gets added I might look back into KoS
<discord->
Butcher. — My last landing with principia was around 500m from the target.
<discord->
sichelgaita. — There is `VesselGetPosition` but it's only for the past, not the prediction. I can't see anything in the issues list either.
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[Principia] pleroy opened pull request #2698: Remove Normed and use Hilbert everywhere - https://git.io/JULwl
<discord->
Zeusbeer. — with the past position and position of the celestials you should be able to compute n-body physics with that information and use kOs like that
<discord->
Stonesmile. — A couple of days ago there was a discussion about windows file systems being a reason why KSP is slow to load. Would Linux handle that better?
<discord->
Zeusbeer. — maybe try templeOS
<discord->
Zeusbeer. — 😂
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<discord->
Standecco. — true IT veterans use templeOS only
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<discord->
egg. — > That's for planning, I think lamont asked for a way to read the current prediction.
<discord->
egg. — @Butcher where? I don’t see much @lamont in the backlog
<discord->
scimas. — @Butcher I was the one asking for the position / velocity data from the current prediction. The conversation happened here on discord, no github issue. From what egg explained, the prediction we see on the map screen only really makes sense when in the map view. It doesn't get updated in flight view. And then there are more issues with how to deal with setting the reference frame and how far into t
<discord->
egg. — nothing is simple and it all gets more complicated, if you stand on it it will break down, etc.
<discord->
Butcher. — Hmm, fair enough.
<discord->
Standecco. — you could calculate the position yourself, if you are talking about landings only
<discord->
Standecco. — you can approximate gravity to μm/r² for sure, possibly even to a constant field
<discord->
Calvin_Maclure. — What the fuck!??!?
<discord->
Calvin_Maclure. — Since when does Better warp time NOT work DURING a burn??!
<discord->
Calvin_Maclure. — What is even the point????
<discord->
Calvin_Maclure. — Not having the ability to 0.1x time warp during a burn makes that mod completely useless...
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<discord->
pt1243. — huh? you can slow down time during a burn
<discord->
Calvin_Maclure. — Well, that's what Better Burn Time is SUPPOSE to allow you to do
<discord->
pt1243. — yes... and I'm saying it does as advertised
<discord->
pt1243. — this would probably also be best for #ro-general
<_whitenotifier-9244>
[Principia] pleroy opened pull request #2699: Pointwise inner product of polynomials - https://git.io/JUL9I
<discord->
Zeusbeer. — I guess that's also not burning though
<discord->
Damien. — @Calvin_Maclure normal timewarp doesn't work when accelerating. That's a ksp limitation. You need to use physwarp
<discord->
Calvin_Maclure. — I'm doing something wrong. It lets me 0.1x during no acc, but it doesn't let me do anything other than 1x, 2x, ...
<discord->
Calvin_Maclure. — even when Alt+.
<discord->
Calvin_Maclure. — Ah... ok, I understand what you mean... the ''physical time warp'' opt has to be chose...
<discord->
Butcher. — @Standecco that's what I do now - use the osculating orbit to approximate, I was hoping to be able to tune things from further out, which requires principia.
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<discord->
Standecco. — do you really need principia's precision for landings?
<discord->
Standecco. — I suppose it depends on where your landing script starts
<discord->
Calvin_Maclure. — Is there a reason why my staging causes oscilations in my probe?
<discord->
Calvin_Maclure. — It's spinning, perfectly balanced... hit stage... and OSCILLATION!
<discord->
Calvin_Maclure. — Does Principia have a known issue about that?
<discord->
Calvin_Maclure. — Just trying to figure out why this is happening, was told Pr was the cause...
<discord->
Stonesmile. — If by oscillation you mean the tennis racket theorem, then that is intended
<discord->
Calvin_Maclure. — So... spin stabilized stuff is never now stabilized?
<discord->
Calvin_Maclure. — I mean, I understand what the phenomenon is
<discord->
Calvin_Maclure. — I studied in my undergrad (though at this point the math is rusty)
<discord->
Stonesmile. — If you spin it about the correct axis you are fine
<discord->
Calvin_Maclure. — Well that's the thing. The spin is stable, I hot stage and as SOON as the staging occurs, oscilations begin
<discord->
Stonesmile. — Might be the impulse applied by the decoupler
<discord->
Calvin_Maclure. — Yeah but it's right down the CoM.
<discord->
Calvin_Maclure. — It should not be making this happen...
<discord->
Stonesmile. — If you haven't already, test to set the decoupler force to 0
<discord->
Calvin_Maclure. — I usually do set them to zero. Cant recall if this one is at 0
<discord->
Calvin_Maclure. — Regardless, this thing is in orbit so... yeah
<_whitenotifier-9244>
[Principia] pleroy closed pull request #2698: Remove Normed and use Hilbert everywhere - https://git.io/JULwl
<_whitenotifier-9244>
[Principia] pleroy pushed 4 commits to master [+0/-2/±30] https://git.io/JULF0