egg changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Cauchy. We currently target 1.2.2. <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/
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<Tone> would pricipia work on microscales as well?
<UmbralRaptor> ?
<Tone> scale the velocitys/length’s up by say 10E6 so that it could easily simulate gravity of a 1kg object, believe if length’s scaled up by 10E6, masses would be scaled up by 10E18
<Tone> 1kg object becomes 10^24 kg I believe?
<Tone> 10^18 I mean
<UmbralRaptor> I'd have to check with egg on current floating point precision.
<UmbralRaptor> But rescaling objects seems like a problematic way of simulating gravity at that scale.
<Tone> I think if i remember right, ksp only deals max with around .1 m/s
<Tone> so scaling velocity um/s to be m/s would make it doable in ksp
<Tone> to simulate human gravity & radius
<Tone> 1Mm would essentially become a little over 1 yard
<Tone> Sorry; more i think about it, is actually macroscaling what I’m thinking of
* UmbralRaptor suspects that it would cause extra headaches want an Earth or the like. Also, you can run Principia without KSP. >_>
<Tone> Earth would go from 10^24 to 10^42 kg to essentially right the scales; easier to scale up than down
<Tone> Ant engine would actually give decent dv in that case
* UmbralRaptor breaks out the 128 bit floats.
<UmbralRaptor> But, uh, I'm not sure how increased masses would make a 315 s engine.
<UmbralRaptor> s/engine./engine better./
<Qboid> UmbralRaptor meant to say: But, uh, I'm not sure how increased masses would make a 315 s engine better.
<Tone> the seconds part of m/s is constant, no effect at all
<Tone> just rescaling the meters for that simplicity
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<Tone> that way orbital periods/velocitys and the like are accurate, as I think 10^-6 is about the right velocity scale needed for reasonable orbits for say a bowling ball around a human
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<UmbralRaptor> ;c sqrt(4*3.15169^2/(5.98e24*6.674e-11)*6.6e6^3)
<kmath> UmbralRaptor: 5349.900434552669
<UmbralRaptor> ;c sqrt(4*3.14159^2/(70*6.674e-11)*1.0^3)
<kmath> UmbralRaptor: 91925.79201575702
<UmbralRaptor> ;c 70/71
<kmath> UmbralRaptor: 0.9859154929577465
<UmbralRaptor> ;c 5*75/80
<kmath> UmbralRaptor: 4.6875
<Tone> how do you almost type the emoticon?
<UmbralRaptor> Uh, I'm just using a math function of the bot.
<Tone> how do i implement it?
<UmbralRaptor> Qboid's commands all are of the form ;letters
<UmbralRaptor> ;help
<kmath> UmbralRaptor: Commands: print_rpn rpn c youtube yt seen tell isup mission mission add mission del mission stats mission list mission search outcome add outcome del outcome search wolfram wa help roll spacedock wikipedia w rose quote quote add quote del quote list apod
<UmbralRaptor> Or do you mean programming a bot?
<Tone> chat room implementing it
<Tone> programing probably take alot longer to explain
<Tone> ;help
<kmath> Tone: Commands: print_rpn rpn c youtube yt seen tell isup mission mission add mission del mission stats mission list mission search outcome add outcome del outcome search wolfram wa help roll spacedock wikipedia w rose quote quote add quote del quote list apod
<UmbralRaptor> eg:
<UmbralRaptor> ;help apod
<kmath> UmbralRaptor: apod [DATE] Returns the NASA Astronomy Picture of the Day. DATE is optional and (probably) supports most date formats you can think of.
<UmbralRaptor> ;apod 2017-03-14
<kmath> UmbralRaptor: 2017-03-14 - A Dark Winter Sky over Monfragüe National Park in Spain - https://apod.nasa.gov/apod/image/1703/DarkSkyPark_Quinones_960.jpg
<UmbralRaptor> ;apod 2004-04-01
<kmath> UmbralRaptor: 2004-04-01 - April Fools Day More Intense On Mars - https://apod.nasa.gov/apod/image/0404/columbiahills_spirit_c1.jpg
<Tone> sqrt(16)
<UmbralRaptor> ;c sqrt(16)
<kmath> UmbralRaptor: 4.0
<UmbralRaptor> THe ;c is important
<Tone> yeah, that’s the emoticon i dont know how to type
<UmbralRaptor> The bot reads the chat, and respons as appropriate.
<UmbralRaptor> Does your keyboard not have a semicolon key?
<Tone> ;
<Tone> ;)
<UmbralRaptor> And then a c after the semicolon.
<Tone> (; c)
<Tone> ;c
<Tone> (; c) is how i almost type it, kk
<Tone> ;c -sqrt (16)
<kmath> Tone: -4.0
<Tone> Yes :)
<Tone> ;c G um^3/s^2
<kmath> Tone: Unknown token: gum
<UmbralRaptor> yay
<UmbralRaptor> Note that it's a pretty simple calculator.
<UmbralRaptor> For units, I'd suggest wolfram alpha (;wa)
<Tone> ;c 6.674e-11
<kmath> Tone: 6.674e-11
<Tone> * (1e6)^3
<Tone> ;C * (1e6)^3
<kmath> Tone: syntax error
<Tone> ;c 6.674e-11 * 1e6 * 1e6 * 1e6
<kmath> Tone: 66739999.99999999
<Tone> ;c 66730000 / 1e6
<kmath> Tone: 66.73
<Tone> 66740000/ 1e6
<Tone> ;c 66740000/ 1e6
<kmath> Tone: 66.74
<Tone> 66740000/ 254000^2
<Tone> :c 66740000/ 254000^2
<Tone> ;c 66740000/ 254000
<kmath> Tone: 262.755905511811
<Tone> ;c 262.455905511811/ 254000
<kmath> Tone: 0.001033290966581933
<Tone> ;c sqrt(264.755905511811)
<kmath> Tone: 16.271321566234594
<Tone> believe this means Vc= 16.271321566234594 um/s for a body orbiting 1 kg object 1 inch away
<Tone> do I have it right or am i missing somewthing
<Tone> yeah, i did
<UmbralRaptor> ;c sqrt(6.674e-11/(0.3048/12))
<kmath> UmbralRaptor: 5.1259721566919474e-05
<Tone> ;c sqrt(262.755905511811)
<kmath> Tone: 16.209747237752076
<UmbralRaptor> ;c sqrt(6.674e-11/2.54e-2)
<kmath> UmbralRaptor: 5.125972156691948e-05
<UmbralRaptor> hrm
<Tone> so you get 51.25972156691948 um/s
<UmbralRaptor> yeah
<Tone> ;c sqrt (-4)
<kmath> Tone: Numerical argument is out of domain - "sqrt"
<Tone> only reals; ok
<UmbralRaptor> ;wa sqrt(-4)
<kmath> UmbralRaptor: sqrt(-4) = 2 
<UmbralRaptor> !u 
<Qboid> U+F74E PRIVATE USE-F74E ()
<UmbralRaptor> Note to self, don't be too tired to remember kmath and Qboid are different bots.
* UmbralRaptor stabs Wolfram in the unicode codepoint choice.
<Tone> how do I implement qQboid?
<Tone> ;a sqrt(-4)
<Tone> ;w sqrt(-4)
<Tone> ;wa sqrt(-4)
<kmath> Tone: sqrt(-4) = 2 
<Tone> there we go
<Tone> ahh, radius is 25400 not 254000 for an inch
<UmbralRaptor> Hrm. Can't find qboid's code on github. I think it's Thomas|AWAY's bot.
<Tone> ;c 6740000/25400
<kmath> Tone: 265.3543307086614
<Tone> ;c 66740000/25400
<kmath> Tone: 2627.5590551181103
<Tone> ;c 2627.5590551181104/25400
<kmath> Tone: 0.10344720689441379
<Tone> Ac would be this :)
<Tone> ;c sqrt(2627.5590551181103)
<kmath> Tone: 51.25972156691948
<Tone> Vc is this :)
<Tone> Ac better than Gilly? don’t remember
<UmbralRaptor> Ac?
<UmbralRaptor> Acceleration?
<Tone> pretending it is of couse m/s^2
<Tone> yes
<Tone> yes, is double Gilly’s using my rescale
<Tone> whew
<UmbralRaptor> hm
<Tone> Which I believe I can do by just rescaling the mass X 10^18
<Tone> Ac (1kg)= 0.10344720689441379 um/s^2
<Tone> Vc being the 51.25972156691948 um/s
<Tone> so pretending the radius/ velocity gets rescaled from umeters to meters means I could simulate in normal ksp a mass of 10^18 kg
<Tone> How to run Principia without ksp?
<Tone> ;c 2^127
<kmath> Tone: 1.7014118346046923e+38
<Tone> ;c 2^255
<kmath> Tone: 5.78960446186581e+76
<Tone> this what they mean by float?
<Tone> ;c 2^2^2
<kmath> Tone: 16.0
<Tone> ;c 2^2^127
<kmath> Tone: Infinity
<Tone> ;c 2^2^5
<kmath> Tone: 4294967296.0
<Tone> ;c 2^2^2^2^2
<kmath> Tone: Infinity
<Tone> ;c 2^2^2^2
<kmath> Tone: 65536.0
<Tone> ;c 3^3^3
<kmath> Tone: 7625597484987.0
<Tone> ;c 10^100
<kmath> Tone: 1.0e+100
<Tone> ;c 10^20
<kmath> Tone: 1.0e+20
<UmbralRaptor> I recall something about it with building tests, but you'd want to ask egg|zzz|egg for details.
<Tone> ;c 10^1000
<kmath> Tone: Infinity
<Tone> ;c 10^101
<kmath> Tone: 1.0e+101
<Tone> ;c 10^200
<kmath> Tone: 1.0e+200
<Tone> ;c 10^500
<kmath> Tone: Infinity
<Tone> ;c 10^250
<kmath> Tone: 1.0e+250
<Tone> ;c 10^300
<kmath> Tone: 1.0e+300
<Tone> ;c 10^499
<kmath> Tone: Infinity
<Tone> ;c 10^400
<kmath> Tone: Infinity
<Tone> ;c 10^310
<kmath> Tone: Infinity
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* egg|zzz|egg glares at the backlog
<egg|zzz|egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a mandelbrofl-like tombstone
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<Thomas> UmbralRaptor: https://github.com/StollD/QIRC
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<UmbralRaptor> ...mandelbrofl?
<UmbralRaptor> !wpn egg|zzz|egg
* Qboid gives egg|zzz|egg a composite piston
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<GH> [Principia] eggrobin opened issue #1456: Interactions with RemoteTech https://git.io/vQa2j
<GH> [Principia] eggrobin opened issue #1457: Show vessel trajectories in the tracking station https://git.io/vQaa0
<GH> [Principia] eggrobin opened issue #1458: The stock automated switch between Surface and Orbit speed display mode is intrusive https://git.io/vQaVY
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<GH> [Principia] eggrobin commented on issue #1452: Update: I do not see the message ```Skipping AdvanceTime and SetBodyFrames while waiting for the vessel to be fully ready (see #1421).``` in the log when reproducing the issue, so it is probably something else. https://git.io/vQaHr
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<GH> [Principia] eggrobin commented on issue #1452: See the following link for the diff of the adapter between the state when we tested solved the ladder bug (where EVA still worked) and Cauchy: https://github.com/mockingbirdnest/Principia/compare/b7f6b8644b2a4c37b72ea26af5a8b6153c408bd9...2017062403-Cauchy.... https://git.io/vQaF5
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<GH> [Principia] eggrobin commented on issue #1452: That seems to be it, I'll have to figure out why it breaks EVA spawning though, because we still need #1307 to stay fixed. https://git.io/vQaNz
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