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<Trash_Man> How do you guys handle time warp?
<Trash_Man> I made my own runge kutta n body simulator in python, but can't figure out how to implement something similar to timewarp
<egg|nomz|egg> same? time just goes faster?
<egg|nomz|egg> there's no fundamental difference
<Trash_Man> I guess python and/or my computer sucks
<Trash_Man> So you just do more simulation ticks per game tick?
<Trash_Man> Do you use any methods to improve force calculation time like barnes hut simulation?
<Trash_Man> Yeah I just ran it through teamviewer on my desktop, it works fine at higher speeds
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<egg> yeah, you just integrate until you catch up with the game
<egg> I mean eventually you'll be bound by the performance of your integrator, and things get interesting
<egg> and then you'll want to get the fastest integrator you can for the desired accuracy
<egg> but it's just the same problem
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<Trash_Man> Had to reconnect because of network issues
<Trash_Man> What h factor do you use for your integrator
<egg> stepsize you mean?
<egg> for the planets we go with 45 min; that's a bit long for phobos, but otherwise it seems ok
<egg> we'd have to test things more properly tbh
<Trash_Man> I don't know what to call it, the page where I got my calculations from called it the h factor
<Trash_Man> but yeah it should be the stepsize
<Trash_Man> is it 45 minutes in seconds?
<egg> the step size is typically called h, but it's not really a factor
<Trash_Man> h coefficient?
<egg> Trash_Man: what do you mean in seconds
<egg> 45 min is 45 min
<Trash_Man> so just 45?
<egg> doesn't matter if you convert it in weeks or ns
<egg> it's 45 minutes
<egg> convert that to whichever unit you use for your internal representation
<Trash_Man> what do you convert it to
<egg> I don't know whether your time unit is days or seconds or julian years or nanoseconds
<egg> Trash_Man: that's not the question you should ask; what time unit do *you* use
<Trash_Man> I probably use seconds
<egg> then you have your answer
<Trash_Man> yay
<egg> 45 minutes isn't 45, it's 45 minutes; 45 seconds isn't 45, it's 45 seconds; units aren't things that you can kill off
<egg> quantities are dimensionful
<Trash_Man> I understand
<Trash_Man> Sorry for all the questions
<Trash_Man> I've started this stuff pretty recently
<Trash_Man> like a month ago
<GH> [Principia] eggrobin opened pull request #1268: Remove some useless traces (master...useless-traces) https://git.io/vy9qq
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<GH> [Principia] eggrobin closed pull request #1268: Remove some useless traces (master...useless-traces) https://git.io/vy9qq
<GH> [Principia] eggrobin opened pull request #1269: Clangify for Cardano (master...clangify-cardano) https://git.io/vy9z2
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<UmbralRaptor> !tell Trash_Man astropy.units is a thing, consider messing with it?
<Qboid> UmbralRaptor: I'll redirect this as soon as they are around.
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<UmbralRaptor> Also, it's a mildly disconcerting question. In that it seems like one of those "knows code but not physics" questions?
<egg> UmbralRaptor: I guess?
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<GH> [Principia] eggrobin opened pull request #1270: Sequential death tests (master...sequential-death-tests) https://git.io/vyHYT
<GH> [Principia] pleroy closed pull request #1270: Sequential death tests (master...sequential-death-tests) https://git.io/vyHYT
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<GH> [Principia] pleroy pushed 5 new commits to master: https://git.io/vyHBw
<GH> Principia/master e718580 root: clangify
<GH> Principia/master 4cee0d2 Robin Leroy: Merge remote-tracking branch 'la-vache/master' into clangify-cardano
<GH> Principia/master 77d97de root: -lsupc++, thanks @whitequark
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