i nerd sniped myself tonight and i imagine the NSA operative who is assigned to me is very confused by the increasingly erratic and frustrated google searches for HOW DO I CALCULATE THE MOON WHERE IS THE MOON
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anyways, somewhere in peru there's a town that is legally somewhere between 100 meters and 1 km off from where it actually is, and it'll be really funny if it ever gets big enough for that to actually matter
@aeva wouldn’t it matter more for smaller cities?
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@aeva I mean borders and locations of civil territories are actually definitively imaginary so that tracks.
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one of the benchmarks we wanted to use had a typos where two digits were transposed preventing us from using it because otherwise none of our math would have added up. the professor rejected my proposal to simply interpolate the error across all our data points to make the more convenient benchmark work out lol. so instead we had to chain our data points to a much less convenient datum which iirc involved us trespassing into a reservoir.
@aeva at least all the measurement units are nailed down.
https://www.nist.gov/pml/us-surveyfoot
Well, ok it could be worse. -
@aeva wouldn’t it matter more for smaller cities?
@luana I figure the smaller the city the lower the odds you end up with grosstopically overlapping structures, legally speaking
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@aeva at least all the measurement units are nailed down.
https://www.nist.gov/pml/us-surveyfoot
Well, ok it could be worse.@kevingranade they did eventually redefine the kilogram as something other than robespierre's evaporating left nut at least
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it's a good thing countries are pretty short lived geologically speaking otherwise plate tectonics would cause a lot of problems
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it's a good thing countries are pretty short lived geologically speaking otherwise plate tectonics would cause a lot of problems
@aeva I mean, we already see similar issues with geographic borders. Especially rivers, because rivers really don't like to stay put.
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@aeva I mean, we already see similar issues with geographic borders. Especially rivers, because rivers really don't like to stay put.
@ataylor nothing a liberal application of hubris can't pretend to fix
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@aeva "We shall put this river in a box and then everything's fine!"
Cue decades of flooding.
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@demofox @dotstdy @jon_valdes assuming I didn't screw anything up adapting Jon's shader toy, the 30 iteration soft sin also has the surprising property of being able to clip out of the expected -1.0 to 1.0 output range https://github.com/Aeva/mollytime/blob/af58e9237903856b6193a116ae6408038dc47d4a/src/patch.cpp#L319
@aeva @demofox @dotstdy
Yeah, I should have mentioned I'm not 100% sure of the quality of that SW sin implementation. I grabbed it from the internets and hoped the kind stranger that wrote it knew what they were doing.I was more interested in the GPU differences at the time, and this impl was good enough to show those clearly
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@aeva @demofox @dotstdy
Yeah, I should have mentioned I'm not 100% sure of the quality of that SW sin implementation. I grabbed it from the internets and hoped the kind stranger that wrote it knew what they were doing.I was more interested in the GPU differences at the time, and this impl was good enough to show those clearly
@jon_valdes @demofox @dotstdy well I can tell from eyeballing it that it definitely produces a smoother gradient than the hw version
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it's a good thing countries are pretty short lived geologically speaking otherwise plate tectonics would cause a lot of problems
@aeva I mean it's causing enough problems with gps they have dedicated stations just to measure it and to recalibrate
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@aeva I mean it's causing enough problems with gps they have dedicated stations just to measure it and to recalibrate
@aeva oh and the whole maps rescanning the whole city every now and then thing
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@aeva oh and the whole maps rescanning the whole city every now and then thing
@pupxel i think they continuously re-map cities because of construction not plate tectonics
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it's a good thing countries are pretty short lived geologically speaking otherwise plate tectonics would cause a lot of problems
ok so back to the moon thing, i found another resource and i think i understand the why behind the asinine coordinate systems a little better but it also glosses over the math so it's kinda useless at the same time. i'm tempted to just make shit up and move on, but it would bother me that the function was wrong if i did that
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ok so back to the moon thing, i found another resource and i think i understand the why behind the asinine coordinate systems a little better but it also glosses over the math so it's kinda useless at the same time. i'm tempted to just make shit up and move on, but it would bother me that the function was wrong if i did that
@aeva are you modeling real life or an approximation of it?
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@aeva are you modeling real life or an approximation of it?
@efi yes
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ok so back to the moon thing, i found another resource and i think i understand the why behind the asinine coordinate systems a little better but it also glosses over the math so it's kinda useless at the same time. i'm tempted to just make shit up and move on, but it would bother me that the function was wrong if i did that
@aeva is this one of those things where the approximate solution that drifts from reality by 0.0004% every year is like 3 lines and the more correct one is 5 pages of dense research and no one who writes about it is concerned with the idea that a reader may be a beginner and not know the difference
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ok so back to the moon thing, i found another resource and i think i understand the why behind the asinine coordinate systems a little better but it also glosses over the math so it's kinda useless at the same time. i'm tempted to just make shit up and move on, but it would bother me that the function was wrong if i did that
@aeva I love the way everyone uses different names for parameters, and does everything from the POV of an observational astronomer ... Really useful for simulation work.
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ok so back to the moon thing, i found another resource and i think i understand the why behind the asinine coordinate systems a little better but it also glosses over the math so it's kinda useless at the same time. i'm tempted to just make shit up and move on, but it would bother me that the function was wrong if i did that
@aeva i believe all our physical models diverge from reality on a long enough timescale. even quantum mechanics. every model is lossy compression / fitting of reality that we extrapolate from, starting at the time that the underlying measurements were taken.
best thing i can think of is measure exact position of celestial bodies, then run a sufficiently detailed n-body sim with best guesses for all state we can not measure, starting at that point. and then restart every year.
Gli ultimi otto messaggi ricevuti dalla Federazione
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Droni non noti hanno attaccato una raffineria di petrolio a Kirishi (KINEF) nella regione di Leningrado. Di gran lunga la più grande raffineria nel nord-ovest della Russia, circa 20 milioni di tonnellate di petrolio all'anno
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@snow velate minacce? velate neanche tanto...
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@Gina
Trying to get one or the other is hard enough. Im not even sure socialism exists anymore.
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Mi chiedo perché giornalisti e responsabili di programmi continuino a interpellare #Odifreddi. Non parlo di Odifreddi accademico e matematico, per quello ci sono pubblicazioni scientifiche e un contesto accademico. L'identità pubblica di Odifreddi invece è quella che si è abilmente costruito a furia di teatrini da due spicci, in trasmissioni da due spicci, nei litigi in diretta con prelati e vescovi bigotti. Un format da Grande Fratello che fa leva sul banale e l'osceno per un po' di notorietà.
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@piero interessante, grazie! Resto d'accordo con l'Accademia della Crusca. Ad ogni modo, ci si arrovella su queste cose quando poi a mancare sono proprio le basi del rispetto.
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@halcy there's no closed form solution at all and from what i can tell the good solutions need to be rejiggered every few decades to stay accurate
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@aeva i believe all our physical models diverge from reality on a long enough timescale. even quantum mechanics. every model is lossy compression / fitting of reality that we extrapolate from, starting at the time that the underlying measurements were taken.
best thing i can think of is measure exact position of celestial bodies, then run a sufficiently detailed n-body sim with best guesses for all state we can not measure, starting at that point. and then restart every year.
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@aeva I love the way everyone uses different names for parameters, and does everything from the POV of an observational astronomer ... Really useful for simulation work.
