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
-
@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
-
@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
-
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
-
@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
-
@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
-
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
-
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?
-
@aeva are you modeling real life or an approximation of it?
@efi yes
-
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
-
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.
-
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.
-
@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
@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
-
@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
@halcy the real problem here is that academic astronomy best practice is to tie everything into spherical coordinates on the firmament so they can factor out the earth enough that you can pretend it is a fixed vantage point that doesn't spin, and if god forbid you do need to tie an observation to geographic coordinates for some reason i guess you just burn an undergrad on it and not sully yourself with the indignity
-
@halcy the real problem here is that academic astronomy best practice is to tie everything into spherical coordinates on the firmament so they can factor out the earth enough that you can pretend it is a fixed vantage point that doesn't spin, and if god forbid you do need to tie an observation to geographic coordinates for some reason i guess you just burn an undergrad on it and not sully yourself with the indignity
-
@halcy the real problem here is that academic astronomy best practice is to tie everything into spherical coordinates on the firmament so they can factor out the earth enough that you can pretend it is a fixed vantage point that doesn't spin, and if god forbid you do need to tie an observation to geographic coordinates for some reason i guess you just burn an undergrad on it and not sully yourself with the indignity
@halcy i've got a feeling that this is what a self taught programmer feels when they try to work out how to sort stuff faster and everything they find is either programmers telling eachother to just use a library or academic formalist nonsense
-
-
Gli ultimi otto messaggi ricevuti dalla Federazione
-
Oggi come secondo lenticchie e zucchine grigliate ovviamente con abbondante #curcuma e pepe nero
#masterchef
-
The witch hunt
#Charlie_kirk
https://www.theguardian.com/us-news/2025/sep/13/charlie-kirk-shooting-people-fired-social-media?CMP=Share_iOSApp_Other
-
Per favore, se ognuno di noi si facesse carico di una famiglia palestinese sarebbe molto. Io lo sto facendo, fatelo anche voi, si può rinunciare a qualcosa per aiutarli. Vi prego 🙏
-
@aral
Lo sto seguendo, ci scriviamo, lo aiuto per quanto posso. So che oggi non sta bene, sono così triste 💔
-
Il tempo di preparazione di un pasto è inversamente proporzionale a quanto ci vuole per mangiarlo. Mi pare un'ingiustizia.
-
Mohammed is Anne Frank.
Only he’s not writing to you. He is showing you exactly what is happening.
And he’s still here. Still alive. Still trying to survive genocide.
Can you see him? Can you hear him?
Will you help?
#Gaza #Palestine #journalism #genocide #israel #genocide #StopIsrael #StopTheGenocide #FreePalestine https://mastodon.social/@mohshbair/115185787787498587
-
Adoro Law and Order SVU e la Mariska, ma un po' troppo antiabortista e retorica spicciola sulla forza di chi ha sofferto. Starò invecchiando.
-
Hi, friends. I'm gonna start sending appeal letters to writer protection associations in Netherlands in the next few days, so they can get me out of here.
there's humanitarian evacuation is happening for students & writers who have obtained European visas.
If u have any information pls let me know.
-Nederlands Letterenfonds (Dutch Foundation for Literature)
-Amsterdam Writers’ Residence Programme
-NIAS & Dutch Foundation for Literature — Writer-in-Residence Fellowship
