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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@aeva @jon_valdes alright I think we just use data from sdss and reproject it for alpha centuri, blindly extrapolating for the correct date using the star velocity. so no complex orbital mechanics. However for the planetary bodies in solar system we use code derived from https://stjarnhimlen.se/comp/ppcomp.html
Word of caution about calculating these things on the GPU: implementations of trigonometric functions on the GPU are less accurate than you'd hope, and if you calculate a bunch of sin() and cos() for your view direction per pixel, they turn out not to be accurate enough for stable movement across a 60° fov on a 4K screen. Particularly Intel, which seems to barely pass the D3D precision requirements there...
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Word of caution about calculating these things on the GPU: implementations of trigonometric functions on the GPU are less accurate than you'd hope, and if you calculate a bunch of sin() and cos() for your view direction per pixel, they turn out not to be accurate enough for stable movement across a 60° fov on a 4K screen. Particularly Intel, which seems to barely pass the D3D precision requirements there...
@jon_valdes @aeva right, yeah I should also mention all that is done on the cpu, and with double precision. I'm not really sure if you can even squeeze it to work with f32.
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@jon_valdes @aeva right, yeah I should also mention all that is done on the cpu, and with double precision. I'm not really sure if you can even squeeze it to work with f32.
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@jon_valdes @dotstdy blessedly I'm planning on doing this on the cpu, but
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@jon_valdes @dotstdy blessedly I'm planning on doing this on the cpu, but
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@jon_valdes @dotstdy my laptop has a recent-ish Xe gpu
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@jon_valdes @dotstdy my laptop has a recent-ish Xe gpu
@jon_valdes @dotstdy it's bizarre seeing my 10 year old telephone's mali do better at... anything at all
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@jon_valdes @dotstdy it's bizarre seeing my 10 year old telephone's mali do better at... anything at all
@jon_valdes @dotstdy though I guess the corner the intel case is cutting is where the slope starts to level out so I guess that makes sense. are CPU trig functions just as bad?
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@jon_valdes @dotstdy though I guess the corner the intel case is cutting is where the slope starts to level out so I guess that makes sense. are CPU trig functions just as bad?
@jon_valdes @dotstdy would mollytime get a warmer, fuller sound if i switched to expensive software sine waves :3
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@jon_valdes @dotstdy my laptop has a recent-ish Xe gpu
Gli ultimi otto messaggi ricevuti dalla Federazione
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@enzoa24 Internazionale, RedHodCyber, Greenpeace (che ricordo, ma tante altre)
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Memory Integrity Enforcement Bolsters iPhone Security
https://tidbits.com/2025/09/12/memory-integrity-enforcement-bolsters-iphone-security
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5 di N
sarebbe ora di leggere e
FAR CAPIRE ALLE ISTITUZIONI
un articolo su
IL LATO OSCURO DELL'INFORMATICAquello che nel 1973 di
THE DARK SIDE OF THE MOON
dei Pink Floydera perfettamente percepito e
CALCATO [o altra parola?]
dalla Data Handling Division del CERNin un ambiente socialmente adeguato a gestire il digitale senza dipendere dagli interessi dei gestori dell'innovazione tecnologica
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Non è qualcosa che riguarda solo gli USA e il presente. Cose simili sono state fatte anche in passato e altrove.
Su due piedi mi ricordo di Jan Palach in Cecoslovacchia e di un monaco tibetano in Vietnam.
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@mohshbair
Ciao Mohammed, come stai tu?
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Ho fatto una fatica boia a tirare fuori gratitudine. Ho solo voglia di urlare. Mi sento soffocare e in trappola, che sensazione orrenda.
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@snow @prealpinux
Ecco, se mettono l’opzione va bene.
Una cosa che detestavo su Twitter era la citazione con commento. Perché in quel contesto veniva usato anche o soprattutto per mettere qualcuno alla berlina.
