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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@jon_valdes i found this a few hours ago http://www.geoastro.de/elevazmoon/basics/index.htm haven't had a chance to look at it in detail but it looked promising at first skim
@aeva @jon_valdes I'm trying to remember what program we use to generate location accurate star charts in Avatar and Division... Maybe it can do the moon as well, will look it up later.
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@aeva @jon_valdes I'm trying to remember what program we use to generate location accurate star charts in Avatar and Division... Maybe it can do the moon as well, will look it up later.
@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
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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
Gli ultimi otto messaggi ricevuti dalla Federazione
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@enzoa24 non ho il loro seguito e lasciare Instagram mi ansiava, ma anche rimanerci. Leggere il loro programma mi ha comunque incoraggiato. L'ho fatto in modo più istintivo e meno organizzato. Non avere il loro seguito ha anche dei vantaggi...
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@adriananselmo Buongiorno. Anch'io ho iniziato a seguire molto Valigia Blu, soprattutto dopo la loro scelta di abbandonare sia Facebook sia Twitter.
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@enzoa24 valigia blu... che mi ha anche ispirato a mollare Instagram
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@coso_come_se_chiama Pure l'intelligenza esiste da prima di Rampini, e in effetti non è automatico che lui ce l'abbia.
Come dargli torto?!
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Quali fonti d'informazioni italofone (blog, testate giornalistiche, agenzie di stampa) conoscete su Mastodon/sul Fediverso? Mi piacerebbe sapere quali hanno fatto il grande passo di spostarsi di qua.
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“But it is hard not to notice that, in the aggregate, something poisonous is in the architecture of its platforms and the way that our technologies demand not just our attention, but our most heightened emotions,”
Charlie Warzel wrote in his piece here:
https://www.theatlantic.com/technology/archive/2025/09/charlie-kirk-assassination-online-reaction/684201/?gift=bQgJMMVzeo8RHHcE1_KM0ZY_8qLLAueznc8lg3WkEto&utm_source=copy-link&utm_medium=social&utm_campaign=share
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Here are some pieces and journalists I actually learnt something from: @justinling on Kirk’s position in the MAGA movement including this line:
“In the same way that his beliefs do not justify his murder, his murder can’t justify his beliefs either.”
https://www.bugeyedandshameless.com/p/who-was-charlie-kirk-anyway
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The New York Times has rarely felt as hopelessly out of its depth as in the past two days or so. There is still much I admire, many journalists I respect and trust, but on the Charlie Kirk assassination it simply hasn’t been very informative - not to mention some atrocious opinion “journalism”.
