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learning c++ and c# and how to use unity and meteorology and writing a climate sim of sorts. eventual goal is to be able to interactively modify the global heightmap and have the climate (calculated on the GPU) react instantly. right now all ive got is a model of ferrel cells n monsoon rains. loooong way to go
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# ¿ Oct 1, 2023 19:41 |
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Werthog 95 posted:i mean obviously reading stuff's worthwhile (just got my smart dog book) but i forget all that poo poo if i don't use it this really got on my nerves as a undergrad, because i used to burn whole weeks on poo poo like Concrete Mathematics or misner, wheeler & thorne or artin's Algebra, for funsies. then three months later id have forgotten it all, despite having done all the fukkin exercises. came up with a solution in senior year: http://ankisrs.net every bit of information i read in senior year went on an anki flashcard. there were like 3,000 of them by the end, and id sit down every night and pile through the ones it said i hadn't seen in a while (usually less than 50 'cause of the exponential falloff associated w/ recall). owned my finals thanks to it, but unfortunately i stopped last october b/c i was crazy-busy. mistake. i've forgotten it all ![]() coffeetable fucked around with this message at 00:20 on Jul 24, 2013 |
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WorkingPeer posted:not a computer thing, but i want to take this part-time woodworking course, if only they'd publish start dates and fees every time i see i a nice bit of woodwork, i fleetingly consider abandoning software, abandoning mathematics and just going back to my hometown's polytech to learn carpentry gonna have a workshop one day
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spankmeister posted:i have an interest in nuclear physics but it's not like you cab build a reactor in your back yard. it's not nuclear but http://www.instructables.com/id/DIY-Electron-Accelerator-A-Cathode-Ray-Tube-in-a-/ and if you can build a CRT, you just need a tungsten target to get xrays which are really dangerous and probably illegal or something
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SRQ posted:The NSA now has an entire division watching you. have uavs been legislated on yet like if some environmental nut flew one out over $industrial_complex, what would they gently caress him with (was gonna say groom lake, but lol espionage act)
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there's a RC aircraft thread over in the DIY forum. i didn't realise starter quadrocopters were down to like $40 nowadays. might have to get one myself
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Q: Are UAVs legal in the Canada? A: Unmanned Aerial vehicles are permitted to fly in Canada when they meet "Model aircraft" conditions set out in the Canadian Aviation Regulations or the operator has a Special Flight Operations Certificate(SFOC). Q: What makes a UAV a model aircraft in the eyes of Transport Canada(TC)? A: "Model aircraft" means an aircraft, the total weight of which does not exceed 35 kg (77.2 pounds), that is mechanically driven or launched into flight for recreational purposes. By definition a UAV is no longer a model aircraft when: - Owned by a company not an individual. -Used for profit.
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35kg is a big goddamn model aircraft
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should've given you a link too, sry http://diydrones.com/profiles/blogs/uav-faqs-for-canada tl;dr it's free, and all they want is you to demonstrate you're not gonna kill anyone or upset air traffic controllers
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Bloody posted:idk much about UAVs though last time i was loving around with GPS and inertial navigation was on a boat, and GPS was more than adequate for our needs. yeah GPS is accurate to within a few meters, and it's improving every year. there's also the ESA galileo constellation going up between 2014-2019, with an open signal accurate to within <1m + a commercial signal accurate to <1cm
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vapid cutlery posted:how was the military ok with that they weren't the frequencies it was originally supposed to use was close enough to the GPS frequencies that one system couldn't be jammed without jamming the other. so the US had a hissy fit and said that if Galileo was ever used to guide munitions against the US, they'd respond by shooting all the satellites down. so now Galileo's on a different, possibly less accurate, set of frequencies. ooh-rah. coffeetable fucked around with this message at 11:08 on Jul 28, 2013 |
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Ana5000 posted:What stops them from using gps to shopt rockits to the us? Will they just toggle "encryption on" and all non-military gps devices just stop working? well until ten years, civilian GPS signals were purposefully degraded by the US military so they'd only be accurate to a hundred meters or so. in 2000 though the system was upgraded so that the military could block the signal over any geographic area they cared to, and the degradation system (called Selective Availability) was turned off. Ana5000 posted:And what's stopping them from adding a camera and image recognition software for the missile to periodically literally look where it's going? they do. most any weapon that uses GPS also has inertial navigation or celestial navigation or terrain-following instruments, b/c the assumption is that in the event of a major war, GPS isn't gonna be around for long. thing is that those instruments are all really fukkin hard to design + build, while a GPS circuit a couple of dollars from ebay.
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Bloody posted:my work at least has the potential to be lifechanging for millions of people in a few years movax posted:thanks to math we can send a giant rocket from our country to an accurate target (200m CEP publicly) across the globe Bloody posted:do you work on these things? are we secretly coworkers? i hope not.
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dur posted:i made progress on my coffee table this weekend jfc is that 3? inches thick how many elephants are planning on keeping on it
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Moist von Lipwig posted:just finished the first little part of my project and learned some javascript and jquery along the way a) this is cool b) you'll probably find this interesting (if you haven't seen it already) http://rodrigoborges.hospedagemdesites.ws/principal/pdf/avaliacao_02.pdf if you're not familiar w/ stats, say n ill chat you through it coffeetable fucked around with this message at 12:50 on Aug 1, 2013 |
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how many Who riffs make it into yr jamming
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Optimus_Rhyme posted:Mainframe security research (cause gently caress IBM thats why). are you talking about modern mainframes or about stuff from the 1980s that's still chugging along? b/c i honestly did not know mainframes were still A Thing (i am a childe) i also hadn't thought about how loltastic the security would be in software designed under ye olde assumption that all users would be in the same room
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Sagebrush posted:designing myself a new desk. i have these great massive solid steel legs from my old desk cause when i moved i had to throw out the desk top cause it was way too big and heavy (about 6 feet long 3 wide). it was ugly cheap formica kind of material anyway. so am designing myself a new hardwood top that i'm gonna cnc on the router. debating what type of wood to use and how many hidden compartments to install i am jealous of yr router's ability to take 6'x3' workpieces ps if you're splurging, go for teak. teak is fantastic for countertops - it's what all those old school chemistry benches are made from. teak, epoxy base coats, varnish top coats. watch a pile of videos on varnishing if you haven't done it before, b/c it's easy to gently caress up
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01011001 posted:https://www.youtube.com/watch?v=zyiY_3cyEuo here's a robutt. only fell in once filming it, too owns owns owns
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WorkingPeer posted:yospos i'm going insane. it's poo poo i don't know all the way down. this is a great thing you're doing, jumping in at the deep end. you'll learn an unbelievable amount if you stick with it, but it's going to take a while and you can't hope to do it all in one go. what you need to do is come up with some subproblems that will be easier to solve. that'll stop you from burning out. in this case, they could be things like
what you definitely shouldn't do is worry about all these things at once. come up with a list of two or three small subproblems, and forget about everything that doesn't contribute to solving those problems. you can come back and make a full design later on, and it'll be a much better design for all that you've learnt from the subproblems.
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example: for my climate sim, my early subproblems are
coffeetable fucked around with this message at 05:12 on Aug 29, 2013 |
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WorkingPeer posted:phew, thanks. it's good to know that i'm not being too stupid for jumping into this head-first. Mido posted:yo could you recommend a good simulator? i haven't played with electronics in years, and my knowledge isn't near extensive enough to make any recommendations on either of these, sorry ![]()
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ol qwerty bastard posted:hm okay clearly my ball collision algorithm needs work i like your version of physics. it's more fun. (by any chance did you design it so collision boundaries strongly repel eachother? because then if two boundaries are found to be intersecting at the end of a time step, the repulsion would force one ball into the other)
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ol qwerty bastard posted:it's supposed to detect when the distance is less than (r1+r2) and then apply a force to each based on their velocities and masses post yr code
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ol qwerty bastard posted:yeah i'm not understanding that equation either, but it looks like the slowing down might be caused by the accleration being applied in the wrong direction? see if you can simulate the Theia impact ![]()
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hubris.height posted:can't wrap my head around what kind of equation will result in smooth, quick, random, but manageable acceleration. it would help if i put an upper limit on it too do you want smooth acceleration or a smooth trajectory? coffeetable fucked around with this message at 19:38 on Aug 22, 2013 |
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hubris.height posted:you edited out the perlin noise thing which i'm doing reading on right now. its interesting but not really super relevant i think but i dunno it could be interesting yeah i originally mentioned it cause it's the canonical example of 'smooth randomness', but edited it out cause you're right it's not very relevant e: edited again now that I've remembered my high school physics properly e2: y'know what I'm gonna step suggesting things until I've had some sleep coffeetable fucked around with this message at 19:50 on Aug 22, 2013 |
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WorkingPeer posted:i'm really loving learning about electronics. this enthusiastic australian man with a slightly annoying voice is the best: i want that tshirt no i will not fix your computer
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ol qwerty bastard posted:this week's project: same as last week, but now in THREETHREETHREEDEEDEEDEE qwerty go download + play with Unity3D. you will be suitably impressed. you can manipulate as much or as little of the low-level stuff as you want. (i spent the day w/ a very similar blue sphere. trying to implement a player-manipulable mesh in such a way that when i scrap spherical coords in favour of a cubed sphere, it won't break everything)
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ol qwerty bastard posted:but at least when i've got all these basic functions, i can just call them when i'm doing 3d stuff and i don't have to think about angles and cosines and all that bullshit ol qwerty bastard posted:oh my god vectors suck so much btw rather than doing v_add(v1, v2), just overload (+) so that you can write v1+v2 instead http://docs.python.org/2/reference/datamodel.html#special-method-names coffeetable fucked around with this message at 18:55 on Aug 27, 2013 |
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cps: discovered interfaces break large parts of unity. welp.
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oh gently caress my eyes
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cps: got unity rendering a primitive (constant) wind map on my interactively-deformable blue sphere![]() tomorrow: interfacing the primitive fluid simulator w/ the primitive wind map coffeetable fucked around with this message at 05:17 on Aug 29, 2013 |
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ol qwerty bastard posted:now it gets turbulent flow (that currently builds up and makes it go all hosed eventually because i haven't written any sort of proper planet-spin-is-imparting-momentum-to-atmosphere stuff each post gets cooler coriolis acceleration should only take a moment to implement, if you're interested: taking the x axis to be pointing east and the y axis to be pointing north, you want a point with velocity (u,v) to experience an acceleration 4*Pi*R*sin(L)/T (v, -u) where R is the radius of the planet T is the length of its day L is the latitude of the point this might produce some weird behaviour because the geometry you've got in that vid is of a cylinder rather than a sphere, but try it and see ![]() coffeetable fucked around with this message at 20:34 on Aug 30, 2013 |
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what's the generator trying to optimize/what're the constraints other than "all rooms must be accessible?"
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Miyamotos RGB NES posted:in other news i would also like to mod my sodastream, as goony as that sounds, because i turn water into seltzer like Jesus did and these replacement canisters are expensive and i read you can buy a fitting that converts the sodastream so it can use a huge as hell CO2 tank that will last literal years. but i am reading that "those CO2 tanks are not meant for food and will taste terrible and probably kill you" but i am just assuming that's Sodastream, Inc. astroturfing on wordpress comments there can certainly be nasty impurities in CO2 meant for industrial use, but anything rated food-grade or similar will be abs. fine
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Miyamotos RGB NES posted:i literally dont even know what to type into google 1) google up any local catering company 2) phone them (or email them if you're a huge goon) n ask where they usually buy their CO2
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Jonny 290 posted:yeah the cores of uav's and little flyin things are commodity now. at this point its how you apply them The Power Line Urban Sentry (PLUS) program seeks to crea
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are you doing the shadows on the CPU or GPU
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# ¿ Oct 1, 2023 19:41 |
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Sagebrush posted:that said eh what's the worst that could happen?
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