#robotics Logs

Apr 27 2017

09:42 AM rue_house: weyland|yutani, yea, what!?
10:35 AM robotustra: morning
11:12 AM veverak: deshipu: when you debug walking robots
11:12 AM veverak: how "bad" is hexapod with middle pair lifted and offline comparet to quadruped?
11:18 AM deshipu: should be the same
11:18 AM deshipu: as long as you use a quadruped gait
11:19 AM veverak: yeah
11:19 AM veverak: figured that it would be best for me to start the conversion and have one heaxpod
04:46 PM anniepoo: fiberglassing the shell
04:46 PM anniepoo: 8cP Have decided I don't like fiberglassing
04:56 PM SpeedEvil: :)
04:56 PM SpeedEvil: ventilation is the best
04:56 PM SpeedEvil: Also gloves
04:59 PM anniepoo: gloves, dust mask, safety glasses
05:00 PM anniepoo: I'm doing it a section at a time, partly because I wantto lay it down on other side, but partly becausee I'm only willing to do it for a certain length of time
05:02 PM SpeedEvil: supplied air can help a lot too
05:02 PM anniepoo: it's strange, I don't find the fumes that bad
05:02 PM anniepoo: Kevin's complaining about them
05:03 PM anniepoo: Kevin ate one of those Yakisoba meals for lunch, that smelled worse to me
05:03 PM anniepoo: aybe my brain cells are already fried
05:04 PM SpeedEvil: Smells are ridiculously individual
05:04 PM SpeedEvil: And cultural and emotional
06:12 PM solol: sup
06:13 PM noproto: o/
06:13 PM solol: what is it called when they remodel 3D layouts with a camera/computer? is it 3D interpolating?
06:13 PM solol: someone here would know
06:14 PM Tom_L: what are you trying to acomplish?
06:14 PM solol: creating a 3D model from a camera
06:14 PM solol: im not even sure how they do it
06:14 PM solol: but what is it called
06:14 PM Tom_L: laser scanner
06:14 PM solol: it's called something though
06:15 PM solol: wouldn't a laser scanner be slower than a camera/computer?
06:15 PM Tom_L: not the ones i've seen
06:16 PM solol: how fast would a laser scanner do like a pile of clothes or something?
06:18 PM Tom_L: accuracy will somewhat determine the speed
06:18 PM solol: does a laser scanner show shadows?
06:18 PM Tom_L: depends on the scanner
06:19 PM anniepoo: you're trying to reconstruct the 3D scene using successive images?
06:19 PM anniepoo: simultaneous localization and mapping
06:19 PM anniepoo: SLAM
06:19 PM Tom_L: the ones i've seen can be both very accurate and yet map an entire room
06:20 PM solol: slam
06:20 PM anniepoo: solol, you're trying to do it from a 2D camera mounted on a robot?
06:20 PM solol: probably
06:20 PM solol: i was wondering how that's coming along for people
06:20 PM solol: i wasn't really up to trying it yet
06:20 PM anniepoo: Tom's right, having a structured light camera or laser scanner (LIDAR) system is more accurate
06:21 PM anniepoo: it works, there are packages to do it.
06:21 PM anniepoo: it works best in environments with lots of 'stuff' in them
06:22 PM jandor: hi
06:22 PM solol: hm
06:23 PM anniepoo: hey jandor
06:23 PM jandor: hey there!
06:24 PM Tom_L: they've got one that mounts to a composite wing etc that needs repair and map the cutout for the repair patch very accurately
06:24 PM Tom_L: so they can apply an exact patch to the repair
06:26 PM jandor: anniepoo, how you game is going on? is it finished?
06:27 PM anniepoo: yes
06:27 PM anniepoo: http://partyserver.rocks:5050/
06:28 PM Tom_L: game of war?
06:28 PM Tom_L: don't play....
06:28 PM anniepoo: We did OK - figure we placed about in the middle
06:28 PM anniepoo: no, I was on a Ludum Dare team this weekend
06:28 PM anniepoo: =8cO
06:28 PM Tom_L: i remember you mentioned that now
06:29 PM Tom_L: i'm not a gamer
06:33 PM solol: they have snakelike arms like in the matrix for small robots anywhere for cheap?
06:33 PM solol: stuff you can program a signal to would be fantastic
06:50 PM jandor: anniepoo I'm asking about the game because I have something in mind
06:51 PM jandor: a long standing desdoc to be implemented properly
06:51 PM anniepoo: yes?
06:51 PM jandor: I have a "reference implementation" in python
06:51 PM anniepoo: of what?
06:51 PM jandor: a command-line turn-based strategy )
06:52 PM jandor: I'll give you the link, may be you'll like it
06:52 PM anniepoo: LOL
06:52 PM anniepoo: back in the early 80's I wrote a game on punch cards
06:52 PM jandor: https://github.com/robotota/planetbase
06:53 PM anniepoo: and almost all games were command line turn based strategy
06:53 PM anniepoo: lol
06:53 PM anniepoo: aaaaargh!
06:54 PM jandor: there is a game on steam with similar name already
06:54 PM jandor: not sure if the concept is same though
06:54 PM anniepoo: =8cO
06:54 PM deshipu: funny how the term "computer game" drifts over the years
06:54 PM deshipu: today they are all first-person shooters
06:55 PM jandor: not really
06:55 PM anniepoo: uh, of the 2900+ entries in LD38 I saw only one FPS
06:55 PM anniepoo: ours isn't
06:56 PM deshipu: Ludum Dare is hardly mainstream
06:56 PM anniepoo: there were 2900+ entries
06:56 PM anniepoo: 8cD
06:56 PM anniepoo: team I was on, all but one member had professional game dev experience
06:57 PM deshipu: if you look at a "teenager killed his parents because of playing computer games" article in a newspaper, you will have a screenshot of an FPS next to it
06:57 PM anniepoo: and that was a young artist hoping to get into the biz
06:57 PM deshipu: that's the public perception
06:57 PM anniepoo: ok, so reporters are idiots. Breaking news
06:57 PM deshipu: that and the braindead casuals on tablets and iphones
06:57 PM jandor: just imagine if it was a tetris instead of a fps screenshot
06:58 PM deshipu: or a startegy game
06:58 PM deshipu: one with hexes, for extra visual points
06:58 PM jandor: a teenager killed himself by jumping vertically into a pile of strange-shaped containers
06:58 PM deshipu: and his body disappeared together with some of them
06:59 PM jandor: witnesses say that, yep
07:00 PM deshipu: anniepoo: my point is not that journalists are idiots, but that by asking an idiot you can get an insight in the general public perceptions
07:00 PM anniepoo: yup
07:00 PM anniepoo: well aware of public perceptions
07:00 PM jandor: anniepoo if you intend to dig the code or play the game, you'll need some explanations
07:00 PM anniepoo: =8cO
07:00 PM jandor: because there is no docs in english
07:00 PM * anniepoo runs screaming from room
07:00 PM jandor: I'm talking about the planetbase
07:00 PM deshipu: just like "robots" used to be mechanical servants, then became terminators
07:01 PM jandor: they what?
07:01 PM jandor: they already became?
07:01 PM deshipu: in public perception, yes
07:01 PM deshipu: you know, when you ask a kid to draw a robot
07:02 PM anniepoo: if you ask Kevin's kids to draw robots, they'll draw delta robots
07:02 PM anniepoo: 8cD
07:03 PM deshipu: as I said, you need an idiot kid
07:03 PM anniepoo: and yes, well aware of games' reputation - even made fun of it once. I was doing a talk on game AI to an AI group
07:03 PM anniepoo: included this
07:03 PM anniepoo: Warning:
07:03 PM anniepoo: Presentation contains gratuitous graphic violence, explicit language, depictions of prostitution, smoking, torture, Nazi symbols, Nazis, sexism, racial stereotypes, alcoholism, historical inaccuracies, explosions, gunfire, models, reductionism, weak AI, littering, and really bad accents.
07:03 PM jandor: "Enjoy"
07:04 PM jandor: you just had to add it
07:06 PM jandor: :\
07:11 PM anniepoo: lol
08:45 PM anniepoo: rather than put a second coat on the outside of the snail
08:45 PM anniepoo: (the first coat's been a nightmare)
08:45 PM anniepoo: I'll wait to take it off (which will make it flexible)
08:46 PM anniepoo: and put the second layer on the inside (where bubbles don't matter)
08:46 PM anniepoo: I might laser some supports as well, and fiberglass those in place
08:47 PM zhanx: anniepoo: you can do it
08:48 PM anniepoo: well, it's been a couple miserable days of putting small pieces of fiberglass on the stupid thing, so I'm not looking forward to doing it again
08:48 PM zhanx: if i can you can
08:48 PM anniepoo: If I didnt' care about surface, I could do it pretty quick
08:48 PM anniepoo: maybe I need different technique
08:49 PM anniepoo: I waxed the plug
08:49 PM zhanx: yea outside mold
08:49 PM anniepoo: ah - if you have a mold, after the first layer you don't care if it's 'neat'
08:50 PM zhanx: yep
08:50 PM anniepoo: ok, so hmm....
08:50 PM zhanx: that was my plan
08:50 PM anniepoo: well, just as good as mold, then, is what I'm planning above
08:50 PM zhanx: also i got a 4x4 rc thing today for it
08:51 PM zhanx: 4 wheel motors
08:51 PM anniepoo: pull the shell off and slap more mat on the insided
08:51 PM anniepoo: Hmm...
08:51 PM anniepoo: you know, in retrospect making a vacuum forming table would have been less hassle
08:51 PM zhanx: then some filler if needed
08:52 PM anniepoo: filler where?
08:53 PM zhanx: on the rough areas
08:53 PM anniepoo: ah
08:53 PM anniepoo: yes, that's good
08:53 PM anniepoo: hmm...
08:54 PM anniepoo: ok, I'm going to pull this layer when it's done (one more batch, a small one, to finish)
08:54 PM solol: what's a vacuum forming table
08:54 PM anniepoo: it's a table with small holes in it.
08:54 PM anniepoo: you put a form on it.
08:55 PM solol: like a mold?
08:55 PM anniepoo: A positive
08:55 PM solol: what's a positive
08:55 PM anniepoo: if you're making an RC car body (commonly vacumm formed)
08:55 PM zhanx: anniepoo: when i make gary i will show you
08:55 PM anniepoo: you start with a 'car', not a 'car shaped hole'
08:55 PM anniepoo: Nice!
08:56 PM zhanx: food time
08:56 PM anniepoo: you have a frame that holds a sheet of plastic all around the edge
08:56 PM anniepoo: and a heater that evenly heats the plastic til it's soft
08:56 PM anniepoo: wait til plastic is soft, pull down over the positive
08:57 PM anniepoo: turn on the vacuum, it pulls down around the positive
08:57 PM anniepoo: when it cools, you have a car shaped plastic shell
08:57 PM solol: so it's a plastics thing
08:57 PM anniepoo: it's a way to form sheet plastic
08:59 PM solol: futurism: MIT Can 3D Print a Building in Hours https://goo.gl/xyo2GA
09:00 PM anniepoo: anyway, I'm headed home
09:00 PM anniepoo: tty later
09:00 PM solol: cya
11:48 PM jandor: :(