#robotics Logs
Apr 11 2017
#robotics Calendar
12:16 AM anniepoo: somebody on ##prolog says radio shack's going out of biz, might be some bargains to be had
12:29 AM rue_house: dude...
12:29 AM rue_house: (you know what I mean, whatever)
12:30 AM rue_house: but like...
12:30 AM rue_house: if you have one thats not, its cause they havn't been told
12:30 AM rue_house: it happened, like, 2 years ago now
12:33 AM anniepoo: oh!
12:33 AM anniepoo: well, the "local" one is in walla walla
12:33 AM anniepoo: they were still going strong last time I was there, which was before the snow, so 2 months
12:34 AM anniepoo: 8cD
12:37 AM rue_house: I would like to say I have an answer, maybe not one you will like, but an answer
12:38 AM rue_house: to the question, "what happens when you go to sleep in a dream"
12:38 AM rue_house: I was all set up for a good nights sleep
12:38 AM rue_house: I fell asleep and woke up, 8 hours had passed instantly, no effect of rest
12:38 AM rue_house: everything around me had passed the time, but I was awake again
12:39 AM rue_house: :(
12:46 AM Snert: d r i n k .
12:46 AM Snert: you can lose days that way.
12:53 AM rue_house: that was in a dream
12:54 AM rue_house: you cant get sleep in a dream
12:54 AM rue_house: unless I just didn't remmeber my dream in my dream
12:58 AM Snert: do you dream in color?
12:59 AM mrdata_: always
12:59 AM mrdata_: i dreamt i fell asleep
12:59 AM mrdata_: but then i woke up
12:59 AM Snert: I don't remember the colors, just the events.
01:00 AM mrdata_: are we still in the game?
01:00 AM Snert: I don't remeber B&W either.
01:12 AM rue_bed: well I fell asleep and woke up in the dream
01:12 AM rue_bed: I was annoyed, I setup myself infront of a fireplace with the tv and everything
01:13 AM rue_bed: I spent a long time clearing things away from the fireplace and setting up the autodamper properly
01:14 AM rue_bed: I was living in a cabin in the woods with a buddy
01:14 AM rue_bed: I had to go to work in the morning, I was quite looking forwards to a good nights sleep
01:15 AM rue_bed: heh, tv, my age is showing
01:15 AM rue_bed: WHATS TV?
01:36 AM rue_bed: I think I installed my main machine in '99
01:36 AM rue_bed: one OS install in 18 years..
01:37 AM rue_bed: if it hadn't been for power outages and hardware upgrades, I might not have had any reboots either
01:37 AM rue_bed: uptime
01:37 AM rue_bed: 23:08:22 up 65 days, 12:08, 20 users, load average: 0.89, 0.86, 0.77
01:38 AM rue_bed: 65 days ago since my video card locked up the console and I had to reboot
01:38 AM rue_bed: :(
02:45 AM jandor_: hi
02:45 AM rue_bed: low
02:47 AM jandor_: ?
02:49 AM jandor_: what was that?
05:20 AM pokmo: i'm trying to mount a metal wheel on a 2mm shaft. for fastening, is a set screw pretty much my only option?
06:59 AM deshipu: you could weld it too
06:59 AM deshipu: or glue it
07:04 AM veverak: well
07:05 AM veverak: graph generates moves \o/
07:06 AM veverak: deshipu: it's lazy with moving the tibia
07:06 AM veverak: moves only femur up/down
07:06 AM veverak: lazy robot!
07:08 AM jandor_: wut
08:04 AM SpeedEvil: You should add costs to the various moves. Remember the most important one. https://xkcd.com/534/
08:04 AM deshipu: SpeedEvil: how do you check for that, thogh?
08:05 AM SpeedEvil: :)
08:12 AM veverak: :D
08:12 AM veverak: hmm
08:12 AM veverak: it seems as binary heap in vector performs best for my Astar
08:12 AM veverak: *that
08:12 AM veverak: which fits what I googled
09:31 AM rue_house: not setting it up for parallel processing on a graphics card vector engine?
09:34 AM Poltergiest: hi all
09:34 AM jandor_: hi
09:35 AM jandor_: how goes it?
09:35 AM rue_house: we dont know yet
09:35 AM Poltergiest: all good
09:35 AM Poltergiest: n u ?
09:38 AM -!- #robotics mode set to +o by ChanServ
09:39 AM rue_house changed topic of #robotics to: If you ask a question, you must wait for the answer. | http://tom-itx.no-ip.biz:81/~webpage/index.php | J is for Junction-transistor
09:49 AM Deacydal is now known as deacyde
09:56 AM mrdata__ is now known as mrdata
10:02 AM veverak: rue_house: beeen thinking about that
10:02 AM veverak: :)
03:17 PM veverak: finally
03:17 PM veverak: graph search at around 2ms
03:53 PM veverak: aaaaand we are at 120us
03:57 PM veverak: yeah, that seems good enough
04:04 PM jandor_: hey veverak
04:05 PM jandor_: what are you doing with graphs
04:05 PM jandor_: I'm curious
04:05 PM veverak: jandor_: node of graph - state of arm
04:05 PM veverak: jandor_: edge contains following prices: energy for change of state, time needed to change the state, clearance price (edges close to ground have this price high)
04:05 PM veverak: move the arm -> find shortest path in graph
04:06 PM jandor_: aha
04:06 PM jandor_: do you use something like Dijkstra for it?
04:06 PM jandor_: or astar
04:08 PM jandor_: a graph with vertices in what space?
04:08 PM jandor_: control?
04:09 PM veverak: astar definetly
04:09 PM veverak: is MUCH faster :)
04:09 PM veverak: jandor_: space is "JointState" space
04:09 PM veverak: for actual arm, I have 3DOF
04:10 PM jandor_: aha
04:10 PM veverak: so my state is JointState[3]
04:10 PM veverak: where JointState is uint8_t now
04:10 PM jandor_: do account for gravity effects on a arm?
04:10 PM jandor_: I mean you don't have to apply power sometimes
04:10 PM jandor_: for arm to move
04:10 PM jandor_: it
04:12 PM jandor_: i'm digging gazebo's ode fork now, so I'm happy to have a talk )
04:17 PM veverak: jandor_: sure it does
04:17 PM veverak: but I don't promote this effect in edges prices ... yet
04:17 PM veverak: :)
04:19 PM anniepoo: 8cD
04:23 PM jandor_: hi
04:24 PM veverak: jandor_: I also realized that promoting gravity in the graph does not yet makes sense for me
04:24 PM veverak: it's not like it will actually change something
04:28 PM jandor_: too much friction in the joints?
04:29 PM jandor_: or too big inertias?
04:29 PM jandor_: new story
04:29 PM jandor_: gazebo depends on ODE
04:30 PM jandor_: on their own fork of ODE
04:30 PM jandor_: which is not pushed to the upstream for quite a long time
04:30 PM anniepoo: afternoon jandor
04:30 PM jandor_: so they have some weak documented new features
04:30 PM jandor_: which apparently no one could explain
04:31 PM jandor_: I ended up writing to some Chinese girl (girl?) who had authored some of that changes
04:31 PM jandor_: and the current mantainer of ODE refuses to help me because I'm russian and he's ukrainian
04:32 PM jandor_: but he told me to fuck off in a very polite manner, so I believe he has his own reasons
04:32 PM jandor_: even directed me to the ode users group
04:33 PM anniepoo: it is possible the maintainer doesn't want to deal with some fork.
04:33 PM jandor_: good night, anniepoo )
04:33 PM anniepoo: that's generally the rule in OS - you fork it, it becomes your problem
04:34 PM jandor_: I thought he could borrow some code from there
04:34 PM jandor_: or help them sync in someway
04:35 PM jandor_: ok, there was no any confrontation, everything was polite and we just gone our ways
04:35 PM anniepoo: 8cD or it could be OS politics, or global politics, or just not being interested
04:57 PM jandor: sorry, I quit
04:58 PM jandor: I mean I wasn't there for some time
04:58 PM jandor: now I'm back
05:00 PM veverak: jandor: anyway, I don't intentd to overkill the calculation of time/energy prices
05:00 PM veverak: I want decent base prices and than update them based on feedback eventually
05:12 PM jandor: energy market
10:44 PM anniepoo: 8cD
10:50 PM Tom_itx: oh?
10:50 PM anniepoo: >8@_ done with work for evening, onto snailing
10:53 PM anniepoo: I'm going to start making the shell