IRC log for #brlcad on 20100627

00:21.31 PrezKennedy brlcad, i heard about the email you sent my bro. A++
00:29.20 AirBender Now I understand why the image didn move, but the raytracer draws only noise and throw a warning about the image size being greater than the reserved size for the file. How can I solve this_
00:41.46 AirBender solved
03:20.52 *** join/#brlcad luke-jr (~luke-jr@2002:62b3:1d4c:0:20e:a6ff:fec4:4e5d)
03:21.52 luke-jr hi
03:22.03 luke-jr I want to design a custom clock... would brlcad be useful for me?
03:57.35 brlcad luke-jr: that depends on a lot of factors, but "probably"
03:58.31 brlcad PrezKennedy: interesting that you'd hear about it
03:58.35 luke-jr what factors?
03:58.37 luke-jr O.o
03:58.58 brlcad a whole slew of factors
03:59.10 brlcad what you're trying to accomplish
03:59.19 brlcad the actual goals products of your design
03:59.25 brlcad what experience you have
03:59.31 brlcad familiarity with concepts
03:59.35 brlcad lots lots more
04:00.08 brlcad might as well ask "will car insurance be useful for me?" .. well, it really depends
04:00.48 luke-jr no experience
04:00.59 luke-jr just want to build a timepiece
04:01.12 luke-jr read a wiki-howto on how pendulum clocks usually work
04:17.02 luke-jr gosh, this thing has a ton of ~arch deps :(
05:41.04 PrezKennedy brlcad, he's down here for the weekend
06:36.42 Ralith brlcad: has BRL-CAD become more useful for design in the past year or so?
07:16.45 *** join/#brlcad yukonbob (~svs@S0106001125477e9c.ok.shawcable.net)
08:11.30 *** join/#brlcad PrezKennedy (~Prez@96.31.84.96)
17:39.48 *** join/#brlcad yukonbob (~svs@S0106001125477e9c.ok.shawcable.net)
18:31.18 *** join/#brlcad Stattrav (~Stattrav@117.192.143.77)
19:01.37 starseeker O.o that's weird - I stumble onto irock.com looking at mineral photos, and it turns out he donated the whole lot to wikimedia under a CC license
19:01.40 *** join/#brlcad ``Erik (Here@c-69-140-109-104.hsd1.md.comcast.net)
19:02.45 starseeker makes a note that if he wants minerals at some point irocks.com is the place to check first... donating to Wikimedia deserves reward
19:03.15 starseeker yeah, irocks.com not irock.com
19:13.56 luke-jr so I installed brlcad...
19:14.00 luke-jr how do I actually run it? :/
19:18.14 starseeker type mged
19:21.09 luke-jr bash: mged: command not found
19:22.40 luke-jr gotta give an absolute path /usr/brlcad/bin/mged
19:22.44 luke-jr but then it just gives a console
19:22.57 luke-jr and "graphics window"
19:24.10 luke-jr I get the feeling I might be better off throwing together a Perl script :/
19:25.21 luke-jr hmm
19:25.22 luke-jr how can I add units?
19:28.54 starseeker luke-jr: I'd recommend reading this first: http://brlcad.org/w/images/c/cf/Introduction_to_MGED.pdf
19:29.24 luke-jr starseeker: will I need to edit the source to add units, or is that configurable somewhere?
19:33.48 starseeker depends on what you mean by "add units"
19:34.11 starseeker if you mean change units in the .g file, by default mm is used and you can change this with the units command
19:38.13 *** join/#brlcad Nohla (~Nohla@201.255.229.17)
19:41.54 luke-jr starseeker: I mean the menu doesn't list tonal units
19:42.22 luke-jr I probably want to work in metertons
19:42.39 luke-jr which is about 0.366615 inches or 9.3120223 millimetres
19:43.28 luke-jr and represented in base 16
20:03.55 luke-jr circles and such primitives are nice for 3D modelling, but how do I make gears and emulate the physics? :/
20:10.41 *** join/#brlcad jam555 (~on_Chatzi@adsl-99-62-181-224.dsl.okcyok.sbcglobal.net)
20:10.51 *** part/#brlcad jam555 (~on_Chatzi@adsl-99-62-181-224.dsl.okcyok.sbcglobal.net)
20:14.50 starseeker luke-jr: we don't support that sort of simulation currently, afaik
20:21.07 luke-jr ...
20:21.22 luke-jr then this seems like a pointless exercise :(
20:47.21 Ralith I don't think any CAD suite supports that.
20:47.58 Ralith a few game-oriented tools might, but gears don't tend to simulate well in game physics engines.
20:48.15 Ralith you might want to rethink what exactly you need to achieve your goals
21:07.52 luke-jr emulation of gears and such, to figure out the right sizes/types
21:52.13 Ralith physical simulation is not the right way to do that.
21:52.24 Ralith just select gears specified as compatible :P
21:52.30 luke-jr ...
21:52.38 luke-jr there's more than compatibility to consider
21:52.48 luke-jr they have to functionally do what I need them to do :P
21:52.54 Ralith rotate?
21:53.03 luke-jr at the exact correct rate, yes
21:53.12 Ralith gear ratios are trivial math
21:53.25 luke-jr perhaps
21:53.42 Ralith and will give you far more precise figures than a physical simulation
21:54.04 Ralith there's no 'perhpas' to it; it's simple arithmetic.
21:54.34 Ralith http://en.wikipedia.org/wiki/Gear_ratio
21:54.35 luke-jr I've never done it before, and don't want to find out after I've spent $$$ that I was wrong on something
21:54.48 Ralith well, there's detailed information on how to do it.
21:54.49 luke-jr right now, I don't even know my input rate
21:55.30 luke-jr more importantly, I guess, is finding where I can actually buy gears...
22:06.42 *** join/#brlcad R0b0t1 (~Enigma@unaffiliated/r0b0t1)

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