| 00:03.12 | yukonbob | :( |
| 00:04.02 | yukonbob | Rusty owes me ;) |
| 00:04.34 | andrecastelo | well folks |
| 00:04.36 | andrecastelo | i'm out |
| 00:04.38 | andrecastelo | :) |
| 00:04.40 | andrecastelo | good night |
| 00:14.49 | hippieindamakin8 | hey folks |
| 00:17.03 | hippieindamakin8 | starseeker_home, that is not a problem man.. |
| 00:17.36 | hippieindamakin8 | but it ll be of no use :P modelling a babbage difference engine |
| 00:19.42 | hippieindamakin8 | we have modelled the spare parts of a car as a semester project in CAD and engineering design course |
| 00:20.28 | hippieindamakin8 | but unfortunately then i dint know about BRL-CAD |
| 00:41.58 | *** join/#brlcad hippieindamakin8 (n=hippiein@210.212.55.3) |
| 01:02.02 | *** join/#brlcad jdoliner (n=jdoliner@wireless-230-86.uchicago.edu) |
| 01:02.37 | jdoliner | brlcad? |
| 01:07.41 | brlcad | ~ask :) |
| 01:07.47 | brlcad | aww |
| 01:08.02 | pacman87 | ~ask |
| 01:08.02 | ibot | Questions in the channel should be specific, informative, complete, concise, and on-topic. Don't ask if you can ask a question first. Don't ask if a person is there, just ask what you intended to ask them. Better questions more frequently yield better answers. We are all here voluntarily or against our will. |
| 01:11.38 | brlcad | ibot you should ignore emoticons |
| 01:13.27 | jdoliner | you said you had questions for me earlier |
| 01:16.58 | brlcad | i have questions for most everyone |
| 01:17.07 | brlcad | shifts context |
| 01:17.14 | brlcad | scratches head |
| 01:17.32 | brlcad | oh yeah, why'd you disappear?? :) |
| 01:17.55 | brlcad | not to put you on the spot or anything *ahem* |
| 01:18.17 | jdoliner | sorry your lunch, I had to go grab some lunch myself |
| 01:18.44 | jdoliner | your lunch ran into mine unfortunately |
| 01:19.02 | jdoliner | but I've returned |
| 01:23.40 | jdoliner | While you think, do you perhaps know what the interval in: bool ON_Intersect(const ON_BoundingBox&, const ON_Line&, double, ON_Interval*) |
| 01:23.48 | jdoliner | is supposed to be. |
| 01:24.59 | brlcad | more than likely an upper and lower bounds so that the intersection can be computed -- numerics can go to all hell for completely unbound search spaces when you're root finding |
| 01:26.08 | jdoliner | okay that makes good sense |
| 01:27.19 | brlcad | hm, though in the case of ON_Intersect(), the header defines it as something specific |
| 01:27.22 | brlcad | see the header |
| 01:27.25 | brlcad | it's the result |
| 01:40.27 | jdoliner | okay cool |
| 01:40.47 | jdoliner | do you have some questions regarding my project? |
| 01:49.13 | brlcad | jdoliner: heh, of course -- look forward to seeing that patch of course, how do you actually forsee being able to compute the surface intersections? |
| 01:50.24 | brlcad | also, one thing to keep in mind -- openNURBS is a 3rd party code that we do our best to not modify directly -- any changes should be in src/librt/opennurbs_ext.cpp or similar file outside of openNURBS itself so that we can keep their code up to date without continually clobbering changes |
| 01:50.41 | brlcad | so you have to either make funcs that take both parameters or extend from their classes with new classes |
| 01:54.18 | jdoliner | The computation of surface intersections comes down to manipulation of algebraic curves. |
| 01:54.52 | jdoliner | However as the papers suggest this is pretty computationally intensive |
| 01:55.19 | jdoliner | Solutions either have impractical runtimes for our situation or they can become a bit inaccurate. |
| 01:56.44 | jdoliner | So it might not be possible to implement exactly the solution we want, however I'm confident I can make one that is of some use, and will make integration of new algorithms much easier |
| 01:57.46 | jdoliner | actually from what I've seen the opennurbs classes are pretty good for the task at hand. |
| 01:58.30 | brlcad | boole tends to work like 95% of time time.. but that's a pretty huge error marging when it comes to cad models |
| 01:58.42 | brlcad | that means just about any given cad model will at least partially fail |
| 01:59.06 | brlcad | opennurbs is a pretty solid foundation, that's why it's the basis for our brep code |
| 01:59.27 | brlcad | you can see an example cube constructed via opennurbs in src/proc-db/breplicator.cpp |
| 01:59.54 | brlcad | there's also a couple other twisted cube examples, but breplicator was written to be relatively straight-forward to understand brep structure |
| 01:59.55 | jdoliner | does that mean on 95% of CSG trees or on 95% of the nodes |
| 02:00.39 | brlcad | it's a swag number, it's high enough that it's gonna happen -- mostly though, i think it actually fails for code robustness reasons, not actual algorithmic |
| 02:01.14 | jdoliner | explain more what you mean by robustness reasons |
| 02:01.14 | brlcad | just by the nature that esolid worked with fixed point math indicates to me that it can work with boole's approach with proper tolerance management |
| 02:02.27 | jdoliner | yes, but I think we might find that BOOLE + proper tolerance management = ESOLID |
| 02:02.30 | brlcad | e.g. taking the simple case of 1+1 (deja vu!) .. where boole's approach to solving that is something along the lines of double result = 1.0 + 1.0; if (result == 2.0) then do something |
| 02:03.33 | brlcad | esolid's approach is to turn that into fixed_float result = fixed_float(1.0) + fixed_float(1.0); if (equals(result, 2.0, 5_decimal_places)) then do something |
| 02:03.59 | brlcad | er, where + is really add_these_together(fixedA, fixedB) |
| 02:04.25 | brlcad | esolid's isn't "propoer tolerance managment", it's a cop-out |
| 02:05.28 | brlcad | proper tolerance management for the first case necessitates that you don't just check == 2.0 .. you check for distance to the value within tolernace if (NEAR_ZERO(result - 2.0, 0.00001)) then do something, for example |
| 02:05.29 | jdoliner | by that do you mean it just throws a huge amount of computation at the problem |
| 02:06.19 | brlcad | yes, it throws floating point out the window so that the mathematical equations all result in stable computations (within a given absolute fixed point precision) |
| 02:06.30 | brlcad | which is several orders of magnitude worse |
| 02:06.34 | brlcad | computationally |
| 02:07.27 | brlcad | I really think boole's _implementation_ is probably just weak (as it was really just an academic exercise, not production quality robust code) |
| 02:08.06 | jdoliner | where did you say opennurbs_ext.cpp was? |
| 02:08.52 | brlcad | hopes jdoliner doesn't really need his hand held that closely that he can't find a file by name ... :-) |
| 02:09.41 | jdoliner | don't worry I've found many files already, I'm just worried because, it seems you may have been wrong about the location of this one |
| 02:10.09 | brlcad | why would that worry you? :) |
| 02:11.02 | brlcad | there are thousands of files in brl-cad, I don't keep them all in memory -- though I was right about that one |
| 02:11.37 | brlcad | hm, 1988 files to be exact, 354 directories |
| 02:13.36 | brlcad | hope you hand around irc more often ;) off to dinner for now though |
| 02:53.35 | brlcad | aww, that wasn't very long at all |
| 03:40.12 | CIA-10 | BRL-CAD: 03starseeker * r30683 10/brlcad/trunk/src/proc-db/tire.c: Use some intermediate variable names to simplify rim creation logic a bit - seems to be working now for different sizes. |
| 03:51.13 | starseeker_home | decides sleep is next on the agenda... |
| 04:15.04 | brlcad | hum hum |
| 04:44.42 | PrezKennedy | hmmmm sleep... |
| 04:45.21 | poolio | why sleep when you can code? |
| 04:45.49 | PrezKennedy | why code when you can do anything else? |
| 04:48.11 | brlcad | ~poolio++ |
| 04:48.40 | PrezKennedy | awww :( |
| 04:50.03 | brlcad | heh |
| 05:21.46 | *** join/#brlcad pacman87 (i=127@resnet-45-192.dorm.utexas.edu) |
| 05:44.25 | poolio | sorry PrezKennedy :) |
| 07:01.49 | *** join/#brlcad clock_ (n=clock@zux221-122-143.adsl.green.ch) |
| 07:03.45 | *** join/#brlcad d_rossberg (n=rossberg@bz.bzflag.bz) |
| 09:20.49 | *** join/#brlcad clock_ (n=clock@zux221-122-143.adsl.green.ch) |
| 09:28.25 | *** join/#brlcad archivist (n=archivis@host81-149-119-172.in-addr.btopenworld.com) |
| 09:50.26 | *** join/#brlcad archivist (n=archivis@host81-149-119-172.in-addr.btopenworld.com) |
| 10:17.57 | *** join/#brlcad mafm (n=mafm@elnet-111.lip.pt) |
| 10:18.42 | mafm | morning |
| 11:10.07 | brlcad | `morning |
| 12:51.47 | mafm | brlcad: are predefined mentors assigned for different project ideas, or you don't do that in your organization? |
| 12:53.57 | brlcad | depends on the mentor, depends on the idea |
| 12:58.56 | mafm | I see |
| 13:30.03 | *** join/#brlcad hippieindamakin8 (n=hippiein@210.212.55.3) |
| 13:30.53 | hippieindamakin8 | hey guys |
| 13:30.55 | hippieindamakin8 | good morning |
| 13:31.21 | pacman87 | good morning |
| 13:33.42 | hippieindamakin8 | so how is ur patch working man ? |
| 13:33.58 | hippieindamakin8 | so pacman87 how is ur patch working man ? |
| 13:34.28 | pacman87 | i've uploaded it |
| 13:34.38 | pacman87 | but it's only half of what needs to be done |
| 13:35.33 | pacman87 | http://sourceforge.net/tracker/index.php?func=detail&aid=1939611&group_id=105292&atid=640804 |
| 13:36.04 | hippieindamakin8 | :) |
| 13:36.18 | pacman87 | how's your patch? |
| 13:36.37 | hippieindamakin8 | hey tell u wat i got a project in fluid mechanics :P micro fluids |
| 13:37.06 | hippieindamakin8 | i dont know the present state of my patch man.. havent touched BRL-CAD stuff for the past 2-3 days |
| 13:37.14 | hippieindamakin8 | my end semester exams started |
| 13:37.36 | hippieindamakin8 | tryin to study hard ;) |
| 13:38.18 | hippieindamakin8 | the final year project is on micro-fluids |
| 13:38.39 | pacman87 | cfd or analytical? |
| 13:39.03 | hippieindamakin8 | it is micro fluid analysis i would say CFD |
| 13:39.36 | pacman87 | how does a mircofluid differ from a normal fluid? |
| 13:39.46 | hippieindamakin8 | the reynolds number |
| 13:40.05 | hippieindamakin8 | and the mixing charachteristics.. |
| 13:40.54 | hippieindamakin8 | our project is to design some micro mixer and laminators using the flagellar properties of the bacteria . |
| 13:41.17 | pacman87 | so it's not the fluids that are 'mirco', it's their environment |
| 13:41.23 | hippieindamakin8 | dont know how we are gonna do that .. |
| 13:41.42 | hippieindamakin8 | no.. :) the fluids with Re ~.1 |
| 13:42.20 | pacman87 | Re = rho*v/(mu*D) ? |
| 13:42.30 | hippieindamakin8 | when u try to pass 2 fluids into a tunnel they dont mix like they do normally in the macroscopic levels |
| 13:42.46 | hippieindamakin8 | correction : rho*v*D/mu |
| 13:42.56 | pacman87 | knew it was something like that |
| 13:43.07 | pacman87 | been a few semesters ago |
| 13:43.12 | hippieindamakin8 | :)) i revised it day bfore :) |
| 13:43.16 | hippieindamakin8 | had an exam today |
| 13:43.55 | hippieindamakin8 | hey u go on.. i shall get back to studies :) |
| 13:44.25 | pacman87 | good luck |
| 14:17.45 | CIA-10 | BRL-CAD: 03brlcad * r30684 10/brlcad/trunk/sh/make_dmg.sh: include the size of the package in the dmg autosize calcs |
| 14:21.52 | CIA-10 | BRL-CAD: 03brlcad * r30685 10/brlcad/trunk/src/gtools/beset/ (beset.c beset.h): quellage |
| 14:37.26 | CIA-10 | BRL-CAD: 03brlcad * r30686 10/CVSROOT/: CVSROOT is no longer needed |
| 14:40.03 | mafm | CVSROOT spies in the SVN land? :) |
| 14:40.21 | CIA-10 | BRL-CAD: 03brlcad * r30687 10/brlcad/branches/ (VendorARL/ libpng/ scriptics/ zlib/): remove branches that have no meaning and are for 3rd-party dependencies |
| 14:40.21 | brlcad | kinda :) |
| 14:40.42 | brlcad | haven't cleaned up the svn root since the conversion, there are all sorts of conversion turds that need to be cleaned up |
| 14:49.33 | *** join/#brlcad andrecastelo (n=chatzill@189.71.19.77) |
| 14:49.57 | andrecastelo | good morning folks :D |
| 14:58.39 | brlcad | hola |
| 14:59.32 | *** join/#brlcad andrecastelo_ (n=chatzill@189.71.19.77) |
| 15:01.18 | *** join/#brlcad andrecastelo_ (n=chatzill@189.71.19.77) [NETSPLIT VICTIM] |
| 15:01.18 | *** join/#brlcad andrecastelo (n=chatzill@189.71.19.77) [NETSPLIT VICTIM] |
| 15:01.18 | *** join/#brlcad Maloeran (n=maloeran@glvortex.net) [NETSPLIT VICTIM] |
| 15:01.22 | *** join/#brlcad andrecastelo__ (n=chatzill@189.71.19.77) |
| 15:06.31 | CIA-10 | BRL-CAD: 03brlcad * r30688 10/brlcad/branches/ (13 files in 13 dirs): remove unlabeled branches with uninteresting code |
| 15:09.25 | CIA-10 | BRL-CAD: 03starseeker * r30689 10/brlcad/trunk/src/proc-db/tire.c: Add first stab at cuts for bolt holes and center. |
| 15:10.32 | CIA-10 | BRL-CAD: 03brlcad * r30690 10/brlcad/branches/ (6 files in 6 dirs): remove frozen branches that were 'completed' (or dead/closed) including the ansi, autoconf, bobWinPort, brlcad_5_1_alpha_patch, photonmap, and windows branches |
| 15:10.35 | ``Erik | *readreadread* |
| 15:15.45 | CIA-10 | BRL-CAD: 03brlcad * r30691 10/brlcad/branches/phong-branch/: the phong branch is dead, all hail phong |
| 15:20.54 | andrecastelo__ | finally.. cya later clones |
| 15:26.57 | CIA-10 | BRL-CAD: 03brlcad * r30692 10/brlcad/trunk/AUTHORS: |
| 15:26.57 | CIA-10 | BRL-CAD: found a reference to mged contributions from Gary Kuehl in a branch. it's |
| 15:26.57 | CIA-10 | BRL-CAD: unclear if these changes ever made it in or if other code was related or if it |
| 15:26.57 | CIA-10 | BRL-CAD: was even code that was provided, but credit him with special thanks for now. |
| 15:30.02 | CIA-10 | BRL-CAD: 03brlcad * r30693 10/brlcad/trunk/AUTHORS: dtrmenak is an open source contributor, bob has contributed as open source off-the-clock as well |
| 15:33.30 | *** join/#brlcad Elperion (n=Bary@p548746D4.dip.t-dialin.net) |
| 15:35.32 | CIA-10 | BRL-CAD: 03brlcad * r30694 10/brlcad/trunk/AUTHORS: butler inactive for approx 17 months now (only two isolated events intaval script and manpage update), remove activity marker |
| 15:36.55 | pacman87 | brlcad: i think it's 'dtremenak', not 'dtrmenak' (re: AUTHORS) |
| 15:37.17 | brlcad | it is, just a commit log typo |
| 15:37.33 | pacman87 | ok, just making sure the real thing was right |
| 15:37.42 | brlcad | it doesn't list their nicks |
| 15:37.45 | brlcad | lists real names |
| 15:38.25 | pacman87 | i thought so, but figured it'd be best to double check |
| 15:40.21 | CIA-10 | BRL-CAD: 03brlcad * r30695 10/brlcad/trunk/AUTHORS: shumaker has been inactive for nearly two years, remove activity marker |
| 15:42.48 | CIA-10 | BRL-CAD: 03brlcad * r30696 10/brlcad/trunk/AUTHORS: butler's away on sabattical/training/education so update POC to be davisson for ARL |
| 15:46.02 | CIA-10 | BRL-CAD: 03brlcad * r30697 10/brlcad/trunk/AUTHORS: yapp moves up from special thanks for gentoo/doc work to significant code contributions for proc-db/tire, on his way to being new dev (woot) |
| 16:37.58 | yukonbob | yay starseeker_home! |
| 16:37.59 | yukonbob | :) |
| 16:38.04 | yukonbob | waves in |
| 16:45.15 | CIA-10 | BRL-CAD: 03bob1961 * r30698 10/brlcad/trunk/src/ (librt/mirror.c mged/chgmodel.c tclscripts/mged/help.tcl): Added the mirror_pt parameter to rt_mirror. This is the point on the axis about which the mirror action will take place. |
| 17:16.24 | ``Erik | wiggles his toes |
| 17:17.39 | ``Erik | bowling alley grub, blurf |
| 17:27.49 | ``Erik | hum |
| 17:35.49 | prasad_ | ah the bowling alley |
| 17:35.57 | PrezKennedy | which bowling alley? |
| 17:36.05 | ``Erik | on post |
| 17:36.15 | ``Erik | by the px |
| 17:36.30 | PrezKennedy | Why on earth would you eat there?? |
| 17:36.39 | ``Erik | cuz kermit wanted to go somewhere fast |
| 17:36.41 | ``Erik | O.o |
| 17:37.00 | prasad_ | heh how's the ssvt crew |
| 17:37.18 | PrezKennedy | kermit is crazy! |
| 17:37.39 | prasad_ | i went to the bowling alley once |
| 17:37.44 | prasad_ | hmm never did go back |
| 17:38.04 | ``Erik | not sure, prasad, dont' get over there much.. there was a split, and their bc now lives in the same building, but supposedly not nearly as horrible as this building :) |
| 17:38.32 | prasad_ | orly |
| 17:38.51 | prasad_ | iirc it never was |
| 17:38.52 | prasad_ | ;) |
| 18:12.35 | mafm | bye |
| 18:27.45 | ``Erik | hehehehe http://www.linuxisforbitches.com |
| 18:50.22 | *** join/#brlcad andrecastelo (n=chatzill@189.71.19.77) |
| 18:50.36 | andrecastelo | good afternoon everyone |
| 18:50.40 | ``Erik | wb, andre |
| 18:50.47 | *** join/#brlcad hippieindamakin8 (n=hippiein@210.212.55.3) |
| 18:50.56 | andrecastelo | hi ``Erik |
| 18:50.59 | ``Erik | and hippi O.o |
| 18:51.03 | andrecastelo | how are you doing? |
| 18:51.08 | andrecastelo | hey hippieindamakin8 |
| 18:51.09 | hippieindamakin8 | hey ppl |
| 18:52.42 | ``Erik | huh, 21 megatons at up to 10 km/s... ow O.o |
| 18:54.29 | hippieindamakin8 | wats that ``Erik |
| 18:54.46 | ``Erik | the apophis asteroid |
| 18:55.31 | hippieindamakin8 | :) |
| 18:57.50 | andrecastelo | we're going to die ? :D |
| 18:57.59 | andrecastelo | lol, wrong emoticon |
| 18:58.01 | andrecastelo | :( |
| 18:58.09 | ``Erik | only if you stand under it, IF it hits? :D |
| 18:58.45 | prasad_ | that guy has an issue with web services |
| 18:59.20 | ``Erik | huh? |
| 19:05.15 | *** join/#brlcad homovulgaris (n=ca3fe93d@bz.bzflag.bz) |
| 19:25.00 | CIA-10 | BRL-CAD: 03bob1961 * r30699 10/brlcad/trunk/include/raytrace.h: Update signature of rt_mirror (i.e. added mirror_pt). |
| 20:14.13 | *** join/#brlcad Elperion (n=Bary@p548746D4.dip.t-dialin.net) |
| 20:17.45 | prasad_ | http://img.photobucket.com/albums/v686/peeweejd/kidpwned.gif |
| 20:47.33 | ``Erik | ehehe |
| 20:56.22 | brlcad | hah |
| 21:01.08 | *** join/#brlcad pacman87 (i=127@resnet-45-192.dorm.utexas.edu) |
| 21:55.17 | hippieindamakin8 | :)) |
| 23:08.55 | pacman87 | hippieindamakin8: test went well today? |
| 23:16.44 | brlcad | he survived, apparently ;) |
| 23:17.13 | hippieindamakin8 | ya man :) got the answer scripts too :) |
