| 00:32.07 | Notify | 03BRL-CAD:starseeker * 64227 brlcad/trunk/src/libbrep/shape_recognition_cylinder.cpp: notes about finding axis intersections. |
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| 17:17.04 | brlcad | nmz787_i: get your question answered? keep is for across databases, cp is within a database |
| 17:17.46 | nmz787_i | hey |
| 17:17.52 | nmz787_i | i think keep was what I wanted |
| 17:18.34 | nmz787_i | mroeso though, I've been looking at the convolute gear example I think you posted on which used an rpc... was trying to determine if a parabola is actually the same as the involute equations when rotated |
| 17:18.52 | brlcad | nmz787_i: bot is a triangle mesh, nmg is a polygonal mesh, dsp is a height field (e.g., terrain) |
| 17:19.10 | nmz787_i | and also, how to use an rpc section in a curve, like a toroid (i need to model fluidic channels which get etched away, and often leave a parabolic profile) |
| 17:19.30 | brlcad | ars is a waterline solid (which is presently faceted so it looks like a bot) |
| 17:20.39 | brlcad | nmz787_i: I don't think rpc is an exact fit, but I haven't done the math |
| 17:20.56 | brlcad | rather, it could be parabolic, but not necessarily |
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| 17:23.40 | nmz787_i | does dsp the same as bot or nmg, except one side is flat (the side opposite the 'terrain')? |
| 17:23.56 | nmz787_i | I like the input format of dsp, the bitmaps are easy to understand |
| 17:24.11 | brlcad | ``Erik: you noticed anything odd about .bz performance? seems back to normal now after I restarted a few things, but it was incredibly sluggish (but seemingly not thrashing) |
| 17:24.40 | nmz787_i | i.e. if i had to calculate points for a parabola, then throw it through asc2dsp... and get what I assume would be a super-thin slice |
| 17:32.45 | nmz787_i | hmm, I can't find any refs online for 'waterline cad' regarding what a 'waterline' is |
| 17:35.17 | brlcad | five sides of a dsp are "flat" :) |
| 17:35.24 | nmz787_i | 'any of a set of structural lines of a ship, parallel with the surface of the water, representing the contour of the hull at various heights above the keel and drawn on shipbuilding plans.' |
| 17:40.59 | brlcad | I don't have a handy online reference for you, but a waterline object is basically that |
| 17:42.07 | brlcad | structural lines of a ship, depths in a lake/ocean/river, contours up a building, etc |
| 17:42.36 | brlcad | here's a pretty advanced example: http://studiomaven.org/images/a/ae/Contour.png |
| 17:42.42 | nmz787_i | so it's a polygon mesh? |
| 17:43.16 | nmz787_i | hmm, that looks more like a pointcloud with points grouped by 'waterline' |
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| 17:44.14 | nmz787_i | dang, what I really want is a way to just use the involute or parabola equations to create a parametric curve... so I guess that would be NURBS |
| 17:44.35 | nmz787_i | so I won't have to compute more points to feed into a bot or dsp or whatever |
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| 17:57.28 | brlcad | yeah, bot and dsp (and ars's implementation) are all sampled solutions |
| 17:57.44 | brlcad | if you want parametric, you're looking at other primitives, and nurbs does sound like your best bet |
| 17:58.31 | brlcad | C examples in src/proc-db/*.cpp and src/other/openNURBS/example*/ |
| 18:01.35 | nmz787_i | is there some boundary-rep stuff I could use to say, feed a bunch of parabola line points, and get a NURBS primitive out? |
| 18:01.42 | nmz787_i | I see lots of commit messages in here about brep! |
| 18:01.43 | nmz787_i | :) |
| 18:03.08 | nmz787_i | .tell nmz787 does this message bot exist in here? |
| 18:04.39 | *** join/#brlcad amalia (~amalia@41.205.22.62) |
| 18:04.52 | nmz787_i | brb, won't be able to see messages until I get back (and the web log has a delay of about a day it seems) |
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| 18:11.25 | amalia | Hello |
| 18:11.38 | amalia | Who's the admin of this organisation ? |
| 18:14.29 | amalia | Why's everybody quiet? is it because I'm a girl ? |
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| 18:24.08 | sofat | amalia, no all is here |
| 18:24.53 | amalia | thinks it's too quiet here |
| 18:25.37 | Ch3ck | a |
| 18:28.20 | ``Erik | brlcad: I was just doing a port update that rebuild two openjdk's, those default to -j8... might explain todays slowdown? I've noticed other times when the machine has low load but is still very slow to respond, I'm assuming it's a memory constraint issue... |
| 18:30.23 | ``Erik | tries to murder the machine with some memory subsystem butchery |
| 18:31.22 | ``Erik | nice, swapoff: /dev/ad4s1b: Cannot allocate memory |
| 18:33.57 | Ch3ck | amalia: relax Big Sean is not around perhaps ;) Welcome btw! |
| 18:38.00 | ``Erik | amalia: I'd hope gender is irrelevant. Ask the actual question you want to ask, then wait and someone with the answer will eventually speak up |
| 18:38.04 | ``Erik | !notify ask |
| 18:38.05 | Notify | 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. |
| 18:39.03 | amalia | Thanks ``Erik |
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| 18:42.49 | amalia | !notify gsoc |
| 18:44.27 | ``Erik | what information are you looking for? (and did you look at http://brlcad.org/wiki/ ?) |
| 18:45.13 | amalia | Nope. not yet |
| 18:47.40 | sofat | amalia, what you want to ask? |
| 18:50.05 | amalia | I'll like to take part in Google Summer of Code. What should I do ? |
| 18:51.28 | sofat | find the organization and the start the work |
| 18:52.17 | ``Erik | read the wiki pages on gsoc, make sure you can check out, compile, install and run the software, take a look at the various 'idea' pages and bugs... and hang out here and the mailing list to get a feel for the community |
| 18:52.26 | sofat | solve the bugs and then submit the solution as a patches |
| 18:53.46 | ``Erik | http://brlcad.org/wiki/GSoC will probably be updated once we get acceptance confirmed (and someone who knows we're in gets around to updating it), but the checklist and other info there is still good |
| 18:56.08 | amalia | Okay. Thanks ``Erik |
| 18:56.15 | amalia | You're quite kind |
| 19:04.42 | Izak | amalia make sure you discuss the idea you like on this channel or on the mailing list |
| 19:05.45 | Izak | What skills do you have btw amalia ? |
| 19:06.10 | amalia | You mean the languages that I code in ? |
| 19:07.16 | Izak | Yes. Which programming languages do you code in ? |
| 19:08.20 | amalia | Ok. I code in C and C++. |
| 19:09.10 | amalia | Can this help me program during GSoC in BRL-CAD ? |
| 19:09.37 | nmz787_i | I think most of the code is C-style |
| 19:10.22 | Izak | Yes. Of course. The BRL-CAD project is primarily developed in C and C++. Just follow the recommendations that ``Erik gave and jump right in :) |
| 19:10.55 | ``Erik | a lot is ANSI C, c++ is creeping in due to third party libraries (openstep, opennurbs, etc), and a lot of ui and scripting stuff is tcl/tk |
| 19:12.20 | Notify | 03BRL-CAD:carlmoore * 64228 (brlcad/trunk/src/libbrep/shape_recognition_cylinder.cpp brlcad/trunk/src/tclscripts/swidgets/scripts/tkgetdir.itk): fix spellings |
| 19:12.52 | amalia | Thanks ``Erik |
| 19:13.00 | amalia | Thanks Izak |
| 19:14.16 | brlcad | ``Erik: huh, maybe .. I didn't see any cc's pop to the top of top |
| 19:15.05 | ``Erik | jdk's are half cc and half javac, often short lived |
| 19:15.44 | ``Erik | the amount of swap consumed is ... interesting. bsd is aggressive about pushing unused pages to swap, but 2g is a bit much |
| 19:16.04 | brlcad | i noticed that |
| 19:16.39 | brlcad | also noticed it had 2GB free and had pushed out 2GB.. |
| 19:17.09 | brlcad | I wtf'd |
| 19:17.27 | brlcad | any plans on upgrading to 10? :) |
| 19:17.44 | ``Erik | heh, it was full of cache pages and had 2g swap, I ran a program to force cache and buffer expirations which freed up 2 gigs, but wasn't able to swapoff it |
| 19:17.51 | brlcad | let me know if you do .. I need to run a full backup and a reboot might be in order |
| 19:18.26 | ``Erik | um, 10 is find by me, but the installworld/mergemaster/reboot phase will clobber service for a little bit... |
| 19:19.34 | ``Erik | is running a fever, so doesn't want to do anything that... "exciting" right now. :) |
| 19:19.42 | brlcad | oof, sorry to hear that |
| 19:19.57 | ``Erik | thnx |
| 19:19.59 | brlcad | that's what a little exertion will do eh? |
| 19:20.06 | brlcad | shoveling? or kids? :) |
| 19:22.07 | ``Erik | heh, I made her shovel! :D I think I had it before the snow day family fun time project yesterday, but it hit me harder today (99.6, not doctor worthy, but not 100%) |
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| 19:22.43 | nmz787_i | ah, snow... i miss it sometimes |
| 19:26.30 | ``Erik | feel free to swing by and take some of mine ;) |
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| 19:30.10 | nmz787_i | would be funny to see snow on amazon prime! |
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| 20:35.36 | Notify | 03BRL-CAD:n_reed * 64229 brlcad/branches/brep-debug/src/libbrep/intersect.cpp: Replace ON_ZERO_TOLERANCE with the more appropriate isect_tol to avoid missing good curve-surface intersections. |
| 21:10.43 | ``Erik | (wee, 100.4! high score!) |
| 21:32.21 | brlcad | you can do better than that |
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| 23:01.18 | Notify | 03BRL-CAD:starseeker * 64230 brlcad/trunk/src/libbrep/shape_recognition_cylinder.cpp: Don't rush to handle more complexity than you need to - get simpler cases working. Handle the simpler capping scenario and deal with the more complex case (if needed) later. |
| 23:29.04 | Notify | 03BRL-CAD:starseeker * 64231 brlcad/trunk/src/libbrep/shape_recognition_cylinder.cpp: one and two end cap cases need to be considered. |
| 23:36.34 | starseeker | nmz787_i: we don't have any user-level tools for creating/manipulating NURBS BRep objects, except for rotate/translate/scale and making them out of CSG primitives |
| 23:37.34 | starseeker | basically have to make your own C program (like the previously mentioned proc-db examples) to create any from scratch |
| 23:38.05 | starseeker | most of the NURBS brep stuff you see flying by is related to other efforts (conversion, raytracing, etc.) |
| 23:51.20 | nmz787_i | hmm |
| 23:51.40 | nmz787_i | I'm OK with writing C. |
| 23:51.54 | nmz787_i | but will I actually have to create the control points and such? |
| 23:52.38 | nmz787_i | I actually /have/ created a NURBS parabolic surface before, but for equation-based input, I would ideally push that to some other magic :) |
| 23:53.07 | nmz787_i | ( I am hoping that magic exists in one of the 'to-NURBS' converters) |
| 23:54.53 | nmz787_i | checking src/proc-db now |
| 23:57.18 | Notify | 03BRL-CAD:starseeker * 64232 brlcad/trunk/src/libbrep/shape_recognition_cylinder.cpp: Assemble edges associated with each cap - this may be unnecessary - intersecting the planes with the cylinder axis may tell us what we need here - but checkpoint before removing. |
