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| 01:20.00 | *** join/#brlcad infobot (ibot@rikers.org) | |
| 01:20.00 | *** topic/#brlcad is GSoC students: if you have a question, ask and wait for an answer ... responses may take minutes or hours. Ask and WAIT. ;) | |
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| 01:58.05 | brlcad | annzabelle: csg -> step conversion? I don't see that in the ideas list -- is this an idea of yours? |
| 01:58.27 | brlcad | I wasn't aware that freecad did much with csg |
| 02:40.53 | *** join/#brlcad Alvis (~Alvis@2620:101:f000:702:80e6:2ce2:cd65:fdbf) | |
| 02:48.47 | brlcad | Hi Alvis, don't be shy ;) |
| 02:49.08 | brlcad | thanks for the intro and thrilled to hear about your background and interests |
| 02:49.26 | brlcad | Alvis: were you the one that e-mailed me a while back |
| 02:49.46 | Alvis | Yes |
| 02:50.08 | Alvis | I've checked out brl-cad a couple of times and couldn't find you, so I've decided that email might be a better means of communication |
| 02:50.40 | Alvis | and now I've finally got a irc desktop client so it makes things much easier now :) |
| 02:51.06 | brlcad | getting in touch can be ad hoc -- just reach out any and every way possible |
| 02:51.10 | brlcad | you'll get someone's attention ;) |
| 02:51.39 | brlcad | irc usually works best, but you got to stay connected or use something like 'irssi' with 'screen' |
| 02:51.58 | Alvis | haha sure :) I've emailed brlcad-devel if that's what you're talking about |
| 02:52.03 | Alvis | Oh I'll check them out |
| 02:52.08 | brlcad | that works |
| 02:52.13 | brlcad | screen is a persistent terminal |
| 02:52.27 | brlcad | irssi is simply a console irc client (which you can run in a screen session) |
| 02:52.45 | Alvis | like for 'screen' it never disconnects and keeps fetching messages? |
| 02:52.46 | brlcad | which basically gives you irc 24/7 that you can get to anywhere if you run it on a server |
| 02:52.52 | brlcad | right |
| 02:52.55 | Alvis | ohhhhh nice |
| 02:53.10 | Alvis | That's exactly what I've been looking for years lol |
| 02:53.30 | Alvis | but didn't spend much time in research cause I only use irc for open source communications :p |
| 02:53.54 | brlcad | yeah, open source tends to dominate irc these days ... open source and a few games |
| 02:54.23 | brlcad | so have you done any opencl coding before? |
| 02:54.34 | Alvis | Anyway regarding the OpenCL project, I have experience in CUDA and my research project is on numerical analysis, solving equations for graphics |
| 02:54.41 | Alvis | not opencl but cuda |
| 02:54.48 | Alvis | but I'm a quick learner >< |
| 02:55.01 | Alvis | and I love learning :) |
| 02:57.09 | brlcad | what kind of cuda work have you done? |
| 02:57.39 | brlcad | and what do you mean by solving equations -- which equations? :) |
| 02:57.45 | Alvis | Navier-Stokes |
| 02:57.53 | Alvis | the pressure equation >< |
| 02:57.57 | brlcad | nods |
| 02:58.21 | brlcad | so fast fluid simulations of some sort? |
| 02:58.25 | Alvis | yea |
| 02:58.34 | Alvis | graphics simulations for water and stuff |
| 02:58.44 | Alvis | My prof has been guiding me to explore various solutions and compare their performance |
| 02:59.09 | Alvis | So far the simpler ones including Jacobi, Gauss-Seidel and Conjugate Gradient |
| 02:59.24 | Alvis | and tried out different memory options such as matrix-free, csr |
| 03:00.29 | brlcad | lots of iterative methods |
| 03:01.07 | Alvis | yup, so far we've been trying to figure out ways to adopt CUDA architecture and optimize the iterations as much as possible |
| 03:01.13 | brlcad | so cool .. ever done anything with ... nurbs? :) |
| 03:01.35 | brlcad | (specifically solving nurbs equations) |
| 03:02.33 | Alvis | nah... :/ I'm new to graphics, fortunately and thankfully my prof trusts me to be self-motivated enough to learn all the necessary prerequisites |
| 03:02.49 | brlcad | no worries, that's what I would expect ;) |
| 03:03.23 | Alvis | ahh I see from wiki "NURBS are commonly used in computer-aided design (CAD), manufacturing (CAM), and engineering (CAE)" |
| 03:03.30 | Alvis | nice, I feel relieved~ |
| 03:04.21 | brlcad | if you want some "light" reading .. https://pdfs.semanticscholar.org/958e/9bc11f07badda0258c9fc9081704d3185da5.pdf |
| 03:05.00 | brlcad | and http://www.me.berkeley.edu/~mcmains/pubs/CAD09KrishKhardMcMains.pdf |
| 03:05.41 | brlcad | so what are you interested in? |
| 03:06.15 | Alvis | actually... just curious... what level university are GSoC projects intended for, I saw OpenCV has a project that says "don't even think about doing this project unless you're a phd who has an expertise on this area" |
| 03:06.20 | brlcad | you mentioned the gpgpu opencl ray tracing, any particular aspect -- what do you know about ray tracing? |
| 03:06.40 | brlcad | project requirements span the gamut |
| 03:07.10 | brlcad | we have some projects that are more appropriate for a PhD and others that are good for students with just a year or so experience |
| 03:07.23 | Alvis | ahh ic |
| 03:08.08 | Alvis | I've only had some introduction into ray tracing and graphics simulation, I encountered the term when I'm trying to learn about animation graphics |
| 03:08.59 | Alvis | I've been exploring around various areas that spread across the spectrum, cause... rarely could I find opportunities to have some amount of guidance to help me learn more efficiently and effectively |
| 03:09.21 | Alvis | Usually if I read tutorials on my own it takes a much longer time, and things are much easier to get stuck >< |
| 03:09.41 | brlcad | so I would recommend you do three things to figure out what to do next |
| 03:10.24 | brlcad | 1) compile and install brl-cad from source, learn enough to model a sphere and ray trace it using BRL-CAD tools |
| 03:11.21 | brlcad | 2) look at the 2015 GSoC GPU work, maybe even try to compile and run it (it's in an svn branch), read through the dev log and understand the gist of what he did |
| 03:11.53 | brlcad | 3) look at the 2016 GSoC GPU work, understand how it relates to the 2015 work and how far he got ... what worked and didn't |
| 03:12.25 | brlcad | that should all be doable in just a few hours |
| 03:12.27 | Alvis | Sure, thank you! |
| 03:13.07 | brlcad | and it will give you a really strong practical understanding of where things are, what we're trying to do, and how we're going about it |
| 03:13.55 | Alvis | yuppp |
| 03:14.13 | brlcad | then you'll be in a good position to propose what you might want to do |
| 03:14.55 | brlcad | whatever you propose, it should fit into our bigger picture in some manner, either being a continuation of prior work or tacking a piece not yet tackled |
| 03:16.52 | brlcad | the 2015 effort attempted to hit the whole pipeline and got 80% there -- it got some really basic spatial partitioning (how you march a ray through a scene) and opencl-accelerated intersection testing for a half dozen object types (how you determine whether/where you hit something) |
| 03:17.28 | Alvis | wow, this is really interesting |
| 03:18.54 | brlcad | the 2016 effort tackled part of that 20% missing, boolean evaluation (weaving segments to evaluate CSG logic for final processing before hit points are turned into an image) |
| 03:19.23 | brlcad | neither effort finished, but HUGE progress has been made |
| 03:35.47 | Stragus | looks forward to giving tips and feedback on writing high performance GPU code |
| 03:39.23 | Alvis | :DDDDD |
| 03:41.21 | Alvis | I feel so hyped with all the experts in this channel :DDD |
| 04:16.02 | brlcad | Alvis: so I think the next step are those three things mentioned and see what you think |
| 04:16.48 | brlcad | you're probably going to have a lot of new concepts getting thrown at you, so just take your time and absorb what you can, ask questions if needed (and wait here for the response) |
| 04:16.52 | brlcad | someone is always here |
| 04:17.13 | brlcad | answers may come minutes/hours/days later (usually not days though) |
| 04:17.23 | brlcad | seconds even |
| 04:18.05 | brlcad | once you have a feel for what's what, next would be to try making a modification like what vasco suggested on the mailing list (converting a primitive to opencl, for example) |
| 04:18.52 | brlcad | that will then be a whole other challenge, learning to navigate a huge existing codebase with thousands of features, cobwebs and gemstones at every turn |
| 04:19.07 | *** join/#brlcad Alvis_ (~Alvis@2620:101:f000:702:9944:b485:3b3f:fbef) | |
| 04:19.51 | Alvis_ | Great ahnks |
| 04:20.04 | brlcad | Alvis_: did you see all the previous messages? |
| 04:20.17 | Alvis_ | yup |
| 04:20.19 | Alvis_ | I'm on desktop client |
| 04:20.26 | Alvis_ | why did my name change :/ |
| 04:20.27 | brlcad | okay, great |
| 04:20.38 | brlcad | you're connected twice now |
| 04:21.08 | Alvis_ | err |
| 04:22.50 | brlcad | that implies you might have missed some messages -- what was the last message you saw before "ahnks"? |
| 04:23.42 | Alvis_ | once you have a feel for what's what, next would be to try making a modification like what vasco suggested on the mailing list (converting a primitive to opencl, for example) |
| 04:24.03 | brlcad | ah, so just missed one |
| 04:24.03 | brlcad | 23:18 < brlcad> that will then be a whole other challenge, learning to navigate a huge existing |
| 04:24.06 | brlcad | <PROTECTED> |
| 04:24.16 | Alvis_ | aha |
| 04:24.17 | Alvis_ | ic |
| 04:24.24 | Alvis_ | I mean... thanks :) of course |
| 04:29.01 | LoH | ugh, making working OSX packages is pain |
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| 05:10.50 | brlcad | LoH: too many manual steps |
| 05:11.16 | LoH | brlcad: we have it scripted now |
| 05:12.01 | LoH | (finally) |
| 05:12.31 | LoH | Sound did the final work on it. |
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| 05:43.17 | xfactor | Hi all! I'm a prospective GSoC student with BRL-CAD. I'm not on irc often so I was wondering if there is any other way I can keep up-to-date with discussions on this forum? I subscribed to the mailing list and but haven't received any mail since |
| 05:45.46 | brlcad | xfactor: which mailing list did you subscribe to? |
| 05:46.20 | brlcad | logged IRC (on 24/7) and joining the brlcad-devel mailing list is generally what I would recommend |
| 05:47.06 | brlcad | i.e., not using the lame web interface to IRC but installing a proper IRC client so you can keep it running |
| 06:04.40 | Alvis_ | xfactor I installed HexChat to tackle to issue |
| 06:04.47 | Alvis_ | I've been using web irc too, it was really painful |
| 06:04.52 | Alvis_ | installing a desktop client is so worth it |
| 06:04.54 | Alvis_ | it's free |
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| 07:40.30 | xfactor | @Alvis_ does HexChat keep track of threads even when you are offline? |
| 07:40.42 | Alvis_ | not sure, but don't think so |
| 07:41.23 | Alvis_ | xfactor quoting brlcad "use something like 'irssi' with 'screen'" |
| 07:41.39 | xfactor | Okay! I'll try it |
| 07:44.23 | xfactor | @brlcad I used this link to subscribe: https://lists.sourceforge.net/lists/listinfo/brlcad-devel |
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| 14:15.18 | adit | <PROTECTED> |
| 14:15.26 | adit | I am bent on doing GSoC for this org. As for my vr proficiency is considered, I know quite a bit in that area, so any assistance would be helpful. |
| 14:15.32 | adit | I also won the google powered hackathon two to three days ago where I made a virtual city. |
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| 17:28.21 | Alvis | Hi |
| 17:28.32 | Alvis | When I try to run make |
| 17:28.32 | Alvis | <PROTECTED> |
| 17:28.39 | Alvis | Which makefile should I point to |
| 18:08.02 | Notify | 03BRL-CAD:brlcad * 69519 brlcad/trunk/README: - |
| 18:08.16 | Notify | 03BRL-CAD:brlcad * 69519 brlcad/trunk/README: - |
| 18:24.31 | Notify | 03BRL-CAD:brlcad * 69520 brlcad/trunk/src/libged/help/help.cpp: if dir is ever null, help_files() won't init files and it'll be accessed uninitialized. |
| 18:24.41 | Notify | 03BRL-CAD:brlcad * 69520 brlcad/trunk/src/libged/help/help.cpp: if dir is ever null, help_files() won't init files and it'll be accessed uninitialized. |
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| 22:32.09 | starseeker | ``Erik: does Notify need updating, or is it sf that is causing the double messaging? |
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| 23:21.59 | Notify | 03BRL-CAD:brlcad * 69522 brlcad/trunk/BUGS: recursive submodel no happy. need stack-based traversal. |
| 23:22.13 | Notify | 03BRL-CAD:brlcad * 69522 brlcad/trunk/BUGS: recursive submodel no happy. need stack-based traversal. |
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