IRC log for #brlcad on 20140824

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05:31.17 pujani What is meaning of VGR?
05:56.19 mihaineacsu pujani: [...The benchmark results provide a direct linear metric (called the vgr number) for comparing performance between systems.] http://www.cs.odu.edu/~salam/wsdl/inforet/cleanwiki/BRL-CAD_2b85.txt
05:59.14 mihaineacsu reference for perfomance comparison
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13:59.12 sofat hello
13:59.14 sofat is want to ask one question
13:59.14 sofat my question is what is meaning of VGR in brlcad?
13:59.14 sofat What is VGR ?
14:00.06 sofat hello anyone there?
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14:03.30 ``Erik 'vgr' was an old souped up vax11/780 running 43bsd, it was the primary machine early BRL-CAD was developed on
14:04.29 ``Erik so when the benchmark suite was designed, it was the reference machine for performance... if your machine scored 2 vgr's, it was twice as fast as the VGR.BRL.MIL machine
14:05.20 ``Erik that's it, just an arbitrary unit of performance :)
14:05.44 ``Erik a little more plactical than a flop
14:05.57 ``Erik practical, srry, being walked on by a cat
14:11.27 sofat thank you sir
14:14.19 ``Erik np (and if you really want to see how geeky it is, I think the name comes from the first star trek movie)
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17:22.49 Notify 03BRL-CAD:iiizzzaaakkk * 62395 brlcad/trunk/src/librt/primitives/tor/tor.c: Correcting spellings within a comment
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18:40.55 starseeker well, I tried yanking out the asserts and throws, and now I get a segfault in InScanArea
19:23.09 Izakey starseeker Which command is used to test that a primitive's rt_xxx_vshot() function works properly ?
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19:33.23 brlcad Izakey: awesome progress on the wireframe
19:34.27 Izakey thanks brlcad
19:34.50 brlcad nothing in brl-cad currently calls the vshot routines
19:35.12 Izakey Ahh! Curiously
19:35.35 Izakey Does that mean we need a separate command for that ?
19:37.03 brlcad the vshot routines were the start of a data-coherent ray tracing interface where multiple rays are tested against a primitive simultaneously
19:37.15 brlcad done right, you can get a 10x or better performance boost
19:37.43 brlcad it would be our rt* tools that would use that interface, they currently call rt_shootray()
19:37.59 brlcad and one ray at a time is fired/compared against primitives
19:38.17 brlcad the idea is to dispatch bundles of rays and call rt_vshootray() instead, which would call the vshot routines
19:39.30 Izakey Okay. Makes sense
19:51.02 Izakey brlcad My archer doesn't render wireframes after I did an svn up date the other day. have an idea how I can fix this ?
19:57.08 mihaineacsu Izakey: do you get a particular message when you try to render it?
19:57.33 Izakey mihaineacsu No
19:58.01 Izakey I double click on all objects and no wire frame shows up
19:59.10 Izakey wonders if he needs a fresh checkout
20:02.13 mihaineacsu for now, an easy way out would be to revert to an earlier revision
20:02.50 Izakey Hmm. I'll see...
20:08.39 brlcad nothing immediate comes to mind that would have caused that, but you could try updating to previous commit revisions until you find a working version, then update forward until you find the broken version
20:08.46 brlcad basically a manual binary search
20:09.13 brlcad if you can find the commit or a small range of commits where the problem began, it is usually easy/obvious to fix
20:16.27 Ch3ck_ brlcad, still waiting for feedback on the patches
20:20.15 Izakey thanks brlcad
20:51.51 *** join/#brlcad yukonbob (~bch@216.190.25.246)
20:51.58 yukonbob hello #brlcad
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21:35.37 Notify 03BRL-CAD:brlcad * 62396 brlcad/trunk/src/conv/3dm/conv3dm-g.cpp: revert c62148 as it removed a comment documenting a magic number (no hard-coded numbers should persist without documentation)
22:04.51 Notify 03BRL-CAD:brlcad * 62397 brlcad/trunk/src/libbu/parallel.c: consolidate the sun-only var with the code that uses it to reduce/simplify
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