--- Log opened Fri Apr 22 00:00:10 2011
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00:20 < kanzure> this seems sketchy
00:20 < kanzure> http://www.atxdevcenter.org/
00:20 < kanzure> they claim they are fablab
00:21 < kanzure> ok they are hosted on weebly they're full of shit
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05:17 < dbolser> http://www.theregister.co.uk/2011/04/15/google_hpc_donation/
05:17 < dbolser> Google is giving away 1x10^9 hours of cpu to academics
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07:10 < JayDugger> Good morning, everyone.
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07:13 < JayDugger> Any thoughts on the Cupcake CNC sale? (http://blog.makerbot.com/2011/04/20/final-batch-of-cupcake-cnc-ultimates-now-available/)
07:27 < ThomasEgi> 700 bucks?
07:29 < ThomasEgi> quite a price for such a small printer. but if you want to avoid the hassle of building all parts yourself it seems like a fair price
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07:39 < JayDugger> Well...the alternative looks like a prusa mendel from from makergear.com, for US$825.
07:39 < JayDugger> The real goal of a 3D printer is to improve the quality of my (still-as-yet-unbuilt) book scanner.
07:40 < JayDugger> That said, I don't care to buy second-rate goods.
07:40 < JayDugger> And I have more money than time. (The $3000 Up! printer is out, though.)
07:42 < JayDugger> TechZone has a $799 Reprap Mendel kit.
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07:44 < JayDugger> That also tempts me.
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09:48 < kanzure> http://letters.cunningprojects.com/?p=144
09:48 < kanzure> "It’s a plasmid I designed to make cloning in Bacillus subtilis easier, faster and more reliable. Crucially, it’s also supposed to make the whole process antibiotic-free."
09:49 < kanzure> i guess he hasn't tested it yet
09:54 < kanzure> looks like saul has jumped ship from squidlabs? http://www.otherlab.com/team
09:56 < kanzure> Real-Time Observation of Transcription Initiation and Elongation on an Endogenous Yeast Gene http://www.sciencemag.org/content/332/6028/475
09:57 < kanzure> "It has not yet been experimentally possible to observe the activity of single polymerases on an endogenous gene to elucidate how these events occur in vivo." what a tease
10:23 < kanzure> wtf the guy who did boole-1.1 teaches at texas A&M and collaborated on todd's knife-edge microscope
10:24 < kanzure> hehe "Acquisition and Reconstruction of Brain Tissue Using Knife-edge Scanning Microscopy "
10:51 < kanzure> what a bizarre way to do map generation..
10:51 < kanzure> http://graphics.stanford.edu/%7Epmerrell/model_synthesis.pdf
10:51 < kanzure> more: http://graphics.stanford.edu/~pmerrell/modelSynthesis.htm
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10:54 < dbolser> hi Erik49
10:56 < Erik49> hola
10:57 < kanzure> hello
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12:06 < kanzure> backyard brains is playing around with optogenetics now...
12:06 < kanzure> http://www.youtube.com/watch?v=-SaQx3ktNSg
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12:37 < kanzure> wow "CATIA uses polyhedral approximations for intersection and boundary computations"
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12:59 < dbolser> kanzure: there is no text for that vid
12:59 < dbolser> what is going on there?
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13:19 < kanzure> dbolser: drosophila emg hooked up to /dev/audio
13:19 < kanzure> spikes triggered by uv light
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15:17 < fenn> the examples in the 3d texture synthesis paper are all depressingly 2d in nature
15:17 < fenn> city streets, castles, forests
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17:10 < Lukas__> huzzah
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20:09 < kanzure> fenn: i've found these papers particularly interesting
20:09 < kanzure> http://www.cparity.com/projects/AcmClassification/tr1.1/237751.pdf
20:09 < kanzure> which is called "an efficient surface intersection algorithm based on lower-dimensional formulation"
20:10 < kanzure> and "Efficient representations and techniques for computing b-rep's of csg models with nurbs primitives"
20:10 < kanzure> http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=918387F44FDE152B110BA9255D389583?doi=10.1.1.130.2724&rep=rep1&type=pdf
20:11 < kanzure> thought you might like to follow along at least peripherally
20:14 < kanzure> there's a more rigorous treatment of this in "Geometric and Solid Modeling" which is available all over the web as an ebook/pdf
20:14 < kanzure> .. but those papers seem to give a more "updated" treatment
20:15 < kanzure> the advantage of krishnan's papers is that boole-1.1 is an exact implementation and the variable names are the same in the code and in the paper.. win?
20:30 < fenn> does boole actually do trimmed curve BREP intersections?
20:30 < fenn> er, trimmed surface
20:34 < fenn> (yes) nm
20:40 < kanzure> also brlcad has the beginnings of an implementation of the boole-1.1 code in proc-db/surfacesurface.cpp from gsoc 2009
20:40 < kanzure> based on opennurbs.. but it wasn't ever completed :/
20:41 < kanzure> the kid gets points for doing it with opennurbs and making it slightly maintainable, but loses points for not finishing his work
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20:42 < fenn> what was the point there? brlcad uses implicit geometry for its intersection code
20:43 < kanzure> brlcad doesn't support nurbs, though
20:43 < fenn> but, uh.. uh. nevermind.
20:43 < kanzure> it's ok we can just give up and use OpenCSG to make the GPU do all the hard work for us
20:43 < kanzure> :rolleyes:
20:44 < fenn> does opencsg use gpgpu?
20:44 < kanzure> no iirc it's just some trick with opengl where it makes opengl automagically compute the final completed object's mesh
20:45 < fenn> i guess that's why it never worked right in ayam
20:45 < kanzure> what was wrong?
20:45 < fenn> it just showed the union of the solids
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20:46 < kanzure> if i can get an implementation working i'm sending it to matt and asking for a master's. :<
20:46 < fenn> lulz
20:46 < kanzure> isn't that how this shit goes down?
20:46 < fenn> no, you have to write some stupid paper about something nobody gives a shit about
20:47 < fenn> then go to some conferences or something
20:47 < kanzure> *shrug* nobody has written a good, clean, liberally licensed implementation that is *also documented in a paper*
20:47 < kanzure> siggraph would love to have this i'm sure..
20:47 < fenn> isn't that what boole does?
20:47 < kanzure> the license is fucked up
20:47 < kanzure> plus the code isn't the best
20:48 < kanzure> yeah let's name our variables "tp" and "ipv21"
20:48 < kanzure> fuck you
20:48 < kanzure> no unit tests, either... seems like this should be unit tested to hell and back
20:49 < kanzure> opencascade doesn't unit test either. who wants to bet that parasolid doesn't, either? :/
20:49 < fenn> you could write some tests, probably find some bugs
20:50 < fenn> not sure i see the point though unless you want to write a cad UI
20:50 < kanzure> why would i write a cad ui
20:50 < fenn> or is this supposed to be a replacement for openscad?
20:50 < kanzure> yes
20:51 < kanzure> or liberityware replacement for any other cad, ideally..
20:51 < fenn> ok. my only request is that you not create your own new language
20:51 < kanzure> i just want god damn scriptable, open source CAD with nurbs and boolean operations and really really simple things
20:51 < kanzure> sure.. lolcad is the start of that
20:51 < kanzure> toybrep is also almost exactly like lolcad
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20:51 < kanzure> just some python classes laying aruond for playing with nurbs
20:51 < fenn> what's wrong with toybrep?
20:51 < kanzure> it's even less feature complete than lolcad
20:52 < kanzure> https://bitbucket.org/bryancole/toybrep
20:52 < fenn> okay. make some pictures of what it can do
20:52 < kanzure> lolcad+toybrep should be merged
20:52 < kanzure> right now neither can do anything
20:52 < kanzure> lolcad can generate step files that can be loaded into heekscad and opencascade, though :)
20:52 < fenn> i can't be bothered to grok all of two code bases i may or may not ever use
20:52 < kanzure> i can show you a picture of a few spheres and boxes..
20:52 < kanzure> yeah don't bother looking at the code bases
20:52 < kanzure> until their's boolean operations
20:53 < fenn> does lolcad use opencascade?
20:53 < kanzure> no
20:53 < kanzure> it's my own nurbs classes and visualization using opengl
20:53 < fenn> so why can't you make a picture of the model loaded into opencascade?
20:53 < kanzure> i could.. do you really want to see a sphere that bad?
20:54 < kanzure> i might have a screenshot laying around.. uhh
20:54 < fenn> well.. you could write a script that does something with spheres
20:54 < kanzure> for what
20:54 < kanzure> http://diyhpl.us/~bryan/screenshots/2010-08-24-1610-runten-pynurbs.png
20:54 < kanzure> http://diyhpl.us/~bryan/screenshots/2010-08-30-0234.png
20:54 < kanzure> simple nurb surface playground
20:55 < fenn> but that doesn't have anythign to do with STEP export
20:55 < kanzure> so what?
20:55 < kanzure> step export doesn't matter if you don't have anything to export :)
20:55 < kanzure> oh you want the step export screenshot duh
20:55 < fenn> i just don't quite get what you're trying to do
20:56 < kanzure> you know how openscad has .scad files?
20:56 < kanzure> i just want to write python scripts, run them and optionally visualize the results
20:56 < kanzure> without using openscad, opencsg, opencascade, or any other weird library or oddly licensed library
20:56 < fenn> and make .stl and .step files to do other stuff with, no?
20:56 < kanzure> yes so that i can pipe it down into further cad systems, sure
20:56 < kanzure> "compatibility"
20:57 < kanzure> python make_planetary_gears.py | solidworks -
20:57 < kanzure> not that solidworks would ever work like that >:o
21:05 < kanzure> plus.. i could potentially apply my work on reverse engineering solidworks' file formats and get a parametric output-to-solidworks going. that'd be hot shit.
21:17 < fenn> yeah but how do you know what are parameters and what are just numbers? (or does it matter)
21:18 < fenn> god dammit i suck at writing documents for stupid people
21:18 < fenn> i've been procrastinating on this hplus thing for weeks ("please explain what a HUD is and why someone would want one")
21:19 < fenn> my bandwidth out < 100baud
21:20 < fenn> units 1960byte/2week Definition: 0.012962963 bit / s
21:23 < kanzure> why the fuck don't they know what a HUD is
21:23 < kanzure> "if you don't know i'm not telling" hahah
21:24 < kanzure> btw, for "how do you know what are parameters and what are just numbers" -> presumably by reading bytecode for their file export routines?
21:32 < fenn> i thought you were going to import into solidworks
21:32 < fenn> both would be useful though
21:33 < kanzure> solidworks plugin thingy i was working on was gitduino-related
21:40 < fenn> as far as gitduino goes, can't you just use the embedded thumbnail?
21:48 < kanzure> no for gitduino it was revision control integration
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22:22 < kanzure> hrm "Cdk-2 Controls Myelin Production in the CNS
22:22 < kanzure> "
22:22 < kanzure> blah quoting
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23:03 < kanzure> it's kind of lame that nobody has uploaded marcus' "biopunk" book yet
23:07 < fenn> i doubt anybody has read it :P
23:10 < kanzure> mom did O_o
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23:13 < JayDugger>  http://amzn.to/eeUGZE, correct?
23:14 < kanzure> dumb poser punks ain't even punking right
23:22 < JayDugger> Didn't you get a complimentary copy of the book?
23:28 < fenn> you should hire R.U. Sirius to write the biopunk fakebook
23:28 < JayDugger> Ha. That's a fine idea.
23:28 < fenn> aka "how i learned to stop worrying and love twitter"
23:50 < jrayhawk> The patch to Ikiwiki to get it to work with git without an existing head is surprisingly simple, but rather noisy.
23:50 < jrayhawk> I sent it to Joey; we'll see what he says.
--- Log closed Sat Apr 23 00:00:10 2011