| --- Log opened Fri Apr 22 00:00:10 2011 | ||
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| kanzure | this seems sketchy | 00:20 |
|---|---|---|
| kanzure | http://www.atxdevcenter.org/ | 00:20 |
| kanzure | they claim they are fablab | 00:20 |
| kanzure | ok they are hosted on weebly they're full of shit | 00:21 |
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| 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 | 05:17 |
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| JayDugger | Good morning, everyone. | 07:10 |
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| JayDugger | Any thoughts on the Cupcake CNC sale? (http://blog.makerbot.com/2011/04/20/final-batch-of-cupcake-cnc-ultimates-now-available/) | 07:13 |
| ThomasEgi | 700 bucks? | 07:27 |
| 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 | 07:29 |
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| 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. | 07:39 |
| 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.) | 07:40 |
| JayDugger | TechZone has a $799 Reprap Mendel kit. | 07:42 |
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| JayDugger | That also tempts me. | 07:44 |
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| 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." | 09:48 |
| kanzure | i guess he hasn't tested it yet | 09:49 |
| kanzure | looks like saul has jumped ship from squidlabs? http://www.otherlab.com/team | 09:54 |
| kanzure | Real-Time Observation of Transcription Initiation and Elongation on an Endogenous Yeast Gene http://www.sciencemag.org/content/332/6028/475 | 09:56 |
| 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 | 09:57 |
| kanzure | wtf the guy who did boole-1.1 teaches at texas A&M and collaborated on todd's knife-edge microscope | 10:23 |
| kanzure | hehe "Acquisition and Reconstruction of Brain Tissue Using Knife-edge Scanning Microscopy " | 10:24 |
| 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 | 10:51 |
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| dbolser | hi Erik49 | 10:54 |
| Erik49 | hola | 10:56 |
| kanzure | hello | 10:57 |
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| kanzure | backyard brains is playing around with optogenetics now... | 12:06 |
| kanzure | http://www.youtube.com/watch?v=-SaQx3ktNSg | 12:06 |
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| kanzure | wow "CATIA uses polyhedral approximations for intersection and boundary computations" | 12:37 |
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| dbolser | kanzure: there is no text for that vid | 12:59 |
| dbolser | what is going on there? | 12:59 |
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| kanzure | dbolser: drosophila emg hooked up to /dev/audio | 13:19 |
| kanzure | spikes triggered by uv light | 13:19 |
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| fenn | the examples in the 3d texture synthesis paper are all depressingly 2d in nature | 15:17 |
| fenn | city streets, castles, forests | 15:17 |
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| Lukas__ | huzzah | 17:10 |
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| 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" | 20:09 |
| 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 | 20:10 |
| kanzure | thought you might like to follow along at least peripherally | 20:11 |
| 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 | 20:14 |
| 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? | 20:15 |
| fenn | does boole actually do trimmed curve BREP intersections? | 20:30 |
| fenn | er, trimmed surface | 20:30 |
| fenn | (yes) nm | 20:34 |
| 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 :/ | 20:40 |
| kanzure | the kid gets points for doing it with opennurbs and making it slightly maintainable, but loses points for not finishing his work | 20:41 |
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| fenn | what was the point there? brlcad uses implicit geometry for its intersection code | 20:42 |
| 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: | 20:43 |
| 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 | 20:44 |
| 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 | 20:45 |
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| 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 | 20:46 |
| 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 | 20:47 |
| 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 | 20:48 |
| 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 | 20:49 |
| 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 | 20:50 |
| 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 | 20:51 |
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| 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 | 20:51 |
| 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 | 20:52 |
| 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? | 20:53 |
| 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 | 20:54 |
| 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 | 20:55 |
| 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" | 20:56 |
| kanzure | python make_planetary_gears.py | solidworks - | 20:57 |
| kanzure | not that solidworks would ever work like that >:o | 20:57 |
| 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. | 21:05 |
| fenn | yeah but how do you know what are parameters and what are just numbers? (or does it matter) | 21:17 |
| 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") | 21:18 |
| fenn | my bandwidth out < 100baud | 21:19 |
| fenn | units 1960byte/2week Definition: 0.012962963 bit / s | 21:20 |
| 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 | 21:23 |
| kanzure | btw, for "how do you know what are parameters and what are just numbers" -> presumably by reading bytecode for their file export routines? | 21:24 |
| fenn | i thought you were going to import into solidworks | 21:32 |
| fenn | both would be useful though | 21:32 |
| kanzure | solidworks plugin thingy i was working on was gitduino-related | 21:33 |
| fenn | as far as gitduino goes, can't you just use the embedded thumbnail? | 21:40 |
| kanzure | no for gitduino it was revision control integration | 21:48 |
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| kanzure | hrm "Cdk-2 Controls Myelin Production in the CNS | 22:22 |
| kanzure | " | 22:22 |
| kanzure | blah quoting | 22:22 |
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| kanzure | it's kind of lame that nobody has uploaded marcus' "biopunk" book yet | 23:03 |
| fenn | i doubt anybody has read it :P | 23:07 |
| kanzure | mom did O_o | 23:10 |
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| JayDugger | http://amzn.to/eeUGZE, correct? | 23:13 |
| kanzure | dumb poser punks ain't even punking right | 23:14 |
| JayDugger | Didn't you get a complimentary copy of the book? | 23:22 |
| 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" | 23:28 |
| 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. | 23:50 |
| --- Log closed Sat Apr 23 00:00:10 2011 | ||
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