| --- Log opened Tue Aug 10 00:00:17 2010 | ||
| kanzure | fenn: ON_MeshSurface just seems to be "evaluate the normal of the given surface, figure out a vector and a point, and then throw that into a MeshFace object" also with some weird north east / north west / south east / south west index counting going on? | 00:15 |
|---|---|---|
| kanzure | "The meshing source code is not included with the free openNURBS toolkit." | 00:16 |
| QuantumG | hehe | 00:19 |
| QuantumG | so, here's another idea for ya, why don't you just calculate convex hulls | 00:19 |
| QuantumG | there's some rendering tricks for intersecting them to get non-convex hulls | 00:20 |
| QuantumG | and it's about the fastest b-rep you can make | 00:20 |
| kanzure | hrm | 00:24 |
| kanzure | http://www.opengl.org/sdk/docs/man/xhtml/gluNewNurbsRenderer.xml | 00:24 |
| kanzure | better: http://glprogramming.com/red/chapter12.html | 00:25 |
| QuantumG | that is nice | 00:28 |
| kanzure | this really makes things a lot simpler. | 00:41 |
| kanzure | http://groups.yahoo.com/humanityplusboard | 00:43 |
| kanzure | "Finally, the order parameters, uorder and vorder, can be different, allowing patches that are cubic in one direction and quadratic in the other, for example." | 00:47 |
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| kanzure | actually some of this might be a moot point.. in the STEP output that i'm generating i have things like SPHERICAL_SURFACE which, in the STEP definition, isn't anything but a name (i.e. it doesn't define a spherical surface in the definition) | 00:54 |
| kanzure | "spherical is left as an exercise to the implementors" i guess? | 00:54 |
| kanzure | fenn: check out this weirdness | 00:58 |
| kanzure | http://www.steptools.com/support/stpship_docs/html/t_dimen-03.html | 00:58 |
| kanzure | an example from part203.exp: metre : RETURN(dimensional_exponents(1,0,0,0,0,0,0)); | 00:58 |
| kanzure | siemens : RETURN(dimensional_exponents(-2,-1,3,2,0,0,0)); | 00:58 |
| kanzure | although radian and steradian are both RETURN(dimensional_exponents(0,0,0,0,0,0,0)); hm.. | 00:59 |
| kanzure | oh. sphere is like the only case where this happens apparently. | 01:09 |
| kanzure | even brlcad has to deal with it | 01:09 |
| kanzure | in brlcad-7.16.8/src/conv/step/BRLCADWrapper.cpp | 01:10 |
| kanzure | BRLCADWrapper::WriteSphere(double *center, double radius) is basically just: mk_sph(outfp, "s1", center, 10.0) or in other words a call to "make sphere" | 01:11 |
| kanzure | everything else goes through BRLCADWrapper::WriteBrep which takes an ON_Brep which i'm guessing is the same ON_Brep object from opennurbs | 01:12 |
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| kanzure | why isn't a sphere just a curve on a sphere and then stretched around 360 degrees? | 01:28 |
| kanzure | pyopengl samples for this stuff: | 01:35 |
| kanzure | http://www.java2s.com/Open-Source/Python/Development/PyObjC/trunk/pyobjc/PyOpenGL-2.0.2.01/OpenGL/Demo/dek/texturesurf2.py.htm | 01:35 |
| kanzure | http://pyopengl.sourceforge.net/documentation/manual/glMap2.3G.html (although svn.sf.net has been broken since forever i think) | 01:35 |
| kanzure | heh had it on my hard drive all along. | 01:36 |
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| splicer_ | ...or Biopunk? | 09:08 |
| splicer_ | sorry... wrong window | 09:09 |
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| AndroUser | Good morning, everyone. | 09:39 |
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| kanzure | hi AndroUser | 10:45 |
| kanzure | huh steve wozniak is on facebook and has a large mutual friend intersection with me | 10:45 |
| bkero | The woz | 10:50 |
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| kanzure | hrm | 11:38 |
| kanzure | someone suggests adding a status to social networking websites for whether or not you have a communicable infection | 11:38 |
| kanzure | and then educating people to avoid contact with others during those periods when they are planning meetups and stuff | 11:38 |
| kanzure | the argument is that this would effectively cut off the virus from spreading | 11:39 |
| kanzure | social isolation strategies like that could backfire i guess? | 11:39 |
| splicer | maybe memebots should fall into the 'communicable infection' category. | 11:55 |
| AJollyLife | anyone going to the singularity summit this weekend? | 12:19 |
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| * fenn shrugs | 12:23 | |
| fenn | you'd think there would be reviews of audio recording devices with actual maximum recording time | 12:24 |
| fenn | i'm about ready to build my own.. how hard could it be? | 12:26 |
| AJollyLife | why would you build your own? | 12:27 |
| fenn | can fit a lotta wave files on 16GB | 12:27 |
| fenn | because all this stuff is designed for some other use case (either hi fi music recording or executive business person notes to themself) | 12:28 |
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| fenn | also they seem to use a huge amount of battery power (29 hours for 2 AAA batts is almost as bad as an incandescent flashlight) | 12:29 |
| AJollyLife | whats your use case? | 12:30 |
| fenn | recording everything constantly | 12:30 |
| fenn | preferably timestamped correctly | 12:30 |
| AJollyLife | id be a big fan of that use case | 12:30 |
| fenn | somehow a video (and audio) recorder costs $1.50 from china? | 12:31 |
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| AJollyLife | i'd love to just voice record everything around me, with a decent mike, and time stamp it nicely, that way i could go back and sync it with my photos | 12:32 |
| fenn | that's the idea | 12:32 |
| AJollyLife | i wonder if it would be easier to just write software for android to do it | 12:34 |
| fenn | i dont have a phone | 12:34 |
| AJollyLife | ah | 12:34 |
| fenn | but yes i think it would | 12:34 |
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| fenn | why is an mp3 codec IC $20 | 12:35 |
| AJollyLife | licensing? | 12:36 |
| fenn | why is an ogg codec IC $20 then? | 12:36 |
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| AJollyLife | no idea | 12:42 |
| * fenn grumbles about usb host mode on android phones | 12:43 | |
| kanzure | AJollyLife: i have some discount codes for the summit if you'd like.. but you're probably volunteering | 12:43 |
| AJollyLife | kanzure: thanks, but yeah, im shooting the conference | 12:44 |
| kanzure | righto | 12:44 |
| fenn | kanzure what do you mean discount codes? | 12:45 |
| kanzure | when you sign up you can type in a little code thingy to get a discount anywhere from bringing the price down a few dollars to basically free | 12:46 |
| fenn | basically free sounds good | 12:46 |
| * kanzure nods | 12:46 | |
| kanzure | you want? | 12:46 |
| fenn | yeah | 12:46 |
| kanzure | see pm | 12:47 |
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| fenn | huh "Your registration is a tax-deductible donation." | 12:50 |
| fenn | doesnt that mean they can't give preferential treatment to people who havent paid? | 12:50 |
| fenn | s/havent/have/ ig uess | 12:51 |
| kanzure | what does "preferential treatment" mean? | 12:51 |
| fenn | like, letting you be there or not | 12:51 |
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| fenn | AJollyLife: did they mail you any tickets or anything? | 13:04 |
| AJollyLife | fenn: just an e-mail confirmation | 13:05 |
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| kanzure | your name is probably added to a list | 13:06 |
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| jrayhawk | There are a few phones with host-mode USB. | 13:16 |
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| bkero | Nexus One | 13:18 |
| fenn | it it illegal to record your own phone calls? | 13:18 |
| jrayhawk | http://sven.killig.de/android/N1/2.2/usb_host/ http://wiki.maemo.org/N900_Hardware_USB_Host etc | 13:18 |
| kanzure | fenn: customer support does it all the time, right? | 13:19 |
| jrayhawk | Depends on which U.S. state you're in, but yes, usually. | 13:19 |
| kanzure | "i wire-tap on my own phone calls so i can listen to myself while i talk" | 13:19 |
| fenn | "i wire tap my tap dancing shoes so i can tap while i tap" | 13:19 |
| kanzure | "i might be monitoring our call so that i can more positively assist you in the future" hahah | 13:19 |
| fenn | "this phone call may be recorded for digital avatar reconstruction purposes" | 13:20 |
| jrayhawk | The n810 supports host mode USB out of the box. | 13:21 |
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| kanzure | fenn: can you figure out any particular reason that the STEP standard defines a "spherical surface" without referencing breps or nurbs? | 13:22 |
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| fenn | wow why are the n810 batteries so cheap | 13:23 |
| fenn | 3.7V 1500mAh $2.29 shipped (can it be true?) | 13:23 |
| jrayhawk | They're a common Nokia battery, as I recall. | 13:23 |
| kanzure | jrayhawk: i don't remember but i think you're partial to n810 over n900 because you have an n810? or was there another reason | 13:23 |
| kanzure | gee common batteries for multiple phones, what a concept. | 13:24 |
| jrayhawk | I have both. The n810 was targeted as a professional tool and the n900 was targeted as a consumer vanity item. | 13:25 |
| kanzure | huh. | 13:25 |
| fenn | what's the actual difference? | 13:25 |
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| jrayhawk | n810: larger, one more keyboard row, better protected by metal bits, supports host mode USB. n900: has cellular modem, a better supported 3D engine, composite out. | 13:27 |
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| jrayhawk | The n810's hardware is also sufficiently well understood to shove whatever kernel you like on, while the n900 is crippled by a binary-only battery management system. | 13:29 |
| jrayhawk | Supposedly that's being aggressively worked on as part of the Meego project, though. | 13:29 |
| fenn | ug. somehow i just said "two more weeks" | 13:30 |
| * fenn cries | 13:30 | |
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| kanzure | "two more weeks" what? | 13:31 |
| fenn | jrayhawk: can i get host USB _and_ composite out? | 13:31 |
| fenn | kanzure: at omnivision | 13:31 |
| fenn | doing ... nothing basically | 13:31 |
| jrayhawk | If you're willing to take the hacky approach described in the second link at 13:18 | 13:31 |
| fenn | could you summarize? | 13:32 |
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| fenn | is this like, "plug in a usb mini a cable while booting the phone" | 13:32 |
| kanzure | jrayhawk: timestamps aren't shared in here | 13:32 |
| jrayhawk | oh, right | 13:32 |
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| fenn | oh i have timestamp, sorry i thought he was referring to a time in a video | 13:33 |
| kanzure | oh hm | 13:33 |
| kanzure | now he'll think there's some anti-sharing-timestamps-for-videos policy in here | 13:33 |
| fenn | there is | 13:33 |
| kanzure | there is? | 13:34 |
| jrayhawk | http://wiki.maemo.org/N900_Hardware_USB_Host I *think* it's "compile, install module, manually twiddle sysctls either before or after you plug in a USB thing to enable host or gadget mode" | 13:34 |
| fenn | as part of the revolutionary user's front to release all websites | 13:34 |
| jrayhawk | haha | 13:34 |
| kanzure | you mean the shell user's revolutionary front against the web (surfraw) | 13:34 |
| fenn | ahem, yes | 13:34 |
| kanzure | oh it's revolutionary front RAGE against the web | 13:34 |
| kanzure | even better. | 13:34 |
| kanzure | http://surfraw.alioth.debian.org/ | 13:35 |
| fenn | i'm not so full of rage really | 13:35 |
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| kanzure | ok how about quite revolution | 13:35 |
| * kanzure goes back to tinkering with code | 13:35 | |
| kanzure | quiet | 13:35 |
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| jrayhawk | Oh yeah, the n810 also comes with a bitchin' mount, which enables you to do terribly irresponsible things like use IRC from your car or bike. | 13:40 |
| AJollyLife | heh. thats why i need a hardware keyboard...so i can txt when driving | 13:40 |
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| jrayhawk | I assume this was designed for use with the built-in GPS, but it's also pretty cool to have a portable touch-screen multimedia system you can bring with you. | 13:43 |
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| kanzure | ? | 14:53 |
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| kanzure | i don't know where to write this down but someone is suggesting that i turn meetlog.txt / 1kfriend.ly into a connection/contact brokering system and then use analysis and diagnostics to more effectively get return on the brokering actions | 15:03 |
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| kanzure | "Sorry, I'm not sure I follow. You did this analysis by hand for 40k tags and 9000 people? I do not mean to seem incredulous, but it sounds like years worth of work." | 15:07 |
| kanzure | [B[B[Bheh | 15:07 |
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| kanzure | "sapolsky of stanford to develop a vaccine for stress" | 15:51 |
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| fenn | "Thanks for registering for the 2010 Singularity Summit. This is your confirmation." derr, no magic numbers? | 15:54 |
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| kanzure | they probably check a name or an id | 16:03 |
| fenn | it will probably be somebody that knows me anyway | 16:04 |
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| fenn | so change in plans for the wearable, these batts are cheap enough and energy dense enough that i'm just going to switch to them | 16:08 |
| fenn | http://cgi.ebay.com/Nokia-BP-4L-Battery-BP4L-E63-E71-E90-E90i-E61i-N810-/330453200030?pt=PDA_Accessories | 16:08 |
| fenn | hm only one sold so far | 16:11 |
| fenn | so 5V - 0.8V diode drop shouldn't over charge a Li-po pack right? | 16:16 |
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| fenn | huh, cpkb http://cpkb.org/wiki/Nokia_BP-4L_battery_pinout | 16:31 |
| fenn | cell phone knowledge base | 16:31 |
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| kanzure | how to make a sphere out of nurbs http://www.geometrictools.com/Documentation/NURBSCircleSphere.pdf | 16:34 |
| kanzure | i'm really surprised the first result was exactly what i was looking for | 16:34 |
| fenn | oh yeah, wild magic, forgot about that | 16:39 |
| kanzure | i read the site but can't figure out what it does | 16:39 |
| fenn | it's sorta like a game engine i guess | 16:39 |
| kanzure | did you see http://glprogramming.com/red/chapter12.html from the backlog? | 16:41 |
| fenn | no | 16:41 |
| * fenn looks | 16:41 | |
| fenn | bezier's aren't nurbs | 16:42 |
| fenn | bezier's are cubic splines, nurbs are quintic | 16:42 |
| fenn | (and for some reason this matters?) | 16:43 |
| fenn | or i'm full of crap | 16:44 |
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| kanzure | i'm inclined to trust this page | 16:44 |
| kanzure | it's well written *and* it has example code | 16:44 |
| fenn | i didnt know gl had a nurbs object | 16:44 |
| fenn | glu* | 16:44 |
| kanzure | me either :) | 16:44 |
| kanzure | i ran into it while reading brlcad source code | 16:45 |
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| fenn | all these different batteries... madness | 16:47 |
| fenn | n900 uses a 60x38x5.5mm battery, n810 uses 66x44x5mm battery | 16:47 |
| fenn | was it really worth the half a millimeter? | 16:47 |
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| kanzure | fenn: i'm having some trouble with the workflow in that pdf file | 17:19 |
| kanzure | presumably i have to evaluate some equation to come up with a set of control points for the nurbs | 17:19 |
| kanzure | are the bernstein polynomials the values of the control points? | 17:19 |
| kanzure | "This representation is not unique, but one possibility appears below" what? | 17:37 |
| kanzure | i think this article sucks http://en.wikipedia.org/wiki/Non-uniform_rational_B-spline | 17:37 |
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| kanzure | http://www.tc184-sc4.org/SC4_Open/SC4_Standards_Developers_Info/Files/STEP_application_handbook_63006.pdf | 18:29 |
| kanzure | fenn: here's the entire STEP standard on the web | 18:38 |
| kanzure | http://www.tc184-sc4.org/SC4_Open/SC4%20Legacy%20Products%20%282001-08%29/STEP_%2810303%29/ | 18:38 |
| kanzure | also, this is ridiculous | 18:38 |
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| kanzure | meeting notes from some AP203 meeting: http://www.tc184-sc4.org/SC4_Open/SC4%20Legacy%20Products%20%282001-08%29/STEP_%2810303%29/Files/minutes.txt | 18:40 |
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| fenn | i've seen that before, there's nothing useful there | 19:03 |
| fenn | it's not "the standard" | 19:04 |
| fenn | so apparently nobody sells a voice recorder that isn't some stupid AAA battery thing with a big honkin speaker | 19:05 |
| fenn | all i want for christmas: a stereo microphone jack, an sd card slot, a button to start/stop | 19:06 |
| fenn | actually a switch would be better, good old fashioned mechanical switch | 19:06 |
| * fenn hunts for glucose | 19:07 | |
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| kanzure | "The real question is what would you want to accomplish by managing 10,000 conversations/threads/weak ties?" | 20:42 |
| kanzure | world domination? | 20:42 |
| kanzure | presumably it's the journey not the destination that matters | 20:46 |
| kanzure | and since nobody has done 10k or 100k relationships before in any meaningful way i guess it's sort of unprecedented and there's no eral answer | 20:51 |
| kanzure | *no real answer | 20:52 |
| kanzure | i don't think i could even answer that if he used the number 5 | 21:02 |
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| kanzure | ben goertzel suggests http://www.amazon.com/Weak-Links-Universal-Stability-Collection/dp/3540311513 | 21:15 |
| kanzure | from that minutes.txt file: "There are still needs that remain unfulfilled such as: parametrics, | 21:15 |
| kanzure | solid model history, etc." | 21:16 |
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| genehacker | solid model history? | 21:29 |
| kanzure | STEP apparently doesn't do revision history or parametric stuff. | 21:32 |
| fenn | if you want to make a circular hole bigger you're screwed | 21:33 |
| kanzure | so i'm confused.. is there any /actual/ parametric CAD format that can be interchanged between CAD systems and kernels? | 21:33 |
| kanzure | i know that solidworks saves parametric information.. | 21:34 |
| kanzure | but nothing reads .sldprt except solidworks | 21:35 |
| kanzure | oh well. i'm still a little confused about how to convert from STEP to raw NURBS | 21:35 |
| AJollyLife | fenn: if you do find a suitable voice recorder let me know | 21:38 |
| genehacker | WHAT? I thought it did | 21:38 |
| genehacker | also going to see a presentation tomorrow by the fab@home guys on their file format that is supposed to be better than g-code and .stl | 21:39 |
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| kanzure | "Example 12-5 renders a NURBS surface in the shape of a symmetrical hill with control points ranging from -3.0 to 3.0. The basis function is a cubic B-spline, but the knot sequence is nonuniform, with a multiplicity of 4 at each endpoint, causing the basis function to behave like a Bezier curve in each direction." | 23:43 |
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| --- Log closed Wed Aug 11 00:00:17 2010 | ||
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