| 08:21.12 | *** join/#brlcad clock_ (n=clock@zux221-122-143.adsl.green.ch) | |
| 09:55.05 | *** join/#brlcad clock_ (n=clock@zux221-122-143.adsl.green.ch) | |
| 11:05.47 | *** join/#brlcad jpjacobs (n=jpjacobs@dib.ulyssis.student.kuleuven.be) | |
| 11:06.41 | jpjacobs | Hi, i made a debian package for brlcad. I have to say, i don't know anything about making packages, the dependancies are not set since i don't know how. |
| 11:07.47 | jpjacobs | but if anyone is interested anyway, i can upload it. (btw i also made a terminal-wrapper thing that sets the path's right, and should also modify ls-outputhiglighting (but that doesn't really work)) |
| 11:08.17 | brlcad | to the debian package tracker or elsewhere? |
| 11:08.27 | brlcad | i believe there is a rfp in for one |
| 11:09.09 | brlcad | otherwise, you can upload it to our anon ftp and I can post it to sf.net |
| 11:09.27 | brlcad | ftp.brlcad.org/incoming |
| 11:10.12 | jpjacobs | so it's ok that it's lacking dependancy info, and the brlterm thing isn't 10O% functional? |
| 11:10.40 | clock_ | tell me why when I stream there is no reply |
| 11:11.51 | jpjacobs | or anybody knows how i add the dependancies , and anyone want to look at the script? |
| 11:12.18 | brlcad | brlterm thing? |
| 11:12.33 | brlcad | clock_: when you stream where/to what? |
| 11:12.46 | clock_ | I am making jokes out of Roxette |
| 11:12.55 | clock_ | tell me why when I scream there is no reply |
| 11:13.03 | brlcad | jpjacobs: alas, I'm only passively familiar with the debian packages.. enough to put them together when I have to but not enough to properly review one |
| 11:13.20 | brlcad | clock_: ahh |
| 11:13.33 | clock_ | brlcad: I am thinking about making a complete model of Ronja in BRL-CAD |
| 11:13.34 | jpjacobs | Well, that's what i called the wrapper-script. It basically sets the right paths, and modifys LSCOLORS to contain entries for *.g and *.pix |
| 11:13.37 | clock_ | including the lens, heel, etc. |
| 11:13.54 | brlcad | jpjacobs: ah, okay |
| 11:13.56 | clock_ | I tried a lens in brl-cad and it really behaves like a lens. It even focuses the light of the light sources |
| 11:14.11 | brlcad | clock_: that would be awesome |
| 11:14.31 | brlcad | inclusion-worthy even with the right polish |
| 11:14.34 | clock_ | brlcad: can I put a point light source into the place of LED and it would make a circle of light on a wall? |
| 11:15.45 | brlcad | there's a way to add directional lights, and you can always direct an omnidirectional light by modeling the light bulb itself (e.g. putting a lightsource into a hollowed out cylinder) |
| 11:17.16 | clock_ | brlcad: I welded a truss holder and realized it can play spooky melodies |
| 11:17.26 | clock_ | http://ronja.twibright.com/audio/tetrax10.ogg |
| 11:18.18 | brlcad | heh |
| 11:18.18 | clock_ | and even made a Ronja ringtone out of it |
| 11:18.22 | clock_ | http://ronja.twibright.com/audio/ronja_rt.wav |
| 11:18.25 | clock_ | http://ronja.twibright.com/audio/ronja_rt.mp3 |
| 11:24.22 | brlcad | nice, pleasant even |
| 11:27.08 | clock_ | sounds to me like the background from the nightmare in elm street |
| 11:27.10 | jpjacobs | the .deb is uploading |
| 11:27.29 | clock_ | brlcad: but BRL-CAD cannot calculate how it's gonna sound, right? |
| 11:27.47 | clock_ | only how it's gonna look |
| 11:29.20 | brlcad | you'd have to write a sound simulation |
| 11:29.44 | brlcad | it can do the wave propagation using the multispectral library |
| 11:29.58 | jpjacobs | it's there |
| 11:30.05 | brlcad | but it would still require a lot of good simulation code to properly drive an acoustic simulation |
| 11:30.10 | brlcad | jpjacobs: okay |
| 11:30.36 | clock_ | what is wave propagation and multispectral library? |
| 11:30.37 | brlcad | jpjacobs: thanks! .. it'll be a couple days before it can be processed given the holiday |
| 11:31.25 | jpjacobs | np... if anyone has any tips on how to make it better, please contact me |
| 11:31.28 | brlcad | clock_: to calculate "how it's gonna sound" requires simulating sound waves, which is not unlike a light simulation that the ray-tracers perform where light waves are propagated |
| 11:31.51 | clock_ | brlcad: interesting |
| 11:32.20 | brlcad | jpjacobs: can I get a real name to properly credit the contribution? |
| 11:33.09 | brlcad | clock_: there's a multispectral simulation library in brl-cad for simulating different ranges of energies other than the visible light spectrum that liboptical simulates .. sound would qualify as a different spectrum ;) |
| 11:33.25 | jpjacobs | Jan-Pieter Jacobs. |
| 11:33.45 | brlcad | thx |
| 11:34.01 | jpjacobs | np |
| 11:34.13 | clock_ | brlcad: can it simulate microwave signature of F117? |
| 11:35.46 | brlcad | yep |
| 11:36.28 | brlcad | that's sort of the kinds of multispectral simulations it was designed for |
| 11:37.58 | clock_ | brlcad: the problem of the lens is that it has to be done as an intersection of two huge balls |
| 11:38.14 | clock_ | it's 13cm in diameter but the surface has curvature radius like 1m or so |
| 11:38.26 | clock_ | this causes a lot of discarded calculations, doesn't? |
| 11:39.03 | brlcad | spheres/ellipsoids are *the* fastest objects to evaluate, but yes, mildly discarded for parts |
| 11:39.21 | brlcad | not something I'd worry about to say the least |
| 11:39.31 | clock_ | can I speed it up to put it into a box and intersect with the box? |
| 11:39.59 | brlcad | that wouldn't speed it up |
| 11:40.06 | brlcad | two spheres will be way faster |
| 11:40.12 | clock_ | brlcad: can I use it to simulate optical systems? |
| 11:40.21 | brlcad | you can use an elliptical parabaloid, though |
| 11:40.23 | clock_ | Like 2 lens and tune it in BRL-CAD and only after try in reality? |
| 11:40.31 | brlcad | or a hyperboloid if that helps |
| 11:40.48 | clock_ | brlcad: no the lens has spherical surface, I can't use paraboloid or hyperboloid. |
| 11:40.51 | brlcad | http://ftp.brlcad.org/tmp/primitives/Primitives3_grouped_labels.png ehy and epa on the left |
| 11:41.23 | brlcad | you should be able to make a paraboloid that matches with the right parameters, no? |
| 11:41.50 | brlcad | or just stick with spheres, they're still more simple |
| 11:41.54 | clock_ | brlcad: can I make rotational paraboloid? |
| 11:42.04 | brlcad | rotational? |
| 11:42.15 | clock_ | brlcad: I mean like a parabolic mirror |
| 11:42.27 | clock_ | is it a special case of epa? |
| 11:42.42 | clock_ | like a mirror in flashlight |
| 11:43.16 | brlcad | two epa's one subtracting from the inside of the other |
| 11:43.33 | brlcad | offset is your mirror thickness |
| 11:44.12 | clock_ | aha I thought epa is that it cuts into a parabolic in one axis and ellipsis in the other |
| 11:44.42 | clock_ | too bad I have little time |
| 11:44.51 | clock_ | it will take long until I draw the whole Ronja in BRL-CAD :( |
| 11:45.05 | clock_ | and potatoid is possible too? :) |
| 11:45.27 | brlcad | now with bigger chunks! |
| 11:45.53 | clock_ | brlcad: the sketch does it mean I can make 2D blueprints like in Qcad? |
| 11:46.00 | clock_ | with dimensions etc.? |
| 11:49.16 | brlcad | it'll make the shapes, but not with dimensions like you're probably thinking |
| 11:49.49 | brlcad | it's rather basic 2D editing frankly, not recommended for anything except basic shapes for extrusion |
| 11:50.34 | brlcad | someone was looking into actually invoking qcad for the sketch editor and doing a transparent passthrough between the two apps but they didn't finish afaik |
| 11:50.44 | clock_ | can the sketch import DXF drawing? |
| 11:51.12 | brlcad | hmm |
| 11:51.59 | brlcad | not easily, technically, it'd be a pretty trivial modification to make but currently the dxf importer brings drawings in as 2D wireframe objects |
| 11:53.38 | clock_ | what can I do with 2D wireframe objects? |
| 11:56.35 | brlcad | view them |
| 11:57.04 | brlcad | support for 2D stuff in general is entirely lacking if you hadn't noticed.. we're solid modeling, not drafting |
| 11:57.29 | brlcad | the fact that it even lets you bring them in is a little "insulting" |
| 12:00.50 | clock_ | imagine the following task |
| 12:01.02 | clock_ | you want to make a hole in a steel plate 20cm in diameter |
| 12:01.11 | clock_ | but you only have 6mm drill. |
| 12:01.31 | clock_ | in qcad I draw a 20cm circle and then draw 6mm circles one always in the previous intersection |
| 12:01.38 | clock_ | that takes me like 2 minutes. |
| 12:01.47 | clock_ | I can't imagine how to do this in BRL-CAD |
| 12:02.57 | brlcad | because that's a rather 2d-centric task to start with perhaps, at least you have a 2d solution in mind |
| 12:03.10 | brlcad | for solid modeling, there is no such direct translation, you work entirely in 3d |
| 12:03.21 | brlcad | so you'd make cynlinders instead of circles |
| 12:03.30 | brlcad | but otherwise, not much different |
| 12:03.50 | brlcad | and it'd take me like 2 minutes for that particular thing too |
| 12:04.40 | clock_ | but they wouldn't touch precisely, would they? |
| 12:04.49 | brlcad | what wouldn't? |
| 12:05.31 | brlcad | the cylinders? sure, why not? they'll be whatever you make them be numerically |
| 12:06.01 | brlcad | no more or less aligned than specifying circles |
| 12:06.19 | brlcad | the only difference there is 2d description vs a 3d one |
| 13:25.02 | clock_ | brlcad: you would have to calculate the parameters of the cylinders externally |
| 13:25.14 | clock_ | you would have to write a program for that. That's not in 2 minutes. |
| 15:28.04 | Maloeran | Hiding in one's natural environment : http://xs309.xs.to/xs309/06474/DSCF0001.jpg |
