Pd-list September 2006

pd-list@lists.iem.at

139 participants
230 discussions

physical computing: Lanbox, Arduino
by tim 07 Sep '06

07 Sep '06

Ok people, thanks for all the suggestions so far. We decided to use the LanBox LCE, and some Arduino's. However we now face quite some riddles on how to go about it... I wonder if someone has even used a LanBox on pd, afaics there is no mention of it on the list... Below, I will describe how I plan to do it. My idea of the set up so far: 1) LanBoxLCE and 12 channel switchpack for the motors and lamps control signals (out) 2) arduino's + relay cards to monitor the end-of-line switches, other sensors in the space..etc. 3) all programming on pd, running on a linux (apodio) desktop computer. questions, questions, questions: 1) So I want to use the lanbox simply as an interface to send 'on/off' control signals to the switchpack from pd. Do I need the [lanbox] pd external ? if yes, where can I find it ? Is there a compiled version somewhere (linux/windows) ? How do I configure the LanBox, is there a simple preset that I can just upload to it ? 'Read me.txt' says I have to update the firmware, the CD contains 'LCE-firmware v2.06.dat', but I have no clue what to do with it. 'LCeditPlus tutorial.html' speaks about LanBox-LC, only, not LCE... 2) I want to read incoming data from 2 or 3 arduino's inputs and use that to influence the output signals. I have some problems testing them on windows now: when I leave it plugged in and restart the computer, apparently the arduino is regarded as a mouse that goes crazy. The mousepointer jumps around the screen randomly and clicks everywhere...(strange but true!) On Linux I still have to get the arduino to work... In the pd patch for testing, all inputs seem to react somewhat together. There is a photoresistor connected to one inlet, but the others seem to react to it too. 3) The LCedit+ 3.4 software for the lanbox is windows only, but I gather I just need it to initialize the lanbox once, after wich I can just send it control signals from pd on Linux? There are examples for MaxMSP, not for pd. Should I switch to MaxMSP ? Hope someone can shed some light on this... Thank you, Tim

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Re: [PD] puredata.info user migration
by alberto.zin＠poste.it 07 Sep '06

07 Sep '06

Hi IOhannes, I changed the password, but apparently there are no more members in http://puredata.info/Members (if you search any particular Member it does not find anyone). The following http://puredata.org/Members/AlbertoZ still works. Alberto

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Re: [PD] Make a grid for choosing videos. How
by IOhannes m zmoelnig 07 Sep '06

07 Sep '06

Javier GarcÃa wrote: > Thanks IOhannes, but > >> [bng][bng][bng] >> [bng][bng][bng] >> [bng][bng][bng] >> >> connect each [bng] to another messagebox holding the filename of the >> video you want to trigger; then connect all of them to: >> >> | >> [symbol] >> | >> [open $1( >> | >> [pix_film] >> > > > anyway to see the frame-icon of the video? > no. Gem outputs to a special "gem-window" and not to a pd-canvas. there are no plans to change this (at least not in a a way you intend it) a solution for you would be: generate thumbnails from your videos via an off-pd script (choose your favourite tool) use one of the tcl/tk image-loading externals (don't ask me for a specific library; i don't know it, but most likely there are several of them (iemgui being one of them; no idea where to get a compiled version for osx (and whether it works on osx at all))) to load the thumbnails into your patch; depending on the object it might react on clicks or you have to put a [bng] below it... of course this is rather non-dynamic. btw: always reply to the pd-list and not just to me in private. mfga.sdr .IOhannes

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Sysex out messages
by Stephane ANGOT 06 Sep '06

06 Sep '06

Hi I use pd 0.39-2 on a linux box, I'm searching a way to send midi sysex messages from pd to my keyboard controler. pd midi out is connected to the 2 midiin of my keyboard within qjackctl (alsa midi). Here is what my patch looks like: +----------------------+ | 240 xx xx xx xx 247 ( <-- this is a message box +----------------------+ | | +--------+ |midiout | +--------+ When I click on the message for sending the sysex, nothing happen... am I using the rights boxes for that? Are my inlet/outlet correctly connected? What is the meaning of the second (right) inlet of the midiout box? I read somewhere that it was the port number. What is a port? (sorry for my little knowledge in midi protocol) Does I have to connect it ? if yes, how ? A midiout help file may be necessary because I'm not the only guy who has posted on this subject (but I didn't find my answer). Thanks, Stephane.

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2 new utilities
by Andres Ferrari 06 Sep '06

06 Sep '06

please check my puredata.org webpage. there are 2 new utilities: object-list:for put externals and abstraction as object box in a patch.tested in osx with pd 0.39 teclado:gui monophonic keyboard. tested in osx with pd 0.39 please send my suggestions.thanks. AndrÃ©s Ferrari G. http://puredata.org/Members/anfex __________________________________________________ Correo Yahoo! Espacio para todos tus mensajes, antivirus y antispam Â¡gratis! RegÃstrate ya - http://correo.espanol.yahoo.com/

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Shanghai Pd person
by chris clepper 06 Sep '06

06 Sep '06

Are there any Pd uers on the list in Shanghai? There might be some paying tech support work on a Pd project there. Thanks cgc

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issue with help-patches in pd-0.40.0-testX
by Roman Haefeli 06 Sep '06

06 Sep '06

hi all, hi miller sorry, that i am *not* through yet with this topic. i still don't quite see through the system of the helppatches and how and in which order they are searched. anyway, i noticed a difference to 0.39, if not a bug. it seems that pd-0.40 cannot find helpfiles from some externals anymore, or in more accurate words: it actucally *finds* the helppatches, but it does not open them. showing helpfiles still works on pd's own objects and some externals like iemmatrix or gridflow. example: a) i have all zexy-helpfiles in: /usr/local/lib/pd/doc/5.reference/help-zexy/ b) so the helpfile of [date] is this: /usr/local/lib/pd/doc/5.reference/help-zexy/date.pd c) then i start pd with '-verbose'-flag and create a [date]. d) right-click on [date] -> help. the pd windows says: <paste> tried /usr/local/lib/pd/extra/zexy/date-help.pd and failed tried /home/roman/netpd/doc/zexy/date-help.pd and failed tried /usr/local/lib/pd/doc/5.reference/help-gridflow/zexy/date-help.pd and failed tried /usr/local/lib/pd/doc/5.reference/help-iemmatrix/zexy/date-help.pd and failed tried /usr/local/lib/pd/doc/5.reference/zexy/date-help.pd and failed tried /usr/local/lib/pd/extra/zexy/date-help.pd and failed tried /usr/local/lib/pd/extra/help-zexy/date.pd and failed tried /home/roman/netpd/doc/help-zexy/date.pd and failed tried /usr/local/lib/pd/doc/5.reference/help-gridflow/help-zexy/date.pd and failed tried /usr/local/lib/pd/doc/5.reference/help-iemmatrix/help-zexy/date.pd and failed tried /usr/local/lib/pd/doc/5.reference/help-zexy/date.pd and succeeded </paste> everything ok so far, since it could find the appropriate help-file, but the terminal (stderr) says: <paste> open: /usr/local/lib/pd/doc/5.reference/help-zexy/help-zexy/date.pd: No such file or directory help-zexy/date.pd: No such file or directory </paste> and pd doesn't open this non-existing file, of course. this is *only* on 0.40 and only with externals, which add their directory name to the searchpath (like zexy, Gem, iemlibs). roman ___________________________________________________________ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de

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[PD-announce] Techniques book, version 0.09
by Miller Puckette 06 Sep '06

06 Sep '06

... and also announcing, Version 0.09 of The Theory and Technique of Electronic Music is available on: http://www-crca.ucsd.edu/~msp/techniques.htm This was a proofreading pass, in which I think over 1000 errors got fixed... including a couple of major ones. cheers Miller _______________________________________________ PD-announce mailing list PD-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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piping into pd
by Marius Schebella 06 Sep '06

06 Sep '06

Hi, I want to feed the log-output of an apache2 server into Pd. I know that it is possible to pipe the access_log (or any other log-output) of the apache2 to a process, by defining something like CustomLog "|/usr/bin/send_to_pd" common On the Pd side I would like to use a receive, or a netreceive object. My problem is, that I don´t know how to join those two processes... Should I try to write a script (bash, perl, python?), or is there a way to pipe directly into pd? thanks, marius.

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[Ltilib-devel] PureData bindings (fwd)
by Mathieu Bouchard 06 Sep '06

06 Sep '06

---------- Forwarded message ---------- Date: Wed, 6 Sep 2006 03:12:37 -0400 (EDT) From: Mathieu Bouchard <matju(a)artengine.ca> To: Peter Doerfler <peter(a)ltilib.pdoerfler.com> Cc: ltilib-devel(a)lists.sourceforge.net Subject: [Ltilib-devel] PureData bindings On Wed, 30 Aug 2006, Peter Doerfler wrote: > BTW, it would be very interesting to learn what you are using the LTI-Lib > for. Maybe you could even submit a short summary with a link to a webpage to > our projects tracker at SF? In Ottawa U's Visual Arts department, Heri Andria made Ruby bindings for LTI-Lib by modifying the existing Python bindings. Then, using that, I made PureData/GridFlow bindings for LTI-Lib. GridFlow is a video library that I wrote for PureData using C++ and Ruby (with some parts in asm, Tcl, etc). a few examples of PureData code that uses LTI-Lib: http://gridflow.ca/gallery/lti.KMeansSegmentation-help.pd.gif This program is a helpfile for [lti.KMeansSegmentation]. Not all features of the C++ class are available in PureData at the moment, because that PureData class is written in Ruby, and the Ruby bindings are currently somewhat more developed than Python's but far from complete. The box [lti.KMeansSegmentation.param] is a subprogram used for configuring objects of that class; it is written in PureData, and currently part of that helpfile, but it will be decoupled as a PureData class file in order to be reused in other programs. http://gridflow.ca/gallery/%23moment-help.png This program finds the two-dimensional standard deviation of a greyscale image, and in this case, from a pair of rectangles as a simple test. I use two LTI objects here: given a variance matrix V, I need to compute the associated norm x'*V^-1*x, using which I can tell whether any point is inside the ellipse; this can be used to draw the ellipse (more elegantly than efficiently). Also, I want to find the radiuses and angle of that ellipse, so I eigendecompose V using [lti.Jacobi], to get A^-1*D*A where D is a diagonal matrix that has the squares of the radiuses; A represents a rotation by the angle that I'm looking for. What could be legitimately called the "standard deviation" of an image is either A^-1*sqrt(D) or sqrt(D)*A, because those are isomorphisms between the associated norm and the standard norm x'*x. The diagram is the program. _ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju | Freelance Digital Arts Engineer, Montréal QC Canada

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Pd-list September 2006