Pd-list February 2010

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121 participants
201 discussions

[line ] repeats current state before ramp
by ypatios 16 Feb '10

16 Feb '10

hello |0, 10 200 ( <-- click here | [line ] | [print ] . . this prints the following: . ************ print: 0 print: 0 <-- ??? print: 1 print: 2 print: 3 print: 4 print: 5 print: 6 print: 7 print: 8 print: 9 print: 10 ************ Why should line repeat zero in this case? If you use "set" you lose the first zero (which is anyway normal) but you still get the second one. Shouldn't line start with the first step instead of repeating its last state? ciao -- ypatios

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[PD-announce] Workshop Pd in Dakar (Senegal)
by Jack 15 Feb '10

15 Feb '10

Hello, There is a Pd workshop at Ecole Supérieure Multinationale des Télécommunications (ESMT) in Dakar this saturday 20th. For more information : http://www.triasculture.net/ ++ Jack _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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Image detection on Pd.
by Blinge 15 Feb '10

15 Feb '10

Hellow. Im just searching for some different techniques about image capturing and motion detection and i would like to know if some of u are working on it using pd or if u can help me to follow some pd-topics about to receive and interpretate data from a webcam. Â¿Its also possible? :D Thank u all for taking part on this mailing list!

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Re: [PD] Image detection on Pd
by Marco Donnarumma 15 Feb '10

15 Feb '10

Hi, you may find interesting this tutorial by Max Neupert: http://web.uni-weimar.de/medien/wiki/Bewegungsmelder then there are few useful patches in: pd browser (cntrl+b) > examples > GEM > 04.video > 03.movement-detection.pd pd browser > manuals > 2.Image > 17.tracking.pd this is just to start. You may also want to check GridFlow, Pdp + opencv... cheers M Hellow. > > Im just searching for some different techniques about image capturing > and motion detection and i would like to know if some of u are working > on it using pd or if u can help me to follow some pd-topics about to > receive and interpretate data from a webcam. ?Its also possible? :D > > Thank u all for taking part on this mailing list! >

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pix_video, webcam issue on Linux
by PSPunch 15 Feb '10

15 Feb '10

Hi all, This may not be specific to Pd/Gem.. I have a webcam I am trying to get working with [pix_video] in the following environment. - Ubuntu Studio 9.04, - Pd-extended 0.41.4 (.deb for the above distro) - Gem 0.92.2 The camera works fine with Skype for Linux and v4l-test. However, when specifying the device with [pix_video], I get a series of errors such as, v4l: VDIOCGCHAN: Invalid argument v4l: VIDIOCGMBUF: Invalid argument I've seen posts on this list related to similar errors, in the case of pdp, with advise to bypass the conditional jumps near where the defines appear... this did not work with Gem. (Tried with videoVL4.cpp) After some surfing, my understanding as of now is that Gem is trying to issue V4L functions, whereas my webcam driver only understands V4L2.. Is this so? I would appreciate advise on insight on what could be happening here, or even just workarounds to this case. Here are some hardware specs I gathered, followed by the output of Gem (or they could be from ioctl... I am new to V4L). -- Output of v4l_dump (http://www.raphnet.net/programmation/v4l_tools/) Using device /dev/video0 struct video_capability { name='Laptop_Integrated_Webcam_0.3M' channels=1 audios=0 maxwidth=640 maxheight=480 minwidth=48 minheight=32 } VIDIOCGCHAN: Invalid argument struct video_picture { brightness=32768 hue=32768 colour=41942 contrast=0 whiteness=0 depth=16 palette=8 } -- Pd main window output [pix_video]: video driver 0: video4linux v4l // <--- On object ctreation verbose( 1):[pix_video]: device-err: 0 // <--- When sending [device /dev/video0 < verbose( 0):v4l: stopped Transfer verbose( 1):v4l::startTransfer closing 6 -- Console output ( When sending [device /dev/video0< ) v4l: VDIOCGCHAN: Invalid argument v4l: VDIOCGCHAN: Invalid argument v4l: VIDIOCGMBUF: Invalid argument Thank you in advance.. -- David Shimamoto

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Netsend and netreceive problems
by Andrew Faraday 15 Feb '10

15 Feb '10

Hey all I'm trying to get [netsend] and [netreceive] to work on a small group of computers on Ubuntu 10.04. They are not otherwise networked (IE, they're not used for file transfer or internal messaging) although they are all connected to one router via a switch. So I think netsends should work. However, after attempting to connect the netsend object to an IP address (found on the other machine via www.whatsmyip.com, could this be the same IP?) PD crashes. I've no idea why, no error messages I can see before crashing. Help would be appreciated. Thanks Andrew _________________________________________________________________ Send us your Hotmail stories and be featured in our newsletter http://clk.atdmt.com/UKM/go/195013117/direct/01/

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[PD-announce] [Belgium] Position offered: Interactive Media Lab Assistant / Guest Lecturer
by Multimediale Vormgeving 15 Feb '10

15 Feb '10

Position offered: Interactive Media Lab Assistant / Guest Lecturer --------------------------------------------------------------------------------------- Application deadline: Februari 28, 2010 Starting in March 2010, the Multimedia Design department of St Lucas Art College in Ghent plans to install an ongoing workshop aimed at interactive media. The workshop functions as a support base for students who want to develop multimedia projects which involve physical computing and sensory input. The workshop assistant actively works with students on technical solutions towards the realization of their projects. The workshop assistant also assists students in scripting web-based portofolio applications Candidate profile - Should have a proven track record in developing physical computing applications and web-based applications. - Should have a broad working knowledge of and hands-on experience with several of the following IDE's and languages: Processing, Pure Data, Max/MSP, Arduino, Actionscript 3.0, PHP, Javascript/JQuery, HTML/CSS, Ruby - Should possess practical electronics skills and is able to prototype circuitry involving sensors, microprocessors and computers (Arduino). - Has excellent communication skills and is fluent in Dutch, English or both. - Has an open-minded, problem-solving and adaptive attittude towards artistic ideas. Practicalities - A temporary position under the statute of guest lecturer on freelance basis. - Starting in March until June of 2010. One day per week, number of weeks TBD. - Fee + travel expenses. - Possibility of continuation in following semester after positive evaluation. How to apply Please submit a resume, examples of finished and ongoing creations and a short motivational text to han.vandenhoof AT kunst.sintlucas.wenk.be _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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White noise, Gaussian White Noise
by Guilherme Lunhani 15 Feb '10

15 Feb '10

Hi, I have a doubt about random generator in [noise~]: I would like to make a "gaussian white noise", buti don't know if [noise~] have (or not) a gaussian probablistic function that generate random numbers... well, i send a [gaussian~] that i make for comparisons Thanks Abstract: [gaussian~] #N canvas 130 291 1151 548 10; #X obj 76 273 gauss; #X obj 292 247 expr if($f1==0 \, 0.5 \, $f1); #X obj 292 1 loadbang; #X obj 318 60 \$2; #X obj 292 60 \$3; #X obj 346 60 \$1; #X obj 346 83 expr if($f1==0 \, 100 \, $f1); #X obj 346 105 * 44.1; #X text 389 107 100ms; #X text 484 188 sigma = 1/12; #X text 451 247 mu = 0.5; #X obj 76 51 route generate bang play; #X obj 76 23 inlet; #N canvas 0 22 450 300 (subpatch) 0; #X array \$0-gaussian_noise 10 float 3; #A 0 -0.00524598 0 0 0 0 0 0 0 0 0; #X coords 0 1 10 -1 200 70 1; #X restore 277 334 graph; #X msg 373 152 resize \$1; #X obj 442 151 s \$0-gaussian_noise; #X obj 346 128 t f f; #X obj 103 190 counter; #X obj 76 372 tabwrite \$0-gaussian_noise; #X obj 76 82 t b b; #X msg 122 99 0; #X obj 76 158 t b f; #X msg 146 17 generate; #X obj 75 129 for++ 0 4410; #X obj 401 -4 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X floatatom 505 247 5 0 0 0 - - -; #X floatatom 567 187 5 0 0 0 - - -; #X floatatom 429 106 5 0 0 0 - - -; #X obj 318 186 expr if($f1==0 \, 0.083 \, $f1); #X obj 76 301 * 2; #X obj 76 330 - 1; #X obj 120 482 outlet~; #X obj 172 482 outlet; #X obj 120 450 tabplay~ \$0-gaussian_noise; #X obj 534 66 samplerate~; #X obj 293 32 t b b b b; #X obj 534 87 / 1000; #X connect 0 0 29 0; #X connect 1 0 0 2; #X connect 1 0 25 0; #X connect 2 0 35 0; #X connect 3 0 28 0; #X connect 4 0 1 0; #X connect 5 0 6 0; #X connect 6 0 7 0; #X connect 7 0 16 0; #X connect 7 0 27 0; #X connect 11 0 19 0; #X connect 11 1 33 0; #X connect 11 2 33 0; #X connect 12 0 11 0; #X connect 14 0 15 0; #X connect 16 0 23 1; #X connect 16 1 14 0; #X connect 17 0 18 1; #X connect 19 0 23 0; #X connect 19 1 20 0; #X connect 20 0 17 2; #X connect 21 0 0 0; #X connect 21 1 17 0; #X connect 22 0 11 0; #X connect 23 0 21 0; #X connect 24 0 35 0; #X connect 28 0 0 1; #X connect 28 0 26 0; #X connect 29 0 30 0; #X connect 30 0 18 0; #X connect 33 0 31 0; #X connect 33 1 32 0; #X connect 34 0 36 0; #X connect 35 0 4 0; #X connect 35 1 3 0; #X connect 35 2 5 0; #X connect 35 3 34 0; #X connect 36 0 7 1; #X coords 0 -1 1 1 215 110 1 270 300; Help: #N canvas 184 300 547 305 10; #X msg 16 62 generate; #X obj 16 254 dac~; #X msg 33 86 play; #X text 71 62 generate random numbers; #X text 67 86 or; #X obj 90 87 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X text 241 120 args: time \, sigma(variation) \, mu; #X text 241 137 default: time: 100ms \, sigma: 1/12 \, mu: 0.5; #X obj 231 245 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X obj 16 123 gaussian~ 2000 0.083 0.5; #X obj 286 56 noise~; #X obj 357 223 samplerate~; #X text 289 274 Guilherme Lunhani \, gcravista(a)gmail.com; #X connect 0 0 9 0; #X connect 2 0 9 0; #X connect 5 0 9 0; #X connect 9 0 1 1; #X connect 9 0 1 0; #X connect 9 1 8 0; #N canvas 184 300 547 305 10; #X msg 16 62 generate; #X obj 16 254 dac~; #X msg 33 86 play; #X text 71 62 generate random numbers; #X text 67 86 or; #X obj 90 87 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X text 241 120 args: time \, sigma(variation) \, mu; #X text 241 137 default: time: 100ms \, sigma: 1/12 \, mu: 0.5; #X obj 231 245 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X obj 16 123 gaussian~ 2000 0.083 0.5; #X obj 286 56 noise~; #X obj 357 223 samplerate~; #X text 289 274 Guilherme Lunhani \, gcravista(a)gmail.com; #X connect 0 0 9 0; #X connect 2 0 9 0; #X connect 5 0 9 0; #X connect 9 0 1 1; #X connect 9 0 1 0; #X connect 9 1 8 0;

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Re: [PD] Dynamic Object Creation
by Marco Donnarumma 14 Feb '10

14 Feb '10

Sorry if you already took a look at those patches, but you might want to check the Pd browser > manuals/ > pd-msg/ > 1.msg_and_patch/ M > Hello List, > > I know this has been addressed a few times on the list in past years, > but I couldn't find any concrete instructions.. so, here's my > question. What is the best way to approach dynamic object creation? > I'm hoping that there are some messages that can create instances of > abstractions or objects. If these exist, are they documented > somewhere? > > Thanks everyone! > > -Ben >

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(dynamically, temporarily) suppressing error message printing
by Matteo Sisti Sette 14 Feb '10

14 Feb '10

Hi, When I dream about the Pd of the future one of the few new features I see (not so few as in Miller's dreams) is error handling. In the meantime, is there a way to suppress (and restore) the printing of error messages in the console? Maybe by sending some message to pd? I'm using [textfile] to read and write files, and sometimes I cannot foresee in advance whether a file exists or not, so I detect the file doesn't exist by checking whether the [textfile] contains any message after reading it (by banging it etc)... (ok I can't distinguish between file-not-found and empty file but it's fine for me by now) So in these cases I'd like to avoid printing an error message for a condition that is indeed ok. Especially because it can happen a lot of times and generate a huge lot of "junk" (in this case) erro rmessages which make it difficult to read real useful output. If I could send Pd a message to suppress error messages, I would do it just before reading the file and restore them just after... Is that possible? Any other trick? P.S. in Pd Vanilla if possible. thanks m. -- Matteo Sisti Sette matteosistisette(a)gmail.com http://www.matteosistisette.com

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Pd-list February 2010