Pd-list March 2009

pd-list@lists.iem.at

134 participants
220 discussions

Gem-0.91-3 pd 0.42-4
by thomas thiery 26 Mar '09

26 Mar '09

Hello IOhannes, I use this source of Gem, is it the last? http://downloads.sourceforge.net/pd-gem/gem-0.91-3.tar.gz?use_mirror=heanet Cheers Thomas

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latency spikes on linux when sending wiimote's rumble and LED messages
by Ivica Ico Bukvic 26 Mar '09

26 Mar '09

Greetings all, Has anyone encountered issues with the wiimote external (pd-extended 0.42 on 8.10 Ubuntu 2.6.29-rc6-rt kernel) when using "rumble" and/or LED commands? The system appears to be rock solid in terms of audio latency (thanks to the rt kernel) until I use one (or both) of the aforesaid features. As soon as rumble and/or LED are enabled, I get xruns practically every other millisecond reported by Pd (red button on the main Pd window). JACK shows no xruns. The wiimote has a few other minor bugs (e.g. disabling accelerometer monitoring does not actually work which is I guess no biggie). I guess I could try to run wiimote in an non-rt instance of Pd next to the rt instance processing audio, but before I take that route I was wondering if I had possibly missed something or if there is a simpler way. Best wishes, Ivica Ico Bukvic, D.M.A. Composition, Music Technology Director, DISIS Interactive Sound & Intermedia Studio Assistant Co-Director, CCTAD CHCI, CS, and Art (by courtesy) Virginia Tech Dept. of Music - 0240 Blacksburg, VA 24061 (540) 231-6139 (540) 231-5034 (fax) ico(a)vt.edu http://www.music.vt.edu/faculty/bukvic/

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Darwiin Remote OSC and PD, on Mac
by Nicanor Garcia 26 Mar '09

26 Mar '09

Hello. I need some help trying to connect Darwiinremote ( http://code.google.com/p/darwiinosc/downloads/list) Mac program to PD in a friend's computer. I'm tryining to connect it through OSC, but I can't get the PD to receive anything. I set up the same port in both programs, but I think I'm missing the address. In Linux, which I use in my computer, I had to use "localhost" as the address but I don't know what to use in Mac. I already googled and found nothing quickly and I'm really in a hurry as I have to set up that for a very important project. Thank you very much and sorry about my english as is not my first language. Nicanor.

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still struggling with basic understanding of Gem dataflow
by John Harrison 26 Mar '09

26 Mar '09

Attached is a small example patch of how I just don't get Gem...still... [pix_rtx] has a steady wave that normally flows from left to right. I would have thought that the attached patch shows me rotating the image first, then applying [pix_rtx]. So it would stand to reason in my mind I would see a rotated image with [pix_rtx] flowing from left to right. But that isn't the result I see. The patch has [pix_rtx] flowing from right to left now. It is as if [pix_rtx] is applied *before* the rotation instead of *after* as I would have expected. Grasping at straws, I have tried [pix_separator] between just about every object, but that makes no difference. What am I misunderstanding that makes the behavior of the patch make sense? And...how would I get [pix_rtx] to flow from left to right on a mirrored image? -John P.S. Are questions like this better on the Gem-dev list? That's a developer list but at the same time I feel a bit awkward putting too many Gem questions on a Pd list #N canvas 962 171 305 227 10; #X obj 29 -58 gemhead; #X obj 29 -35 pix_video; #X obj 29 44 pix_texture; #X obj 28 72 rectangle 4 3; #X obj 159 9 gemwin; #X msg 136 -34 create \, 1; #X msg 214 -33 destroy; #X obj 135 -57 loadbang; #X obj 29 17 pix_rtx; #X obj 29 -10 rotateXYZ 0 180 0; #X connect 0 0 1 0; #X connect 1 0 9 0; #X connect 2 0 3 0; #X connect 5 0 4 0; #X connect 6 0 4 0; #X connect 7 0 5 0; #X connect 8 0 2 0; #X connect 9 0 8 0;

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Re: [PD] Darwiin Remote OSC and PD, on Mac
by Simon Kilshaw 26 Mar '09

26 Mar '09

Hey, For my part, when I use Darwiinmote OSC on the mac it kicks out on port 5600. So I use the object DumpOSC 5600. Happy to share patch if you like. puredata(a)rwcmd.ac.uk Simon Kilshaw Lecturer in Music Technology RWCMD Message: 4 Date: Wed, 25 Mar 2009 22:17:31 -0500 From: Nicanor Garcia <purengo(a)gmail.com> Subject: [PD] Darwiin Remote OSC and PD, on Mac To: pd-list(a)iem.at Message-ID: <5f57e84f0903252017n316ca6al7570f3bae27f32f4(a)mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" Hello. I need some help trying to connect Darwiinremote ( http://code.google.com/p/darwiinosc/downloads/list) Mac program to PD in a friend's computer. I'm tryining to connect it through OSC, but I can't get the PD to receive anything. I set up the same port in both programs, but I think I'm missing the address. In Linux, which I use in my computer, I had to use "localhost" as the address but I don't know what to use in Mac. I already googled and found nothing quickly and I'm really in a hurry as I have to set up that for a very important project. Thank you very much and sorry about my english as is not my first language. Nicanor.

1 0

Re: [PD] style guide idea: [send foo] versus [; foo(
by Matt Barber 26 Mar '09

26 Mar '09

> hmm.. generally this could be a good idea, but message sending is most useful > when initialising a number of receives ie: > > [loadbang] > | > |; init-1 6 / > |; init-2 symbol foo | > |; init-3 -2 \ > > which is far more elegant than the the trigger/send replacement, especially > with more fields.. > > i think its important for students to recognise that this feature of messaging > has a role to play, rather than trying to veil its use. in my experience > people will tend to use [send foo] more often when they start pd, then begin > abbreviating to [s foo] before they appreciate the msg shorthand [; foo[. but > you are right it is a little confusing for new users.. > Also note that some objects, e.g. [qlist], positively depend on the message sending style. My students who wanted to use them have often wondered why we hadn't covered the two ways of sending more in depth. Matt

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Re: [PD] stop animation/motion in pd/gem
by mark edward grimm 25 Mar '09

25 Mar '09

> examples/pdp/example12.pd from pdp does something similar, thats great. i had never seen that one! thanks for pointer.... > GridFlow has a nervous_video.pd > patch that shows how to store a bunch of frames in a big > grid... that looks pretty elegant and will give it a shot on linux machine... BTW was wondering though if there are any plans to implement gridflow in extended? it would benefit our freshmen students for ease of installation/use on osx machines they now all run and i would love to demo this "nerv_vid" example... > ToonLoop, I immediately thought about this music video made > in 1986: > http://www.youtube.com/watch?v=oMylfkSDKV0 awesome! i dont remember ever seeing that one before.... not even in the '80's!! - mark --- On Thu, 3/19/09, Mathieu Bouchard <matju(a)artengine.ca> wrote: > From: Mathieu Bouchard <matju(a)artengine.ca> > Subject: Re: [PD] stop animation/motion in pd/gem > To: "mark edward grimm" <mgrimm(a)syr.edu> > Cc: "pd_list Listserve" <pd-list(a)iem.at> > Date: Thursday, March 19, 2009, 4:36 PM > On Thu, 19 Mar 2009, mark edward > grimm wrote: > > > i just stumbled on "toonloop": > > http://alexandre.quessy.net/?q=toonloop > > When, two weeks ago, my girlfriend introduced me to > ToonLoop, I immediately thought about this music video made > in 1986: > > http://www.youtube.com/watch?v=oMylfkSDKV0 > > > just got me interested/curious if someone has written > a similar patch in pd (toonloop = processing.org).... > > Should be fairly simple. GridFlow has a nervous_video.pd > patch that shows how to store a bunch of frames in a big > grid... for 32 frames of 240 rows of 320 columns of 3 > channels, you just make a grid of size (32 240 320 3) and > that's all. > > _ _ __ ___ _____ ________ _____________ > _____________________ ... > | Mathieu Bouchard - tél:+1.514.383.3801, Montréal, > Québec

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OSCX or mrpeach/osc ?
by Alvaro 25 Mar '09

25 Mar '09

Hi, I'm working on a new patch that uses OSC. I've been using OSCX so far, but then I came accross a page on pdpedia that claims OSCX is no longer maintained, and that I should use mrpeach's objects instead. SVN history seems to confirm this, but then OSCX worksforme, is well documented, and there are plenty of examples. So, I don't want to step on anybody's toes, but what is the right choice for a new project? The alternative, to build an abstraction layer, would mean a lot of extra work. mrpeach are you there? alvarito

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What font does PD use?
by Ben Baker-Smith 25 Mar '09

25 Mar '09

I'm working on some graphics for PdCon09 to potentially use for promotional materials. Could someone tell me what font PD uses? Or at least a close approximation? If it's not a regular font, does someone have a copy of the font file? Thanks, -Ben

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Re: [PD] still struggling with basic understanding of Gem dataflow
by Ben Baker-Smith 25 Mar '09

25 Mar '09

Hi John, You are correct. Gem does not follow the normal top to bottom rules of PD. I believe its render chain has more to do with the rules of OpenGL than with PD. Sorry I can't give you an easy way of figuring which objects will be processed first. If there is one then I've never heard/read it. Keep experimenting. For more information on this, I recommend looking up the "a flawed Gem" thread in the PD-List archives (and whatever thread that came out of). It'll give you some more information about Gem's relation to OpenGL and some users frustration with similar situations as yours. I love using Gem, it's the environment I primarily work in when using PD. However, it's a bit of a wild beast (at least to a non-programmer like myself). Best of luck, -Ben >[Gemhead] >| >[object 1] >| >[object 2] >| >[object 3] > >we cannot conclude that the output of [object 1] feeds the input of [object >2] and the output of [object 2] feeds the input of [object 3]. We only know >that the data will be processed by objects 1, 2 and 3 but not in what order >they will be processed. > >Further perhaps we cannot conclude that the output of an object is actually >the result of the object having processed the data. Demonstrating this: in >my patch example, [pix_buffer_write] outputs different data than it stores, >or examples 1 and 3 would be the same. > >And this leads me to a more general statement of my original question: how >can I determine the order in which objects are processed in Gem? > >And my specific example which started this thread: how would one apply a >rotation to an image, then apply [pix_rtx] to the rotated image? > >-John

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Pd-list March 2009