Pd-list May 2013

pd-list@lists.iem.at

95 participants
138 discussions

more about DS
by Roman Haefeli 28 May '13

28 May '13

Hi all Is it possible to have a scalar with a settable position, but which cannot be moved with mouse interaction? I figured I can use arrays to create grids of immutable scalars, but then I don't know how I can detect which specific element/scalar has been clicked on. Thanks, Roman

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RE : Re: first exercise with data structures
by colet.patrice 28 May '13

28 May '13

Datastructure behaves exactly like C language, if all variables and functions are already writen on a paper or with merise or UML, like it would usually be done with a c or c++ program, variable naming and memory allocation becomes easier. In C this is exactly the same method for accessing a place in memory, traversing a template, from pointer to another, if you want to access directly a particular place in memory, use arrays instead. It's possible to change scalars with textfile like I suggested in my first message in this topic. Patrice Colet -------- Message d'origine -------- De : Roman Haefeli <reduzent(a)gmail.com> Date : 28/05/2013 9:57 (GMT+00:00) A : pd-list <pd-list(a)iem.at> Objet : Re: [PD] first exercise with data structures Thanks for sharing your mind on the topic. Probably this has already been covered as a limitation and may I haven't really understood it. There is one thing troubling me at the moment. From what I can see, you can easily get data out of your data structure. And for what I am trying, editing data manually/per GUI is quite easy. But how to set data programmatically, i.e. by message? As you can only change a certain scalar by setting a pointer to it, the only way I see is to traverse all scalars until you find the one you want to change. Is this currently the only way to change a property of a particular scalar? Roman On Sam, 2013-05-25 at 12:13 +0200, João Pais wrote: > jonathan already gave a smart reply to your question, using variable > variables as delimiters in your polygons, you can vary everything. If you > notice, in your first example you could vary the position of the > individual array elements (because you don't have a fixed x distance), but > you couldn't vary the position of the whole array - which wasn't necessary > for now, but I just wanted to remark that. > > I would add only something to your [setsize bar_struct bar_array] > construct: in case you want to get a pointer of a specific template, use > the template's name as argument e.g. [pointer bar_struct], and route the > exit of the 2nd outlet to a [next(. That creates a loop that only stops > when you get your pointer. if you have several scalars of the same > template, adding a [get ...] to that loop makes it better (in case you > have a sort of identifier for each scalar). > > A not-so-efficient-as-Jonathan's example of dynamic polygons can be seen > in my [jmmmp/bezier] abstraction (attached also the upcoming audio > version). Inside my folder are a couple other abstractions using data > structures (some new ones might appear only in the next pd-ext release). > > I wouldn't say "don't bother with data structures", but rather "work a lot > with it and make pressure so that they get improved". besides Jonathan's > remarks, there are many other simple things that make life harder: lack of > methods for simple operations (select previous pointer, or previous/next X > pointers), math or expr functions inside of data-s templates (you need to > get the data and then set it again), can't delete scalars without using > the delete key or clearing the whole canvas, ... > many small things that make one patch a lot just to make simple operations. > and the biggest problem, rendering. don't even try to think of using > data-s for any high-rate GUI. for that better to look at GEM. > > looking at Miller's words, data structures was one of the main reasons to > start Pd. after all this time, they didn't change that much. > > very nice would be to have Ircam's FTM library implemented in Pd, but it > seems to be an impossible task, someone has tried already. > > > > On Fre, 2013-05-24 at 16:13 -0700, Jonathan Wilkes wrote: > >> Here's a quickly made approach that uses quanta syntax and checks > >> for mouse manipulations from the outlet of [struct]. > > > > Thanks a lot. A lot of new stuff (for me) in your example. > > > >> I wouldn't recommend spending too much time learning data structures. > >> They are _extremely_ limited with the current implementation. > > > > I appreciate your advice. I have the impression one finds out about the > > limitations only by diving into data structures a bit more deeply. > > Although I haven't a clear picture yet what is possible and what is not, > > I find some of the examples in Millers documentation quite intriguing. > > > > Roman > > > > > >> ----- Original Message ----- > >> From: Roman Haefeli <reduzent(a)gmail.com> > >> To: pd-list <pd-list(a)iem.at> > >> Cc: > >> Sent: Friday, May 24, 2013 6:15 PM > >> Subject: [PD] first exercise with data structures > >> > >> Hi all > >> > >> Finally an attempt to dive into data structures. I read Frank > >> Barknecht's still excellent DS tutorial and, of course, section 4 of > >> Pd's help written by Miller Puckette, which is a bit more demanding, but > >> definitely very interesting. Though I can somewhat follow the simpler > >> example patches, the fundamental concepts are still a bit nebulous. > >> > >> Here's my problem. I found how to use [filledpolygon] to draw a > >> rectangle whose width can be changed by mouse interaction. When using > >> the same [struct] as the element of an array, I can draw many rectangles > >> which can be grabbed and moved by the mouse (x-y-array). However, when > >> it is used as an element, the ability to change the width dynamically > >> with the mouse is lost. When it is not part of an array, it cannot be > >> moved easily (without going into edit mode). How can I have both at the > >> same time? Is it even possible at all? > >> > >> Attached is an example that illustrates both cases. > >> > >> Roman > >> > >> _______________________________________________ > >> Pd-list(a)iem.at mailing list > >> UNSUBSCRIBE and account-management -> > >> http://lists.puredata.info/listinfo/pd-list > > > > > > > > _______________________________________________ > > Pd-list(a)iem.at mailing list > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > > _______________________________________________ Pd-list(a)iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list

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OSCroute question
by Jeppi Jeppi 28 May '13

28 May '13

Hi again,I would like to get rid of certain received OSC messages containing a particular string, say I want to filter out all /synth1 messages coming from lots of different sources a/synth1/parm2 0.45b/synth1/parm2 0.45c/synth1/parm2 0.45d/synth1/parm2 0.45(...) I could of course OSCroute all */synth1 manually (I can't specify a string beginning with * in OSCroute, everything goes thru) but, would it be a more elegant way to do so? Thanks in advance!Josep m

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Pd preferences dialog progress
by Jonathan Wilkes 28 May '13

28 May '13

Hi List, I've made some progress on the centralized preferences dialog window. Screenshot attached show the appearance under X11. Progress: * dropdown menus modeled after gtk for GNU/Linux (ttk::combobox) * native dropdown menus for Windows (ttk::combobox) * native-ish dropdown menus for OSX (ttk::menubutton) * multi-device button doesn't disappear when clicked (see attached audiodialog3.png) * audio api/settings/devices all in a single window * devices aligned in grid * removed cruft: unnecessary colons, device checkbuttons, label repetition * multi-device button disabled when there aren't multiple ins/outs * single "connect" button to clarify when Pd is supposed to open audio * can specify "None" as device (same as unchecking the device in the old audio dialog) * replaced "Apply" and "Ok" buttons with "Connect", which is more explicit. Also, it makes a nice flow from top to bottom: choose an api, the common audio settings, the specific devices (and device specific attributes: "channels"), and finally click "Connect". Connect also saves the audio settings-- I think that's generally what the user wants to do, and there can be a more general feature to make "profiles" if the user has a more complex/dynamic setup. I can also make it possible to specify no api (or a dummy one) if that's desirable. Screenshots currently lack a "Close" button which will be common to all preference frames. (I.e., at the bottom of the dialog below the notebook widget.) For my own sanity the API dropdown list currently shows Pd's api number as well as the API name. -Jonathan

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PdParty alpha now playing RjDj scenes
by Dan Wilcox 27 May '13

27 May '13

Howdy all, A quick status update on PdParty (https://github.com/danomatika/PdParty). RjDj scenes are now working. I've had fun today trying them all out again, especially Amenshake, NobleChoir, Eargasm & Where. Will look into implementing the [rj_image] object next. They work great on my iPad2. Just need to finish this and DroidParty gui abstraction support for the Beta. -------- Dan Wilcox @danomatika danomatika.com robotcowboy.com

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Store some lists with undo function?
by JF 27 May '13

27 May '13

I'm experimenting with a message sequencer that will play back time tagged lists. So far I've looked at [qlist] [textfile] and rjlib's [u_cocollect]. Are there any relatively simple approaches to 'undo'-ing the last list written to any of these objects? I'm a little stumped on it to be honest other than complicated writing to buffers and attempting to prune the last list somehow. Thanks, John.

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[helmholtz~]
by Phil Stone 27 May '13

27 May '13

Hi Katja, I'm looking with great interest at your [helmholtz~] pitch tracking object. I'm not asking to be lazy (I'm going to try it out for myself!), but I'm wondering if you have any general impressions of its performance as to how it compares with [sigmund~]. I'm particularly interested as to how it will do for tracking a fretless electric bass. It looks like an excellent piece of work, and I've enjoyed reading your detailed page about it. Phil Stone

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OT: another linux system question
by João Pais 26 May '13

26 May '13

Hello list, after trying debian squeezy for a few months on my Thinkpad X61s (an old model), I'm thinking of trying another distribution, due to several details. As I'm not up to date on the offer now, I wanted to ask what distributions are interesting nowadays (and in the future?). The reason why I changed from ubuntu to debian was because I found the latest ubuntu version very bloated. But now I have issues with several details that don't work on debian, and should work on a more "general" distro like ubuntu. So it might be better to go back to Ubuntu, and use a ligher desktop manager as gnome? I was looking for a system with LTS (I won't upgrade for as long as I can), modern (I need to try some programs now and then that require modern libraries and dependencies), and also light. The hardware is a bit old, and I need it mainly for Pd with Jack. I've seen many people speaking good things about linux mint. Is it worth it, or better to go directly to the "source", ubuntu? (but ubuntu's source, debian, isn't working well for me) Also important is that I don't have to spend time compiling, building and going through forums. Or I'll just loose my temper, and go back to windows for some years again. My hardware is: - Thinkpad X61s 64b (dual boot with windows 7) - but I'll use linux with 32b - RME Multiface I with PCMCIA card - wacom intous3 tablet (that I wanted to acess through hid) - Behringer BCF2000 What is your experience, what's out there that looks interesting these days? Thanks, JoÃ£o

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hox to use sys_close ?
by Roch Jub 26 May '13

26 May '13

Hello list, I'm working on a small project wich is almost finished, I try to make it the less cpu expensive possible because it runs on a shitty computer wich was made for this project, it's a homemade one piece computer&sceen, made with lcd display and desktop computer and a homemade woodboxe, this would be the 2nd or 3rd version of this "project", this is an old one with many tv s http://vimeo.com/51389641 1 / the idea is to record 20 frames from webcam everytime somebody click a button, 2 / save them as a sequence of 20 frames on disk, 3 / then display randomly each sequence looping for let say 4 seconds So what I do in record mode is feed a pix_buffer write with a pix_video, the with the pix_buffer write feed a pix_write wich record something like seqxxx_$1.jpg ($1, from 0 to 19) this solutions after different test with other , came out as the best one for a correct framerate and in random display mode I feed avery 4 seconds the pix_buffer directly with a looping $1 from 0 to 19 message "file seqxxx_$1.jpg $1". I hope you get ! So my problem would be that I use a pix_buffer for all my actions almost, and that it open files and don't close connections, in 0.42 I found that it's a known problem, and I read that 0.43 had this sys_close() ability, so I switched to 0.43 but I don't know use this function, how can I close all opened files ? thanks you !

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How to map moving points in 3D space (x, y, z) to quad panning?
by Julian Brooks 25 May '13

25 May '13

Hi all, So yeah - that (the subject). I would like to map some 3D moving sources (from Pmpd) in quad. I had been hoping to make use of Lorenzo's [panner_1x4~], from here https://gitorious.org/pd-panner-4ch but I just can't wrap my head around the maths involved. Anyone have any experience with this, or alternate strategies - the leanest possible please as it's on the RPi. Speakers are in a square/diamond and very close together - 25cm or so. It doesn't have to be very accurate and I would just like to have the impression that the five pmpd generated sound sources are moving around but my attempts so far sound cack. Also presuming that as we're not doing ambisonic type malarkey that the y-axis is pretty much redundant but, well, dunno? Had a dig around here and hurleur but nothing obvious jumped out at me. Tips, tricks, pointers or tutorials most gladly accepted All the best, Julian

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Pd-list May 2013