Pd-list December 2004

pd-list@lists.iem.at

130 participants
218 discussions

fast times : [vline~], iem_t3_lib and [block~]
by julien.breval＠tremplin-utc.net 01 Dec '04

01 Dec '04

Hello list I'm working on a patch which consists in a complex interaction between the following processes : -> delay lines (with feedback) -> simple amplitude enveloppes -> signal mute/unmute -> asynchronous triggering timers (non-audio) These processes should work at very short times (as short as possible). I have tried lots of different techniques but I still wonder which ones are the best. These four above processes need two things : ---> (1) control-to-signal conversions with fast interpolation (and no artefact click) ---> (2) waiting for a very accurate time Moreover, the delay lines obviously need to include the [block~ 1] object for achieving very small times (see the "control.blocksize.pd" example file) so I added it. I don't know if it is really useful to add this object to the other parts of the patch. (1) When converting float messages to signals, I used [line~] before, but [vline~] looks more appropriated for fast changes. There's also [t3_line~] ; what is the difference between these objects ? Anyway I didn't manage to use [t3_line~], maybe because it uses much more CPU and I use lots of these conversions in my patch. [unpack~] from zexy looks good but you can't change its interpolation time in realtime. So what is the right solution ? I need, for example, to mute and then unmute a sound during 1 millisecond, so interpolation time should be about 0.2 or 0.3 ms I think. Maybe it's simply impossible. Also, the output signal of the enveloppes is generated by a [vline~], should I use something else ? (2) Regarding the enveloppes and the timers, I read on the pd-list-archive that [del] works until 64 samples only (about 1.5 ms). Therefore I replaced all the [del] objects [t3_delay] in the enveloppes and the timers. Indeed, [t3_delay] (from IEMlib) is supposed to go below 64 samples. Is it the right method ? Last question : where can I find some documentation about the IEM_t3_lib ? I only have the help patches. Thanks for your help, -julien

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in/out-let order in abstraction
by Federico 01 Dec '04

01 Dec '04

in which order inlets in a patch appear as abstraction connections? are they sorted by x/y position? or they are sorted by the creation order? -- Federico

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using root_window (x11)
by patrick 01 Dec '04

01 Dec '04

hi, in gem / pdp / gridflow: would it be possible for me to output visual in the root_window of x11? (like most xscreensaver with argument -root) patrick

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Re: switching to newer pd installer...
by Hans-Christoph Steiner 01 Dec '04

01 Dec '04

I am in the middle of finishing my masters thesis, due in a week, so you'll have better luck with this on the pd list. I forwarded this to the list. There is also lots of discussion about these topics in the list archives: http://puredata.org/community/lists .hc On Nov 28, 2004, at 10:59 AM, rene beekman wrote: > hans, > > i've had your PureDataInstaller_0.37-2003.10.02 installation installed > from some time now and have recently installed the new .app version > and am now wondering what and how much is left behind from the old > installation that is no longer needed. is there a way to uninstall the > old installation? i've checked the installer, but it doesn't seem to > have an 'uninstall' option... > with the appearance of the click-and-drag .app for os x, i assume more > people will be wondering about the same thing... > > i'm very glad to see an all-in-one .app appear for os x. though there > seem to be different versions; do you happen to know what the > difference is between your Pd-0.38-0test4HCS1.dmg and the file found > on miller's site "Pd version 0.38-0test10"? > is the one on miller's page simply a later test version or is there a > difference in included objects and extra libraries? > > thanks again for compiling this > best > rene > ________________________________________________________________________ ____ "Computer science is no more related to the computer than astronomy is related to the telescope." -Edsger Dykstra

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Gem wont configure, even after I modified the script
by thewade 01 Dec '04

01 Dec '04

I got the CVS version of Gem and tried to build it. Configure failed on openGL. I remembered that there was a bug in the configure script (see below). I fixed this and configure got further, but still wont find any of my extras like libdv or quicktime. Can anyone help me? Im trying to build Gem on an amd64 laptop. Thanks! -thewade >From pd email: Thu, 18 Mar 2004 My reported bug was that Gems configure script was trying to find GL by compiling conftest.c with the following command: gcc -o conftest -g -O2 -L/usr/X11R6/lib conftest.c -lGL -Wl,-shared -Wl,-export-dynamic -lXxf86vm -lXext -lX11 (as taken from configure) but my problems here seem obvious to Jacub, read below! ------- Additional Comments From jakub(a)redhat.com 2004-03-18 05:18 ------- That is to be expected. Never use -Wl,-shared, but -shared. With -Wl,-shared, you don\'t tell the gcc driver that you are trying to build a shared library, so it throws in crt objects for executable etc., but you tell the linker to create a shared library with that. With -shared, you tell the gcc driver that you are linking a shared library and it will take care of the details (putting in correct crt files, libraries etc. and of course also passing -shared to ld).

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Gem and two firewire inputs
by shree 01 Dec '04

01 Dec '04

is it possible to use 2 firewire cameras with GEM? i am on a Mac OS X Patrick Pagano, B.S., M.F.A. candidate Research And Development Assistant Digital Worlds Institute University Of Florida (352) 294-2082

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Error Loading Gem.pd_linux
by Lee Colleton 01 Dec '04

01 Dec '04

Hello, I'm using pd and gem as packaged with the Ubuntu Linux distribution Pd version 0.37.cvs1-4 Gem version 0.888 When I try to load pd with gem I get an error. This prevents me from creating the [gemwin] object, which makes me sad. Can anyone offer me advice? $ pd -lib /usr/lib/pd/extra/Gem.pd_linux couldn't open MIDI input device 0 couldn't open MIDI output device 0 opened 0 MIDI input device(s) and 0 MIDI output device(s). /usr/lib/pd/extra/Gem.pd_linux: can't load library -- Lee Colleton <lee(a)colleton.net>

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Gem - Texturing? UV Mapping? etc.
by Christian Klotz 01 Dec '04

01 Dec '04

Hi list, playing around with Gem and some obj models a few questions came to my mind. - when I started a bit texturing obj models, I asked myself how to get even a bit more complex 3d objects (think of a car or something like that) textured with gem. Did anyone already try something like this or know how to deal with it? I would really like to work with gem doing things like that ;) is there some uvmap support under development? I am asking because even a cylinder exported to obj had a completely different texture behaviour compared to a gem cylinder and I didnt get both of them textured the same way (???) - another thing. I read a post of 2002 about adding multitexturing and bump mapping - which where added to the prior to do list. have they ever been implemented? I think its quite important for people doing graphic stuff with pd - and as it seems to me by reading the mailinglists every day, there is more and more interest in using pd together with gem. I'll appreciate any suggestions. regards christian --- Christian Klotz Kunsthochschule Kassel / School of Arts Kassel ::digitalpool

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Pd-list December 2004