Pd-dev September 2002

pd-dev@lists.iem.at

27 participants
37 discussions

Re: [PD] Re: [PD-dev] pd.tk [fonts]
by Andre Schmidt 05 Sep '02

05 Sep '02

----- Original Message ----- From: "Thomas Grill" <t.grill(a)gmx.net> To: "pd" <pd-list(a)iem.kug.ac.at> Sent: Thursday, September 05, 2002 8:43 PM Subject: Re: [PD] Re: [PD-dev] pd.tk [fonts] > Hi Andre, Thomas and all, > > i'm totally new to PD GUI programming, but it seems as if there's normally > only one default font usable for an external. > - Is there some way to switch to other fonts? only by editing pd.tk file (atleast @ the moment) > - Is tcl/tk capable of handling scalable (true-type) fonts that are > available on practically every system? yes cheers -andre > > many thanks, > Thomas > > > > _______________________________________________ > PD-list mailing list > PD-list(a)iem.kug.ac.at > http://iem.kug.ac.at/cgi-bin/mailman/listinfo/pd-list

1 0

pd.tk [fonts]
by Andre Schmidt 04 Sep '02

04 Sep '02

hi devs, i couldnt let my fingers from it :) so i'm working on the fonts again.. but i got a problem. can i use a specific font for a specific size ? ex. i wanted to use my font (pufo) only for size 7.. i found this on pd.tk but it doesn't seem to work so like i wanted/thought... (sorry i'm working @ TAE style)[TAE = trial and error] ############ pdtk_text_new -- create a new text object #2########### proc pdtk_text_new {canvasname myname x y text font color} { if {$font < 8} {set fontname [format -*-pufo-----%d-* $font]} if {$font >= 8} {set fontname [format -*-courier-----%d-* $font]} $canvasname create text $x $y \ -font [format -*-courier-bold--normal--%d-* $font] \ -tags $myname -text $text -fill $color -anchor nw # pd [concat $myname size [$canvasname bbox $myname] \;] } as i read it with my very limited coding skills it would be if size smaller than 8 use my font, right?! well, the if(s) where marked unused so could be that they are not compatible with the rest of the code... but if this feature (specific fonts for specific sizes) is not supported in the code it's not a must. i just wanted it for my test... cheers -andre

2 2

Re: writing externals (J. Scott Hildebrand....)
by IOhannes zmoelnig 04 Sep '02

04 Sep '02

hi ! J. Scott Hildebrand wrote: > i don't really understand how my loop creates that weird result. i > guess i just don't really get the relationship between n, in1/in2, and my > arrays. <...> > > i was told by some other PD people that the pd blocksize is > hardcoded to 64 samples and that my problem before was trying to send 256 > samples at once to the soundcard. the solution that has been recommended > is to place my patch as an abstraction, because the inlet/outlet will take > my 256 samples and break it up into blocks pd can work with (64 samples). do not mix things up: pd handles audio-data in blocks, which may have any size that is a power of 2. the blocksize can be controlled by the [block~] object (we had this before), and defaults to 64 samples. only the "dac-blocksize" is hardcoded to 64 samples. This means, that you cannot have a [block~ 256] AND a [dac~] (or [adc~]) object in the same patch -- but you *can* have the [dac~] object in the "main"-patch (with a default blocksize of 64) and the [block~ 256] in a subpatch (or abstraction) inside the "main patch". How the different blocks go together should be of any concern to you, since it is managed by the [inlet~]/[outlet~] routines. If you are using an overlap of 1 (eg.: no overlap), then the stream of samples will be continously, eg: it doesn't make a difference when you look at the signal with pe a [scope~] object. if there is an overlap defined, this is not true any longer, since the overlapping part of the signal will appear in subsequent blocks. now what is "n" (which is sp[0]->s_n) ? n is the blocksize. so normally "n" will just be 64, however if you have used [block~ 256] in an abstraction, "n" will be 256 for all of the signal-objects inside this abstraction (and all sublevels except those overriden by another [block~]) now what is "in1" (resp. "in2") (which is sp[0]->s_vec) ? "in1" is a pointer to an array of "n" (see above") samples. so you will get the current block of the audio-signal only with both "n" and "in1" confusion: "in1" might point to the same memory-area as "out1", so be careful when writing things to the out-buffer ("out1") before having read the in-buffer ("in1") if you want to process the in-buffer somehow, for the data might be overwritten/lost >>here starts the trouble >> >> >>> for(readpos=0; readpos<64; readpos++) you should never hardcode the blocksize 64 into your external, since it just might be wrong ! > > > i have looked at a few externals but i couldn't find any useful > information. i'm trying to basically work on the DSP stuff right now but i > have a barely working convolver in my code right now. everything has been > uber simplified so if you could take a look it wouldn't take you more than > a minute or two. and if you have any external or a piece of code that i > might be able to learn something from, please send it my way! thanks! please DO NOT start with a convolver ! please DO start with the pd-externals-HOWTO @ http://pd.iem.at/externals-HOWTO/ do not use variables declared "static" as long as they are not absolutely necessary (in most cases they are not) do start with the simplest possible external (reading from input, writing to output), and make it work then gradually increase the complexity (buffering; stereo; etc) of the external and check and double-check whether it still works (and if not, try to find the error. you can use debugging output to the console!) in *your* special case, read about OLA (overlap-and-add) and block-filtering-techniques, and see that pd is ideal for this kind of things. mfg.cds.adr IOhannes PS: damned: can you tell me, which values your variable "apple" will have between starting the audio-engine and the segfault ?

1 0

pd externals cvs hairiness
by Bryan Jurish 04 Sep '02

04 Sep '02

good morning all, I've just been trying to import an external into the pd externals cvs at sourceforge, by doing the following: export CVS_RSH=/usr/local/bin/ssh export CVSROOT=:ext:mukau@cvs.pure-data.sourceforge.net:/cvsroot/pure-data cvs -z3 import externals/forward mukau initial ... which gives me the following error message, after I type my (correct) sourceforge password: cvs import: warning: unrecognized response `' from cvs server cvs import: warning: unrecognized response `Welcome to cvs.sourceforge.net' from cvs server cvs import: warning: unrecognized response `' from cvs server cvs import: warning: unrecognized response `This is a restricted Shell Account' from cvs server cvs import: warning: unrecognized response `You cannot execute anything here.' from cvs server cvs import: warning: unrecognized response `' from cvs server cvs [import aborted]: end of file from server (consult above messages if any) ... I've checked the sourceforge page for tips, and I've been able to successfuly direct-ssh to 'shell.sourceforge.net', but I get immediately kicked out when I try to ssh anywhere else (i.e. 'cvs.sourceforge.net')... configuration: ssh: OpenSSH_3.4p1 cvs: v1.11 os : linux (2.4.19) I use cvs over ssh regularly, but I've never had to deal with cvs over ssh to a restricted shell before -- does anyone have any ideas? did I miss something in the docs? marmosets, Bryan

2 3

a few questions
by J. Scott Hildebrand 04 Sep '02

04 Sep '02

i'm just a little confused on a few little Pd things. 1. when the control of an external program is finished with the perform function, does the control go to the beginning of the perform function, or the very beginning of the external code? 2. just for some conceptual aid, when the while(n--) loop is executing, what "direction" is the data read into the in1[] array? and to correctly output the data in order, which is the data that is first to be outputted; the beginning or the end of the in1[] array? scott -------------------------------------------------------------------- "640K ought to be enough for anybody." -- Bill Gates, 1981 --------------------------------------------------------------------

2 1

i need some help with this
by J. Scott Hildebrand 03 Sep '02

03 Sep '02

first off i think you can forget about the first email i sent. i've included the .c code and the pd patch. all the convolution stuff is commented out so you can compile and it try this if you want. i almost have a working convolver to put in there, but i first need to make sure i can get 1 mono file go into my external, and have the two convolved signals outputted. right now something screwy is going on and i can't get the stereo signal. thanks for any help! scott -------------------------------------------------------------------- "640K ought to be enough for anybody." -- Bill Gates, 1981 --------------------------------------------------------------------

4 4

Re: [PD] questions
by Mathieu Bouchard 02 Sep '02

02 Sep '02

On Thu, 29 Aug 2002, Olaf Matthes wrote: > Mathieu Bouchard schrieb: > > another question: is it still true that a non-left inlet may only define a > > single method? is there some kind of workaround for that? > Yes and yes. You can't do it the 'normal' way, but Thomas Grill recently > showed me how to create a 'proxy inlet'. You could have a look at the sources [...] On Thu, 29 Aug 2002, Thomas Grill wrote: > Hi Mathieu, It's only a sketch, actually fragments from flext code. > good luck, Thomas > ---------------------------------------- > As stated before, you need proxy objects which (actually their method) > receive the messages for the non-left inlets. [...] Thanks to both of you. I have created proxy objects and they work. GridFlow 0.6.2 will include the Ruby<->PureData bridge I've written. However it crashes after a while due to memory corruption, which I don't have while running with the other bridge or running standalone. Also I don't know how to correctly tell to PureData that the object should be greyed out and disabled. What I do in the Ruby/C++ part is I raise an exception in the constructor. I catch that exception in the bridge and I call pd_error()... that leaves a gui object with 1 inlet and 0 outlets, invariably, and if i send a bang in that outlet, i get: error: ruby NoMethodError: undefined method `_0_bang' for false where 'false' is Ruby's interpretation of a null pointer. in jMax, calling fts_object_set_error() is sufficient to grey out an object. ________________________________________________________________ Mathieu Bouchard http://artengine.ca/matju

1 0

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Pd-dev September 2002