--- On Sat, 7/9/11, Ivica Ico Bukvic <[email protected]> wrote:
> From: Ivica Ico Bukvic <[email protected]> > Subject: RE: [PD] route - pack issue > To: "Jonathan Wilkes" <[email protected]> > Cc: [email protected] > Date: Saturday, July 9, 2011, 10:33 AM > > > Jonathan Wilkes <[email protected]> > wrote: > > > > > > >--- On Fri, 7/8/11, Ivica Ico Bukvic <[email protected]> wrote: > > > >> From: Ivica Ico Bukvic <[email protected]> > >> Subject: RE: [PD] route - pack issue > >> To: "Jonathan Wilkes" <[email protected]> > >> Cc: [email protected] > >> Date: Friday, July 8, 2011, 8:12 PM > >> > >> > >> Jonathan Wilkes <[email protected]> > >> wrote: > >> > >> > > >> > > >> >--- On Fri, 7/8/11, Ivica Ico Bukvic <[email protected]> wrote: > >> > > >> >> From: Ivica Ico Bukvic <[email protected]> > >> >> Subject: RE: [PD] route - pack issue > >> >> To: "'Jonathan Wilkes'" <[email protected]> > >> >> Cc: [email protected] > >> >> Date: Friday, July 8, 2011, 4:54 PM > >> >> > static void pack_list(t_pack *x, > >> >> t_symbol *s, int ac, t_atom *av) > >> >> > { > >> >> > if (ac==0) > >> >> > pack_bang(x); > >> >> > else > >> >> > > >> >> obj_list(&x->x_obj, 0, ac, > av); > >> >> > } > >> >> > >> >> > >> >> Many thanks for this contribution! I will > add this > >> to > >> >> pd-l2ork. However, shouldn't also route > output > >> bang when > >> >> having an empty list? > >> > > >> >[route] already does this. > >> > >> But I thought OP suggested [route start] -> > [pack] did > >> not work since pack received empty list instead of > bang and > >> did not know what to do with it. > > > >Well, [route] isn't the only one that can output an > empty list-- the > >[list] family objects, [trigger], and probably others > do, too. > > > >Anyway, I think there are only some special cases where > this gets > >tricky: when an object class defines both a bang method > and a list > >method like [pack] does, or with an object like [route] > which just has > >a list method as a catchall in which "bang", "float", > and "symbol" > >messages are parsed manually. > > > >Otherwise, Pd does some automagic message conversion > (defined in > >m_class.c) so that, for example, if [foo] only has a > "bang" method and > >no list method, it will just call the "bang" method > when an empty list > >is received at its inlet. So one needn't worry > whether or not an > >object outputs an empty list, just if the special case > objects like > >[pack] and [route] handle them correctly. What I mean is that you only need to insure that the special case objects handle messages at their inlet correctly. And in this case, I think [route] already does the correct thing. > > So, are you suggesting therefore that route needs to be > fixed as well or just pack? Just [pack]. > > > > >-Jonathan > > > >> > >> > > >> >> > >> >> Best wishes, > >> >> > >> >> Ico > >> >> > >> >> > >> > >> > >> Ivica Ico Bukvic, D.M.A > >> Composition, Music Technology > >> Director, DISIS Interactive Sound & Intermedia > Studio > >> Director, L2Ork LinuxLaptop Orchestra > >> Assistant Co-Director, CCTAD > >> CHCI, CS, and Art (by courtesy) > >> Virginia Tech > >> Department of Music > >> Blacksburg, VA 24061-0240 > >> (540) 231-6139 > >> (540) 231-5034 (fax) > >> disis.music.vt.edu > >> l2ork.music.vt.edu > >> ico.bukvic.net > >> > > > Ivica Ico Bukvic, D.M.A > Composition, Music Technology > Director, DISIS Interactive Sound & Intermedia Studio > Director, L2Ork LinuxLaptop Orchestra > Assistant Co-Director, CCTAD > CHCI, CS, and Art (by courtesy) > Virginia Tech > Department of Music > Blacksburg, VA 24061-0240 > (540) 231-6139 > (540) 231-5034 (fax) > disis.music.vt.edu > l2ork.music.vt.edu > ico.bukvic.net > _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
