Depending on what you are doing I would suggest flext for most uses, the API is cleaner, has more helper functions and is easier to learn that native PD externals.

you can look at the source for "pso" which outputs complex lists and has multiple outlets. in externals/bbogart/externals (uses flext).

off hand I can't remember how to output lists in native externals, output_list?

B.

Florian Grond wrote:

Dear List,

I' ve managed to program simple objects for pd so far where inlets and outlets were only scalars. But the amount of numbers I want to send out increased and it makes no sense to have for everything an outlet:

Could anybody briefly tell me how to output a list through an outlet, say a list, containing three floats.

In particular, how to I have to change these lines?

x->list_out = outlet_new(&x->x_obj, &s_???????????????);

outlet_???????(x->list_out, x->???????????);

A quick reply would be very appreciated,

Thanks,

Florian

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On Fri, 8 Apr 2005, Florian Grond wrote:

I' ve managed to program simple objects for pd so far where inlets and outlets were only scalars. But the amount of numbers I want to send out increased and it makes no sense to have for everything an outlet: Could anybody briefly tell me how to output a list through an outlet, say a list, containing three floats. In particular, how to I have to change these lines? x->list_out = outlet_new(&x->x_obj, &s_???????????????); outlet_???????(x->list_out, x->???????????); A quick reply would be very appreciated,

from include/m_pd.h:

EXTERN void outlet_list(t_outlet *x, t_symbol *s, int argc, t_atom *argv); EXTERN void outlet_anything(t_outlet *x, t_symbol *s, int argc, t_atom *argv);

So that to do like a msgbox containing "2 3 5 7" you could do:

t_atom t[4]; SETFLOAT(t[0],2); SETFLOAT(t[1],3); SETFLOAT(t[2],5); SETFLOAT(t[3],7); outlet_anything(my_outlet,gensym("list"),sizeof(t)/sizeof(t_atom),t);

but i don't know why outlet_list has a t_symbol *s argument, and i never used it. (I also am using a wrapper, and mine only ever uses outlet_anything)

PS: I just had a look at the source code of Pd and it seems that the s of outlet_list is just ignored, that is, just assumed to be gensym("list"). that's somewhat confusing, but for compatibility, the s argument can't be removed.

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