Isidro Gonzalez wrote:

Say we are programming an external and we have a user-defined struct like:

typedef struct { float dist[8]; float ang[8]; float gain[8]; }loudspeakers;

Is there a way to output and receive a pointer to this struct from and to oulets and inlets of pd objects and so communicate the data between them?

One way would be to convert a text representation of the pointer into a symbol and send that: char buf[9]; /*each byte of the pointer will be printed as two hex characters*/ loudspeakers *pointer_to_loudspeakers; t_symbol a_symbol;

sprintf(buf, "%p", pointer_to_loudspeakers); a_symbol = gensym(buf);

Then send a_symbol to other objects.

A symbol method in the receiver would convert the symbol name back into a pointer with: sscanf(s->s_name, "%p", &(void*)pointer_to_loudspeakers);

Another way, that uses no c, would be to load the 24 floats into a table and access it by name using [tabread loudspeakers] and [tabwrite loudspeakers].

Martin