Hi,

 

> if it is possible to write externals that generate structs/templates?

 

Yes, actually Pd itself does this for the private templates needed by [array] and [text], have a look at garray_init() in g_array.c or text_template_init() in x_text.c.

 

The patch is just a C string which you put into a binbuf which gets evaluated with pd_canvasmaker as the target.

 

You can also create patches programmatically:

 

1) create the canvas: https://git.iem.at/pd/vstplugin/blob/develop/pd/src/vstplugin~.cpp#L521

 

2) fill it with stuff: https://git.iem.at/pd/vstplugin/blob/develop/pd/src/vstplugin~.cpp#L649

 

Christof