Hi,

On Thu, Nov 25, 2010 at 03:28:01AM +0100, András Murányi wrote:
> Cool, i was wandering around in the rj lib but i couldn't find how this thing
> works.  Can you just tell me in a nutshell please?

yeah, it's a bit convoluted, to make it play nice in the background without a
user ever having to see a single sssad object ...

Anyway the real interesting feature you will like is not so much the "saveonly"
message but local saving which is enabled by adding something like "$0" as
second argument to your [sssad] objects. Such local sssad objects cannot be controlled
via sending to "SSSAD_ADMIN" anymore! Instead you have to send to "$0-SSSAD_ADMIN".

In rj, the [u_sssad] objects are copies of sssad.pd and they are hidden
in [u_dispatch] objects. These objects are in almost every rj abstraction and
handle two things: Dispatching of "tagged messages" from an inlet to local
receivers and saving the sssad-parameters.

For example a [u_dispatch $0 freq] will turn messages like "freq 440" into a
"440" sent to [s $0-freq] and it will also save "440" into a local(!)
sssad-parameter called "freq" that is local to the value of $0.

Now a second utility abstraction, [u_loader] will build a bridge between these
local sssads with their $0-SSSAD_ADMIN receivers and two global receivers
called RJ_SCENE_LOAD and RJ_SCENE_SAVE. Actually these are seldomly used in
rjdj scenes.

A typical idiom to get the state of all sssads in one abstraction is to send
"save" to the $0-SSSAD_ADMIN in ony abstraction, then collect all the responses
into messages and save these into message boxes.  This is handled inside of
[u_loader] and can be seen all over the rj library, expecially in Andy's synths
like s_ejun or s_cwc.

If this sounds too complicated and you want to just have a presettable
abstraction, you just need to do this:

1) add a [u_loader abstractionname-$1 $0] object
2) add a [u_dispatch $0 parametername] object for every parameter
3) daisychain all [u_dispatch] with connections and connect the first one to an inlet.
3.1) Optionally: Connect [u_loader]'s outlet to an outlet and route incoming
  "save" messages to its inlet to save settings in the parent patch, e.g. with [u_cocollect]
4) Call you abstractions with unique tags as first argument

Now try sending stuff to RJ_SCENE_SAVE and RJ_SCENE_LOAD and to the inlets of
your abstractions.

Ciao
--
 Frank Barknecht            Do You RjDj.me?          _ ______footils.org__