[PD] preset system for complex gem patches

Frank Barknecht fbar at footils.org
Thu Feb 5 20:32:35 CET 2009

punchik punchik hat gesagt: // punchik punchik wrote:

> Hi, ive been working on a complex gem patch for creating 3d
> structures, the patch has a lot of parameters for changing translation
> , rotation, scale, color, etc. I want to make a preset system for
> saving the states of interesting shapes and then load them, Do anybody
> have tried something like this?
> which is the best approach for saving a lot of parameters- variables?
> say 200 or more?
> Do you think coll is a good idea for this? or is there a better way
> for doing this?

Generally with preset saving you face two problems:

a) collecting and distributing all the parameters to and from a central
b) storing them somehow - this is also called "persistence".

[coll] only deals with b) and as Hans wrote, there are other storage
solutions like [pool] or the sqlite external or pbank etc. There also
are useful builtin storage objects: [table], [textfile], message
boxes or data structures.

You still will have to deal with a) which is the harder problem IMO.
[sssad] was designed to solve a) in a standard way and to work with any
solution to b) that you want to use, including storing into [textfile]
and message boxes.

So, I would recommend [sssad] to solve a). Just "decorate" everything
that you want to save with a cross-connected and uniquely named
[sssad]-object, then build your persistence system for example as
suggested in the help-file for sssad using [textfile]. You can group
parameters like the three numbers for RGB values into lists with sssad
as well, if you like.

If you want to see an advanced way of using [sssad] to manage parameters
of abstractions in action, you maybe want to check the RjDj library in
development here:  http://trac.rjdj.me/wiki/RjLibnew

An example with lots of parameters is the [s_fm4] synthesizer, which is
a 4-operator FM synth with 40 parameters. The help patch shows how these
are saved into a message box, internally you see the [u_dispatch]
objects that are used to manage the parameters with [sssad].


More information about the Pd-list mailing list