Re: [Pythonsound-devel] Re: Python and music [was Re: New work, new tools] (fwd)

[Maurizio U. P. <um...@ti...>]

On Wed, 3 Oct 2001, Paul Winkler wrote:

> On Wed, Oct 03, 2001 at 03:52:40PM +0200, Maurizio Umberto Puxeddu wrote:
> > On Mon, 1 Oct 2001, Paul Winkler wrote:
> I'd still like to discuss whether objects should be responsible for
> their own start time, or delegate that to a parent Aggregate.  When
> you get a chance, I'd like to hear your reasoning for making each
> event responsible for its own start time.
>
> The only argument I can see *against* giving this responsibility to
> the parent (the containing Aggregate) is that it requires you to have
> a top-level Aggregate to control your composition's overall
> structure. This might be seen as inconvenient; "I know when this
> object should start, I want to say so when I create the object."

This is not a problem, with me at least.
The problem is an that you can't perform onset-related operations
on an object without interacting with its container (as a trivial
example, translation).
At the moment, in OMDE you can put an object in a container and
still intermixing direct operations on the object and operations on the
container as a whole, that is:

e = Event()

a = Aggregate(e, f, g , h ,i)

a.strech()
e.translate_relative(-5)

How do you perform a translation of an object in your way?

a.translate_object_relative(a, -5)

Doesn't works, because, as you said, you want to have several copies of
the same event.
You have to do something like

a.translate_object_relative(123, -5)

where 123 is probably the index of the object in the list of tuples
(onset, object) like

a.list

This is good for a GUI, where you click on the windows, calculate the
coordinate of an event, find it on the list and keep its index.
Not so good with a script.

You should have to tag one to one each event...

> As further purely anecdotal evidence, I'll note that the author of
> Blue does it my way. :)

In fact Blue its GUI driven!
Are you in contact with him or did you read the sources of Blue?

I always thought of Blue as the obvious user interface for OMDE/pmask.

Maurizio Umberto Puxeddu.