[PD-dev] Scheduling to activate control objects
zmoelnig at iem.at
Tue Dec 22 16:19:34 CET 2009
> I am working on a control rate object which outputs a value, only when a
> variable local to each instance is modified by another thread.
> Having not known how to achieve this, the object works fine, but only
> with a [metro] connected to it, polling for a variable change on each bang.
> I've looked into [metro] and [netreceive] which also output values
> without an external factor (inlet wise), but I kind of got lost in the code.
> Is there a simple way of achieving such an effect (i.e. by registering a
> callback), or does this require a reasonable understanding of the time
> scheduling mechanism inside Pd?
have a look at the "clock" functionality.
a clock is basically a scheduled callback.
if you want it to happen repeatedly (like metro), you have to reschedule
the clock within the callback.
apart from that: why don't you just use [metro]? thus nobody has to
learn how to start/stop the polling and to set the polling interval;
instead they can just use an object which they already know (and if not
will find that they should already know :-))
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