86 lines
1.7 KiB
Racket
86 lines
1.7 KiB
Racket
#lang scribble/manual
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@(require (for-label racket))
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@title{Pfset}
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Insert an environment into the event prototype before evaluating the supplied pattern@section{related}
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Classes/Pset
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@section{categories}
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Streams-Patterns-Events>Patterns>Data Sharing
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@section{description}
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Good for setting default values or loading server objects.
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@section{classmethods}
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@section{method}
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new
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@section{argument}
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func
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Use environment variable syntax (e.g.,
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@racketblock[ ~x = 0 ::) to store values in the internal environment. These values are copied into the event prototype before running the supplied pattern.
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]
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@section{argument}
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pattern
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An event pattern (such as link::Classes/Pbind::).
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@section{argument}
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cleanupFunc
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Optional. A function to evaluate when the pattern is stopped, or when the supplied pattern runs out of values. For example, if you loaded a link::Classes/Buffer:: in the initializer function, you could free it in the
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@racketblock[cleanupFunc::.
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]
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@section{examples}
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@racketblock[
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(
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var a, b;
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a = Pfset({
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~legato = 0.3;
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~detune = rrand(0, 30);
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}, Pbind(\dur, 0.5));
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x = a.asStream;
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9.do({ x.next(Event.new).postln; });
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)
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::
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Pfset does not override values placed into the event by the inner pattern:
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]
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@racketblock[
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(
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var a, b;
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a = Pfset({
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~dur = 0.3;
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}, Pbind(\dur, 0.5));
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x = a.asStream;
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9.do({ x.next(Event.new).postln; });
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)
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::
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Sound example
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]
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@racketblock[
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(
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SynthDef(\sinegrain,
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{ arg out = 0, freq = 440, sustain = 0.02;
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var env;
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env = EnvGen.kr(Env.perc(0.001, sustain), 1, doneAction: Done.freeSelf);
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Out.ar(out, SinOsc.ar(freq, 0, env * 0.1))
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}).add;
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)
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(
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a = Pbind(\dur, 0.5, \instrument, \sinegrain, \x, Pfunc { rrand(500, 600) });
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a = Pfset({ ~freq = { ~x.postln * 2 }; ~legato = 3; }, a);
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a.play;
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)
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::
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]
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