100 lines
1.6 KiB
Text
100 lines
1.6 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Fdef}
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lazy function proxy@section{categories}
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Libraries>JITLib>Patterns, Live Coding
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@section{related}
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Classes/Pdef, Classes/Tdef, Classes/Pdefn, Classes/Ndef
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@section{description}
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Placeholder for functions to calculate with.
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See also: link::Classes/Maybe:: and the link::Overviews/JITLib:: overview.
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@section{ClassMethods}
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@section{private}
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initClass
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@section{method}
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new
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@section{argument}
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key
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if no instance exists with this name, create a new one, otherwise return the existing one.
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@section{argument}
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val
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If a link::Classes/Function:: is given, replace the old function with the new one.
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@section{Examples}
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@racketblock[
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Fdef(\x, { 8 + 9 });
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Fdef(\y, Fdef(\x) - 3);
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Fdef(\y).value;
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Fdef(\x, 3);
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Fdef(\y).value;
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Fdef(\x, { |x=0| x });
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Fdef(\x).value(8);
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Fdef(\y).value(8);
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z = Fdef(\x) * Fdef(\y) + { 1.0.rand };
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z.value;
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z.value(400);
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::
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]
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@racketblock[
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// sound example
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(
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s.boot;
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SynthDef("gpdef",
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{ arg out=0, freq=440, sustain=0.05, amp=0.1;
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var env;
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env = EnvGen.kr(Env.perc(0.01, sustain), doneAction: Done.freeSelf) * amp;
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Out.ar(out, SinOsc.ar(freq, 0, env))
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}).add;
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)
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// fork a thread that plays some sounds
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(
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Fdef(\freq, 440);
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Fdef(\dur, 0.2);
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fork {
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loop {
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s.sendMsg("/s_new", "gpdef", -1, 1,1, \freq, Fdef(\freq).value);
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Fdef(\dur).value.wait;
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}
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};
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)
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// some modifications
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Fdef(\freq, Fdef(\midinote, 60).midicps);
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Fdef(\midinote, { [67, 64, 65].choose });
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Fdef(\midinote, { [67, 64, 65].choose } + Fdef(\offset));
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Fdef(\offset, { 4.rand });
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Fdef(\dur, 0.23);
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::
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]
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