66 lines
1.1 KiB
Racket
66 lines
1.1 KiB
Racket
#lang scribble/manual
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@(require (for-label racket))
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@title{CuspN}
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Cusp map chaotic generator@section{categories}
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UGens>Generators>Chaotic
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@section{related}
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Classes/CuspL
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@section{description}
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A non-interpolating sound generator based on the difference equation:
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teletype::
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x(n+1) = a - b * sqrt(|x(n)|)
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::
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sclang code translation:
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@racketblock[
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(
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var a = 1.0, b = 1.9, xi = 0, size = 64;
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plot(size.collect { xi = a - (b * sqrt(abs(xi))) });
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)
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::
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]
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@section{classmethods}
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@section{method}
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ar
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@section{argument}
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freq
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Iteration frequency in Hertz
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@section{argument}
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a
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Equation variable
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@section{argument}
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b
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Equation variable
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@section{argument}
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xi
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Initial value of x
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@section{argument}
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mul
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@section{argument}
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add
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@section{examples}
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@racketblock[
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// vary frequency
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{ CuspN.ar(MouseX.kr(20, SampleRate.ir), 1.0, 1.99) * 0.3 }.play(s);
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// mouse-controlled params
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{ CuspN.ar(SampleRate.ir/4, MouseX.kr(0.9,1.1,1), MouseY.kr(1.8,2,1)) * 0.3 }.play(s);
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// as a frequency control
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{ SinOsc.ar(CuspN.ar(40, MouseX.kr(0.9,1.1,1), MouseY.kr(1.8,2,1))*800+900)*0.4 }.play(s);
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::
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]
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