84 lines
1.1 KiB
Text
84 lines
1.1 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{WrapIndex}
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Index into a table with a signal.@section{related}
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Classes/Index, Classes/Shaper
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@section{categories}
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UGens>Buffer
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@section{description}
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The input signal value is truncated to an integer value and used as an
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index into the table. Out-of-range index values are wrapped cyclically to
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the valid range.
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@section{classmethods}
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@section{method}
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ar, kr
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@section{argument}
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bufnum
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Index of the buffer.
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@section{argument}
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in
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The input signal.
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@section{argument}
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mul
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Output will be multiplied by this value.
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@section{argument}
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add
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This value will be added to the output.
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@section{Examples}
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@racketblock[
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(
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// indexing into a table
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s = Server.local;
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t = [ 200, 300, 400, 500, 600, 800 ];
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b = Buffer(s,t.size,1);
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// alloc and set the values
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s.listSendMsg( b.allocMsg( b.setnMsg(0, t) ).postln );
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SynthDef("help-Index",{ arg out=0,i_bufnum=0;
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Out.ar(0,
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SinOsc.ar(
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WrapIndex.kr(
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i_bufnum,
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MouseX.kr(0, t.size * 3)
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),
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0,
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0.5
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)
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)
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}).play(s,[\i_bufnum,b.bufnum]);
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)
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::
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]
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