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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | class:: Pconst
summary:: constrain the sum of a value pattern
related:: Classes/Pfindur, Classes/Pfin, Classes/Pfinval
categories:: Streams-Patterns-Events>Patterns>Repetition
description::
Similar to link::Classes/Pfindur::, but works with the value directly.
note::
Be careful if this is used, directly or indirectly, for a note-length parameter! The difference may be very small and this could result in zombie nodes, due to a bug in link::Classes/EnvGen:: for very short sustain times.
::
ClassMethods::
method::new
Embeds elements of the strong::pattern:: into the stream until the sum comes close enough to strong::sum::. At that point, the difference between the specified sum and the actual running sum is embedded.
Examples::
code::
(
var a, x;
a = Pconst(5, Prand([1, 2, 0.5, 0.1], inf));
x = a.asStream;
9.do({ x.next(Event.default).postln; });
)
//Pconst used as a sequence of pitches
(
SynthDef(\help_sinegrain,
{ arg out=0, freq=440, sustain=0.05;
var env;
env = EnvGen.kr(Env.perc(0.01, sustain, 0.2), doneAction:2);
Out.ar(out, SinOsc.ar(freq, 0, env))
}).add;
)
(
Pn(
Pbind(
\dur, Pconst(1, Prand([1, 0.02, 0.2], inf)),
\instrument, \help_sinegrain,
\degree, Pseries(0, 1, inf),
\octave, 6
)
).play;
)
::
|