| list |
The items to be walked over. |
| stepPattern |
Returns integers that will be used to increment the index into list. |
| directionPattern |
Used to determine the behavior at boundaries. When the index crosses a boundary, the next direction is drawn from this stream: 1 means use stepPattern as is, -1 means go in the reverse direction. Common patterns:
|
| startPos |
Where to start in the list. |
(a = Pwalk( Array.series(20, 0, 1), // integers, 0-19 // steps up to 2 in either direction, weighted toward positive Pwrand([-2, -1, 0, 1, 2], [0.05, 0.1, 0.15, 1, 0.1].normalizeSum, inf), // reverse direction at boundaries Pseq([1, -1], inf), 10); // start in the middlex = a.asStream;)200.do({ x.next.post; ", ".post });b = a.copy.directionPattern_(1); // this one will always wrap aroundx = b.asStream;200.do({ x.next.post; ", ".post });// non-random walk: easy way to do up-and-down arpeggiations.boot;(a = Pwalk( [60, 64, 67, 72, 76, 79, 84].midicps, // C major Pseq([1], inf), Pseq([1, -1], inf), // turn around at either end 0);x = a.asStream;SynthDef(\help_walk, { |out, freq| Out.ar(out, Saw.ar([freq, freq+1], 0.5) * EnvGen.kr(Env.perc(0.01, 0.1), doneAction: Done.freeSelf))}).add;)(r = Task({ { Synth.new(\help_walk, [\freq, x.next]); 0.1.wait; }.loop;}).play(SystemClock);)r.stop;