Help/Streams-Patterns-Events/Patterns/PlazyEnvir.html

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  28 <p class="p1"><span class="s1"><b>PlazyEnvir<span class="Apple-tab-span">       </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></b></span><b>instantiate new patterns from a function</b></p>
  29 <p class="p2"><br></p>
  30 <p class="p1"><b>superclass: Plazy</b></p>
  31 <p class="p2"><br></p>
  32 <p class="p2"><br></p>
  33 <p class="p1">Evaluates a function that returns a pattern and embeds it in a stream.</p>
  34 <p class="p1">In difference to <a href="Plazy.html"><span class="s2">Plazy</span></a>, the function is evaluated using the environment passed in by the stream</p>
  35 <p class="p2"><br></p>
  36 <p class="p2"><br></p>
  37 <p class="p1"><b>PlazyEnvir(func)</b></p>
  38 <p class="p2"><br></p>
  39 <p class="p1"><b>func:</b> A function that returns a pattern or any other valid pattern input</p>
  40 <p class="p2"><br></p>
  41 <p class="p2"><span class="Apple-converted-space"> </span></p>
  42 <p class="p3">(</p>
  43 <p class="p3">a = <span class="s2">PlazyEnvir</span>({ <span class="s2">arg</span> a=0, b=1; <span class="s2">Pshuf</span>([a, a, b], 2) }); <span class="s3">// a, b default to 0,1</span></p>
  44 <p class="p3">x = <span class="s2">Pn</span>(a, <span class="s2">inf</span>).asStream;</p>
  45 <p class="p4"><br></p>
  46 <p class="p3">10.do { x.next.postln }; <span class="s2">Post</span>.nl;</p>
  47 <p class="p3">e = (a:100);</p>
  48 <p class="p3">10.do { x.next(e).postln }; <span class="s2">Post</span>.nl;</p>
  49 <p class="p3">e = (a:100, b:200);</p>
  50 <p class="p3">10.do { x.next(e).postln };</p>
  51 <p class="p3">)</p>
  52 <p class="p2"><br></p>
  53 <p class="p2"><br></p>
  54 <p class="p1">PlazyEnvir used to produce a Pbind:</p>
  55 <p class="p2"><span class="Apple-converted-space"> </span></p>
  56 <p class="p3">(</p>
  57 <p class="p5"><span class="s2">SynthDef</span><span class="s4">(</span>\help_sinegrain<span class="s4">,<span class="Apple-converted-space"> </span></span></p>
  58 <p class="p3"><span class="Apple-tab-span">     </span>{ <span class="s2">arg</span> out=0, freq=440, sustain=0.05, pan=0;</p>
  59 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s2">var</span> env;</p>
  60 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>env = <span class="s2">EnvGen</span>.kr(<span class="s2">Env</span>.perc(0.01, sustain, 0.2), doneAction:2);</p>
  61 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s2">Out</span>.ar(out, <span class="s2">Pan2</span>.ar(<span class="s2">SinOsc</span>.ar(freq, 0, env), pan))</p>
  62 <p class="p3"><span class="Apple-tab-span">     </span>}).add;</p>
  63 <p class="p4"><br></p>
  64 <p class="p3">a = <span class="s2">PlazyEnvir</span>({ <span class="s2">arg</span> g=0, h=0, dur=1;</p>
  65 <p class="p6"><span class="s4"><span class="Apple-tab-span">    </span>postf(</span>"g: %, h: %, dur: %\n"<span class="s4">, g, h, dur);</span></p>
  66 <p class="p7"><span class="s4"><span class="Apple-tab-span">    </span></span>Pbind<span class="s4">(</span></p>
  67 <p class="p5"><span class="s4"><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span></span>\instrument<span class="s4">, </span>\help_sinegrain<span class="s4">,</span></p>
  68 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s5">\dur</span>, dur,</p>
  69 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span><span class="s5">\degree</span>, <span class="s2">Pseq</span>([g, g, h, g, h], 2)</p>
  70 <p class="p3"><span class="Apple-tab-span">     </span>)</p>
  71 <p class="p3">});</p>
  72 <p class="p4"><br></p>
  73 <p class="p3">)</p>
  74 <p class="p4"><br></p>
  75 <p class="p4"><br></p>
  76 <p class="p8">// different variants</p>
  77 <p class="p3">(a &lt;&gt; (g: 0, h: 3, dur:0.2)).play; <span class="s3">// single stream</span></p>
  78 <p class="p3">(a &lt;&gt; (g: [0, 4], h: [3, -1], dur:0.2)).play; <span class="s3">// same durations, two streams</span></p>
  79 <p class="p9"><br></p>
  80 <p class="p8">// for more about the composition operator &lt;&gt; see: Pchain</p>
  81 <p class="p4"><br></p>
  82 <p class="p4"><br></p>
  83 <p class="p1">Some parameters, like duration, cannot be used in the form of an array in the Pbind.<span class="Apple-converted-space"> </span></p>
  84 <p class="p1">For full parallel expansion see <a href="PlazyEnvirN.html"><span class="s2">PlazyEnvirN</span></a></p>
  85 <p class="p2"><br></p>
  86 <p class="p4"><br></p>
  87 <p class="p9"><br></p>
  88 <p class="p4"><br></p>
  89 <p class="p4"><br></p>
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