Hello Jean,

You can solve your problem by declaring an empty variable (Osc is the superclass of both SinOsc and TriOsc):

fun void playForPixels(int totalpixels, string osc) {

    Osc @ sh;

    if ( osc == "sin" ) { new SinOsc @=> sh; }

    else {

        if ( osc == "tri" ) { new TriOsc @=>  sh; }

        else { new SawOsc @=> sh; }

    }

    440 => osc.freq; // Still allows you to control frequency...

Best,

Casper

On Oct 5, 2015, at 04:19, Jean Menezes da Rocha <jean@menezesdarocha.info> wrote:

Hello, guys,

I am trying to choose which UGen to load (SinOsc, TriOsc or SawOsc) based on a given condition. This sample code

    fun void playForPixels(int totalpixels, string osc) {

        if ( osc == "sin" ) { SinOsc sh; }

        else {

            if ( osc == "tri" ) { TriOsc sh; }

            else { SawOsc sh; }

        }

        Envelope e => Gain g => dac;

        ( ( s + v) * 100 )::ms => dur dura;

        s * v => g.gain;

        ( dura / 40 ) / second => e.time;

        h * 2000 => sh.freq;

        sh => e;

(code goes on...)

gives me the following error:

[listener.ck]:line(38): undefined variable/member 'sh' in class/namespace 'Pixel'...

[listener.ck]: ...in function 'playForPixels'

(i am working inside a class named 'Pixel', in case it is important).

How can I load my UGen and make it persist outside the scope of the if clause?

Thanks in advance!

--

Jean Menezes da Rocha
Compositor
Professor -- Faculdades Est
Mestre e Doutorando em Composição pela Universidade Federal da Bahia

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