softSet, softVol_ set a proxy param value or vol conditionally



NodeProxy.softSet, Ndef.softSet 

sets a nodeproxy param value only  in two conditions: 

* if the new value is close enough to the current param value;

*or  if the setting controller knows the previous value and sends it 

along. the idea here is that if the controller knows it did the last 

value change, it has authority to jump now.


Typical uses would be switching to a preset, then using a faderbox, 

and avoiding sudden controller jumps that could occur (soft takeover).



Ndef(\test, { |freq=200| SinOsc.ar(freq * [0.99, 1.01])  });

Ndef(\test).play(vol: 0.1);


NodeProxyEditor(Ndef(\test), 4);


Ndef(\test).set(\freq, 300);


// 3 midi steps == 0.02362;

Ndef(\test).softSet(\freq, 320, 0.03, mapped: true); // ok

Ndef(\test).softSet(\freq, 280, 0.03, mapped: true); // ok

Ndef(\test).softSet(\freq, 200, 0.03, mapped: true); // returns false if too big jump


Ndef(\test).set(\freq, \freq.asSpec.map(0.5)); 


// use unmapped set, i.e. normalized set values 

Ndef(\test).softSet(\freq, 0.5299, 0.03); // ok

Ndef(\test).softSet(\freq, 0.45, 0.03); // no, too big

// softSet can be risky - one can lose a parameter when moving a controller

// too quickly. So, if we know the last value (e.g. because I set it), 

// it is OK to jump:

Ndef(\test).softSet(\freq, 0.45, 0.03, lastVal: 0.53); // 



// example of softSet, softSet which knows lastVal,

// softVol_ and softVol_ which knows lastVol:

(

w = Window("softSet, softVol", Rect(500, 200, 360, 240)).front;

w.view.addFlowLayout;

NodeProxyEditor(Ndef(\test), 2, win: w);


// can lose control if wiggled too fast

EZSlider(w, 340@30, \softSet, nil, { |sl| 

Ndef(\test).softSet(\freq, sl.value, 0.05)

});

// knows it was in control

EZSlider(w, 340@30, \knowsLast, nil, Routine { |sl| 

var newVal, lastVal; 

loop { 

newVal = sl.value;

Ndef(\test).softSet(\freq, newVal, 0.05, lastVal: lastVal);

lastVal = newVal;

\dummy.yield;

}

});


// same for volume - not too safe

EZSlider(w, 340@30, \softVol, \amp, { |sl| 

Ndef(\test).softVol_(sl.value, 0.05)

});

// safer

EZSlider(w, 340@30, \knowLastV, \amp, Routine { |sl| 

var newVal, lastVal; 

loop { 

newVal = sl.value;

Ndef(\test).softVol_(sl.value, 0.05, lastVal: lastVal);

lastVal = newVal;

\dummy.yield;

}

});

)



// Maybe rewrite as SoftSet(what, key, val, within, mapped, oldVal); // ?