random float 0. - 1. how to?

[Rognvald]

How to convert "randInt" to float?
This compiles but does not seem to work..

inline function onButton1Control(component, value)
{
	  if (value)
    {
        local Knob1_value = Math.randInt(20, 20000);
        local Knob2_value = Math.randInt(0, 100 * 0.01);
        
        Knob1.setValue(Knob1_value);
        Knob2.setValue(Knob2_value);
    }
};

Content.getComponent("Button1").setControlCallback(onButton1Control);

[iamlamprey]

@Rognvald

You can use Math.random() for a random float between 0.0 and 1.0.

You also need to add

Knob1.changed();
Knob2.changed();

Afterwards if you want the affected controls to actually change anything.

[Rognvald]

@iamlamprey Thanks for your speedy reply!

i get this error.. Too many arguments in API call Math.random(). Expected: 0

inline function onButton6Control(component, value)
{
	  if (value)
    {
        local Knob1_value = Math.randInt(20, 20000);
        local Knob3_value = Math.random(0.0, 1.0)
        Knob1.setValue(Knob1_value);
        Knob1.changed();
        Knob3.setValue(Knob3_value);
        Knob3.changed();
        
        SimpleGain1.setAttribute(SimpleGain1.Gain, Knob1_value);
        SimpleGain2.setAttribute(SimpleGain2.Gain, Knob3_value);
    }
};

[iamlamprey]

@Rognvald You don't pass anything into Math.random():

Math.random(0.0, 1.0); // wrong
Math.random(); // right

[Rognvald]

@iamlamprey yes I got it thanks again for your time :) Still learning and enjoying HISE.

This is working for me*

inline function onButton6Control(component, value)
{
	  if (value)
    {
        local Knob1_value = Math.randInt(20, 20000);
        local Knob3_value = Math.range(Math.random(), 0.0, 1.0);
        Knob1.setValue(Knob1_value);
        Knob1.changed();
        Knob3.setValue(Knob3_value);
        Knob3.changed();
        
        SimpleGain1.setAttribute(SimpleGain1.Gain, Knob1_value);
        SimpleGain2.setAttribute(SimpleGain2.Gain, Knob3_value);
    }
};

Content.getComponent("Button6").setControlCallback(onButton6Control);

[iamlamprey]

@Rognvald No problem

This is a bit cleaner:

inline function onButton6Control(component, value)
{
	if (!value) { return; } // works the same as if (value) but the scope is a little bit cleaner

    local Knob1_value = Math.randInt(20, 20000); // this is already fine
    local Knob3_value = Math.random(); // you don't need range here, Math.random() is already within the range you're expecting

    Knob1.setValue(Knob1_value); Knob1.changed(); // these can be single lines if you prefer 
    Knob3.setValue(Knob3_value); Knob3.changed(); 
};

Content.getComponent("Button6").setControlCallback(onButton6Control);

If Knob1 and Knob3 already have their own Control Callbacks, you also don't need to independently call these:

SimpleGain1.setAttribute(SimpleGain1.Gain, Knob1_value); // already handled by Knob1.changed();
SimpleGain2.setAttribute(SimpleGain2.Gain, Knob3_value); // already handled by Knob3.changed();

Control.changed() is essentially simulating changing the control with the mouse, so you're basically calling the setAttribute function twice.