Help with changing multiple parameters proportionally

Questions
1

So I have two parameters: Diameter and StrokeSize. The way I want this to work is when the Diameter is at it’s maximum: 600, I want the StrokeSize to be 5, which is its maximum. Same for the minimum of the parameters.

How could this be done?

function setup()
    parameter.number("Diameter",10,600,50)
    parameter.number("StrokeSize",2.5,5,2.5)
end

function draw()
    background(0)
    
    strokeWidth(StrokeSize)
    
    stroke(150,255,150,255)
    
    noFill()
    ellipse(WIDTH/2,HEIGHT/2,Diameter)
    
    line(WIDTH/2,HEIGHT/2,WIDTH/2 + (Diameter/2 -4),HEIGHT/2)
end
2

Are you going to do anything with the StrokeSize parameter. You can alter the StrokeSize based on the Diameter value and not use the StrokeSize parameter.

3

Here an example of changing the strokeWidth based on the Diameter size.

viewer.mode=STANDARD

function setup()
    parameter.number("Diameter",10,600,50)
    --parameter.number("StrokeSize",2.5,5,2.5)
end

function draw()
    background(0)
    strokeWidth(2.5+2.5*Diameter/600)    
    stroke(150,255,150,255)    
    noFill()
    ellipse(WIDTH/2,HEIGHT/2,Diameter)    
    line(WIDTH/2,HEIGHT/2,WIDTH/2 + (Diameter/2 -4),HEIGHT/2)
end
4

Thanks again!