scale & opacity with 2 in-out referance point - AE Expression

scale & opacity with referance - AE Expression.jsx

//scale & opacity with 2 in-out position referance point - AE Expression
//add expression to objects scale (2 value):

        [linear(thisComp.layer("Null 3").transform.xPosition    //linear`s source
        , thisComp.layer("Null 1").transform.xPosition          //min Value of referance
        , thisComp.layer("Null 2").transform.xPosition          //max Value of referance
        , 100, 0)                                               //linear's output values
        ,value[1]];                                             //second dimension value

/////////
//USAGE:   [linear(----------------linear`s source-------------,---------------min Value---------------------,--------------max Value----------------------, 100, 0), 2nd dimension]
           [linear(thisComp.layer("Null 3").transform.xPosition, thisComp.layer("Null 1").transform.xPosition, thisComp.layer("Null 2").transform.xPosition, 100, 0), value[1]     ]     
           
           
 //add expression to objects Opacity (1 value):

        [linear(thisComp.layer("Null 3").transform.xPosition    //linear`s source
        , thisComp.layer("Null 1").transform.xPosition          //min Value of referance
        , thisComp.layer("Null 2").transform.xPosition          //max Value of referance
        , 100, 0);                                              //linear's output values