[Sheikh Ghanee]

I did not consider of possibility of a display to start at non zero value.
Thanks for pointing out.
I should test it out.
my code goes like this.

var screenSizeX = 0;
var screenSizeY = 0;
var numArgs = $.screens.length;
//Get combined resolution of the screen including multiple display setups
for (i = 0; i < numArgs; i++) {
var scnSize = $.screens[i];
if (scnSize.right > screenSizeX) {
screenSizeX = scnSize.right;
}
if (scnSize.bottom > screenSizeY) {
screenSizeY = scnSize.bottom;
}
}

[Sheikh Ghanee]

Hi,
Thanks for your solution. I really appreciate it.
I had to solve it in couple of days, so I already did it.
This is quite literally the technique I used to solve the issue.

Creating a dummy window, borderless with zero opacity did the trick.
Yes, if we calculate the maximum resolution from the primary display, It works very well with multiple displays.
I used multiple event listeners for this dummy window like “blur” and “mouse down” to dismiss the window, and to avoid bugs if the user moves the focus away from this dummy window.

Waiting for the tool to be posted online so that I can share the code.
But thanks again.

[Sheikh Ghanee]

You can use value remapping technique to achieve this effect.
linear() – expression is helpful here.
Assign the below expression to scale of the shadow layer and edit “Name of Trunk Layer” in the expression.

yPosition = thisComp.layer("Name of Trunk Layer").transform.position[1];//Get the y position value of the trunk layer
// Here we set minimum and maximum for the value receive from trunk layer
inMin = 300;//the highest y position of trunk layer that affects the shadow layer
inMax = 600;//lowest y position of trunk layer
// Here we set minimum and maximum value for scale X of shadow layer
outMin = 100;//when trunk goes far from shadow, scale X increases till its hits value 100
outMax = 10;//when trunk comes near to shadow, scale X decreases till its hits value 10

scaleXaxis = linear(yPosition,inMin,inMax,outMin,outMax);

[scaleXaxis, 50]