Change value when position reaches certain value

Adobe After Effects Expressions

Change value when position reaches certain value

Posted by Shashank Raghu on October 27, 2020 at 1:59 pm
Hi,

I want Text layer Opacity to change its value from 100 to 50 when the shape layer reaches the position x & y value between 90 and 110.
```
x = transform.position[0];
y = transform.position[1];
a = thisComp.layer("Shape Layer 1").transform.position[0];
b = thisComp.layer("Shape Layer 1").transform.position[1];
z = x + y;
c = a + b;
if(z == c){
	50;
} else {
	100;
}

// Comp Size = 200, 200
// x and y value = [100, 100]
// a and b value = [100, 100]
```
in this, the opacity is exactly changing when Shape Layer reaches [100, 100],
but I want opacity to change when the shape layer position value is between [90,90] and [110, 110]

And if the Text Layer position is [50, 50] opacity should change from 100 to 50 when the Shape Layer position value reaches + or – 10(between [40, 40] and [60, 60]) to the Text Layer position value.
Shashank Raghu replied 5 years, 6 months ago 2 Members · 2 Replies
2 Replies

Brendon Murphy

October 28, 2020 at 4:42 am

try this:

x = transform.position[0];
y = transform.position[1];
a = thisComp.layer("Shape Layer 1").transform.position[0];
b = thisComp.layer("Shape Layer 1").transform.position[1];
firstMin = 40;
firstMax = 60;
secondMin = 90;
secondMax = 110;
//this sets opacity rules for when text pos is [50,50]
if (x==50 && y==50 && a>firstMin && b> firstMin && a<firstMax && b< firstMax ){
50
}else{
//if text pos is not [50,50], set the opacity based on the other shape values
if(a>secondMin && b>secondMin && a<secondMax && b<secondMax ){
50
} else {
100
};
};

Shashank Raghu
October 28, 2020 at 10:50 am

It worked thanks a lot.

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