Opacity Driven Expression

[Dan Ebberts]

I’m guessing this may not really be what you want, but this is a simple stab at it. Each layer should pop on as the center of layer “Bar” passes (vertically) its own center.

L = thisComp.layer(“Bar”);
p = L.toWorld(L.anchorPoint);
p[1] > toWorld(anchorPoint)[1] ? 100 : 0;

Dan

[Barry Suydam]

It is an honor to be educated by Mr. Ebberts himself. It worked as it should. Thank you so much. Is there a simple way to ease in the opacity. If so that would be over the top assistance? Thanks again Dan.

[Dan Ebberts]

This version should ease in the opacity as the bar moves from the layer’s upper edge to its center:

L = thisComp.layer(“Bar”);
p = L.toWorld(L.anchorPoint);
easeIn(p[1],toWorld([0,0])[1],toWorld(anchorPoint)[1],0,100)

Dan

[Barry Suydam]

Great, thanks…

I found this expression on your website////

point1=this_layer.position;
point2=thisComp.layer(“Text Bar”).transform.scale;

delta=sub(point1, point2);

distance=length(delta);
linear(distance, 0,50, [150,150],[100,100]);

What I am trying to accomplish is as that bar moves past the text layer it moves the layer position 50 pixels on the x axis only and once it passes completely it returns to its original value. So what I came up with is the following however it don’t work. Any help would be appreciated.

point1=this_layer.position;
point2=thisComp.layer(“Text Bar”).transform.position;
x = value =50
delta=sub(point1, point2);
distance=length(delta);
ease(distance, 0,50, [x,[1]],[[0],[1]]);

[Dan Ebberts]

This probably gets you closer:

p1=transform.position;
p2=thisComp.layer(“Text Bar”).transform.position;
distance=length(p1,p2);
ease(distance,0,50,value+[50,0],value)

Dan