[Dan Ebberts]

Roland,

I’m guessing that some unintentional reformatting occurred when you posted your code. I’m taking a shot at what I think you might have intended here:

let layerNames = "";
for (let i = 1; i <= thisComp.numLayers; i++) {
  if (i === index) continue;
  let targetLayer = thisComp.layer(i);
  if (targetLayer.active) {
    layerNames += targetLayer.index + " - " + targetLayer.name + "\r\n";
  }
}
layerNames.trim();

[Dan Ebberts]

My guess is that the “Adjust composition duration to the time span of the selected layers” switch in the pre-compose dialog is moving your resulting, shortened precomp off to the left on the time line so that it’s not visible.

[Dan Ebberts]

This could get complicated, depending on what you’re after, but the simplest version would probably be something like this:

posterizeTime(0);
p1 = thisComp.layer("Shape Layer 1").content("Rectangle 1").transform.position;
p2 = thisComp.layer("Shape Layer 1").content("Rectangle 2").transform.position;
minD = length(p1.valueAtTime(0),p2.valueAtTime(0));
for (i = 1; i < timeToFrames(thisComp.duration); i++){
  t = framesToTime(i);
  d = length(p1.valueAtTime(t),p2.valueAtTime(t));
  minD = Math.min(d, minD);
}
minD

[Dan Ebberts]

This would be one way:

checkboxOn=thisComp.layer("CHECKBOX-CTRL").effect("BLUR-ON_OFF")("Checkbox").value;
keyframeValue=15;
k1 = key(1).time;
k2 = key(2).time;
k3 = key(3).time;
k4 = key(4).time
if (checkboxOn){
  if (time < (k2 + k3)/2){
    ease(time,k1,k2,valueAtTime(k1),keyframeValue);
  }else{
    ease(time,k3,k4,keyframeValue,valueAtTime(k4));
  }
}else
  value

[Dan Ebberts]

Maybe start with something like this:

checkboxOn=thisComp.layer("CHECKBOX-CTRL").effect("BLUR-ON_OFF")("Checkbox").value;
keyframeValue=15;
k1 = key(1).time;
k2 = key(2).time;
if (checkboxOn){
  ease(time,k1,k2,valueAtTime(k1),keyframeValue);
}else
  value

[Dan Ebberts]

So what is it that you want the checkbox to do, exactly?

[Dan Ebberts]

To run it in reverse, you need to define an end point, so you could introduce a new variable, totalDur, for that purpose, and modify one line of the expression to reverse it, like this:

freq = 3;
decay = 5;
totalDur = 3;
t = (inPoint +totalDur) - time;
startVal = [0,0];
endVal = [200,200];
dur = 0.1;
if (t < dur){
  linear(t,0,dur,startVal,endVal);
}else{
  amp = (endVal - startVal)/dur;
  w = freq*Math.PI*2;
  endVal + amp*(Math.sin((t-dur)*w)/Math.exp(decay*(t-dur))/w);
}

You could tie any of the variables (first 3 lines) to sliders.

[Dan Ebberts]

You were close. Try it this way:

var compLength = thisComp.duration / thisComp.frameDuration;
var posX = thisComp.layer("shape").transform.xPosition;
for (i = 0; i <= compLength; i++) {
 if (posX.valueAtTime(framesToTime(i)) >= 500) break;
}
i

[Dan Ebberts]

You could try a scale expression like this, to counteract the scaling of the parent shape layer:

s = parent.scale;
[value[0]/s[0],value[1]/s[1]]*100

You might need to move the text layer’s anchor point to the bottom of the shape layer to keep gap from changing size as the shape scales.

[Dan Ebberts]

I’m probably missing something, but I get fully saturated colors if I have the Color Balance (HLS)’s Lightness set to 0 and the Saturation set to 100. I only get white if I move Lightness to 100.