[Jonas Karten]

Thank you very much Dan, this is what I needed. Didn’t know about the propertyGroup yet! Great!

With the help of your code I’ve applied it to the scale within the “transform: Circle 123” tab of the individual circle:

sourceLayer = comp(“Raster”).layer(“Verlauf”);
sampleSize = [1,1];
samplePoint = toComp(thisProperty.propertyGroup(2)(“Transform”)(“Position”));
color= sourceLayer.sampleImage(samplePoint,sampleSize);
x=color[0]*100;
[x,x]

I understand that propertyGroup(2) looks up the value of the second element within the group/transform-tab, which is the position, right? Like this I can still use the percentages and a starting size of the circle.

[Jonas Karten]

Thank you very much for this detailed answer! I have to admit I didn’t expect it would be so complicated, this is a bit over my head.

With the right keywords (“constant speed” instead of “max speed”) I’ve found and older thread with a similar problem. With the help of a slider control and roving keyframes, the script creates a constant speed. I changed “linear” to “ease” and I believe it now does what I want.

if (numKeys > 1){
spd = thisComp.layer("control").effect("Slider Control")("Slider");
t1 = key(1).time;
t2 = key(numKeys).time;
tTot = t2-t1;
dTot = speedAtTime(t1)*tTot;
deltaT = time - t1;
valueAtTime(linear(deltaT*spd,0,dTot,t1,t2))
}else
value