[Toby Waskowitz]

That’s just awesome! hehe… I was also thinking the same way, I did apply the overshoot to the slider, but it didn’t work without that new line, but now it’s working flawlessly. I really want to thank you very much for helping me with this.

[Toby Waskowitz]

Here is the final version (there are two keyframes in the scale slider):

N = thisComp.layer(“Controls”).effect(“Scale”)(1)
sampleSize = [1,1];
L = thisComp.layer(“Alpha Scale”);
P = L.fromComp(toComp(anchorPoint));
lum = rgbToHsl(L.sampleImage(P,sampleSize/2,true,time))[2];
t = 0;
t1 = N.key(1).time;
t2 = N.key(N.numKeys).time;
if (lum == 1){
t = thisComp.frameDuration
while ((t < t2 – t1) && t <= time){
lTemp = rgbToHsl(L.sampleImage(P,sampleSize/2,true,time-t))[2];
if (lTemp < 1){
t -= thisComp.frameDuration;
break;
}
t += thisComp.frameDuration;
}
}
v = N.valueAtTime(t1 + t)
value + [v,v,v]

[Toby Waskowitz]

Just one more thing… if I may to ask.

I just found your Bounce and Overshoot expression:

amp = .1;
freq = 1.5;
decay = 4.0;

n = 0;
if (numKeys > 0){
n = nearestKey(time).index;
if (key(n).time > time){
n–;
}
}
if (n == 0){
t = 0;
}else{
t = time – key(n).time;
}

if (n > 0){
v = velocityAtTime(key(n).time – thisComp.frameDuration/10);
value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t);
}else{
value;
}

so… is it too much to ask to integrate it into my expression with 2 keyframes?

If that’s too much work, I understand… Thanks for everything! 🙂

[Toby Waskowitz]

Dan, you were right before. Everything works with the first expression, I was making some changes and didn’t know that “numKeys” also needs to have a FULL PATH if I use another layer’s keys. So, if anyone has the same problem, just to make it clear:

N = thisComp.layer(“Null”).transform.position

THIS IS WRONG:

N.key(numKeys).time

(it’s taking the numKeys from the layer where the expression is)

THIS IS CORRECT:

N.key(N.numKeys).time

Dan, thanks again for your help, and have a nice day! 🙂

[Toby Waskowitz]

I don’t know how, that’s why I said only sometimes, really don’t understand. But, thank you very much, you have helped me a lot!

All the best!

[Toby Waskowitz]

Everything is perfect, only sometimes it returns this error:

“this property has no keyframe number 0”

So, if I change:

“t2 = key(numKeys).time”

to

“t2 = key(2).time”

then it’s ok, I don’t know why, and I’ve tried to fix it, but still no luck. Later I will use more than two keyframes, so it would be easier not to count keyframes every time. Could you please see if it can be resolved if it’s not taking you too much time.

Thanks again!

[Toby Waskowitz]

That’s exactly it… thank you very much, you’ve saved my day! Thanks again!

All the best!

[Toby Waskowitz]

Yes Dan, you are correct, I am struggling with the time. Luminosity is animated, it can be 0 or 1. If it’s 1 then it’s TIME to trigger the animation. How can I calculate the time of “lum” when it goes from 0 to 1? Is this even possible? Please help me, and thanks for the reply! 🙂