Controlling the value AND the timing of a specific keyframe

Adobe After Effects Expressions

Controlling the value AND the timing of a specific keyframe

Posted by Thibault Millienne on November 26, 2020 at 3:09 pm

Hi,

I’m just facing a problem with expression. I’m not good with it, and most of the time I’m searching on the web what I need to copy/paste to get my automation done.

I have two keyframes of position and I want to control the timing and the value of the second keyframe with sliders.

I got this to control the timing :

dur = thisComp.layer(“CONTROL SCRIPT”).effect(“Slider Control”)(“Slider”);
if (time < key(1).time){
value;
}else if (time < (key(1).time + dur)){
t = time – key(1).time;
d = key(2).time – key(1).time;
valueAtTime(key(1).time + d*t/dur);
}else{
t = time – (key(1).time + dur);
valueAtTime(key(2).time + t);
}

and I got this to control the value :

if (numKeys > 1){
t1 = key(1).time;
t2 = key(2).time;
v1 = [964,598];
v2 = thisComp.layer(“CONTROL SCRIPT”).effect(“Point Control”)(“Point”);
linear(time,t1,t2,v1,v2);
}else
value

Each one work well separetly, but how can I blend them together ?

Thanks for your help !

Thibault

Dan Ebberts replied 5 years, 10 months ago 2 Members · 1 Reply
1 Reply

Dan Ebberts

November 26, 2020 at 9:58 pm

Probably something like this:

L = thisComp.layer("CONTROL SCRIPT");
dur = L.effect("Slider Control")("Slider");
point = L.effect("Point Control")("Point");
if (numKeys > 1){
  t1 = key(1).time;
  t2 = t1 + dur;
  v1 = key(1).value;
  v2 = L.toComp(point);
  linear(time,t1,t2,v1,v2);
}else
  value

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