Loop out at marker

Adobe After Effects Expressions

Loop out at marker

Posted by Edward Clayton on June 28, 2022 at 7:49 pm
Trying to work out an expression that will loopOut() Time Remap keyframes starting at a marker.
```
startMarkerTime = thisLayer.marker.key(1).time;
```
I can get the animation to start at the marker, but not loop:
```
if (time <= startMarkerTime) {
    0	
} else {
    time - startMarkerTime
}
```
Or I can get the loop to start at the marker, but not from the first frame:
```
if (time <= startMarkerTime) {
    0	
} else {
    loopOut()
}
```
How can I get the animation to start at the marker AND loopOut starting from the first frame?
Edward Clayton replied 3 years, 10 months ago 2 Members · 5 Replies
5 Replies

Dan Ebberts

June 28, 2022 at 8:59 pm

Probably close to this:

startMarkerTime = marker.key(1).time;
if (time <= startMarkerTime) {
    0;	
} else {
    (time - startMarkerTime)%(key(numKeys).time - key(1).time);
}

Edward Clayton
June 28, 2022 at 9:40 pm

Yes, this works great! Any way of getting this to boomerang ( i.e. loopOut(“boomerang”) ) without it using the loopOut function?
Edward Clayton
June 28, 2022 at 9:59 pm

Yes, this works great! Any way of getting this to boomerang ( i.e. loopOut(“boomerang”) ) without it using the loopOut function?

Dan Ebberts

June 28, 2022 at 10:26 pm

Do you mean “pingpong”? That would be like this I guess:

startMarkerTime = marker.key(1).time;
if (time <= startMarkerTime) {
  0;	
} else {
  t = time - startMarkerTime;
  t1 = key(1).time;
  t2 = key(2).time;
  d = t2 - t1;
  n = Math.floor(t/d);
  n % 2 ? t2 - t%d : t1 + t%d;
}

Edward Clayton
June 28, 2022 at 11:19 pm

Ah yes, I meant pingpong. Perfect! Thank you, Dan.

FYI, I had to change key(1).time to key(1).value

Reply to this Discussion! Login or Sign Up

Creative Communities of the World Forums