• Adobe After Effects Expressions

  Triggering Repeating animation with Markers

  Posted by Owen Rucker on February 13, 2018 at 3:57 pm

  I want to make either a null or slider move X amount every time it hits a layer marker. In this case x = -135.

  BUT

  I don’t want it to start from 0 every marker, which is the only thing I can find right now.

  So if it’s a slider, when it hit’s the first Marker 1 it moves from 0 to -135. I don’t know how to make Marker 2 trigger -135 to -270. Marker 3 from -270 to -405. And so on and so forth.

  Is this possible?

  Owen Rucker replied 8 years, 3 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  February 13, 2018 at 5:26 pm

  If you want it to jump at each marker, you could do it like this:

  
n = 0;
if (marker.numKeys > 0){
n = marker.nearestKey(time).index;
if (marker.key(n).time > time) n--;
}
value + [-135*n,0]


  If you want it to slide, it would be like this:

  
n = 0;
if (marker.numKeys > 0){
n = marker.nearestKey(time).index;
if (marker.key(n).time > time) n--;
}
x = 0;
if (n > 0){
easeTime = .25;
t = time - marker.key(n).time;
x = ease(t,0,easeTime,-135*(n-1),-135*n);
}
value + [x,0]


  Dan
• 

  Owen Rucker

  February 13, 2018 at 6:08 pm

  This works. Thanks so much!

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