Slider Control Incrementing up Every Marker

[Mark Quinones]

Hello, I’m working on an expression that moves a Slider Control up by 40 every time the playhead passes a marker, it’s incrementing up every marker like I want but the linear I’m using doesn’t work, the slider goes up the full amount in 1 frame instead of over half a second like I would expect, what might be causing this?

 

var moveTime = .5;
var moveAmount = 40;

if (thisLayer.marker.nearestKey(time).time < time) {
  markerCount = thisLayer.marker.nearestKey(time).index + 1;
} else markerCount = thisLayer.marker.nearestKey(time).index;
  //Returns the index of the marker ahead of the current time

var moveStart = thisLayer.marker.key(markerCount).time;

if (time = moveStart) {
  scroll = linear(time, moveStart, moveStart + moveTime,(markerCount-1)*moveAmount,markerCount*moveAmount);
}

scroll;

 

[Dan Ebberts]

I’d do it like this:

moveTime = .5;
moveAmount = 40;
m = marker;
scroll = 0;
if (m.numKeys > 0){
  n= m.nearestKey(time).index;
  if (time < m.key(n).time) n--;
  if (n > 0){
    t = time - m.key(n).time;
    scroll = (n-1)*moveAmount + linear(t, 0, moveTime, 0, moveAmount);
  }
}
scroll

[Mark Quinones]

This worked perfectly, thanks for your help.