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A
Alexander32178544ss6g
Known Participant
November 5, 2023
Answered

Increasing the value of a property using markers with linear interpolation

  • November 5, 2023
  • 2 replies
  • 759 views

Hello Community!

 

How can I pimp the following expression with a linear interpolation 5 frames before the marker?

 

 

if (marker.numKeys > 0) {
    nearestMarker = marker.nearestKey(time);
    if (nearestMarker.time > time){
        nearestMarker.index - 1;
    } else {
        nearestMarker.index;
    }
}

 

 

I want to have a smooth transition between the previous and next value 5 frames before the next value.

 

 

Many thanks!

    This topic has been closed for replies.
    Correct answer Dan Ebberts

    Something like this maybe:

     

    m = marker;
val = 0;
if(m.numKeys > 0){
  n = m.nearestKey(time).index;
  if (time >= m.key(n).time) n = Math.min(m.numKeys,n+1);
  t = m.key(n).time - time;
  val = linear(t,0,framesToTime(5),n,n-1);
}
val

     

    2 replies

    Dan Ebberts
    Community Expert
    Dan EbbertsCommunity ExpertCorrect answer
    Community Expert
    November 5, 2023

    Something like this maybe:

     

    m = marker;
val = 0;
if(m.numKeys > 0){
  n = m.nearestKey(time).index;
  if (time >= m.key(n).time) n = Math.min(m.numKeys,n+1);
  t = m.key(n).time - time;
  val = linear(t,0,framesToTime(5),n,n-1);
}
val

     

      Mylenium
      Mylenium
      Legend
      November 5, 2023

      https://www.motionscript.com/design-guide/marker-sync.html

       

      https://www.motionscript.com/design-guide/audio-trigger.html

       

      Based on that, you need to use a linear() interpolator to blend between the values. it's not really clear what you want to do, though. If you use a range selector stuff liek the animators interpolation options matter as well and that alone could be sufficient to create the delay without even resorting to expressions.

       

      Mylenium

      A
      Alexander32178544ss6gAuthor
      Known Participant
      November 5, 2023

      Hi @Mylenium. Thank you for your feedback.

       

      I would like to achieve exactly what the above expression already does, and that is to increase the value of a property by a whole number at each marker - but with a linear() interpolation --> five frames before the marker.

       

      You're right, but in my case,  options do not help. I am familiar with them.

       

      Thank you.

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