• Adobe After Effects

  Count frames until an animation property reaches a certain value

  Posted by Klaus Hertweck on May 16, 2025 at 9:50 am

  I have a simple animation, a shape layer is moving from left to right.

  Now I want know at which frame the X-value of the reaches 500.

  I have set up this expression, but it does not work:

  var compLength = thisComp.duration / thisComp.frameDuration;

  var posX = thisComp.layer(“shape”).transform.xPosition;

  for (i = 0; i <= compLength; i++) {
  posX.valueAtTime(framesToTime(i)) = 500
  }
  i

  i should return the frame value, but is doesn’t.

  Any help would be greatly appreciated.

  Brie Clayton

  

  replied 12 months ago 4 Members · 6 Replies
• 6 Replies

• 

  Dan Ebberts

  May 16, 2025 at 11:07 am

  You were close. Try it this way:

  var compLength = thisComp.duration / thisComp.frameDuration;
  var posX = thisComp.layer("shape").transform.xPosition;
  for (i = 0; i <= compLength; i++) {
   if (posX.valueAtTime(framesToTime(i)) >= 500) break;
  }
  i
• 

  John Martin

  May 16, 2025 at 11:07 am

  i’m recording a custom tutorial for you with the solution, just wait for a little bit and you’ll see it!
• 

  John Martin

  May 16, 2025 at 11:48 am

  solution:

  https://youtu.be/Th_g34bgOdw
• 

  Klaus Hertweck

  May 16, 2025 at 12:55 pm

  Hi Dan,

  thanks a lot! This works perfectly!
• 

  Klaus Hertweck

  May 16, 2025 at 1:00 pm

  Hi John,

  thank you very much for visualising your solution!
• 

  Brie Clayton

  May 16, 2025 at 11:27 pm

  Thanks for solving this, John!

  

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