Something like this, I think:

 

s = thisComp.layer("other layer").effect("Slider Control")("Slider");

t = time;

if (s.numKeys > 0){

  n = s.nearestKey(time).index;

  if (s.key(n).time > time) n--;

  if (n > 0) t = time - s.key(n).time;

}

timeToFrames(t);

 

 

Dan

 

From: Phil Spitler

Sent: Monday, November 04, 2013 5:05 PM

To: After Effects Mail List

Subject: Re: [AE] Expression

 

I think my description wasn't clear....

 

I'm actually using it to reset a text layer frame counter to zero on every keyframe of a different layer.

 

Thanks.

 

Phil

 

 

 

 

 

Phil Spitler  |  Creative Technologist   |  Bonfire Labs  |  t : 415.394.8200  m : 415.571.3139

Website | Facebook | LinkedIn

 

On Nov 4, 2013, at 4:41 PM, Zack Lovatt wrote:

Even easier! Apply this to the slider.

 

L = thisComp.layer("Target Layer");
if (L.transform.opacity.numKeys != 0){
0; // If the target layer has any keys, set slider to 0.
} else {
value; // If there are no keys, use the slider value.
}

 

Or, more concise:

 

if (thisComp.layer("Target Layer").transform.opacity.numKeys != 0) 0 else value;

 

Zack Lovatt

416.786.4129

www.zacklovatt.com

On 4 November 2013 19:36, Phil Spitler <phil@bonfirelabs.com> wrote:

I'm trying to figure out an expression that will reset a slider to 0 every time there is a keyframe in opacity on a specified layer.

 

I'm guessing it will be some kind of trick where I look at the key(x).time and compare it to the current time.

 

Any ideas?

 

Cheers.

 

Phil

 

Phil Spitler  |  Creative Technologist   |  Bonfire Labs  |  t : 415.394.8200  m : 415.571.3139

Website | Facebook | LinkedIn