Solo Layer in Composition using Scripting

[borus1]

Hi all,

I'm looking for a way to cycle through layers using scripting.

The ultimate goal is to make a very quickly customizable slideshow.
In this project I have several boxes, in which I'd like to show a Composition. Each composition contains just a stack of layers (easily changeable with dragging and dropping) with a different photo on each layer.
Using a Slider Control I'd like to cycle through the photos of a composition. For example: when I select value 4 using the Slider, the fourth layer is made visible. In this way I could keyframe the slider to select a photo.

Any thoughts on how to accomplice this? I can't seem to find a good website about scripting time events. Most of them only contain motion scripting.

Thanks in advance!

[Dan Ebberts · Accepted solution]

I think you'd want an expression here, not a script. I'd use an opacity expression (on each of the photo layers) with an expression like this:

s = // link this variable to your slider;

(Math.round(s) == index) ? 100 : 0;

Dan

[borus1]

Thanks a lot!
Not exactly as I pictured it, but it works perfectly!

And indeed, I was looking for an expression in stead of a script.

[Quantum Catnip]

Awesome, thank you!