Can I check if a layer has an effect?

thehardme · **Joined:** Wed Sep 21, 2005 3:47 am **Posts:** 9

Hi to all!

I am tweaking Ebberts' collission detector for a project. There are going to be a lot of layers in the comp, and some of them will work as obstacles for a collision. I want to make some of these layers obstacles, and one object to collide should detect them. So the ideal would be

if (L.effect("IsObject")(Checkbox))

to check every layer in every frame before going to the collision check. But if a layer doesn't have an effect called IsObject, the expression won't work. Is there a way to detect if a layer has an effect with particular name so I don't have to create this effect on every layer?

Regards

Dan Ebberts · **Posted:** Tue Aug 23, 2011 11:31 am

Here's an example that should count the layers with the checkbox:

Code:

n = 0;
for (i = 1; i <= thisComp.numLayers; i++){
  if (i == index) continue; // skip myself
  try{
    thisComp.layer(i).effect("isObject")("Checkbox");
  }catch (e){
    continue;
  }
  n++;
}
n

Dan

thehardme · **Joined:** Wed Sep 21, 2005 3:47 am **Posts:** 9

Thanks a lot, Dan, it's now working beatifully.

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Can I check if a layer has an effect?

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