Linking multiple layers to a main layer

The script guide said nothing about it.

You must use the duplicate() layer and the effect, and then set a correct expression which will connect duplicates the original.

To define an expression, simply do myProperty.expression = myExpression. (string)

You must ensure that the initial layer and effect both have a unique name.

Code example (works for most of the effects, except the paint and a few others, who has a tree of property more complex):

var numDuplicates = 15;
var comp = app.project.item(1);
var mainLayer = comp.layer(1);
var index = mainLayer.index;
var mainEffect = mainLayer.effect("ADBE Fill");
var effectPath = "thisComp.layer(\""+mainLayer.name+"\").effect(\""+mainEffect.name+"\")";

// create a 1st duplicate, and link the effects properties:
var dup = mainLayer.duplicate();
var effect = dup.effect(mainEffect.propertyIndex);
var n, N=effect.numProperties;
for (n=1; n<=N; n++){
    if (effect.property(n).canSetExpression){
        effect.property(n).expression = effectPath+"("+n+");";
        };
    };

dup.moveAfter(comp.layer(++index));

// duplicate more times (numDuplicates-1 times)
for (n=1; n
Xavier
 
         
 
         
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 Tags: After Effects
 
         
         
 
          
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: F
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