• Adobe After Effects Expressions

  for loop

  Posted by Eric Sanderson on September 23, 2015 at 4:15 pm

  Ive been doing some extendScript training, and in an effort to better understand practical applications of a for loop in AE i rigged something very simple up to test, unfortunately with no result (no errors, but not the behavior I’m going for).

  i just have 10 or so layers lined up in a row on X. All with 50% opacity except for one randomly picked layer which is 100.

  Just trying to loop through to find the layer with 100% opacity, and move the expression’d layer to the same spot on X.

  if i change the “100” to “50”, the object will in fact jump to the last layer, that does happen to be at 50% opacity. But it just doesn’t seem to be finding the layer with 100% opacity, does nothing. Hope this is simple enough to make sense, or anyone has some better for exercises i could play with.

  Thanks

  for( i=1; i <= thisComp.numLayers; i++){

  curLayer = thisComp.layer(i);

  if(curLayer.transform.opacity == 100){
curLayer.transform.xPosition
}else{
0
}
}

  Dan Ebberts

  

  replied 10 years, 7 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Dan Ebberts

  September 23, 2015 at 8:46 pm

  More like this maybe:

  
val = 0;
for( i=1; i <= thisComp.numLayers; i++){
if (i == index) continue; // skip myself
curLayer = thisComp.layer(i);
if(curLayer.transform.opacity == 100){
val = curLayer.transform.xPosition;
break;
}
}
val


  Dan

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