• Adobe After Effects Expressions

  adding a value to a subsequent layer’s property

  Posted by Riccardo Sinti on September 7, 2008 at 9:22 pm

  I have a text layer which I’ve put an opacity text animator.
  I’m using opacity to reveal each letter one at a time using the offset parameter.
  So with a start of 0 and and end of 1 and offset at zero, the first letter of my text line is visible.
  I can dupe my layer and set that layer’s offset to 1 and that will reveal the second letter.

  What i want is an expression that I can put on the 1st layer’s offset so that each time I dupe the layer the new layer will have the offset value increase by one, so that all I have to do is keep hitting apple-D and all my letters will be revealed on it;s own layer,

  I suppose what i really want is how to do this with all sorts of parameters.

  Say I want each duped layer to be 10 bigger in scale than the previous, etc.

  Thanks!

  Dan Ebberts replied 18 years ago 2 Members · 1 Reply
• 1 Reply

• 

  Dan Ebberts

  September 7, 2008 at 11:16 pm

  Just use the layer’s index, which is the same as its number in the timeline window. For your scale example you could do it like this:

  [10,10]*index

  Layer 1 will be at 10%, layer 2 will be at 20%, etc.

  If you want the largest layers at the top of the stack, you’ll have to do something like this:

  n = thisComp.numLayers;
  [10,10]*(n + 1 – index)

  Depending on what you’re doing, you text animator expression might be as simple as this:

  index

  Dan

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