• Adobe After Effects Expressions

  Disable a layer at a specific time?

  Posted by Rabhw1 on May 13, 2007 at 4:52 am

  Hi, I’m new to expressions and I’ve tried my best to find out how to do this…I see there is a property called active which returns a 1 if the layer is active and a 0 if it is not.

  The second question related to this is since this is a general layer property, where do I add the expression? (In other words, which “stopwatch” do I alt-click on and enter this expression?)

  I’m trying to disable a layer at a given time. Lowering the opacity isn’t an option unfortunately!

  Any help would be greatly appreciated!

  Thanks,

  Ross

  Filip Vandueren replied 18 years, 11 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Lord Scales

  May 13, 2007 at 2:46 pm

  Well, try changing the In and the Out Points to disable your layer. It is one alternative. But if it is not posible, I can’t help because I could connect a Checkbox Control (Effect/Expression Controls/Checkbox control) to the active switch, but I was unable to do the inverse.

  The stopwatch is in red:
  

  Lord Scales
• 

  Filip Vandueren

  May 13, 2007 at 6:36 pm

  active is a read-only property,

  so you can ask if a layer is active (it’s eyeball is on, and the time is between it’s in- and out-point)

  But you cannot assign an expression somewhere to ‘click’ the eyeball for you, or move the in- or outpoint.

  why is opacity zero not an option ?

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