• Adobe After Effects Expressions

  error with valueAtTime

  Posted by Jamie Bradshaw on March 4, 2008 at 2:54 pm

  Am I going mad? Is there something wrong with this expression?

  x3 = thisComp.layer(“Null 1”).transform.position[0].valueAtTime(0);

  I keep getting an error saying that the function is undefined.

  Any help would be massively appreciated.

  Thanks,
  Jamie

  Darby Edelen replied 18 years, 5 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Dan Ebberts

  March 4, 2008 at 2:57 pm

  You need to put the array indexing at the end, like this:

  x3 = thisComp.layer(“Null 1”).transform.position.valueAtTime(0)[0];

  Dan
• 

  Jamie Bradshaw

  March 4, 2008 at 2:59 pm

  ah I see thanks a million Dan. 🙂

  Still a bit confused as to why it has that syntax. My way seems to make more sense, but who am I to argue! 🙂
• 

  Darby Edelen

  March 5, 2008 at 10:25 pm

  [Jamie Bradshaw] “Still a bit confused as to why it has that syntax”

  x3 = thisComp.layer("Null 1").transform.position[0].valueAtTime(0);

  In the above statement, thisComp.layer("Null 1").transform.position[0] evaluates to a float value which has no associated function valueAtTime().

  x3 = thisComp.layer("Null 1").transform.position.valueAtTime(0)[0];

  In the above statement thisComp.layer("Null 1").transform.position.valueAtTime(0) evaluates to the position property at a given time. A property has access to the valueAtTime() function because it is a method of the property class, where as a float value has no associated methods/functions.

  Darby Edelen
  Designer
  Left Coast Digital
  Santa Cruz, CA

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