• Adobe After Effects Expressions

  Syntax issue with taking a value from time

  Posted by Christopher Johnstone on January 30, 2013 at 4:03 pm

  Hi, I am having some problem getting an expression to work.
  I believe my problem is my sytax:

  I have plotted x and y values for a null in a separate comp.
  the x value corresponds to the frame number
  I want to grab the y value to a text layer when x = a given frame number

  In my Source Text I have created an expression [see below]

  Can anyone spot my mistakes and put me on the road to enlightenment?

  Many thanks – C

  t = comp("CNTL").layer("1").effect("1")("Slider");
value = Math.round(comp("Graph").layer("Null").transform.position[1].valueAtTime(t))

  Christopher Johnstone

  Christopher Johnstone replied 13 years, 8 months ago 1 Member · 1 Reply
• 1 Reply

• 

  Christopher Johnstone

  January 30, 2013 at 4:16 pm

  I have got it to work [see below] .. but I am still not happy with my botch job syntax
  Is there a more elegant solution?

  Many thanks – C

  t = comp("CNTL").layer("1").effect("1")("Slider");
n = comp("Graph").layer("Null").transform.position.valueAtTime(t*0.04);
value = Math.round(n[1]);


  Christopher Johnstone

Reply to this Discussion! Login or Sign Up