• Adobe After Effects Expressions

  An odd BUG in the AE expressions drove me nut

  Posted by Mehdi Rafeie on September 1, 2013 at 12:58 pm

  Hi all (specially Dan!)

  Did you know that Javascript engine of “AE CS 6” cannot detect ‘7’ nor ’14’ number in ‘y’ component of a ‘Point’?!!!

  Assume there is a text layer which has an expression effect of type Point. (Let me name it “P” and set it to [6, 7].) Now, insert the following code for the Source Text of this layer.

  if (thisLayer.effect("P")("Point").value[1] == 7)
"YEP";
else
"Cannot detect 7 number!";

  Mehdi Rafeie replied 13 years ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  September 1, 2013 at 4:25 pm

  I’m not seeing that behavior, but it might depend on how you’re setting the value. I wouldn’t set up a test that way, because as I recall, Point Controls get some spatial interpolation (like position keyframes), so I would do it more like this:

  if(Math.abs(effect(“Point Control”)(“Point”)[1] – 7) < .001)
  “YEP”
  else
  “NOPE”;

  Dan
• 

  Mehdi Rafeie

  September 3, 2013 at 6:11 am

  Thanks a lot Dan!

  In my case, I used an expression effect of type ‘Point’ to hold ‘table cell index’ value in my project and the workaround I used is as follows. Anyway, thanks for your attention.

  var cellIndex = thisLayer.effect("P")("Point");

  var i = parseInt(cellIndex[0]);
var j = parseInt(cellIndex[1]);

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