• Adobe After Effects Expressions

  Offset cloned pixels on one axis only

  Posted by Chris Huggett on February 12, 2008 at 4:08 pm

  HI guys

  Im doing some cloning, where i have tracked an object, and offset the attached point of the tracher. I have used the clone tool with an expression (pick whip) to the attach point, but i need to offset the attach point. I know there is an offset control but that does not help me with this as it returns values of 0,0 when used with the pick whip.

  Rather than re-do the track, i thought there would be a simple expression that would allow me to offset the attach point by 6 pixels or so on the x axis.

  MY current expression looks like this

  motionTracker(“Tracker 4”)(“Track Point 1”).attachPoint

  Hope someone can point me in the right direction. Im guna try and give it a go nonetheless.

  Thanks
  C.

  Dan Ebberts

  

  replied 18 years, 2 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Chris Huggett

  February 12, 2008 at 4:37 pm

  Ok i think i got it.

  On the attach point, i used this expression.

  x = motionTracker(“left logo”)(“Track Point 1”).attachPoint[0]+10;
  y = motionTracker(“left logo”)(“Track Point 1”).attachPoint[1];
  [x,y]

  It seemed to have worked for me.

  Just out of curiosity, was there an easier way to do it?
  thanks
  c.

  Thanks guys

  Chris
  Sydney, Australia

  http://www.acclaim.tv
• 

  Dan Ebberts

  February 12, 2008 at 5:09 pm

  This is a little more compact way of doing it:

  motionTracker(“left logo”)(“Track Point 1”).attachPoint + [10,0];

  Dan

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