• Adobe After Effects Expressions

  Scale via control layer

  Posted by Mark Mitchell on February 21, 2019 at 10:16 am

  I am trying to achieve the apple dock effect by using the jjgifford expression but the demo ae doc is too old to open and something isn’t working with the expression in CC2019. Here is the link. I have looked at many examples of how to do this. This seemed to fit if only I can get it to work. Any other suggestions of how this can be achieved are welcome.

  https://jjgifford.com/expressions/geometry/length.html

  // Scale with control layer
// Applied to scale parameter

  // Point1 is current layer, point2 is control layer
  point1=this_layer.position;
  point2=this_comp.layer("Drag Me").position;

  // Find the vector between the 2 points
  delta=sub(point1, point2);

  // Now find the length
  distance=length(delta);

  //Remap distance to large scale when near, small when far
  linear(distance, 0, 80, [250,250], [75,75]);;

  Regards

  Mark

  Mark Mitchell replied 7 years, 6 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  February 21, 2019 at 2:11 pm

  The syntax just needs a little updating:

  // Scale with control layer
  // Applied to scale parameter

  // Point1 is current layer, point2 is control layer
  point1=thisLayer.position;
  point2=thisComp.layer(“Drag Me”).position;

  // Find the vector between the 2 points
  delta=sub(point1, point2);

  // Now find the length
  distance=length(delta);

  //Remap distance to large scale when near, small when far
  linear(distance, 0, 80, [250,250], [75,75]);

  Dan
• 

  Mark Mitchell

  February 21, 2019 at 5:10 pm

  Hi Dan,
  Thanks that works! Very grateful for your help.

  Regards

  Mark

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