• Adobe After Effects Expressions

  Changing Scale Based on Position

  Posted by Louis Hamwey on December 7, 2017 at 6:25 pm

  I am trying to have the scale of 2 solids be controlled by the position of a shape layer using this expression:

  a = 1;
  b = thisComp.layer(“Left_Bar”).transform.yPosition;
  d = length(a,b);
  s = (d/width)*100;

  e = thisComp.layer(“Vertical_Bar”).transform.xPosition;
  f = 1;
  g = length(e,f);
  i = (g/width)*100;

  [i,s]

  When for the top solid it works perfectly as the line moves up, it shrinks. But for the bottom solid it moves the inverse (see gif: )
  I think it’s an easy fix, I am just not very advance with expressions. Thanks!

  Andrei Popa replied 8 years, 8 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Andrei Popa

  December 8, 2017 at 9:15 am

  Try replacing second layer s with s = thisComp.height - (d/width)*100 or if your layer has the anchor point on the bottom,
  with s = transform.position[1] - (d/width)*100

  Andrei
  My Envato portfolio.

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