• Adobe After Effects Expressions

  Parent a especific keyframe

  Posted by Gabriel Silva on February 25, 2019 at 1:49 pm

  Hello guys! I’m sorry for the writing, I’m translating for google.
  Anyway, I have a rectangle A and a rectangle B.
  Rectangle A has a fixed scale.
  In rectangle B I have an animation with 2 keyframes of the scale.
  I need to parent the last keyframe of rectangle B with the scale of rectangle A.

  Can you help me?

  Gabriel Silva replied 7 years, 2 months ago 3 Members · 7 Replies
• 7 Replies

• 

  Andrei Popa

  February 25, 2019 at 2:23 pm

  Try this

  thisComp.layer("B")("ADBE Transform Group")("ADBE Scale").key(2).value

  Andrei
  My Envato portfolio.
• 

  Gabriel Silva

  February 25, 2019 at 3:29 pm

  did not work. I took a print.
• 

  Gabriel Silva

  February 25, 2019 at 3:30 pm

  
• 

  Alex Printz

  February 25, 2019 at 5:36 pm

  try this:

  linear( time, key(1).time, key(2).time, key(1).value, content(“Rectangle 1”).content(“Rectangle Path”).size);

  Alex Printz
  Mograph Designer
• 

  Gabriel Silva

  February 25, 2019 at 5:50 pm

  It worked but I can not change the velocity of keyframes.
• 

  Alex Printz

  February 25, 2019 at 7:47 pm

  okay, this is an unusual way to do this, but it should work with some restrictions (so long as the two different keys are not the same X-size). The only way to tweak the velocity of keys is on the actual property (scale), so I am telling it to look at how it changes from the first into the 2nd key for the x-property, but instead of acting as that value to instead grab the other rectangle’s value. Hope it works for you:

  linear(value[0], key(1).value[0], key(2).value[0], key(1).value, content(“Rectangle 1”).content(“Rectangle Path”).size);

  Alex Printz
  Mograph Designer
• 

  Gabriel Silva

  February 25, 2019 at 8:02 pm

  Oks Thanks so much for the tips! They helped me a lot!

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