• Adobe After Effects Expressions

  Expression related rotation to opacity

  Posted by Desi Diaz on January 17, 2017 at 8:45 am

  Hello! I’m relentlessly looking for an expression to get a layer to reach a rotation of -7% its opacity is turns to 0% and when I get to -6% rotation return to an opacity of 100%, I’m doing cut-out animation of One wing and I would like it to change automatically when it reaches a certain rotation.
  The idea is to disappear completely from one frame to another and not gradually.
  I had thought a formula like that
  If object x reaches rotation -7% then opacity 0%
  If object x reaches rotation -6% then opacity 100

  But I know very little of expressions and I do not know if it can be done. Can anyone help me? I would be eternally grateful!
  Im sorry my english is quite bad 🙁

  Coen Rens replied 9 years, 3 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Coen Rens

  January 30, 2017 at 4:01 pm

  It can be done with a linear function, which interpolates in a linear fashion between a minimum and maximum value.

  See the attached code, which should be entered to your opacity property
  .
  Replace ‘object x layer name’ with the layer name of your object x, but leave both the ” quotation marks.

  linear( thisComp.layer("object x layer name").rotation, -7, -6, 0, 100 )

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