• Adobe After Effects Expressions

  How to animate in point and out point of layer with expressions?

  Posted by mehmet turhan on January 23, 2021 at 2:08 pm

  I’m trying to animate the in opacity and out opacity of a layer with just an expression

  linear(time,inPoint, inPoint+.5, 0, 100)

  linear(time,outPoint+.5, outPoint, 100, 0)

  This is what I did. It seems the second line always overwrites the first one. How would you animate layer appearing with opacity and disappearing with opacity with just expressions?

  mehmet turhan replied 5 years, 4 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Filip Vandueren

  January 23, 2021 at 8:17 pm

  if (time <= inPoint+0.5) {
      output = linear(time,inPoint, inPoint+.5, 0, 100);
  } else {
      output = linear(time,outPoint+.5, outPoint, 100, 0);
  }
  output;
• 

  Othman Ahmed

  January 23, 2021 at 9:44 pm

  Simple modification.

  <pre data-placeholder=””>

  if (time <= inPoint+0.5) { output = linear(time,inPoint, inPoint+.5, 0, 100);

  } else {

  output = linear(time,outPoint-.5, outPoint, 100, 0); // just replace + with –

  }

  output;
• 

  mehmet turhan

  January 24, 2021 at 2:16 pm

  Thanks! It makes sense and worked perfectly!

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