• Adobe After Effects Expressions

  Need to automate – rotate layer A from 0 to 30 then back to 0 while B is rotating 180 deg.

  Posted by Sasha Dal ponte on November 19, 2015 at 2:34 pm

  Hello!

  I have two layers – A and B.

  Layer A is linked to null and it is rotated from 0 to 180 deg.

  Layer B is linked to layer A and it needs to rotate in a specific way.

  When layer A rotation value is 0, layer B also needs to be 0.
  When layer A rotation value is 45, layer B needs to be 30.
  When layer A is 180, layer B needs to be back to 0.

  That, of course, needs to be smooth, not in jumps.

  So I need expression that would read layer A rotation value and rotate layer B accordingly.

  Sasha Dal ponte replied 10 years, 8 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  November 19, 2015 at 5:52 pm

  Something like this should work:

  
r = thisComp.layer("Layer A").transform.rotation;
if (r < 45){
linear(r,0,45,0,30);
}else{
linear(r,45,180,30,0);
}


  Dan
• 

  Sasha Dal ponte

  November 22, 2015 at 9:14 am

  Thanks Dan!

  It works perfectly! I just adjusted 45 angle to 90 because I put it in wrong in original post.

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