• Adobe After Effects Expressions

  help me with rotation please

  Posted by Pasha Kulak on May 12, 2008 at 9:15 pm

  hello there i have a question about rotation

  i have an angel wing that i want rotate to fly and duplicate it to make two wings so i type this expression on the rotation

  wiggle(2,60)

  and it works fine for me i guess but when i duplicate it and flip it horisontally the wing has diffrent values all the time and its flapping really wierd

  im not good at expressions just started learning and i want to find the nicest way to animate wings

  can you help me please?

  thanks pasha.

  Dan Ebberts replied 18 years ago 2 Members · 3 Replies
• 3 Replies

• 

  Dan Ebberts

  May 12, 2008 at 11:11 pm

  You probably just need to link the second wing’s rotation to the first and give the value a negative sign, with an expression like this:

  -thisComp.layer(“left wing”).rotation

  Dan
• 

  Pasha Kulak

  May 13, 2008 at 8:18 am

  thanks dan thats exactly what i was looking for

  ohh and how can i animate it properly i just got into expressions and im pretty new to those kind of stuff how should i approach the animation of the wings?

  they are flopping properly now but i want the wing to speed up at one point i dont think keyframes will do

  any thought?

  thanks again
• 

  Dan Ebberts

  May 13, 2008 at 2:50 pm

  Let’s say you wanted the wings to speed up at 4 seconds into the comp. You could set it up like this to ease into the faster speed:

  slow = 2;
  fast = 4;
  amp = 60;
  startTrans = 3;
  transDur = 1;

  ease(time,startTrans,startTrans + transDur,wiggle(slow,amp),wiggle(fast,amp))

  Dan

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