• Adobe After Effects Expressions

  To make a snowflake fade in and out gradually in a pattern

  Posted by Lee Wit on November 28, 2012 at 11:29 am

  Hello experts,

  I’m working on an animation and I need my snowflakes to fade in and out gradually thouought the scene.

  I think it has to do with Scale parameter.

  I know it might be easy for some of you but I’m kind of newbie 😐

  Thanks for your help!

  Lee Wit replied 13 years, 9 months ago 3 Members · 4 Replies
• 4 Replies

• 

  Todd Kopriva

  November 28, 2012 at 9:05 pm

  Why do you think that fading in and out has to do with Scale? Fading in and out is typically accomplished by animating the Opacity property.

  ———————————————————————————————————
  Todd Kopriva, Adobe Systems Incorporated
  After Effects quality engineering
  After Effects team blog
  ———————————————————————————————————
• 

  Lee Wit

  November 29, 2012 at 10:19 am

  I meant fading in and out by shrinking to zero then to a particular size, not reducing and increasing Opacity. This is to do with Scale property.

  Sorry for not putting clear.

  I have seen codes that control different parameters back and forth between values endlessly. I hope there is something similar for Scale.

  Thanks
• 

  Dan Ebberts

  November 29, 2012 at 2:23 pm

  Like this maybe:

  freq = 2;
  minScale = 0;
  maxScale = 100;

  t = time – inPoint;
  amp = (maxScale-minScale)/2;
  s = minScale + amp*(1-Math.cos(t*freq*Math.PI*2));
  [s,s]

  Dan
• 

  Lee Wit

  November 29, 2012 at 2:44 pm

  Yes indeed!
  Thank you!!

Reply to this Discussion! Login or Sign Up