• Adobe After Effects Expressions

  inverted ease()?

  Posted by Micheel Leavitt on September 6, 2009 at 4:36 pm

  Hate to bug you guys again, but I’m curious to know if there is a way to sort of invert(right word?) the ease() function. Instead of starting fast and ending fast, I wanted to start slow, speed up, and then slow down. Is this possible? Any help on this would be great, thanks a lot guys for being here for odd questions like this!

  Filip Vandueren replied 16 years, 8 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Dan Ebberts

  September 6, 2009 at 8:39 pm

  I think ease() already works that way – starts slow, speeds up, slows down at the end.

  Dan
• 

  Micheel Leavitt

  September 6, 2009 at 10:00 pm

  hahaha, ya it does. << Feels stupid. Thanks again Dan.
• 

  Filip Vandueren

  September 7, 2009 at 12:32 am

  For future reference,

  an inverted ease() would work something like this:

  tMin=0;
tMax=2;
value1=[-100,0];
value2=[100,0];

  tHalf=(tMin+tMax)/2;
  valueHalf=(value1+value2)/2;

  inv_ease = time < tHalf ? easeOut(time,tMin,tHalf,value1,valueHalf) : easeIn(time,tHalf,tMax,valueHalf,value2);

  value+inv_ease;

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