• Adobe After Effects Expressions

  Expression for gradually accelerating rotation?

  Posted by Tomas Kiedis on March 8, 2014 at 1:48 pm

  Hi.

  I’m animating a bicycle riding downhill (from the top of a hill to the even ground). What expression should i use to gradually accelerate bicycle’s wheels? And how do i gradually slow down the wheels after the bicycle has reached the even terrain?

  Thank you

  Jason Jantzen replied 12 years, 4 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  March 8, 2014 at 4:40 pm

  It can be tricky. Hopefully this will help:

  https://www.motionscript.com/articles/speed-control.html

  Dan
• 

  Jason Jantzen

  March 10, 2014 at 4:31 pm

  Are you having no luck with keyframes? Or is this something that you need to do a lot of? Like a bicycle cartoon animation series or something. In all my time animating wheels on vehicles, I’ve never needed an expression to make it look “right”. The reason being is because the animation isn’t usually about the wheels (in my case anyway) so the viewer’s eye shouldn’t be focused on it if you’ve designed your motion properly.

  Jason Jantzen
  vimeo.com/jasonj

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