• Adobe After Effects Expressions

  Control 2D movement on position property with angle control

  Posted by Noel Powell on May 26, 2016 at 12:58 pm

  Hi all,

  I thought I’d be able to easily find this one, but I’m not seeing it anywhere. I’m looking for an expression to convert the degree value of an angle control to X and Y movement. Basically, I want to control the direction of the noise (Offset Turbulence property) in a Fractal Noise effect with an angle control to set the direction, and a slider control to set the speed.

  Any help you can give is much appreciated.

  After Effects Templates – digital glitch effects, 80s VHS effects, old film effects, art effects, and more: https://CreationEffects.com

  Noel Powell replied 10 years, 3 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  May 26, 2016 at 1:45 pm

  This should work for static controls:

  a = effect(“Angle Control”)(“Angle”);
  spd = effect(“Slider Control”)(“Slider”);
  d = spd*(time-inPoint);
  r = degreesToRadians(a-90);
  x = d*Math.cos(r);
  y = d*Math.sin(r);
  value + [x,y]

  If you need to animate the controls, that’s a whole different story.

  Dan
• 

  Noel Powell

  May 26, 2016 at 1:54 pm

  Yeah, I assumed it would have to be static. This is very helpful, Dan. Thank you.

  After Effects Templates – digital glitch effects, 80s VHS effects, old film effects, art effects, and more: https://CreationEffects.com

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