• Adobe After Effects Expressions

  Sliders and Position

  Posted by Jonathan Lutjens on July 31, 2012 at 5:42 pm

  Hello all,

  I’ve spent about 45 minutes searching the posts to try and solve my problem. No luck yet.

  I’m trying to build a setup where the velocity (maybe it’s actually acceleration) of a layer’s position is tied to a slider so that I can simply keyframe my slider and have the layer move at a constant rate, slow down and stop or reverse smoothly.

  I found this expression, which is almost perfect except for the fact that in some places the movement is choppy.

  Can anyone offer a solution?

  Thanks much,

  Jon

  fd=thisComp.frameDuration;

  t=0;
  x=0;
  while (time>t) {
  acceleration = thisComp.layer("TimelineMoveRate").effect("Slider Control")("Slider").valueAtTime(t);
  x+=acceleration*fd;
  t+=fd;
  }

  value + [x,0,0];

  Jonathan Lutjens replied 13 years, 9 months ago 1 Member · 0 Replies
• 0 Replies

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