• Adobe After Effects Expressions

  wiggle color between two keyframes

  Posted by Jacob Roth on March 7, 2018 at 6:10 pm

  Hi all,

  I’m trying to get a solid to wiggle between two color values and I’m using dan ebberts expression for frequency found on motionscript.com, not even knowing if this is the right approach. I’m getting a bad argument at line 16: argument 5 to wiggle must be scalar.

  A) is this even the right approach

  B) if not, how do I do it.

  freq = effect("Color Control")("Color");
amp = 10;
n = freq.numKeys;
if (n > 0 && freq.key(1).time < time){
accum = freq.key(1).value*(freq.key(1).time - inPoint);
for (i = 2; i <= n; i++){
if (freq.key(i).time > time) break;
k1 = freq.key(i-1);
k2 = freq.key(i);
accum += (k1.value + k2.value)*(k2.time - k1.time)/2;
}
accum += (freq.value + freq.key(i-1).value)*(time - freq.key(i-1).time)/2;
}else{
accum = freq.value*(time - inPoint);
}
wiggle(1,amp,1,.5,accum)


  Jacob Roth replied 8 years, 4 months ago 2 Members · 4 Replies
• 4 Replies

• 

  Dan Ebberts

  March 7, 2018 at 6:34 pm

  A) I don’t think so.

  B) What are you trying to do exactly?

  Dan
• 

  Jacob Roth

  March 7, 2018 at 6:38 pm

  I have two different color values, and I’d like to start at one, wiggle between the two for x amount of frames, and then return smoothly to the original color.
• 

  Dan Ebberts

  March 7, 2018 at 7:06 pm

  If your two colors are keyframed, play around with this:

  color1 = key(1).value;
  color2 = key(2).value;
  rampTime = .25;
  w = rotation.wiggle(3,1) – rotation;
  c = linear(w,-1,1,color1,color2);
  linear(time,key(2).time-rampTime,key(2).time,c,key(1).value);

  Dan
• 

  Jacob Roth

  March 7, 2018 at 7:13 pm

  It’s close enough.

  Thanks for everything you do, Dan. You’ve saved my butt multiple times.

Reply to this Discussion! Login or Sign Up