• Adobe After Effects

  Wiggle expression help

  Posted by Artcross on July 10, 2006 at 3:34 am

  I’m trying to wiggle just the z paramter of the position array, but I’m not sure how to do it. I tried

  position=[position[0], position[1], position[2].wiggle(20,30)]

  but that doesn’t work. I’m very new to expressions, so if someone can explain how to modify vectors, or more specifically, how to use the wiggle expression with vectors, i’d be very grateful. Thanks!

  Mike Clasby replied 20 years, 2 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Julian Sixx

  July 10, 2006 at 4:34 pm

  Hi
  you are very close

  [position[0],position[1],wiggle(10,20)[2]]
• 

  Mike Clasby

  July 10, 2006 at 5:07 pm

  This earlier post from Dan shows how:

  https://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=881140

  In your case, without the sliders:

  freq = 20;
  amp = 30;
  w = wiggle(freq,amp);
  [value[0],value[1],w[2]]

  and with sliders on a null named “freq” and “amp”:

  freq = thisComp.layer(“Null 1”).effect(“freq”)(“Slider”);
  amp = thisComp.layer(“Null 1”).effect(“amp”)(“Slider”);
  w = wiggle(freq,amp);
  [value[0],value[1],w[2]]

  or for a different wiggle for x,y and z, this:

  xFreq = 7;
  xAmp = 50;
  yFreq = 3;
  yAmp = 100;
  zFreq = 20;
  zAmp = 30;

  wX = wiggle(xFreq,xAmp);
  wY = wiggle(yFreq,yAmp);
  wZ = wiggle(zFreq,zAmp);
  [wX[0],wY[1],wZ[2]]

  To connect these for sliders:
  Layer>New>Null Object
  then on the Null
  Effect>Expression Controls>Slider Control
  then select the “Slider Control” in the Effect Window, hit “Enter” and rename, “xFreq”,
  select the “7” in the position expression (timeline window) then pickwhip (little box in the middle, looks like an “@” below the now red position numbers, drag it) to the Slider (“xFreq”) stopwatch. to get that line of the expression changed to;

  xFreq = thisComp.layer(“Null 1”).effect(“xFREQ”)(“Slider”);

  now the slider controls the xFrequency, 0 means no wiggle, so you can turn it on or off with keyframes on the slider.

  Have fun.

Reply to this Discussion! Login or Sign Up