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Activity Forums Adobe After Effects animate wiggle – after effects expression changes?

  • animate wiggle – after effects expression changes?

    Posted by Greg Beninger on April 23, 2008 at 8:03 pm

    Hi guys, thanks ahead of time for helping me out. I’m trying to vibrate a still image on top of a still background; roller-coaster shot. I want to wiggle the coaster slightly and then ramp the wiggle to a more violent and dramatic shake. How can I accomplish this? Do I need to add additional values to the wiggle expression wiggle(frequency,variation)?

    Thanks.

    greg

    ae cs3
    mac osx 10.4.11

    Federico Rivolta replied 10 years, 5 months ago 3 Members · 3 Replies
  • 3 Replies
  • David Franklin

    April 23, 2008 at 9:12 pm

    Well, one way would be to set up a slider. Select the layer you’re trying to wiggle. Then select Effects > Expression Controls > Slider Control.

    This should add an effect to the layer called slider control. Twirl this open so you can see the variable “slider”.

    Then in the expression where your wiggle lives (I’m guessing you’re applying it to the layer’s position), make a variable on the first line of the expression.

    Write “amount=” then pickwhip to the “slider” variable in the slider control you just set up. Then type a semi-colon.

    On the second line of the expression you put your wiggle, except you use your new variable, “amount,” as the second value in the wiggle. So the wiggle would look like this: “wiggle(10,amount);”

    Now turn on the stopwatch for the “slider” variable inside the slider control effect and you can keyframe the amount of wiggle.

    You could do the same thing for the frequency, but that would require two slider controls.

    Hope this helps.

    –David

  • Greg Beninger

    April 23, 2008 at 9:36 pm

    Thanks David!!!

    Looks great!

    greg

  • Federico Rivolta

    November 26, 2015 at 12:22 pm

    Great David, It was useful to me too 🙂 Thanks

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