Creative Communities of the World Forums

The peer to peer support community for media production professionals.

Activity Forums Adobe After Effects Expressions Wiggle between two exact values

  • Wiggle between two exact values

    Posted by Mario Mendez on November 2, 2006 at 5:42 pm

    How could I go about wiggling between two exact values. I want to create a sort of strobe effect by wiggling the opacity of a layer but I only want to wiggle between 0 and 100. I do not want to see any of the transparent middle values. Anyone have any ideas?

    Thanks.

    Editors save hundreds of Hollywood jobs every week.

    Mike Clasby replied 19 years, 6 months ago 4 Members · 4 Replies
  • 4 Replies
  • Julian Sixx

    November 2, 2006 at 5:46 pm

    Hi

    //start
    blinkSpeed =2;
    lowOpacity =0;
    highOpacity = 100;
    if(Math.sin(blinkSpeed * time * Math.PI *2) < 0) lowOpacity else highOpacity; //end

  • Dan Ebberts

    November 2, 2006 at 6:02 pm

    Or, if you want the randomness of wiggle, you could set opacity to 50 and then use an expression like this:

    if (wiggle(3,50) < 50) 0 else 100 Dan

  • Mario Mendez

    November 2, 2006 at 6:15 pm

    Thanks it works well.

    Editors save hundreds of Hollywood jobs every week.

  • Mike Clasby

    November 2, 2006 at 6:39 pm

    Thanks, Dan, very handy for us random-types.

We use anonymous cookies to give you the best experience we can.
Our Privacy policy | GDPR Policy