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Forums Adobe After Effects Expressions Random character opacity on and off

  • Random character opacity on and off

  • Navarro Parker

    July 31, 2012 at 11:14 pm

    Good to know. Thanks for the tip.

  • Adam Goddard

    August 5, 2015 at 12:55 am

    Hi Dan

    I am trying to get this expression to work on a text layer, applying the expression to the opacity animator. I am getting the following error message:

    property or method named ‘textindex’ in Class ‘global’ is missing or does not exist…

    Can you please help solve this?

    Many thanks
    Adam.

  • Dan Ebberts

    August 5, 2015 at 1:12 am

    You must have missed the step where you add the Expression Selector. The Amount property of an Expression Selector is the only place where that expression won’t generate an error.

    Dan

  • Adam Goddard

    August 5, 2015 at 1:19 am

    ahhh quite correct. many thanks and apologies for missing that and not reading close enough.

    Adam

  • Gage Ullman

    January 9, 2017 at 10:23 pm

    This is fairly similar to something I’m trying to do and can’t seem to figure out… I’m trying to have the letters flicker on left to right, but with a degree of randomness. So, you know, if the letters are ABCDEFG, A flickers on and then maybe C starts, and then B and D go so on with a slight randomness until the word is completed. I thought I had it using one of your expressions from motionscript.com (random text overshoot), but I can’t seem to get the left-to-rightness of it to work. That make sense? Sorry to tack onto an old thread like this, I just haven’t been able to find quite the thing I’m looking for.

  • Caresse Singh

    January 27, 2017 at 3:27 am

    This is awesome, thanks! How could I get the amount of characters to randomly increase/decrease from left to right?

    i.e.:
    BFKFJB
    FDSNJKIKGGH
    CFD
    FGJHKGLKKLKKK;
    GSDGSGF

  • Ze’ev Gilad

    January 27, 2017 at 8:15 am

    I’m no Dan Ebberts, but I would add a second animator for Opacity, set Opacity to 0%, with End 100% and add an expression for Start to randomize or wiggle.

  • Mirra Fine

    February 23, 2017 at 8:20 pm

    Hey Dan — How could I change this expression so that the letters appear randomly and then stay (dont dissapear?)
    I want letters to appear at different times, but eventually for the whole word to be seen.

    Thanks!

    freq = 1;

    txt = text.sourceText;
    curMax = -999;
    for (i = 0; i < txt.length; i++){
    seedRandom(i,true);
    w = rotation.wiggle(freq,1);
    if (w > curMax){
    curMax = w;
    idx = i;
    }
    }
    textIndex == idx ? 0 : 100

  • Dan Ebberts

    February 23, 2017 at 8:29 pm

    Something like this might work:

    revealTime = 3; // reveal over 3 seconds
    seedRandom(textIndex,true);
    myReveal = random(revealTime);
    if ((time-inPoint) < myReveal) 100 else 0

    Dan

  • Mirra Fine

    February 23, 2017 at 8:30 pm

    Amazing. Thank you so much!

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