• Adobe After Effects

  Opacity expreccion malarky

  Posted by Moog Gravett on August 11, 2006 at 3:23 pm

  Hi folks…

  right – who knows their expresion onions then?

  I want to add something to an expression to fade an item out after being visible on screen.

  I have a ‘holdtime’ parameter set up, and would like to have the fade correspond to this.

  So for example I want to have an item onscreen for 1 second and have if fade over .1 of a second, then if I change the hold time to 2 seconds and have the fade time adjust itself to .2

  What would be extra special too, was if I could set an upper and lower limit to the potential fade.

  WHOS WITH ME!!!! 😉

  cheers guys 🙂

  moog

  Dan Ebberts

  

  replied 19 years, 9 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Dan Ebberts

  August 11, 2006 at 4:07 pm

  Something like this maybe:

  holdTime = 2;

  minFade = .1;
  maxFade = .5

  fade = Math.min(Math.max(minFade,holdTime*.1),maxFade);

  linear(time,holdTime,holdTime + fade,100,0);

  Dan

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