• Adobe After Effects Expressions

  Expression for start time and duration

  Posted by Erik Fashingbauer on September 11, 2020 at 12:04 am

  Hi,

  I’m building a motion graphics template for a client that is a simple text typewriter effect.
  Basically for any given line of text I need an expression on the range selector that I can link to a slider control for duration of text typing on from 0-100 and a slider for start time so I can control when the typing animation begins.

  This expression time*100 works by itself to control the duration. I can link the value to a slider ultimately and it works fine.

  I used the following expression to determine start time.

   timeToStart = 2;
    if (time > timeToStart){
        wiggle(3,25);
    }else{
        value;
    }

  this works and the animation starts at 2 seconds. The problem is this expression wiggles the value which is not what I need so I replaced “wiggle(2,25)” with “time*100” but it doesn’t seem to work. I think because the word time is already defining start time, it can’t also be used to define duration maybe?

  Does anyone know how I can make this work??

  Erik Fashingbauer replied 5 years, 11 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Andrei Popa

  September 11, 2020 at 12:03 pm

  I think you should use this expression for the “Start” of the typewriter effect. You can link dur and timeToStart to your sliders

  timeToStart = 2;

  dur = 2;

  linear(time,timeToStart, timeToStart+dur,0,100)
• 

  Erik Fashingbauer

  September 22, 2020 at 8:26 am

  Yes.
  thank you! this worked great!

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