• Adobe After Effects Expressions

  displaying multiple images

  Posted by Amit Zinman on September 5, 2008 at 4:11 pm

  Hi,
  I have 400 employee pictures that I need to display in 3 minutes.
  my plan is:
  1. Line all of them together
  2. Use the index value to display 3 pictures every second, by adjusting the scale property from 0 to 100 and than back to 0.

  Problem is, I am a bit weak on the math side and I need help calculating this.

  Amit

  Dan Ebberts

  

  replied 17 years, 7 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Dan Ebberts

  September 5, 2008 at 5:26 pm

  It seems like the easiest way would be to trim all the layers to the desired length, use Animation > Keyframe Assistant > Sequence Layers to arrange them end-to-end on the timeline and apply this scale expression:

  scaleTime = .1;

  if (time < ((outPoint - inPoint)/2 + inPoint)){ ease(time, inPoint, inPoint + scaleTime, [0,0], [100,100]) }else{ ease(time, outPoint - scaleTime, outPoint, [100,100], [0,0]) } Dan
• 

  Amit Zinman

  September 15, 2008 at 3:07 pm

  seedRandom(index,true);
  r = thisComp.layer("Null 3").effect("randomize length")("Slider")
  y = random(-r,r);
  ease(time, inPoint,outPoint, [-300 + y,y, (index/2)], [300+y,y,(index/2)]) 
  
  

  Below is the expression I ended up using for the Position.
  Problem is the I get too much overlapping of pictures.
  I’m thinking of reducing the X by some measure if it’s and odd index number and increasing it by X if it’s an even one.
  Can you help me with math?
• 

  Dan Ebberts

  September 15, 2008 at 3:17 pm

  Like this:

  if (index%2){

  // odd index code goes here

  }else{

  // even index code goes here

  }

  Dan

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