• Adobe After Effects Expressions

  random number stable in time

  Posted by Taha Boukhari on June 28, 2013 at 1:34 am

  hi
  im searching an expression that can help me to give to parameters a random value ( i want a value betwen to numebers for parameters to be stable in time) not like random () expression because it s change in time and i want a stable one when the i play my comp .

  Dan Ebberts replied 13 years, 1 month ago 2 Members · 3 Replies
• 3 Replies

• 

  Dan Ebberts

  June 28, 2013 at 4:14 am

  Just precede your random() with seedRandom() with the timeless parameter set to true like this:

  seedRandom(index,true);
  random()

  Dan
• 

  Taha Boukhari

  June 28, 2013 at 10:30 pm

  Thank you some much ,you save me
  but can you give me explanation a bout the seedrandom and true and index trick that you have than.
  because i now what’s mean all what you have than but i dont now whats the combination betwen them mean
• 

  Dan Ebberts

  June 29, 2013 at 12:05 am

  When you set the seedRandom() timeless parameter to true, random() will generate the same random numbers at each frame. I use index as the seed mostly out of habit because it’s a seed that’s unique for each layer. You could actually stick any number in there. Changing the seed changes the results you get.

  Dan

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