• Adobe After Effects Expressions

  Help tweaking an expression

  Posted by Michael Mazur on May 1, 2007 at 3:01 pm

  Here is the expression that I am using…

  amtOfDigits = 2;
  seconds = Math.round( time % 60 );
  minutes = Math.floor( time / 60 );
  function addLeadingZeroes( v ){
  for( i = 0; i < Math.abs( amtOfDigits - (v + "").length ); i++) v = "0" + v; return v; } addLeadingZeroes(minutes) + ":" + addLeadingZeroes(seconds) My only problem is that when I get to the 1:00 minute mark in the timeline the seconds count to :60 for a half second before switching over to 1:00. Obviously , I want the seconds to count from :59 to 1:00 directly. My comp setting is an HD 30fps set-up right now. Please help.

  Dan Ebberts replied 19 years ago 2 Members · 3 Replies
• 3 Replies

• 

  Dan Ebberts

  May 1, 2007 at 3:18 pm

  Try changing the second line to this:

  seconds = Math.floor( time % 60 );

  Dan
• 

  Michael Mazur

  May 1, 2007 at 4:10 pm

  Thanks so much man that was it. If you get a second can you explain to me why that fixed it?
  What is the difference between floor and round?

  Thanks again.
• 

  Dan Ebberts

  May 1, 2007 at 5:22 pm

  Math.round() rounds to the nearest integer value, which could be up or down, while Math.floor() always rounds down.

  Dan

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