• Adobe After Effects Expressions

  rotating a clock based on time

  Posted by Martin Löfqvist on March 10, 2012 at 10:43 pm

  Hi,

  I’m trying to write a (simple I thought) code for rotating a clock, based on the actual time in the comp.
  I figured it would work like this.

  1) Have something constantly counting (variable i), in my example using timeToFrames
  2) Translate that to seconds, I used Math.floor(i/25) to get the current second (yeah the base is 25)
  3) see if the variable is equal to the variabel seconds.
  4) if so, rotate the pointer with 6 degrees.

  This didn’t quite work, I think because the condition only occurs on one frame.

  So I tried adding another counter, c. That would be set to 6 when i and seconds matched up.
  Then, as long as c was less or equal to 6 i would subtract it by 1 and rotate the layer by 1 degree.

  Sadly this didn’t work either. Anyone has any thoughts on how to solve this?

  rot = this.rotation;
i = timeToFrames(t = time + thisComp.displayStartTime, fps = 1.0 / thisComp.frameDuration, isDuration = false);
seconds = Math.floor(i/25);
if (i/25 == seconds) {
c = 6;
} else {
c = 0; }

  if (c <= 6) { 
c = -1;
transform.rotation = rot+1;
}

  Dan Ebberts replied 14 years, 2 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Dan Ebberts

  March 10, 2012 at 11:30 pm

  This should work:

  Math.floor(timeToFrames(time)/25)*6

  Actually, I think this should work as well:

  Math.floor(time)*6

  Dan

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