• Adobe After Effects Expressions

  how to reset a value at a certain time

  Posted by John Ord on July 22, 2010 at 4:58 pm

  Hi guys, i have a bit of a quandry herei wonder if you could help me.

  i have a null object that starts off +3000 on the z axis.
  It the uses time to increment the z position coming toward the camera.
  Once it reaches +3000 i wish to reset the z position to -3000 and let the loop begin again.

  It works fine however when it gets over -3000, it resets to 3000 and stays there.

  i have attached my code, any help would be great.

  cheers
  chris

  t=time;
a= thisComp.layer("Null").position[0];
b= thisComp.layer("Null").position[1];
c= thisComp.layer("Null").position[2]-(t*500);

  if(c <= -3000) {
c=3000;
t=0;
}
[a,b,c]

  John Ord replied 15 years, 10 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  July 22, 2010 at 5:33 pm

  something like this should work:

  value – [0,0,(time*500)%6000]

  Dan
• 

  John Ord

  July 22, 2010 at 5:36 pm

  Ah, brilliant you sir, are a gent

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