Hey, I got a simple expression on the lenght of a polyextrude So it's linked to time:

if($F>20,($F-20)*0.1,0)

works fine.

Thing is I wanna make it stop when it reaches frame 30. I've tried if($F>20<30,($F-20)*0.1,0) and other combinations but nothing gives the desired result.

I tried clamping as well with no luck. any ideas?

cheers!

this expression might works:
if(($F>20)&&($F<30),($F-20)*0.1,0)
The sign && indicates is the equivalent of “and” in English terms, so it will be true only if the frame number is greter than 20 and less than 30.

Nice! Very c++. But it just reverts to 0 in lenght after 30 frames.

I found an other solution: clamp.

clamp(($F-20)*0.1,0,1)

Cheers!