A pulsing wiggle?

[Anders Hattne]

this is not a solution but hey, I’d love to know how to do this too..
I’ve spent > half an hour trying to figure that out but to no avail.
This is my attempt (well modified to work in a text layer that way I can see what numbers I get, once that works, I figured I’d paste it into a solid..)
It’s late and it’s been a long week…

var start=0;
wigg=0;
pos=transform.position;
duration=thisComp.frameDuration*effect("Slider Control")("Slider");
if (time%6==0) {start=duration;

if (start>0)
{

wigg=ease(time,time,time+start,100,0);
start=start-thisComp.frameDuration;

}}

start+"+"+wigg+"+"+duration

The problem is it won’t go into the second if part. I’m really currious to know how you solve that.. Start goes straight to zero, no slow decline as I had hoped, and start–; doesn’t work either..
If someone could enlighten me.. I’d be.. happier!
Thanks!
(I’ve figured out that a problem is that start is given the value 0 at the beginning, but if I don’t define it I get an error message too..)

http://www.ardillamedia.com

[Dan Ebberts]

Something like this, I think:


minDelay = 2.5;
maxDelay = 3.5;
minDur = .75;
maxDur = 1.25;

wigFreq = 12;
wigAmp = 50;

t1 = inPoint;
seedRandom(index,true);
delay = 0;
while (t1 <= time){
delay = random(minDelay,maxDelay);
t1 += delay;
}
t1 -= delay;
seedRandom(t1,true);
dur = random(minDur,maxDur);
t2 = t1 + dur

if (time < (t1+t2)/2)
easeIn(time,t1,t2,value,wiggle(wigFreq,wigAmp))
else
easeOut(time,t1,t2,wiggle(wigFreq,wigAmp),value);


Dan

[Dan Ebberts]

This is better for a couple of reasons. For one thing, it has a delay at the start, so the random wiggle doesn’t always start at the layer’s In Point.


minDelay = 1.5;
maxDelay = 2.5;
minDur = .75;
maxDur = 1.25;
fadeTime = .1;

wigFreq = 12;
wigAmp = 50;

seedRandom(index,true);
t0 = inPoint;
t1 = t0 + random(maxDelay);
t2 = t1 + random(minDur,maxDur);

while(t2 < time){
t0 = t2;
t1 = t0 + random(minDelay,maxDelay);
t2 = t1 + random(minDur,maxDur);
}

if (time < (t1+t2)/2)
linear(time,t1,t1+fadeTime,value,wiggle(wigFreq,wigAmp))
else
linear(time,t2-fadeTime,t2,wiggle(wigFreq,wigAmp),value);


Dan

[Anders Hattne]

Wow, that works..
It will take a while until I can get my head round that expression. I guess I have to ditch my approach of assigning a value to a variable and while that variable decreases make the layer wiggle.
it’s all part of the learning curve..

http://www.ardillamedia.com