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Random Scale Expression

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Tommaso Rota
Random Scale Expression
on Oct 11, 2012 at 1:03:14 pm

Hi everyone, i'm Tommy nice to meet you i'm new to this world of expressions.
I need an expression that would randomly scale my object (choosing between 5 values) over a random period of time.
I managed to make it scale randomly between 10% and 100%, but what I need to do is a random scale of the object to 10% OR 20% OR 30% OR 40% OR 50%.
I hope that was clear enough.
Thank you

seg_start_time = 0;
seg_end_time = 0;
i =1;
tmin = 2;
tmax = 8;
while (time >= seg_end_time){
i = i+1; seed_random(i,true);
seg_start_time = seg_end_time;
seg_end_time = seg_end_time + random(tmin,tmax);
}
percent = (time - seg_start_time)/(seg_end_time - seg_start_time);
s = random(10, 100);
seed_random(i-1,true);
x=random();
old_s = random(10, 100);
ease(percent,[old_s],[s]);
[s,s]


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Dan Ebberts
Re: Random Scale Expression
on Oct 11, 2012 at 1:35:00 pm

I'd do it like this:


minDur = 2;
maxDur = 8;

seedRandom(index,true);
prev = next = inPoint;
while (time >= next){
prev = next;
next += random(minDur,maxDur);
}
seedRandom(prev,true);
s = (Math.floor(random(5))+1)*10;
[s,s]



Dan



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Tommaso Rota
Re: Random Scale Expression
on Oct 11, 2012 at 2:06:04 pm

thank you dan!!! it works perfectly!!
now i'd just like the size to change gradually and not to jump directly.
i mean, if it goes for example from 20% to 40%, i'd like the size not to jump but to gradually (rapidly though) change from 20% to 40%
can this be done?
thanks a lot!!


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Dan Ebberts
Re: Random Scale Expression
on Oct 11, 2012 at 2:14:32 pm

More like this then:


minDur = 2;
maxDur = 8;
tRamp = .25;

seedRandom(index,true);
prev = next = inPoint;
while (time >= next){
prev = next;
next += random(minDur,maxDur);
}
seedRandom(prev,true);
sPrev = (Math.floor(random(5))+1)*10;
seedRandom(next,true);
sNext = (Math.floor(random(5))+1)*10;
ease(time,next-tRamp,next,[sPrev,sPrev],[sNext,sNext])



Dan



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Tommaso Rota
Re: Random Scale Expression
on Oct 11, 2012 at 2:18:19 pm

thanks a lot mate, you're my hero!!!!


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