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Expression for random stop, hold, continue
Trying to create an expression to wiggle a non-linear progress.
Think a Photoshop “Save” progress bar filling (it pauses every once in a while, then goes again, then pauses, sometimes the progress is slower etc.)
or ye olde Text Animator for Typewriter, where I want the typing to have some pauses and stops.
Seems like this expression wiggles only one way as the progress only moves towards the 100%
Ideally the frequency and duration of pauses will be able to be controlled by a slider if needed.Thank you!
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4 Replies
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Maybe some variation of this:
minPeriod = 0.1;
maxPeriod = 0.6;
minVal = 0;
maxVal = 10;
accum = accumPrev = 0;
t = tPrev = 0;
seedRandom(index,true);
while(t <= time){
tPrev = t;
accumPrev = accum;
accum += random(minVal,maxVal);
t += random(minPeriod,maxPeriod);
}
linear(time,tPrev,t,accumPrev,accum)
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Thanks Dan, this works great for the typewriter effects when applied to the text animator.
Trying to apply this to a linear wipe, but the wipe goes the opposite way (starts full all wipes down) -
You probably just need to adjust a couple of lines:
minPeriod = 0.1;
maxPeriod = 0.6;
minVal = 0;
maxVal = 10;
accum = accumPrev = 100;
t = tPrev = 0;
seedRandom(index,true);
while(t <= time){
tPrev = t;
accumPrev = accum;
accum -= random(minVal,maxVal);
t += random(minPeriod,maxPeriod);
}
linear(time,tPrev,t,accumPrev,accum)
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Thank you thank you. This is perfect
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