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Random motion at intervals > bounce at each interval
I’d like to combine Dan’s expression for Random motion at intervals with the Inertial Bounce expression found below. Instead of the bounce occurring at keyframes, I want them to occur at each new Random motion interval.
// Dan’s Random Motion at intervals expression
holdTime = .5; //time to hold each position (seconds)
minVal = [0.1*thisComp.width, 0.1*thisComp.height];
maxVal = [0.9*thisComp.width, 0.9*thisComp.height];seed = Math.floor(time/holdTime);
seedRandom(seed,true);
random(minVal,maxVal)// Inertial Bounce (moves settle into place after bouncing around a little)
n = 0;
if (numKeys > 0){
n = nearestKey(time).index;
if (key(n).time > time){
n–;
}
}
if (n == 0){
t = 0;
}else{
t = time – key(n).time;
}if (n > 0){
v = velocityAtTime(key(n).time – thisComp.frameDuration/10);
amp = .05;
freq = 4.0;
decay = 2.0;
value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t);
}else{
value;
} -
2 Replies
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Something like this maybe:
holdTime = .5; //time to hold each position (seconds)
t = time – Math.floor(time/holdTime)*holdTime;
minVal = [0.1*thisComp.width, 0.1*thisComp.height];
maxVal = [0.9*thisComp.width, 0.9*thisComp.height];seed = Math.floor(time/holdTime);
seedRandom(seed,true);
p1 = random(minVal,maxVal);seedRandom(seed-1,true);
p0 = random(minVal,maxVal);v = p1 – p0;
amp = .05;
freq = 4.0;
decay = 2.0;
p1 + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t);Dan
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Dan the man!
Dan, I can’t thank you enough. This is exactly what I was looking to accomplish! Thank you for your time and help!
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