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Bacteria -animating position at fixed intervals with not so fixed values
Hi,
I need an expression as the one posted in “animating position at fixed intervals with fixed values” but with a bit of randomness in position values: moving a layer about 5 points up, pause for 2 seconds, up again and so on.
This is the expression Dan wrote:moveTime = .3;
holdTime = 4.7;
delta = [0,-5];seg = Math.floor(time/(moveTime+holdTime));
t = time % (moveTime+holdTime);
value + delta*seg + linear(t,holdTime,holdTime+moveTime,0,delta)I’d like to add some randomness to the position value (-5), but if I put a random number there (delta=[0,random(-4,-6)]) the randomness is increasing over time and the layer is not fixed during holdTime.
Any idea?
thanks in advance
Corrado Carlevaro -
2 Replies
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Try it this way:
moveTime = .3;
holdTime = 4.7;
minDelta = [0,-4];
maxDelta = [0,-6];seg = Math.floor(time/(moveTime+holdTime));
seedRandom(index,true);
prevDelta = [0,0];
for (i = 0; i < seg; i++) prevDelta += random(minDelta,maxDelta);
delta = random(minDelta,maxDelta);
t = time % (moveTime+holdTime);
value + prevDelta + linear(t,holdTime,holdTime+moveTime,0,delta)Dan
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Great, and just after one hour!
Corrado Carlevaro
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