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# Randomly freeze and skip value

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 Randomly freeze and skip value on Dec 30, 2013 at 9:41:46 pm

Dan Ebberts has helped me with something similar in the past: http://forums.creativecow.net/readpost/227/20569

What I'm trying to accomplish now is a little different. Any guidance you can give me is greatly appreciated. I am looking to randomly change a value on every frame, but it needs to occasionally and randomly freeze the value for a random amount of time, then continue on changing on every frame. I have four Slider Controls which I would like to use to control the boundaries of randomness:

Minimum Play Time
Maximum Play Time
Minimum Freeze Time
Maximum Freeze Time

Instead of on a Time Remapping effect, this expression would go on the "Evolution" parameter of a Fractal Noise Effect. I'd like to have the value range from -30,000 to 30,000.

So to sum up, during the "Play Time", the Evolution value would be changing every frame using a function like "random(-30000,30000)". It would do this for a random number of frames (determined by the "Play Time" slider controls). Then, it would hold (freeze) a value for a random number of frames (determined by the "Freeze Time" slider controls). Then it would just continue playing, then freezing, then playing, etc.

Thanks.

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 Re: Randomly freeze and skip valueon Dec 30, 2013 at 11:09:48 pm

Something like this should work:

``` if (time >= inPoint){ minPlay = .75; maxPlay = 1.5; minFreeze = .2; maxFreeze = .7; minVal = -30000; maxVal = 30000; t0 = inPoint; seg = -1; seedRandom(index,true); while (t0 <= time){ seg++; if (seg%2){ t0 += random(minFreeze,maxFreeze); }else{ t0 += random(minPlay,maxPlay); } } seedRandom(seg,seg%2); random(minVal,maxVal) }else value ```

Just attach the play and freeze min and max to sliders.

Dan