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Adding wiggle to an array
Hi Everyone,
I am using particular to create a stream of particles following a light named “Emitter” generated from c4d.
I have the below expression placed on the Position XY of my particular emitter so it follows the light called Emitter. I know there’s a setting for this in particular but I want more flexibility down the line.
posx = thisComp.layer(“Emitter”).transform.position[0];
posy = thisComp.layer(“Emitter”).transform.position[1];
[posx, posy];My question is: I want to now add a wiggle expression to both posx and posy separately. Everyway i try to do this, it forgets the array values generated by the (“Emitter’) coordinates and reverts back to its original coordinates.
All I want to do is ADD the wiggle value onto the x and y value being generated form the (“Emitter’) values.
I know I can do this with nulls but I want to contain it within this one expression so I can duplicate up the layer and each layer have random wiggle values.
Many thanks in advance.
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7 Replies
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if there is a reason you can’t add the wiggle to the light’s position, then you could just add it to the last line…
[posx, posy] + wiggle(5,30)
however, you’ll need to set the emitter’s xy position to 0,0…
or maybe you could do that in the expression:
[posx, posy] – value + wiggle(5,30)
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Thanks for the reply.
Yeah I can’t put the wiggle on the light as I want to keep that a constant value and run multiple particular layers from it, that are then randomly wiggled. So the effect would be multiple particular light streaks with random wobbles away from the lights path.
Does that make sense? Would your expression work for that?
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[David Wiffen] “Would your expression work for that?”
yep, they should… reply back if it doesn’t work as expected.
also, if you needed the same expression on z position, adding -value+wiggle() in a similar way should work.
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Great thanks, I’ll have a go when I’m back at work on Monday 🙂
Thanks for your help!
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You can get a wiggled version of the light’s position from within the Particular layer’s xy property like this:
thisComp.layer(“Emitter”).transform.position.wiggle(1,50)
and the result will be different for each Particular layer. I’m not sure if that does everything you need because of your requirement to split the dimensions though.
Dan
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Thanks Kevin,
-value+wiggle() worked a treat!
Would there be a way to separate the x and y values? i.e. so if I wanted to wiggle the y more?
here’s the expression as it stands – the wiggle is attached to a sliders etc…
posx = thisComp.layer(“Emitter”).transform.position[0];
posy = thisComp.layer(“Emitter”).transform.position[1];
[posx, posy] – value + wiggle(thisComp.layer(“Wiggle1”).effect(“Freq”)(“Slider”),thisComp.layer(“Wiggle1”).effect(“Amp”)(“Slider”));Any help much appreciated
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Sorry Dan, only just saw this post. Yes this works great to separate up the x and y.
Thanks!
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