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Xpression to "wiggle" a value around its timeline animation

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Ryan Paterson
Xpression to "wiggle" a value around its timeline animation
on Jan 7, 2015 at 8:12:24 pm

I'm using the Noise node, but how to I hook it up to be a "relative" value, rather than absolute? So my object still follows its timeline animation but with an added degree of randomness... know what I mean?


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Tim Shetz
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 12:03:48 am

Could you use the Vibrate tag instead?

__________

Tim Shetz
c4dtraining.com


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Ryan Paterson
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 12:55:19 am

For the intensity of a light? Any ideas on how to do that off the top of your head? I feel like I've done something similar in the past but I'm curious as to your thoughts


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Tim Shetz
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 1:54:28 am

From your original post I assumed an object moving along a path and you wanted it to not be so static.

"So my object still follows its timeline animation but with an added degree of randomness"

Guess I read too much into it.

I think using noise in Xpresso is probably the best. So you have a light that animates, but you want to add a little flicker to it?

__________

Tim Shetz
c4dtraining.com


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Ryan Paterson
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 1:57:08 am

yes, precisely


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Ryan Paterson
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 1:57:42 am

Actually you know what I just figured it out


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Ryan Paterson
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 1:58:47 am

Wait... no I didn't :\


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Brian Jones
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 2:23:00 am

here's an xpresso that does what a Vibrate tag does (for position in this case) and the same math (more or less) to 'vibrate' the intensity of a light. Volumetric so it's easier to see...

8382_vibratekeyframedanim.c4d.zip


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Tim Shetz
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 2:28:49 am

Thanks Brian!

I was fiddling around and was sort of getting to what you have there, but hadn't gotten to the clamp quite yet.

__________

Tim Shetz
c4dtraining.com


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Brian Jones
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 2:35:47 am

as long as you want to limit the light to standard values of course... take it out to leave the possibility of negative values or values over 100% and associated 'bloom' etc. No problem.


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Ryan Paterson
Re: Xpression to "wiggle" a value around its timeline animation
on Jan 8, 2015 at 8:05:34 pm

Very nice! The clamp is what I was missing actually. I also didn't realize the intensity values were a range from 0-1, good to know!


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