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Effecting Scale values of an object or multiple objects with a ramp.

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Jordan Montreuil
Effecting Scale values of an object or multiple objects with a ramp.
on Feb 9, 2012 at 6:43:43 pm

I am looking for a way to incorporate the ideas of Cinema 4D's Effectors. I would like to be able to use a ramp layer to drive values of other objects, be it Position, Scale, Rotation, etc. Maybe I can plug the 0-255 white values of a ramp into the values of the other objects?

For Example:

Have a group of objects with that scale up from 35-85% as a hidden ramp animates in space underneath them.

Is there a way to do this?


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Walter Soyka
Re: Effecting Scale values of an object or multiple objects with a ramp.
on Feb 9, 2012 at 7:20:31 pm

Yes, you could, via expressions. You'd use sampleImage() to read the ramp, and interpolation functions like linear() and ease() to map its output values to your animation input values.

I think there are better (and faster-to-render) ways, though. You could build your own rigs using the controls found in Expression Controls. You can link parameters directly very easily with the pickwhip [link], or again, you can use more involved expressions.

Here are a couple good resources to get you going with expressions:

http://www.motionscript.com/

http://www.jjgifford.com/expressions/basics/index.html

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
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Roland R. Kahlenberg
Re: Effecting Scale values of an object or multiple objects with a ramp.
on Feb 9, 2012 at 7:26:06 pm

The sampleImage Expression will do this quite nicely. There are a few examples at the COW's AE Expressions Forum. Search for sampleImage and go through the results.

HTH
RoRK

Intensive AE & Mocha Training in Singapore and Malaysia
Adobe ACE/ACI (version 7) & Imagineer Systems Inc Approved Mocha Trainer


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