• Adobe After Effects

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

  Posted by Jordan Montreuil on February 9, 2012 at 6:43 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?

  Roland R. kahlenberg replied 14 years, 2 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Walter Soyka

  February 9, 2012 at 7:20 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:

  https://www.motionscript.com/

  https://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
  Creative Cow Forum Host: Live & Stage Events
• 

  Roland R. kahlenberg

  February 9, 2012 at 7:26 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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