• Adobe After Effects

  Mute all ‘Y’ axis movement on keyframed animation

  Posted by Moog Gravett on January 8, 2013 at 7:09 pm

  Hi folks,

  got another problem that maybe you can help on.

  I have an animation of an object with a large number of keyframes on it to animate. I’ve now decided that the movement in the Y-axis is to great and would like to lessen it.

  Is there some way to select all my keyframes and tell them only to use a percentage of their value in an overall way, rather than editing each keyframe?

  cheers

  Moog

  +++++++++++
  Freelance | Video Editor | After Effects | Camerawork

  http://www.Peculiana.com
  +++++++++++

  Vishesh Arora replied 13 years, 4 months ago 4 Members · 4 Replies
• 4 Replies

• 

  Vishesh Arora

  January 8, 2013 at 7:47 pm

  Moog

  Select your Position attribute and Alt + Click on it to add expression:

  [value[0],value[1]/2]

  instead of “2” you can add any value(make sure its not too big). It may help.

  Vishesh Arora
  3D and Motion Graphics Artist
  Films Rajendra

  Blog:
  https://digieffects.wordpress.com

  Demo Reel(3D):
  https://www.youtube.com/watch?v=lHPgIJU_BR8
• 

  Walter Soyka

  January 8, 2013 at 9:16 pm

  Nice, Vishesh.

  I might suggest an enhancement.

  First, add a null object, and name it Anchor. We will use as the anchor point around which to scale motion in Y (rather than the [0,0] origin).

  Next, add a slider control to the layer we need to dampen, rename it posYScale, and set it for now to 1.

  Alt-click the position stopwatch for the layer to dampen, and enter the following:
  [value[0], thisComp.layer("Anchor").transform.position[1]+(value[1]-thisComp.layer("Anchor").transform.position[1])*effect("posYScale")("Slider")]
  This expression will return X untouched, and return the scaled Y value around our anchor point.

  Setting posYScale to 0.5 will halve the Y; setting it to 2 will double it. Moving our Anchor null will change the origin for that transformation. Both can be animated.

  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
• 

  Darby Edelen

  January 9, 2013 at 6:13 am

  Both of the provided solutions work, but I’ll offer a third anyway!

  1. Copy the layer’s scale
  2. Create a new null
  3. Parent the layer to the null
  4. Unlink the XY dimensions on the null’s scale property
  5. With both the null and the layer selected, scale the null down in the y dimension only
  6. Unparent the layer and paste its scale back to the pre-parented value

  The disadvantage here is that it’s a one way street, but you can re-parent it to the null and make further adjustments if necessary. The advantage is that it shows you the motion path live while you change the scale of the parent null and it doesn’t involve any expressions.

  Additionally, you can move the null to a new location before parenting the layer to it and scale toward a different point in the composition. The null essentially works as the anchor point for the motion path’s scaling.

  Darby Edelen
• 

  Vishesh Arora

  January 9, 2013 at 8:33 am

  Great Walter!

  An enhanced version of mini expression 😀

  Vishesh Arora
  3D and Motion Graphics Artist
  Films Rajendra

  Blog:
  https://digieffects.wordpress.com

  Demo Reel(3D):
  https://www.youtube.com/watch?v=lHPgIJU_BR8

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