FORUMS: list search recent posts

Parented rotation, but remaining 'upright'

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Eric Chard
Parented rotation, but remaining 'upright'
on Aug 13, 2012 at 12:42:24 am

I want to have 4 layers parented to a null that's rotating in the Z axis (think 'Ferris wheel'),but I'd like each of the children to remain 'upright' -- that is, like a Ferris wheel, the 'cars' stay upright and vertical.

I know this will involve expressions, but what expressions?

THANKS!

++++++++++++++++
"Putting the HARM in 'harmonica' since 2005."
++++++++++++++++


Return to posts index

John Cuevas
Re: Parented rotation, but remaining 'upright'
on Aug 13, 2012 at 1:31:35 am

Parent your layers to the null & open up the rotation properties of both the layers and the null. Alt-click the layer and pick whip to the nulls rotation, then just put a -(minus sign) in front of the expression.

It should look something like this:

-thisComp.layer("Null 1").transform.rotation

Johnny Cuevas, Editor
Thinkck.com

"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.


Return to posts index

Vishesh Arora
Re: Parented rotation, but remaining 'upright'
on Aug 13, 2012 at 1:52:21 pm

Nice tip Mr. Cuevas. I myself tried many times to get the result but never found any. NOw I got it.

I am a keen learner and am very keen on pursuing a career in the animation industry. My artistic skills are mostly self-
taught. I have a deep knowledge base of Photoshop, Maya, Adobe Premiere, After Effects, Final Cut Pro and Sony Vegas.


Return to posts index


Vishesh Arora
Re: Parented rotation, but remaining 'upright'
on Aug 13, 2012 at 1:59:01 pm

Nice tip Mr. Cuevas. I tried many times to get the result but never found any but now got to know how easy it is to make.

I am a keen learner and am very keen on pursuing a career in the animation industry. My artistic skills are mostly self-
taught. I have a deep knowledge base of Photoshop, Maya, Adobe Premiere, After Effects, Final Cut Pro and Sony Vegas.


Return to posts index

Eric Chard
Re: Parented rotation, but remaining 'upright'
on Aug 13, 2012 at 4:32:09 pm

Thanks John, excellently explained.

++++++++++++++++
"Putting the HARM in 'harmonica' since 2005."
++++++++++++++++


Return to posts index

Eric Chard
Re: Parented rotation, but remaining 'upright'
on Aug 13, 2012 at 10:33:54 pm

Dang: works on one layer, fails on nearly identical.

So, using the AE expression:
loopOut(type="continue");

On two nearly identical channels, it works fine on one, and fails on the other, using the SAME cut&paste text.

I'm very puzzled by this: maybe 'cuz it's a negative value????


++++++++++++++++
"Putting the HARM in 'harmonica' since 2005."
++++++++++++++++


Return to posts index


Walter Soyka
Re: Parented rotation, but remaining 'upright'
on Aug 14, 2012 at 2:40:47 am

The negative value is not the thing that's making it not work.

I notice that you've got a keyframe on the same frame at the CTI on both layers in the image, but they have different keyframing at their beginnings. Is that intentional, or should that last keyframe be slid back some on one layer so the duration of tie between the last two keyframes on each layer is identical?

If that's not the problem, can you explain what the comp is doing now and what you expect it o do instead?

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


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]