6 Replies Latest reply on May 22, 2012 9:02 AM by Dan Jacobsen

# How do I fix an axis on a moving object?

Hey folks,

Imagine I have a thin layer that is swinging from its top edge. Like a slat of a blind hanging down and swinging.

How could I attach a 2nd layer to the bottom edge? I guess a realistic physics model is impossible with all the momentum and stuff, but can it be done on some level?

I saw some clip where someone had done this with a few slats attached vertically. I had assumed it was AE but maybe not?

Cheers

• ###### 1. Re: How do I fix an axis on a moving object?

Look up parenting in the help. It will blow your mind.

• ###### 2. Re: How do I fix an axis on a moving object?

Hi, I use parenting all the time. I'm not sure how it could help with my situation though. The 2nd slat need to move independently of the first but as if it were connected with a hinge. Does that make sense?

Imagine 3 sheets of cardboard taped together on the edges and hanging down. Oh I can't think how to discribe it. Like that kids toy, a Jacob's Ladder I think it's called.

• ###### 3. Re: How do I fix an axis on a moving object?

Ok, this is what I'm trying to say. top slat is swinging with an axis on its top edge. Middle slat is swinging at a different rate with its axis attached to the top slat. And so on.

Any ideas?

• ###### 4. Re: How do I fix an axis on a moving object?

Still parenting, but you'd need to use an expression on the rotation to get it to swing the way you want with decay.

• ###### 5. Re: How do I fix an axis on a moving object?

Forgot to mention that you would (of course) have to move the anchor point for the layer up to the edge you plan to attach.

• ###### 6. Re: How do I fix an axis on a moving object?

Oh my god. Of course. Sorry, being really dense there. I didn't think for a moment the 2nd slat would 'stick' to the correct edge. but it follows the plane that the first is on of course.

I really did think something clever was going on there.

Thanks for the help.