David Torno continues his look at various Expressions in After Effects with a great post on having a layered center itself between two moving layers while animating. Check out the post How to Auto Center A Layer in After Effects Between Two Moving Layers Using Expressions here.
David Torno writes: Ever have the need to have a layer stay exactly at the midpoint between two other moving layers? Sometimes your layers have to move erratically, or even linear, but you just want your midpoint layer to just stay in the middle without doing math and hand keyframing it the whole way. Well, this expression should help you out. Includes a 2D and 3D layer explanation.
