How To "swap layers"

dand9959 wrote on 3/15/2005, 11:27 AM

Imagine that you have two objects, ovals, say, on the screen. Oval A overlaps Oval B. Also imagine video playing within each oval. (I'm using a parent-child track pair for each oval, using the oval as a mask over the video.)

The effect I'd like is to transition the two so that Oval B "rises" to the top and eventually overlaps Oval A. A position swap, in other words.

How would you accomplish this? Would I just use a transition element between the two mask (oval) tracks ?

Comments

Jessariah67 wrote on 3/15/2005, 11:31 AM

Put the oval B set above the Oval A set and use track motion to go from "off screen - bottom" to rise up over and "cover" Oval A.

If only the vide is changing, then just do a transition between the two videos on the child lone. (linear wipe or pus, depending on the effect you want)

dand9959 wrote on 3/15/2005, 12:27 PM

Both ovals (with their video) are visible at all times...they don't change position on the screen. Rather, they remain in place and but switch from "oval A partially obscuring oval B" to "oval B partially obscuring oval A".
Imagine view two pistons from atop as they rise and lower out of phase with each other. Now picture them overlapping one another as they do this.

Liam_Vegas wrote on 3/15/2005, 1:10 PM

A quick thought (as long as you have V5)... use 3-D track motion to accomplish this.