Apple Motion 3 - Manual (Page 493)

Chapter 5 Using Behaviors 493
To use the Vortex behavior:
1 Using the result of the previous example, delete the Orbit Around behavior from the
project.
2 Option-drag the “center circle” layer to the “orangeCircles” group in the Layers list.
Note: If you want, rename the copied “center circle” layer. In this example, both layers
(original and copied) are named “center circle.”
3 Apply the Vortex behavior to the “center circle” layer in the group above the group of
circles.
By default, Related Objects is selected in the Vortex Affect parameter. When Related
Objects is selected, all objects that exist in the same group as the object to which the
behavior is applied move around that object. Because the circle is the only object in
the group, nothing happens.
4 In the Vortex HUD, choose All Objects from the Affect pop-up menu.