Apple Motion 3 - Manual (Page 425)

Chapter 5 Using Behaviors 425
Invert Axis: If the object is aligning on the correct axis, but appears backwards, this
checkbox flips the object so that it faces the proper direction.
Snap Alignment to Motion
This behavior aligns the rotation of an object to match all changes made to its position
along an animation path. This behavior is meant to be combined with behaviors that
animate the position of an object, or with a keyframed animation path you create
yourself.
For example, if you have a graphic of a fish to which you’ve applied the Motion Path
behavior, you can add the Snap Alignment to Motion behavior to make the fish point
in the direction it is moving.
HUD Control
The HUD has a pop-up menu to control the axis around which the object is rotated, a
pop-up menu to control the axis used to adjust the object’s alignment, and a checkbox
to let you invert the axis.
Parameters in the Inspector
Rotation Axis: A pop-up menu that lets you rotate the object around the X, Y, or Z axis.
You can also choose All to rotate the object around all three axes. The default rotation
axis is Z. All uses the acceleration direction as “up,” like a roller coaster.
Axis: A pop-up menu that lets you specify whether the object aligns itself on its
horizontal or vertical axis.
Invert Axis: If the object is aligning on the correct axis, but appears backwards, this
checkbox flips the object so that it faces the proper direction.
Before After, with Snap Alignment to Motion applied
to arrow