5.1.1

Chapter 22 Motion tracking 970
8 From the Action pop-up menu at the right of the Source well (the gear icon), choose the Analyze
Motion track.
Doing this applies the Analyze Motion tracking data recorded in step 6 to the Match
Move behavior.
9 Choose Four Corners from the Type pop-up menu in the HUD or Behaviors Inspector.
The four-point tracking data from the Analyze Motion behavior is applied to the
foreground object.
Note: When using the Match Move behavior for four-point tracking, the trackers are placed in
the correct order (clockwise from the top left) in the Canvas after Four Corner is chosen from
the Type pop-up menu in the Behaviors Inspector. If you’ve used more than four trackers or you
need to change the order of the trackers, choose a dierent order from the Top Left, Top Right,
Bottom Right, or Bottom Left pop-up menus.
About destination object animation
You can use the Match Move behavior to apply the movement of a source object to a destination
object. When a destination object has no animation of its own, it precisely follows the motion of
the source object. However, if the destination object is animated (has its own applied behaviors
or keyframes), more complicated motion eects can be achieved by combining motion paths.
You can specify whether the animation of the destination object is ignored by or added to the
Match Move behavior. You do this in the Match Move Behaviors Inspector, by choosing one of
two options from the Transform pop-up menu: Attach to Source or Mimic Source.
Choosing Attach to Source applies the movement of the source object to the destination object,
but disables any animation inherent in the destination object. (However, you can reactivate the
destination object’s own animation and deactivate the source object’s recorded track by turning
o the Position, Scale, and Rotation buttons in the Adjust row of the Behaviors Inspector.)
Choosing Mimic Source combines the motion paths of the source object and destination object’s
own animation. In other words, the destination object maintains its own animation while at the
same time mimicking the motion in the source object’s recorded track. When the Match Move
behavior is set to Mimic Source, turning o the Position, Scale, and Rotation buttons deactivates
the source object’s recorded track. For more information on Attach to Source and Mimic Source,
see Match Move controls on page 996.
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