Apple Motion 5.1.1 - Manual (Page 997)

Chapter 22 Motion tracking 997
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Type: This pop-up menu lets you choose between one-point, two-point, or four-point tracking.
There are two options:
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Transformation: This option allows one-point or two-point tracking, transforming the
destination object.
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Four Corners: This option enables four-point tracking, corner-pinning the destination object.
When this option is chosen, the Direction and Adjust parameters are no longer available.
Important: The Four Corners option is not available when Match Move is applied to a 3D
group or a mask. To corner-pin a 3D group, select the Flatten checkbox in the Group Inspector.
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Direction: This pop-up menu specifies the dimension in which the recorded movement is
applied to the destination object: Horizontal and Vertical (X and Y), Horizontal (only X), or
Vertical (only Y).
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Transform: This pop-up menu sets how the destination object (the object to which the Match
Move behavior is applied) moves. There are two options:
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Attach to Source: This option anchors the foreground object to the recorded track or
animation source. Use Attach to Source when the source object is scaling or rotating, and
you want the destination object to stick to a spot on the source object. Any animation that
existed on the destination object before applying the track can be preserved by using the
Adjust parameters (Position, Scale, and Rotation), available when Transformation is chosen
from the Type pop-up menu.
Note: Although the destination object is attached to the movement of the source object, the
position of the destination object can be changed (offset from the source object).
In the following example, Match Move is applied to the red pill shape and uses the animated
white arrow as the source object. The white arrow has an applied Spin behavior and is
spinning in a clockwise direction. Additionally, the arrow’s anchor point is positioned at the
bottom of the arrow (at the opposite end from the tip).
Arrow’s anchor point
When Attach to Source is chosen from the Transform pop-up menu and Position and Rotation
are selected in the Adjust parameter row, the red shape is anchored to one spot on the arrow
(the tip, in this example) as it matches the movement of the arrow.
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