Apple Motion 5.1.1 - Manual (Page 998)

Chapter 22 Motion tracking 998
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Mimic Source: This option allows the destination object to mimic the recorded track or
animation source. Any animation that existed on the foreground object before applying
the track can be added to the track by selecting Position, Rotation, or Scale in the
Adjust parameters.
Note: As with Attach to Source, the position of the destination object can be changed (offset
from the source object). Additionally, the destination object can be scaled and rotated.
In the following images, Mimic Source is chosen from the Transform pop-up menu and
Position and Rotation are selected in the Adjust parameter row. The red shape is not locked to
one spot on the white arrow, but rather mirrors the arrow’s animation.
Mimic Source lets you transform a tracked object in the Properties Inspector. For example, you
can change the scale, position, or rotation of a corner-pinned object. Also when using Four
Corners, Mimic Source lets you adjust the trackers without adjusting the foreground image.
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Adjust: This parameter sets the type of transformation applied to the destination object.
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Position: When enabled, the position of the source (or background) object is applied to the
destination (or foreground) object, and the Anchor (position) tracker is turned on.
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Scale: When enabled, the scale of the source (or background) object is applied to the
destination (or foreground) object. The source track must include scale data for this
parameter to have any effect. When Scale is enabled, the Rotation-Scale tracker is turned on.
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Rotation: When enabled, the rotation of the source (or background) object is applied to
the destination (or foreground) object. The source track must include rotation data for this
parameter to have any effect. When Rotation is enabled, the Rotation-Scale tracker is turned on.
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Tracker Preview: This preview area appears only when there is a tracking source (footage) in
the source well. Use the preview to see a magnified view of the tracking reference area for the
selected tracker. The preview updates as you adjust the position of the tracker in the Canvas.
You can also drag in the preview area to adjust the position of the tracker. When dragging in
the preview area, the image moves around the red crosshairs in the preview and the tracker
moves in the Canvas.
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Offset Track: This parameter appears only when there is a tracking source (footage) in the
source well. If a tracker’s reference point becomes temporarily hidden or goes off the screen,
this parameter lets you select a different reference point that continues the same tracking path
as the original reference point. For more information on offset tracking, see
Track obscured or
off-frame points on page 988.
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Auto-Zoom: This parameter appears only when there is a tracking source (footage) in the
source well. Choose an option from this pop-up menu to set the magnification level when
positioning the tracker in the Canvas, to zoom in on the Canvas when searching for an ideal
tracking reference pattern. There are four choices: None, 2x, 4x, and 8x.
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Auto-Zoom Mode: This parameter appears only when there is a tracking source (footage) in the
source well. Choose an option from this pop-up menu to set the display of the auto-zoomed
tracker in the Canvas. There are three choices:
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Normal: Displays a normal pattern.
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Contrast: Displays the tracker pattern with contrast detection.
67% resize factor