2011

An expression is automatically created linking the tracking data to the
scaling of the new license plate.
18 Play the footage to view the result.
NOTE When tracking data needs to be applied to more than one layer in a
composition, add an extra axis node to the dependency graph and connect it to
the appropriate layers. Linking the axis to several layers facilitates panning multiple
objects inside a reaction. In this case you would then click the axis node instead
of the Layers node at step 15, and right-click the Scale label and continue the
procedure.
(a) Axis node connected to two layers inside Reaction.
Tracking the Rotation of an Object
In some cases, you may want the object to track only a rotational change. The
Tracker requires two tracker boxes to track rotation. The first Tracker goes over
the pivot point of the rotation you want to track. You place the second over
an area that describes the axis of the rotation you want to apply to the object.
NOTE You can also use the 2D Transform, and the rotation parameter controls
of the Garbage Mask, Remove Dust and Warp2D tools.
To track changes in rotation only:
1 Determine a good reference frame and position the footage at that frame.
2 Select the Tracker Analyzer tool from the Tools tab and drag it to
Schematic. You do not need to attach it directly to the dependency graph
Tracking the Rotation of an Object | 775