Tracking Rotation

In this case, you want the object to track only a rotational change.

The Tracker requires two tracker boxes to track rotation. You place the first Tracker over the pivot point of the rotation you want to track. You place the second over an area that describes the arc of the rotation you want to apply to the object.

To track changes in rotation only:

1. Determine a good reference frame and position the clip at that frame.
2. Select the object to which you want to apply the rotational changes. Make sure the pivot point for the object is where you want it to be.
3. On the Tracker panel, select the Source of the reference feature.
4. Click Rotate.

Two Trackers appear. The first Tracker appears over the pivot point of the object and the second appears to its lower right.

5. Position the reference box of the first Tracker over the pivot point of the rotation you want to track.
6. Position the reference box of the second Tracker over the area which describes the arc of the rotation you want to apply to the object.
7. Adjust the settings for each Tracker as necessary.
8. On the Tracker panel, click Select All Trackers, and then click one of the Analyze controls to start the analysis.

The object rotates at its pivot point at each frame to reflect the rotation defined by the motion of the two reference features.

9. Pause the analysis, make adjustments, and restart the analysis as necessary until the analysis is complete. See Advanced Tracking Techniques.
10. Save the Tracker data if necessary.
11. Click the Off button in the Tracker panel when tracking is complete.