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Color: Click or Control-click the color well to set a color for the onscreen tracker. You can
also click the eyedropper and select a color in the Canvas. The default tracker color is red.
When a tracker is selected, its center point is yellow and the border of its magnified inset
is the color set in the color well. To adjust individual color channels, including the tracker’s
opacity, click the disclosure triangle.
Tracker pop-up menu: When the Track parameter behavior references another behavior,
such as Analyze Motion, the Track list parameters are replaced with the Tracker pop-up
menu. Select the tracker you want to apply from the referenced tracking behavior to the
position parameter of the affected object from this menu.
Apply To: Click the Go pop-up menu to apply parameter to the track. For example, if the
Track parameter is applied to the X Position parameter of the tracked object and you
want to apply the data to the X and Y Position parameters, click Go and choose >
Properties > Transform > Position > X and Y.
HUD Controls
The Track parameter HUD contains controls to load a tracking behavior into the behavior
(via the Source Behavior well or the tracking behaviors pop-up menu), to specify how
the position parameter moves, to start the motion analysis (via the Analyze button), to
reverse the direction of the track (via the Reverse checkbox), and to offset the track (via
the Offset Track checkbox).
1362 Chapter 22 Motion Tracking