User Manual

The Tracker modifier can only output a single value and cannot be used for complex
stabilization procedures, but it is a nice quick way to apply a tracker to a point that you need
to follow.
As an example, to apply the Tracker as a modifier, do the following:
Imagine that you needed to track an actor’s eyes so that an unearthly, alien glow could be
applied to the eyes.
1 Add an ellipse mask node to cover an actor’s eye.
2 In the Inspector, right-click on the mask’s Center parameter and from the contextual
menu choose Ellipse1 Center > Modify With > Tracker Position.
Right-click over any Center Coordinate Control and choose Modify
With > Tracker Position to add a Tracker modifier.
3 Click the Modifiers tab in the Inspector and drag the MediaIn1 node that you want to
track into the Tracker Source field.
The Modifiers tab includes the tracking controls and a Tracker
Source field to indicate which node to use for tracking.
4 Click the Track Forward button to begin tracking the person’s eye.
Chapter – 73 Using the Tracker Node 1510