2009

features in the scene with 3D objects when the movement is approximately
planar. After the tracking data is created you can use this function to do such
things as synchronizing the movement of 3D objects with feature movements
in the background movie. If the 3D objects directly cover the background
features, they will appear to replace them. For example, you could take the
video of a juggler juggling balls and replace the balls with 3D balls of fire or
synchronize the movement of an animal's head with a 3D jaw to create talking
animal animations.
Procedures
Example: To create a juggler juggling 3D balls of fire:
This assumes you already have a video of a juggler. Otherwise, find a juggler
and a video camera.
1 Load a video of a juggler.
2 Create tracker gizmos to associate with the juggling balls.
3 Use the Movie Stepper to track the gizmos.
4 Go to Object Pinning and choose the tracker.
5 Under Object To Pin, associate an object with a tracker. In this case, create
a 3D ball of fire using fire or an animated map to generate the fire.
6 Adjust the Pin Range, and then click the Pin button to move the object
to follow the tracker.
3848 | Chapter 15 Animation