6.0

Table Of Contents
3D Effect Parameters
717
Corner Tracking
Lets you use tracking data to control the effect. When you enable a selector, your Avid editing
application maps a tracker to that selector. Trackers are named Point A, Point B, and so on. For
more information, see “Motion Tracking and Stabilization” on page 309.
Corner Tracking appears in tracking-enabled 3D Warp effects and Intraframe effects only. For
Intraframe effects, you can enable trackers only when an Intraframe object is selected. Tracking
is also an option under the Position (3D), Rotation, and Scaling (3D) parameter categories.
Crop (3D)
Crop trims the edges of an image.
Crop is at the bottom of the 3D parameter hierarchy, so it always crops the same four edges of
the object regardless of the object’s orientation. Cropping works only in 2D space so that 3D
parameters such as Rotation and Position, which are higher in the hierarchy, take effect later in
the processing. You do not need to adjust cropping before the other parameters, but it is often
difficult to crop edges after other 3D transformations. For more information on the 3D parameter
hierarchy, see “Understanding 3D Parameter Hierarchy” on page 713.
Crop parameter category (left) and Crop button (right)
Parameter Description
T (top) Crops the top edge of the image. Values range from –999 (bottom) to 999 (top).
L (left) Crops the left edge of the image. Values range from –999 (left) to 999 (right).
B (bottom) Crops the bottom edge of the image. Values range from –999 (bottom) to 999 (top).
R (right) Crops the right edge of the image. Values range from –999 (left) to 999 (right).