System information
Item Description
Depth Adjust Type a value in the box (or click the to display a slider you can
drag) to displace the left-and right-eye images to set the depth of
your 3D image. You usually want all of the action behind the screen
plane, only crossing the screen plane for dramatic or special effect.
However, make sure never to create divergence, where the left-eye
picture would appear more than 2.5 inches to the left of the right-eye
picture on the largest screen where your movie will be shown.
0 represents screen depth; positive values push action behind screen
depth, and negative values push action in front of screen depth.
Changing editing options
Use the toolbar at the top of the Track Motion window to change your editing options:
Item Description
Enable Rotation Select this button if you want to be able to rotate, or spin, the video.
When the button is not selected, video is locked so you can move it
along the X, Y, or Z axis, but the track cannot be rotated.
Enable Snapping to
Grid
Select this button if you want your editing to snap to the grid.
Edit in Object
Space
Select this button if you want to edit in the object's space rather than
the camera's space.
For example, if a track is rotated, its X axis may not correspond to the
X axis of the of the Video Preview window. Selecting the Edit in
Object Space button in conjunction with the Prevent Movement
buttons allows you to move the object along its own X, Y, and Z axes.
Prevent Movement
(X)
Select this button if you want to prevent horizontal movement of the
track.
Prevent Movement
(Y)
Select this button if you want to prevent vertical movement of the
track.
Prevent Movement
(Z)
Select this button if you want to prevent movement of the track
along the Z axis (closer to or farther from the viewer).
Lock Aspect Ratio Select this button if you want the selection box to retain its aspect
ratio during resizing.
When the button is not selected, the height and width can be resized
independently.
Scale About Center Select this button if you want the selection box to retain its center
point when you resize the box by dragging its edges.
When the button is not selected, the opposite side of the selection
box will remain anchored when you drag the edges to resize it.
396CHAPTER 16