Apple Shake 4 - Manual (Page 186)

186 Chapter 5 Compatible File Formats and Image Resolutions
Cropping Functions
This section describes several nodes you can use to crop your images. Window,
Viewport, and Crop are located in the Transform tab, and AddBorders is located in the
Other tab.
AddBorders
The AddBorders node is similar to a Crop, except it adds an equal amount of space to
the left and right sides, or to the top and bottom sides. It is located in the Other tab
because of its infrequent use.
Parameters
This node displays the following controls in the Parameters tab:
xBorder
The number of added pixels to the left and right border.
yBorder
The number of added pixels to the bottom and top border.
Crop
This node crops an image by defining the lower-left corner and the upper-right corner
of the crop. Since the numbers can be greater or less than the boundaries of the image,
you can make the image smaller, or expand the image with a black border. A Crop cuts
elements beyond the frame area, so if you later use another transform node (for
example, Pan, Move2D, and so on) to move the image, black is brought in. This is how
Crop differs from Viewport—Viewport does not cut off the image. Window is also the
same command, but you set the lower-left corner, and then the X and Y resolution.
Crop is particularly helpful in that it sets a new frame area. Shake only processes nodes
within the frame, so to speed up an operator you can limit its area with a Crop. This is
essentially what is done with the Constraint node.