Apple Shake 4 - Manual (Page 562)

562 Chapter 20 Rotoscoping
invert
Turning on the Invert button expands the keyframes by the Amount value, instead of
contracting them. This has an identical effect to setting Amount to a decimal value
between 0 and 1.
Remap Adjustments
Setting Operation to Remap provides a way for you to use curve expressions to retime
the current keyframe distribution. This lets you apply a retiming curve from a FileIn node
to the keyframes of a shape that you’ve already animated to rotoscope that image.
Note: If you want to create a curve specifically to use with the Node Retime command,
you can create a local variable within the RotoShape Parameters tab, load it into the
Curve Editor, and create a curve expression which you can then copy and paste from
the local variable into the Retime Expr field.
Attaching Trackers to Shapes and Points
You can attach preexisting Tracker nodes to a shape, or to any one of a shape’s
individual control points. Once a tracker is attached and you are happy with the result,
you can bake the track into the shape’s panX and panY parameters.
Attaching Trackers to Shapes
When you attach a tracker to a shape within a RotoShape node, the individual rotoshape
control points are not changed as the shape moves along the tracked motion path.
Furthermore, the offset between the position of the tracker and the original position of
the shape is maintained as the shape follows the path of the tracker. You can attach
separate trackers to separate shapes within the same RotoShape node.