Apple Shake 4 New Features - Manual (Page 58)

58 Chapter 2 Major Features and New Nodes
• rotateLock: Locks the rotation of the image.
• zoomLock: Locks an image that is being zoomed.
Note: Don’t turn on zoomLock unless you’re absolutely positive that the image is
being dynamically zoomed.
• perspectiveLock: Locks an image experiencing a change in perspective, similar to a
reverse corner-pin.
Motion
The values within the parameters in the motion subtree are not meant to be editable,
or even directly intelligible. They’re available to be loaded into the curve editor so that
you can find possible spikes in the analysis data that, along with a low confidence
value, might indicate an error. In this case, you have the option of deleting the
offending keyframe, in order to see if the resulting smoothing or locking operation
becomes more acceptable.
• confidence: Unlike the tracking nodes, the confidence value is restricted to one of
three possible values. You can load the confidence parameter into the Curve Editor to
quickly find problem areas in the analysis. The values are:
• 1: Indicates an analysis in which Shake has high confidence. A keyframe is
generated at these frames.
• 0.5: Indicates an uncertain analysis. Shake also generates a keyframe at these
frames.
• 0: Indicates that Shake has no confidence in the analysis. No keyframe is
generated.
• translationX, translationY: Contains the X and Y translation data.
• rotation: Contains the rotation data.
• zoom: Contains the zoom data.
The AutoAlign Node
The AutoAlign node is unique among the transform nodes in that it can take multiple
image inputs and combine them into a single output, similar to a layering node. This
node is designed to take two or three images or image sequences that overlap, and
align them in different ways to create a single, seamless output image.
Unlike similar photographic tools, the AutoAlign node works with both stills and image
sequences. As a result, you could film three side-by-side shots of an expanse of action,
and later turn these into a single, extremely wide-angle background plate. Similarly,
you can set a single still image to align with the same image features in a second shot
with camera motion.