Apple Shake 4 - Manual (Page 799)

Chapter 26 Transformations, Motion Blur, and AutoAlign 799
useReference
Applies the transform to the image or doesn’t. If it doesn’t, and you have animated
values, useReference applies a motion blur to the image, but does not actually move it.
This is good for adding blur to plates. See below for an example.
• 0 = Move image
• 1 = Smear-mode; image is not moved
• referenceFrame: A subparameter of useReference used for image stabilization. By
default, this parameter is set to “time,” that is, in reference to itself. However, if
inverseTransform is set to 1, you are stabilizing, with the assumption that any
animation you have applied matches up to the source animation. Setting the
reference frame locks the movement in to a specific frame.
Note: For an example of using the useReference parameter, see “ Applying Motion Blur
to Non-Keyframed Motion ” on page 781.
Move3D
The Move3D node allows you to create perspective changes by rotating and visually
moving the image in depth. It is similar in behavior to the Move2D node.
Some Move3D parameters, such as zPan, have no effect unless the fieldOfView
parameter is set to a value greater than 0. The angle of the Z axis is controlled, as in
Move2D, by the angle parameter. There is no shearing, but you can rotate the image in
X or Y, and keep the fieldOfView set to 0 to get orthogonal shearing effects.
Parameters
This node displays the following controls in the Parameters tab:
xPan, yPan, zPan
These values let you move the image horizontally, vertically, and in and out along the Z
axis. 0, 0 represents the center of the frame, and the xPan and yPan sliders allow
adjustments up to plus or minus the total width and height of the image frame.
zPan has no effect unless the fieldOfView value is set to greater than 0.
xAngle, yAngle, zAngle
Lets you rotate the image around its center point, along any axis in three-dimensional
space. The slider allows adjustments plus or minus 360 degrees, but you can enter any
value you want into the numeric field.
aspectRatio
This parameter inherits the current value of the defaultAspect global parameter. If
you’re working on a nonsquare pixel or anamorphic image, it is important that this
value is set correctly to avoid unwanted distortion in the image.