Apple Shake 4 User Manual
Page 798
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Chapter 26
Transformations, Motion Blur, and AutoAlign
Note: Entering a negative value into the xScale or yScale numeric field reverses the
image along that axis.
xShear, yShear
These parameters let you shear the image horizontally and vertically. The sliders let you
adjust the shearing of the image anywhere between 0 and 1 (1 creates 45 degrees of
shearing), but you can enter any value you want into the numeric field.
xCenter, yCenter
These parameters let you move the horizontal and vertical position of the center point
around which all transformations occur. For example, moving the center point to the
right changes the point about which the image rotates when you adjust the angle
parameter.
xFilter, yFilter
Lets you pick which method Shake uses to transform the image. For more information,
see “
Filters Within Transform Nodes
transformationOrder
The order the transform is executed, with:
•
t = translate
•
r = rotate
•
s = scale
•
x = shear
By default, this is set to “trsx.”
inverseTransform
Inverts the transform. This can be used to quickly convert tracking data into
stabilization data.
motionBlur
Motion Blur quality level. 0 is no blur, whereas 1 represents standard filtering. For more
speed, use less than 1. This value is multiplied by the global motionBlur parameter.
•
shutterTiming: A subparameter of motionBlur used to specify shutter length. 0 is no
blur, whereas 1 represents a whole frame of blur. Note that standard camera blur is
180 degrees, or a value of .5. This value is multiplied by the global shutterTiming
parameter.
•
shutterOffset: A subparameter of motionBlur representing the offset from the current
frame at which the blur is calculated. Default is 0; previous frames are less than 0.