Adobe After Effects CS3 - Manual (Page 296)

AFTER EFFECTS CS3
User Guide
291
Setting Shape to Triangle
Smoothness Determines the amount of time the animation takes to transition from one character to another when
you use the Square shape.
Ease High and Ease Low Determines the speed of change as selection values change from fully included (high) to
fully excluded (low). For example, when Ease High is 100%, the character changes more gradually (eases into the
change) while it is fully to partially selected. When Ease High is -100%, the character changes quickly while it is fully
to partially selected. When Ease Low is 100%, the character changes more gradually (eases into the change) while it
is partially selected to unselected. When Ease Low is -100%, the character changes quickly while it is partially
selected to unselected.
Randomize Order Randomizes the order in which the property is applied to the characters specified by the Range
selector. (By contrast, when you use the Wiggly selector, the value of the animator property is randomized.)
Random Seed Calculates the randomized order of a range selector when the Randomize Order option is set to On.
When Random Seed is zero, the seed is based on its animator group. If you want to duplicate an animator group and
retain the same randomized order as in the original animator group, set Random Seed to a value other than zero.
Wiggly selector properties
The Wiggly selector includes the following properties, in addition to properties common with other selectors:
Max Amount and Min Amount Specifies the amount of variation from the selection.
Wiggles/Second How many variations from the set selection occur per second.
Correlation Correlation between variations for each character. At 100%, all characters wiggle by the same amount at
the same time, and at 0%, all characters wiggle independently.
Temporal and Spatial Phase (revolutions + degrees) The variation of wiggle, based on the phase of your animation
in time (temporal) or per character (spatial).
Lock Dimensions Scales the wiggled selection’s dimensions by the same value. This is useful when wiggling the Scale
property.
Random Seed Changes the starting time for the animation by a specified value. When the seed is left at zero, a
default value is derived based on the layer index and stream path.
Expression selector properties
Expand the Expression Selector property group and the Amount property group to reveal the expression field in the
Timeline panel. By default, the Amount property begins with the expression
selectorValue *
textIndex/textTotal .
Expression selectors allow you to express the selector values for each character. The expression is evaluated once per
character. Each time it is evaluated, the input parameter
textIndex is updated to match the index of the character.
Apply the Text Bounce or Inch Worm animation preset to a text layer to see how expression selectors can be used. To
see all expressions on a layer, select the layer and press EE.