5.1.1

Chapter 20 Shapes, masks, and paint strokes 880
Wriggle Shape
This behavior works similarly to the Randomize behavior, but with a slower eect.
When the Wriggle Shape behavior is applied to a shape, all control points of the shape are
aected by default. When the behavior is selected in the Layers list, aected control points
are highlighted in white on the blue shape behavior spline. To disable control points, click the
control points. A disabled point appears blue.
Parameters in the Inspector
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Amount/Multiplier: A slider that denes the maximum value the Wriggle behavior generates.
When the Apply Mode is set to Add, Subtract, or Add and Subtract, the slider is labeled
Amount; when the Apply Mode is set to Multiply, the slider is labeled Multiplier.
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Apply To: A pop-up menu that denes whether the behavior is applied to the shape’s control
points, tangent handles, or both points and handles.
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Points: The control points of the shape are wriggled, changing their position over the
duration of the behavior.
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Tangents: The control points’ tangent handles (rather than the control points) are wriggled.
The control points stay in a xed position while the curves between the points are animated.
•
Points and Tangents: Both the control points and tangent handles are animated.
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Apply Mode: A pop-up menu that determines how values generated by this behavior are
combined with other behaviors and keyframes that aect the same parameter. This provides
you with dierent ways of using a Wriggle behavior to modify a vertex’s preexisting values.
There are four options:
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Add: Values generated by this behavior are added to other behaviors and keyframes that
aect the same parameter.
•
Subtract: Values generated by this behavior are subtracted from other behaviors and
keyframes that aect the same parameter.
•
Multiply: Values generated by this behavior are multiplied by other behaviors and keyframes
that aect the same parameter.
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Add and Subtract: Values generated by this behavior are added to and subtracted from other
behaviors and keyframes that aect the same parameter.
•
Frequency: A slider that sets the amount of random variation per second. Higher values
generate faster variations, whereas lower values generate slower variations.
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Wriggle Oset: A slider that osets the sequence of random values when you want to apply
the same Wriggle behavior to multiple shapes. By osetting each shape’s version of the
Wriggle behavior, you can prevent them from moving in sync.
•
Noisiness: This slider adds an additional overlay of random variance to the Frequency you’ve
set. Higher Noisiness values result in more erratic variations in the aected vertices.
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