Wriggle
This behavior works similarly to the Randomize behavior, but with a slower effect.
Tip: A Wriggle behavior applied to an Opacity parameter set to 100% does not have
much effect. This is because there isn’t much room to “wriggle.” For a better result, set
the Opacity to 0, or change the Apply Mode to Subtract.
Parameters in the Inspector
Amount/Multiplier:
This parameter is set to Amount when the Apply Mode is set to Add,
Subtract, or Add and Subtract. This parameter is set to Multiplier when the Apply Mode
is set to Multiply. This parameter defines the maximum value that the Wriggle behavior
generates.
Apply Mode:
A pop-up menu that determines how values generated by this behavior
are combined with other behaviors and keyframes that affect the same parameter. This
provides you with different ways of using a Wriggle behavior to modify a parameter’s
preexisting values. The options are Add, Subtract, Multiply, or Add and Subtract.
Frequency:
A slider that lets you adjust the amount of random variation per second.
Higher values generate faster variations, whereas lower values generate slower variations.
Wriggle Offset:
A slider that allows you to offset the sequence of random values when
you want to apply the same Wriggle behavior to multiple objects. By offsetting each
object’s version of the Wriggle behavior, you can prevent objects 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 affected
parameter.
Link:
This parameter appears when you apply the Wriggle behavior to a two-dimensional
parameter (such as Scale) or three-dimensional parameter (such as Position) that consists
of X, Y, and/or Z values. Turn this checkbox on to keep the behavior’s effect on each value
proportional.
Affect Subobjects:
This parameter only appears when the Wriggle behavior is applied
to a parameter of the Sequence Replicator behavior. When Affect Subobjects is selected,
each object has a different wriggle behavior. When Affect Subobjects is deselected, each
object undergoes the same animation.
Random Seed:
A button that lets you pick a new random seed number. This number is
used to randomly generate new sequences of values, based on the other parameters of
this behavior.
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Chapter 9
Using Behaviors
Start Offset:
A slider that lets you delay the beginning of the behavior’s effect relative
to the first frame of its position in the Timeline. Adjust this parameter to make the behavior
start later. This parameter is measured in frames.
End Offset:
A slider that lets you offset the end of the behavior’s effect relative to the
last frame of its position in the Timeline, in frames. Adjust this parameter to make the
behavior stop before the actual end of the behavior in the Timeline. Using this slider to
stop the effect, instead of trimming the end of the behavior in the Timeline, freezes the
last random value generated by this behavior for the remaining duration of the object.
Trimming the end of the behavior resets the parameter to its original value.
Apply To:
The Apply To pop-up menu shows the parameter affected and can be used
to reassign the behavior to another parameter.
HUD Controls
The HUD lets you adjust the Amount, Multiplier, Frequency, Wriggle Offset, Noisiness,
Link (for multidimensional parameters), Start Offset, and End Offset parameters, as well
as change the parameter assignment.
Related Behaviors
•
Random Motion
•
Randomize
Retiming Behaviors
Retiming behaviors are applied to image sequences, QuickTime movies, and clone layers
to change their timing. Retiming effects include creating hold frames, changing playback
rate, reversing a clip, creating stutter or strobe effects, and so on.
Important:
Retiming behaviors can only be applied to QuickTime movies, image
sequences, or clone layers. In other words, a Retiming behavior cannot be applied to a
particle emitter, but it can be applied to an instance of the particle emitter. For more
information on cloning layers, see
Making Clone Layers
.