Apple Motion 5.1.1 - Manual (Page 346)

Chapter 9 Behaviors 346
Parameters in the Inspector
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Start Value: A slider that sets the value that’s added to the parameter at the first frame of the
Ramp behavior.
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End Value: A slider that sets the value the Ramp behavior reaches at the last frame of the
behavior. Over the life of the behavior, the parameter the Ramp behavior is applied to makes a
transition from the Start Value to the End Value, plus the original value.
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Curvature: A slider that eases the acceleration at which the Ramp behavior transitions from the
Start Value to the End Value. Higher Curvature values result in an ease in/ease out effect, where
the transition begins slowly, gradually speeds up as the behavior continues, then gradually
slows to a stop as it reaches the end. Because Curvature is defined by the length of the
behavior in the Timeline, this parameter does not affect the overall duration of the effect.
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Start Offset: A slider that delays the beginning of the behavior’s effect relative to the first frame
of its position in the Timeline, in frames. Adjust this parameter to make the behavior start later.
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End Offset: A slider that offsets 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 end of the effect for the
remaining duration of the object. Trimming the end of the behavior resets the object to its
original parameter.
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Apply To: A pop-up menu that shows the parameter affected and can be used to reassign the
behavior to another parameter.
Randomize
The Randomize behavior creates a continuous sequence of randomly increasing and decreasing
values, based on the parameters defining the range and type of values generated. Use
Randomize to create jittery effects, such as twitchy rotation, flickering opacity, and other effects
requiring rapid and varied changes over time that would be time-consuming to keyframe.
Although the values created with this behavior appear to be random, they’re predetermined
by the parameter settings you’ve chosen. As long as you don’t change the parameters, the
frame-by-frame values created by this behavior remain the same. If you don’t like the randomly
generated values, click the Generate button in the Behaviors Inspector to pick a new random
seed number. This number is used to generate a new sequence of values.
The Apply Mode parameter 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 Randomize behavior to modify a parameter’s preexisting values.
The Randomize behavior can be modified with other behaviors, such as Average and Negate, to
exercise further control over the values generated.
Parameters in the Inspector
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Amount/Multiplier: A slider that defines the maximum value the Randomize behavior will
generate. The Amount slider is available when the Apply Mode is set to Add, Subtract, or Add
and Subtract. The Multiplier slider is available when the Apply Mode is set to Multiply.
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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 affect the same parameter. Choose Add,
Subtract, Multiply, or Add and Subtract.
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Frequency: A slider that sets the amount of random variation per second. Higher values
generate faster variations; lower values generate slower variations.
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