Apple Motion 2 - Manual (Page 365)

Chapter 5 Using Behaviors 365
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.
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 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.
Related behaviors
“
Random Motion ,” “ Wriggle ”
Rate
This behavior increases a parameter’s value over time, with the rate of increase
determined by the Rate slider. Unlike the Ramp behavior, this behavior has no end
value; it simply continues to increase or decrease the parameter it’s applied to until the
end of the parameter.
Note: To use the Rate parameter to decrease a parameter over time, enter a negative
value into the Rate parameter.
Dashboard control
The Dashboard has controls for Rate, Curvature, and parameter assignment.
Parameters in the Inspector
Rate: A value slider that lets you set a rate of increase over time for the affected
parameter. Measured in percentage increase per second.
Curvature: This parameter lets you ease the acceleration with which the Rate behavior
transitions from the Start Value to the End Value. Higher Curvature values result in an
Ease In/Ease Out effect, where the value slowly begins the transition, gradually speeds
up as the behavior continues, then gradually slows down to a stop as it reaches the
end. Curvature does not affect the overall duration of the effect, since that is defined by
the length of the behavior in the Timeline.
Affects Parameters affected
Individual parameter Any
01112.book Page 365 Sunday, March 13, 2005 10:36 PM