5.1.1

Chapter 9 Behaviors 361
Parameters in the Inspector
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Aect Subobjects: A checkbox, available when this behavior is applied to an object that
contains multiple objects, such as a group, a particle emitter, a replicator, or a text layer. When
this checkbox is selected, all objects in the parent object are aected individually. When this
checkbox is deselected, all objects in the parent object are aected by the behavior together.
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Object: An object well that denes the object to orbit around. To set the dened target object,
drag the object from the Layers list to the Object well in the Orbit Around HUD or Inspector. In
the Layers list, you can also drag the target object onto the Orbit Around behavior.
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Strength: A slider that sets the speed of the object.
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Fallo Type: A pop-up menu that determines whether the distance dened by the Inuence
parameter falls o linearly or exponentially. The default is Linear.
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Linear: Object attraction falls o in proportion to the object’s distance.
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Exponential: The closer an object is within the area of inuence, the more strongly it is
attracted, and the faster it moves toward the object of attraction.
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Fallo Rate: A slider that sets how quickly the force of attraction between objects aected by
this behavior falls o. A low Fallo Rate value results in objects quickly getting up to speed
as they move toward the object of attraction. A high Fallo Rate causes objects to accelerate
much more slowly. When set to Exponential, the attraction falls o more quickly than when set
to Linear.
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Inuence: A slider that denes the radius of the circle of inuence in pixels. Objects that fall
within the area of inuence move toward the object of attraction. Objects outside the area of
inuence remain in place.
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Drag: A slider that causes the orbit to decay. The default value for Orbit Around is 0, which
results in a stable orbit. Any other value causes the orbit to decay and the object to spiral into
the object of attraction.
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Include X, Y, and Z: Buttons that specify the space in which the orbit occurs. For example, when
X and Y are enabled, the object orbits in the XY plane. In the illustration below, X and Y are
selected in the Include parameter. The red motion paths represent the motion of the white
airplanes around the target object (the circle). The light gray box represents the boundary of
the group.
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