Instruction Manual

Chapter 9 Behaviors 367
Parameters in the Inspector
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Aect: A pop-up menu that limits which objects in your project are aected by the Vortex
behavior. There are three options:
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All Objects: All objects in the Canvas are aected by the Vortex behavior.
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Related Objects: The default setting. Only other objects in the same group as the object of
attraction are aected.
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Specic Objects: Only objects appearing in the Aected Objects list are aected by the
Vortex behavior.
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Aected Objects: A list that appears when Specic Objects is chosen in the Aect pop-up
menu. Objects you drag from the Layers list into this list are aected by the Attractor behavior
when the Specic Objects option is selected in the Aect pop-up menu. To remove an
item from the list, select the item and click Remove. The Aected Objects lists contains the
following columns:
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Layer: This column lists the name of the layer containing the object.
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Name: This column lists the name of the object.
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Strength: A slider that sets the speed at which the aected objects move about the object
of attraction.
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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 vortex to decay. The default value for Vortex is 0, which results
in a stable vortex. Any other value causes the vortex 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 objects vortex around the target
object. For example, when X and Y are enabled, the object circles around in the XY plane;
when Y and Z are enabled, the object circles around in the YZ plane.
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Pole Axis: A pop-up menu that becomes available when the X, Y, and Z axes are enabled in the
Include parameter. Because all points are at a xed distance from the target or attractor object
(the Pole Axis), the object can be visualized on a sphere of all possible orbits, with the target
object at the center of the sphere. The Pole Axis denes the two points on the sphere that
the orbit must pass through. For more information, see this parameter’s discussion in Orbit
Around on page 360.
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Direction: A pop-up menu that sets whether objects move around in a clockwise or
counterclockwise direction.
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