Instruction Manual

Chapter 9 Behaviors 355
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Object: An object well that denes the object of attraction. To set the dened target object,
drag the object from the Layers list to the Object well in the Attracted To HUD or Inspector. In
the Layers list, you can also drag the target object onto the Attracted To behavior.
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Strength: A slider dening the speed at which the object moves toward the object of
attraction. With a value of 0, the object doesn’t move at all. The higher the value, the faster the
object moves.
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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. There are two menu items:
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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 reduces the distance attracted objects overshoot the object of attraction.
Lower Drag values result in the object overshooting the object of attraction, moving past and
then careening back around toward the target object again and again. Higher Drag values
result in the object coming to rest sooner.
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Include X, Y, and Z: Buttons that specify the axes on which the aected object (or objects)
moves around the object to which it is attracted. When Z is enabled, the object moves about
its attractor object in Z space.
Attractor
The Attractor behavior, when applied to an object, causes other objects that lie within the area
of inuence move toward it. You can manipulate the strength with which other objects are
attracted, as well as the distance required for attraction to begin.
Start of Attractor effect
End of Attractor effect (motion paths shown)
By default, objects overshoot the object of attraction and bounce around, never coming to rest.
The Drag parameter lets you adjust this behavior, changing whether attracted objects overshoot
and bounce around, or whether they eventually slow down and stop at the position of the
target object.
The Attractor behavior can aect all objects in the Canvas that fall within the area of attraction,
or you can limit its eect to a specic list of objects by using the Aect parameter.
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