Constants that indicate the shape of the item’s collision bounds.
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enum UIDynamicItemCollisionBoundsType : UInt
Rectangular collision bounds.
Elliptical collision bounds. The shape of the ellipse is determined by the width and height of the item’s bounds property.
Path-based collision bounds. For this type, the shape is a UIBezierPath object stored in the item’s collisionBoundingPath property. See the description of that property for information about how to configure the path itself.