protocol VariantRepresentable : VariantStorable
Types that conform to VariantRepresentable can be stored directly in Variant with no conversion. These include all of the Variant types from Godot (for example GString, Rect, Plane), Godot objects (those that subclass SwiftGodot.Object) as well as the built-in Swift types UInt8, Int64 and Double.
final var rough: Bool { get set }
If true, the physics engine will use the friction of the object marked as “rough” when two objects collide. If false, the physics engine will use the lowest friction of all colliding objects instead. If true for both colliding objects, the physics engine will use the highest friction.