Enables certain nodes only when approximately visible. The VisibilityEnabler2D will disable [RigidBody2D], [AnimationPlayer], and other nodes when they are not visible. It will only affect nodes with the same root node as the VisibilityEnabler2D, and the root node itself. [b]Note:[/b] For performance reasons, VisibilityEnabler2D uses an approximate heuristic with precision determined by [member ProjectSettings.world/2d/cell_size]. If you need exact visibility checking, use another method such as adding an [Area2D] node as a child of a [Camera2D] node. [b]Note:[/b] VisibilityEnabler2D will not affect nodes added after scene initialization. Returns whether the enabler identified by given [enum Enabler] constant is active. Sets active state of the enabler identified by given [enum Enabler] constant. If [code]true[/code], [RigidBody2D] nodes will be paused. If [code]true[/code], [AnimatedSprite] nodes will be paused. If [code]true[/code], [AnimationPlayer] nodes will be paused. If [code]true[/code], [Particles2D] nodes will be paused. If [code]true[/code], the parent's [method Node._physics_process] will be stopped. If [code]true[/code], the parent's [method Node._process] will be stopped. This enabler will pause [AnimationPlayer] nodes. This enabler will freeze [RigidBody2D] nodes. This enabler will stop [Particles2D] nodes. This enabler will stop the parent's _process function. This enabler will stop the parent's _physics_process function. This enabler will stop [AnimatedSprite] nodes animations. Represents the size of the [enum Enabler] enum.