A [RigidBody2D]-derived node used to make [Bone2D]s in a [Skeleton2D] react to physics. The [PhysicalBone2D] node is a [RigidBody2D]-based node that can be used to make [Bone2D]s in a [Skeleton2D] react to physics. [b]Note:[/b] To make the [Bone2D]s visually follow the [PhysicalBone2D] node, use a [SkeletonModification2DPhysicalBones] modification on the [Skeleton2D] parent. [b]Note:[/b] The [PhysicalBone2D] node does not automatically create a [Joint2D] node to keep [PhysicalBone2D] nodes together. They must be created manually. For most cases, you want to use a [PinJoint2D] node. The [PhysicalBone2D] node will automatically configure the [Joint2D] node once it's been added as a child node. Returns the first [Joint2D] child node, if one exists. This is mainly a helper function to make it easier to get the [Joint2D] that the [PhysicalBone2D] is autoconfiguring. Returns a boolean that indicates whether the [PhysicalBone2D] is running and simulating using the Godot 2D physics engine. When [code]true[/code], the PhysicalBone2D node is using physics. If [code]true[/code], the [PhysicalBone2D] will automatically configure the first [Joint2D] child node. The automatic configuration is limited to setting up the node properties and positioning the [Joint2D]. The index of the [Bone2D] that this [PhysicalBone2D] should simulate. The [NodePath] to the [Bone2D] that this [PhysicalBone2D] should simulate. If [code]true[/code], the [PhysicalBone2D] will keep the transform of the bone it is bound to when simulating physics. If [code]true[/code], the [PhysicalBone2D] will start simulating using physics. If [code]false[/code], the [PhysicalBone2D] will follow the transform of the [Bone2D] node. [b]Note:[/b] To have the [Bone2D]s visually follow the [PhysicalBone2D], use a [SkeletonModification2DPhysicalBones] modification on the [Skeleton2D] node with the [Bone2D] nodes.