# PhysicsRevoluteJoint A joint that allows one degree of rotational freedom between two entity pins, similar to a door swinging on its hinges. ``` struct PhysicsRevoluteJoint ``` ## Overview `PhysicsRevoluteJoint` allows one rotational degree of freedom along the x-axis of two entity pins. > Tip: Pass an orientation when creating the ``doc://com.apple.RealityKit/documentation/RealityKit/GeometricPin`` instances to change the axis of rotation. ## Topics ### Initializers [`init(pin0: GeometricPin, pin1: GeometricPin, angularLimit: ClosedRange?, checksForInternalCollisions: Bool)`](/documentation/RealityKit/PhysicsRevoluteJoint/init(pin0:pin1:angularLimit:checksForInternalCollisions:)) Creates a new revolute joint. ### Instance Properties [`var angularLimit: ClosedRange?`](/documentation/RealityKit/PhysicsRevoluteJoint/angularLimit) A limit of the rotational freedom between the pins around the x-axis. ## Relationships ### Conforms To [`PhysicsJoint`](/documentation/RealityKit/PhysicsJoint) [`Equatable`](/documentation/Swift/Equatable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)