# PortalComponent.Plane A representation of a portal as an infinite plane. ``` struct Plane ``` ## Overview Enable the corresponding clipping and crossing features by passing this value in [`PortalComponent.ClippingMode.plane(_:)`](/documentation/RealityKit/PortalComponent/ClippingMode-swift.enum/plane(_:)) or [`PortalComponent.CrossingMode.plane(_:)`](/documentation/RealityKit/PortalComponent/CrossingMode-swift.enum/plane(_:)). RealityKit defines the [`position`](/documentation/RealityKit/PortalComponent/Plane/position) and [`normal`](/documentation/RealityKit/PortalComponent/Plane/normal) properties in entity local space. The following default values are available: - [`positiveX`](/documentation/RealityKit/PortalComponent/Plane/positiveX) - [`negativeX`](/documentation/RealityKit/PortalComponent/Plane/negativeX) - [`positiveY`](/documentation/RealityKit/PortalComponent/Plane/positiveY) - [`negativeY`](/documentation/RealityKit/PortalComponent/Plane/negativeY) - [`positiveZ`](/documentation/RealityKit/PortalComponent/Plane/positiveZ) - [`negativeZ`](/documentation/RealityKit/PortalComponent/Plane/negativeZ) See [`PortalComponent`](/documentation/RealityKit/PortalComponent) for example usage. ## Topics ### Creating a plane ### Initializers [`init(position: SIMD3, normal: SIMD3)`](/documentation/RealityKit/PortalComponent/Plane/init(position:normal:)) Creates a portal plane with position and normal. ### Instance Properties [`var normal: SIMD3`](/documentation/RealityKit/PortalComponent/Plane/normal) The normal of the portal plane, in entity local space. [`var position: SIMD3`](/documentation/RealityKit/PortalComponent/Plane/position) The position of the portal plane, in entity local space. ### Type Properties [`static let negativeX: PortalComponent.Plane`](/documentation/RealityKit/PortalComponent/Plane/negativeX) A portal plane sitting at the origin facing the negative x direction. [`static let negativeY: PortalComponent.Plane`](/documentation/RealityKit/PortalComponent/Plane/negativeY) A portal plane sitting at the origin facing the negative y direction. [`static let negativeZ: PortalComponent.Plane`](/documentation/RealityKit/PortalComponent/Plane/negativeZ) A portal plane sitting at the origin facing the negative z direction. [`static let positiveX: PortalComponent.Plane`](/documentation/RealityKit/PortalComponent/Plane/positiveX) A portal plane sitting at the origin facing the positive x direction. [`static let positiveY: PortalComponent.Plane`](/documentation/RealityKit/PortalComponent/Plane/positiveY) A portal plane sitting at the origin facing the positive y direction. [`static let positiveZ: PortalComponent.Plane`](/documentation/RealityKit/PortalComponent/Plane/positiveZ) A portal plane sitting at the origin facing the positive z direction. ## Relationships ### Conforms To [`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)