# ray(through:in:to:) Determines the position and direction of a ray through the given point in the 2D space of the view. ``` func ray(through point: CGPoint, in space: some CoordinateSpaceProtocol, to realitySpace: some RealityCoordinateSpace) -> (origin: SIMD3, direction: SIMD3)? ``` ## Parameters `point` A point in the provided coordinate space. `space` The 2D coordinate space in which to interpret the `point`. `realitySpace` The 3D coordinate space you want the returned ray in. ## Return Value A 3D ray, expressed in the `realitySpace` coordinate space, which starts at the camera position and passes through the specified `point`. --- 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)