# unproject(_:viewport:) Maps a 2D point from the pixel coordinate system of a viewport into a 3D coordinate space. The point lies on this view’s near clipping plane. ``` @MainActor @preconcurrency func unproject(_ point: CGPoint, viewport: CGRect) -> SIMD3? ``` ## Parameters `point` A point in `viewport`. `viewport` A viewport. ## Return Value A view-space 3D coordinate. --- 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)