# unprojectPoint(_:) Unprojects a point from the 2D pixel coordinate system of the renderer to the 3D world coordinate system of the scene. ``` func unprojectPoint(_ point: SCNVector3) -> SCNVector3 ``` ## Parameters `point` A point in the screen-space (view, layer, or GPU viewport) coordinate system of the scene renderer. ## Return Value The corresponding point in the world coordinate system of the renderer’s scene. ## Discussion The z-coordinate of the `point` parameter describes the depth at which to unproject the point relative to the near and far clipping planes of the renderer’s viewing frustum (defined by its [`pointOfView`](/documentation/SceneKit/SCNSceneRenderer/pointOfView) node). Unprojecting a point whose z-coordinate is `0.0` returns a point on the near clipping plane; unprojecting a point whose z-coordinate is `1.0` returns a point on the far clipping plane. A 2D point in the rendered screen coordinate space can refer to any point along a line segment in the 3D scene coordinate space. To test for scene contents along this line—for example, to find the geometry corresponding to the location of a click event in a view—use the [`hitTest(_:options:)`](/documentation/SceneKit/SCNSceneRenderer/hitTest(_:options:)) method. --- 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)