# isNode(_:insideFrustumOf:) Returns a Boolean value indicating whether a node might be visible from a specified point of view. ``` func isNode(_ node: SCNNode, insideFrustumOf pointOfView: SCNNode) -> Bool ``` ## Parameters `node` The node whose visibility is to be tested. `pointOfView` A node defining a point of view, as used by the [`pointOfView`](/documentation/SceneKit/SCNSceneRenderer/pointOfView) property. ## Return Value if the bounding box of the tested node intersects the view frustum defined by the `pointOfView` node; otherwise, . ## Discussion Any node containing a camera or spotlight may serve as a point of view (see the [`pointOfView`](/documentation/SceneKit/SCNSceneRenderer/pointOfView) property for details). Such a node defines a *viewing frustum*—a portion of the scene’s coordinate space, shaped like a truncated pyramid, that encloses all points visible from that point of view. Use this method to test whether a node lies within the viewing frustum defined by another node (which may or may not be the scene renderer’s current [`pointOfView`](/documentation/SceneKit/SCNSceneRenderer/pointOfView) node). For example, in a game scene containing multiple camera nodes, you could use this method to determine which camera is currently best for viewing a moving player character. Note that this method does not perform occlusion testing. That is, it returns if the tested node lies within the specified viewing frustum regardless of whether that node’s contents are obscured by other geometry. --- 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)