# normalize(_:) Returns a vector pointing in the same direction of the supplied vector with a length of 1. ``` func normalize(_ x: SIMD3) -> SIMD3 ``` ## Parameters `x` The vector to normalize. ## Return Value The normalized vector. ## Discussion This function returns an undefined value if the supplied vector has zero length or is poorly scaled such that an intermediate computation overflows or underflows. --- 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)