---
title: "simd_quaternion(_:_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_quaternion(_:_:)-6a6gg"
---

# simd_quaternion(_:_:)

## Declaration

```swift
func simd_quaternion(_ angle: Float16, _ axis: simd_half3) -> simd_quath
```

## Discussion

Discussion Constructs a quaternion that rotates by angle radians about axis.