---
title: "init(_:)"
framework: swift
role: symbol
role_heading: Initializer
path: "swift/simd3/init(_:)-wsoa"
---

# init(_:)

Returns a new vector from a Spatial rotation axis.

## Declaration

```swift
init(_ rotationAxis: RotationAxis3D)
```

## Discussion

Discussion Values rounded to a representable value, if necessary. note: This function is provided as a convenience. All Spatial storage and calculations are double-precision.