---
title: "init(_:)"
framework: simd
role: symbol
role_heading: Initializer
path: "simd/simd_quatd/init(_:)-3wkyg"
---

# init(_:)

Returns a new quaternion from a Spatial rotation.

## Declaration

```swift
init(_ rotation: Rotation3DFloat)
```

## Discussion

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