---
title: "init(_:)"
framework: spatial
role: symbol
role_heading: Initializer
path: "spatial/rotation3dfloat/init(_:)-20sue"
---

# init(_:)

Returns a new rotation from a double-precision quaternion.

## Declaration

```swift
init(_ quaternion: simd_quatd)
```

## Discussion

Discussion note: This function is provided as a convenience. All Spatial storage and calculations are single-precision.