---
title: "init(_:)"
framework: spatial
role: symbol
role_heading: Initializer
path: "spatial/rotation3d/init(_:)-8z2bn"
---

# init(_:)

Creates a rotation from the specified double-precision quaternion.

## Declaration

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

## Parameters

- `quaternion`: A double-precision quaternion that specifies the rotation.

## See Also

### Creating a 3D rotation structure

- [init()](spatial/rotation3d/init()-2uz53.md)
- [init()](spatial/rotation3d/init()-krpj.md)
- [init(eulerAngles:)](spatial/rotation3d/init(eulerangles:).md)
- [init(eulerAngles:)](spatial/rotation3d/init(eulerangles:).md)
- [EulerAngles](spatial/eulerangles.md)
- [init(quaternion:)](spatial/rotation3d/init(quaternion:)-2c79y.md)
- [init(_:)](spatial/rotation3d/init(_:)-829qb.md)
- [init(angle:axis:)](spatial/rotation3d/init(angle:axis:).md)
- [init(position:target:up:)](spatial/rotation3d/init(position:target:up:).md)
- [init(forward:)](spatial/rotation3d/init(forward:).md)
- [init(forward:up:)](spatial/rotation3d/init(forward:up:).md)
- [init(forward:up:)](spatial/rotation3d/init(forward:up:).md)