---
title: RotationAxis3D
framework: spatial
role: symbol
role_heading: Structure
path: spatial/rotationaxis3d
---

# RotationAxis3D

A 3D rotation axis.

## Declaration

```swift
struct RotationAxis3D
```

## Topics

### Creating a 3D rotation axis structure

- [init()](spatial/rotationaxis3d/init().md)
- [init(_:)](spatial/rotationaxis3d/init(_:)-96si4.md)
- [init(_:)](spatial/rotationaxis3d/init(_:)-804sx.md)
- [init(vector:)](spatial/rotationaxis3d/init(vector:).md)
- [init(_:)](spatial/rotationaxis3d/init(_:)-2zdal.md)
- [init(x:y:z:)](spatial/rotationaxis3d/init(x:y:z:)-3z5nm.md)
- [init(x:y:z:)](spatial/rotationaxis3d/init(x:y:z:)-1x93q.md)

### Checking characteristics

- [x](spatial/rotationaxis3d/x-swift.property.md)
- [y](spatial/rotationaxis3d/y-swift.property.md)
- [z](spatial/rotationaxis3d/z-swift.property.md)
- [vector](spatial/rotationaxis3d/vector.md)
- [isZero](spatial/rotationaxis3d/iszero.md)

### Constants

- [x](spatial/rotationaxis3d/x-swift.type.property.md)
- [y](spatial/rotationaxis3d/y-swift.type.property.md)
- [z](spatial/rotationaxis3d/z-swift.type.property.md)
- [xy](spatial/rotationaxis3d/xy.md)
- [yz](spatial/rotationaxis3d/yz.md)
- [xz](spatial/rotationaxis3d/xz.md)
- [xyz](spatial/rotationaxis3d/xyz.md)
- [zero](spatial/rotationaxis3d/zero.md)

### Deprecated symbols

- [simd](spatial/rotationaxis3d/simd.md)

### Initializers

- [init(_:)](spatial/rotationaxis3d/init(_:)-ctks.md)
- [init(_:)](spatial/rotationaxis3d/init(_:)-lvvq.md)

### Default Implementations

- [CustomReflectable Implementations](spatial/rotationaxis3d/customreflectable-implementations.md)
- [Decodable Implementations](spatial/rotationaxis3d/decodable-implementations.md)
- [Encodable Implementations](spatial/rotationaxis3d/encodable-implementations.md)
- [Equatable Implementations](spatial/rotationaxis3d/equatable-implementations.md)
- [Hashable Implementations](spatial/rotationaxis3d/hashable-implementations.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomReflectable](swift/customreflectable.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### 3D primitives

- [Point3D](spatial/point3d.md)
- [Point3DFloat](spatial/point3dfloat.md)
- [Size3D](spatial/size3d.md)
- [Size3DFloat](spatial/size3dfloat.md)
- [Rect3D](spatial/rect3d.md)
- [Rect3DFloat](spatial/rect3dfloat.md)
- [Rotation3D](spatial/rotation3d.md)
- [Rotation3DFloat](spatial/rotation3dfloat.md)
- [RotationAxis3DFloat](spatial/rotationaxis3dfloat.md)
- [Pose3D](spatial/pose3d.md)
- [Pose3DFloat](spatial/pose3dfloat.md)
- [ScaledPose3D](spatial/scaledpose3d.md)
- [ScaledPose3DFloat](spatial/scaledpose3dfloat.md)
- [SphericalCoordinates3D](spatial/sphericalcoordinates3d.md)
- [SphericalCoordinates3DFloat](spatial/sphericalcoordinates3dfloat.md)