---
title: "swingTwist(twistAxis:)"
framework: spatial
role: symbol
role_heading: Instance Method
path: "spatial/rotation3dfloat/swingtwist(twistaxis:)"
---

# swingTwist(twistAxis:)

Returns the rotation’s swing-twist decomposition for a given twist axis.

## Declaration

```swift
func swingTwist(twistAxis: RotationAxis3DFloat) -> (swing: Rotation3DFloat, twist: Rotation3DFloat)
```

## Return Value

Return Value A tuple that contains the swing rotation and the twist rotation.

## Discussion

Discussion Parameter twistAxis The twist axis.