---
title: rotation
framework: modelio
role: symbol
role_heading: Instance Property
path: modelio/mdltransform/rotation
---

# rotation

The orientation, as a vector of Euler angles in radians, of the transform relative to its parent coordinate space.

## Declaration

```swift
var rotation: vector_float3 { get set }
```

## Discussion

Discussion The three components of this vector describe counterclockwise rotation around the corresponding axes. In a coordinate system where the negative z-axis direction is considered “forward”, these components are pitch (rotation about the x-axis), yaw (rotation about the y-axis), and roll (rotation about the z-axis). Together with the translation, scale, and shear properties, this property defines the local coordinate space for any object affected by the transform, relative to a parent coordinate space. Use the matrix property to work with the complete transform. If the transform includes time-based information, reading this property returns the rotation as of the earliest time sample (as reported by the minimumTime property). Writing to this property erases any time-sampled data for the rotation factor. To work with time-sampled data from an animated transform, use the rotation(atTime:) and setRotation(_:forTime:) methods.

## See Also

### Using Factors of a Static Transform

- [translation](modelio/mdltransform/translation.md)
- [scale](modelio/mdltransform/scale.md)
- [shear](modelio/mdltransform/shear.md)
- [setIdentity()](modelio/mdltransform/setidentity().md)