---
title: "rotation(atTime:)"
framework: modelio
role: symbol
role_heading: Instance Method
path: "modelio/mdltransform/rotation(attime:)"
---

# rotation(atTime:)

Returns the orientation of the transform relative to its parent coordinate space, as of the specified time sample.

## Declaration

```swift
func rotation(atTime time: TimeInterval) -> vector_float3
```

## Parameters

- `time`: The time sample for which to request information.

## Return Value

Return Value The orientation, as a vector of Euler angles in radians, of the transform.

## Discussion

Discussion The three components of the rotation 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 factors, rotation defines the local coordinate space for any object affected by the transform, relative to a parent coordinate space. To work with the complete transform, use the localTransform(atTime:) and setLocalTransform(_:forTime:) methods. Requesting a sample outside the time range clamps results to the minimumTime or maximumTime sample. Some asset formats support continuous sampling, with interpolation for times between the samples stored in the asset; others are discrete. For an asset with discrete time information, requesting a sample time in between the samples stored in the asset returns data for the immediately preceding time.

## See Also

### Using Factors of an Animated Transform

- [translation(atTime:)](modelio/mdltransform/translation(attime:).md)
- [setTranslation(_:forTime:)](modelio/mdltransform/settranslation(_:fortime:).md)
- [rotationMatrix(atTime:)](modelio/mdltransform/rotationmatrix(attime:).md)
- [setRotation(_:forTime:)](modelio/mdltransform/setrotation(_:fortime:).md)
- [scale(atTime:)](modelio/mdltransform/scale(attime:).md)
- [setScale(_:forTime:)](modelio/mdltransform/setscale(_:fortime:).md)
- [shear(atTime:)](modelio/mdltransform/shear(attime:).md)
- [setShear(_:forTime:)](modelio/mdltransform/setshear(_:fortime:).md)
- [setMatrix(_:forTime:)](modelio/mdltransform/setmatrix(_:fortime:).md)