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# rotation3DEffect(_:anchor:)

Rotates content by the specified 3D rotation value.

```
@export(implementation) func rotation3DEffect(_ rotation: Rotation3D, anchor: UnitPoint3D = .center) -> some VisualEffect
```

## Parameters

`rotation`

A rotation to apply to the content.

`anchor`

The unit point within the content about which to perform
the rotation. The default value is [`center`](/documentation/SwiftUI/UnitPoint3D/center).

## Return Value

A rotation effect.

## Discussion

This effect causes the content to appear rotated, but
doesn’t change the content’s frame. The following code
applies a rotation of 45° about the y-axis, using
the default anchor point at the center of the content:

```
Model3D(named: "robot")
    .visualEffect { content, geometryProxy in
        content
            .rotation3DEffect(Rotation3D(angle: .degrees(45), axis: .y))
    }
```

During an animation, this modifier uses spherical linear interpolation,
which produces more natural animations, but doesn’t support rotations
over 360 degrees. To specify angles over 360 degrees, consider using
`View/rotation3DEffect(_:axis:anchor:)-4enag`.

---

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