---
title: "worldTransform(for:)"
framework: nearbyinteraction
role: symbol
role_heading: Instance Method
path: "nearbyinteraction/nisession/worldtransform(for:)"
---

# worldTransform(for:)

Returns a world transform to integrate a nearby object in an AR experience.

## Declaration

```swift
func worldTransform(for object: NINearbyObject) -> simd_float4x4?
```

## Parameters

- `object`: The object for which to calculate a world transform.

## Return Value

Return Value A world transform in ARKit’s coordinate space.

## Discussion

Discussion This ARKit transform represents the given object’s position in the physical environment, if it’s available. Otherwise, this function returns nil. With this transform, you can: Overlay 3D virtual content onto a camera-feed visualization where the nearby object resides in the physical environment, such as done by an AR app’s renderer. Play a 3D-spatial sound from the location of the nearby object, for example, by using PHASE.

## See Also

### Utilizing Camera Assistance

- [setARSession(_:)](nearbyinteraction/nisession/setarsession(_:).md)