---
title: center
framework: arkit
role: symbol
role_heading: Instance Property
path: arkit/arreferenceobject/center
---

# center

The center point of the reference object’s space-mapping data.

## Declaration

```swift
var center: simd_float3 { get }
```

## Discussion

Discussion The extent and center properties together define a bounding box for the data recorded in the reference object in its local coordinate system. You define that coordinate system with the transform parameter when calling extractReferenceObject(transform:center:extent:), and can modify it by creating another reference object with applyingTransform(_:).

## See Also

### Examining a Reference Object

- [name](arkit/arreferenceobject/name.md)
- [resourceGroupName](arkit/arreferenceobject/resourcegroupname.md)
- [extent](arkit/arreferenceobject/extent.md)
- [scale](arkit/arreferenceobject/scale.md)