---
title: radiusBufferOffset
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlaccelerationstructurecurvegeometrydescriptor/radiusbufferoffset
---

# radiusBufferOffset

The offset, in bytes, to the radius data in the buffer.

## Declaration

```swift
var radiusBufferOffset: Int { get set }
```

## Discussion

Discussion The offset needs to be a multiple of the radius format you configure with the radiusFormat property. You also need to align the offset to both the radius format’s size and the platform’s buffer alignment requirement.