---
title: chamferRadius
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scnbox/chamferradius
---

# chamferRadius

The radius of curvature for the edges and corners of the box. Animatable.

## Declaration

```swift
var chamferRadius: CGFloat { get set }
```

## Discussion

Discussion The minimum (and default) corner radius is 0.0, specifying square corners. Set this property to a nonzero value to add rounded edges and corners to the box. Setting a corner radius of less than zero creates an empty geometry. The maximum corner radius is half the box’s smallest dimension. For example, if a box’s width and length are both 5.0 and its height is 10.0, its maximum corner radius is 2.5. With these dimensions, the box’s four rounded vertical edges join to form a cylinder and its vertical faces disappear. Increasing the corner radius beyond the maximum has no visible effect. You can animate changes to this property’s value. See Animating SceneKit Content.

## See Also

### Adding Rounded Edges and Corners

- [chamferSegmentCount](scenekit/scnbox/chamfersegmentcount.md)